2233 lines
96 KiB
JavaScript
2233 lines
96 KiB
JavaScript
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/**
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* Cesium - https://github.com/CesiumGS/cesium
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*
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* Copyright 2011-2020 Cesium Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Columbus View (Pat. Pend.)
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*
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* Portions licensed separately.
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* See https://github.com/CesiumGS/cesium/blob/master/LICENSE.md for full licensing details.
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*/
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define(['exports', './when-8d13db60', './Check-70bec281', './Math-61ede240', './Cartographic-fe4be337', './BoundingSphere-775c5788', './Cartesian4-5af5bb24', './ComponentDatatype-5862616f', './GeometryAttribute-ed9d707f', './PrimitiveType-97893bc7', './Transforms-a1cf7267', './GeometryAttributes-aacecde6', './Plane-8390418f', './VertexFormat-fe4db402'], function (exports, when, Check, _Math, Cartographic, BoundingSphere, Cartesian4, ComponentDatatype, GeometryAttribute, PrimitiveType, Transforms, GeometryAttributes, Plane, VertexFormat) { 'use strict';
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/**
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* The culling volume defined by planes.
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*
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* @alias CullingVolume
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* @constructor
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*
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* @param {Cartesian4[]} [planes] An array of clipping planes.
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*/
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function CullingVolume(planes) {
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/**
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* Each plane is represented by a Cartesian4 object, where the x, y, and z components
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* define the unit vector normal to the plane, and the w component is the distance of the
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* plane from the origin.
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* @type {Cartesian4[]}
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* @default []
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*/
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this.planes = when.defaultValue(planes, []);
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}
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var faces = [new Cartographic.Cartesian3(), new Cartographic.Cartesian3(), new Cartographic.Cartesian3()];
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Cartographic.Cartesian3.clone(Cartographic.Cartesian3.UNIT_X, faces[0]);
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Cartographic.Cartesian3.clone(Cartographic.Cartesian3.UNIT_Y, faces[1]);
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Cartographic.Cartesian3.clone(Cartographic.Cartesian3.UNIT_Z, faces[2]);
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var scratchPlaneCenter = new Cartographic.Cartesian3();
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var scratchPlaneNormal = new Cartographic.Cartesian3();
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var scratchPlane = new Plane.Plane(new Cartographic.Cartesian3(1.0, 0.0, 0.0), 0.0);
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/**
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* Constructs a culling volume from a bounding sphere. Creates six planes that create a box containing the sphere.
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* The planes are aligned to the x, y, and z axes in world coordinates.
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*
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* @param {BoundingSphere} boundingSphere The bounding sphere used to create the culling volume.
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* @param {CullingVolume} [result] The object onto which to store the result.
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* @returns {CullingVolume} The culling volume created from the bounding sphere.
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*/
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CullingVolume.fromBoundingSphere = function(boundingSphere, result) {
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//>>includeStart('debug', pragmas.debug);
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if (!when.defined(boundingSphere)) {
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throw new Check.DeveloperError('boundingSphere is required.');
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}
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//>>includeEnd('debug');
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if (!when.defined(result)) {
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result = new CullingVolume();
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}
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var length = faces.length;
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var planes = result.planes;
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planes.length = 2 * length;
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var center = boundingSphere.center;
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var radius = boundingSphere.radius;
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var planeIndex = 0;
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for (var i = 0; i < length; ++i) {
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var faceNormal = faces[i];
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var plane0 = planes[planeIndex];
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var plane1 = planes[planeIndex + 1];
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if (!when.defined(plane0)) {
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plane0 = planes[planeIndex] = new Cartesian4.Cartesian4();
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}
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if (!when.defined(plane1)) {
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plane1 = planes[planeIndex + 1] = new Cartesian4.Cartesian4();
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}
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Cartographic.Cartesian3.multiplyByScalar(faceNormal, -radius, scratchPlaneCenter);
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Cartographic.Cartesian3.add(center, scratchPlaneCenter, scratchPlaneCenter);
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plane0.x = faceNormal.x;
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plane0.y = faceNormal.y;
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plane0.z = faceNormal.z;
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plane0.w = -Cartographic.Cartesian3.dot(faceNormal, scratchPlaneCenter);
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Cartographic.Cartesian3.multiplyByScalar(faceNormal, radius, scratchPlaneCenter);
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Cartographic.Cartesian3.add(center, scratchPlaneCenter, scratchPlaneCenter);
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plane1.x = -faceNormal.x;
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plane1.y = -faceNormal.y;
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plane1.z = -faceNormal.z;
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plane1.w = -Cartographic.Cartesian3.dot(Cartographic.Cartesian3.negate(faceNormal, scratchPlaneNormal), scratchPlaneCenter);
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planeIndex += 2;
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}
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return result;
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};
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/**
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* Determines whether a bounding volume intersects the culling volume.
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*
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* @param {Object} boundingVolume The bounding volume whose intersection with the culling volume is to be tested.
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* @returns {Intersect} Intersect.OUTSIDE, Intersect.INTERSECTING, or Intersect.INSIDE.
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*/
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CullingVolume.prototype.computeVisibility = function(boundingVolume) {
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//>>includeStart('debug', pragmas.debug);
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if (!when.defined(boundingVolume)) {
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throw new Check.DeveloperError('boundingVolume is required.');
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}
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//>>includeEnd('debug');
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var planes = this.planes;
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var intersecting = false;
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for (var k = 0, len = planes.length; k < len; ++k) {
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var result = boundingVolume.intersectPlane(Plane.Plane.fromCartesian4(planes[k], scratchPlane));
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if (result === BoundingSphere.Intersect.OUTSIDE) {
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return BoundingSphere.Intersect.OUTSIDE;
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} else if (result === BoundingSphere.Intersect.INTERSECTING) {
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intersecting = true;
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}
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}
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return intersecting ? BoundingSphere.Intersect.INTERSECTING : BoundingSphere.Intersect.INSIDE;
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};
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/**
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* Determines whether a bounding volume intersects the culling volume.
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*
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* @param {Object} boundingVolume The bounding volume whose intersection with the culling volume is to be tested.
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* @param {Number} parentPlaneMask A bit mask from the boundingVolume's parent's check against the same culling
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* volume, such that if (planeMask & (1 << planeIndex) === 0), for k < 31, then
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* the parent (and therefore this) volume is completely inside plane[planeIndex]
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* and that plane check can be skipped.
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* @returns {Number} A plane mask as described above (which can be applied to this boundingVolume's children).
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*
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* @private
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*/
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CullingVolume.prototype.computeVisibilityWithPlaneMask = function(boundingVolume, parentPlaneMask) {
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//>>includeStart('debug', pragmas.debug);
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if (!when.defined(boundingVolume)) {
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throw new Check.DeveloperError('boundingVolume is required.');
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}
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if (!when.defined(parentPlaneMask)) {
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throw new Check.DeveloperError('parentPlaneMask is required.');
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}
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//>>includeEnd('debug');
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if (parentPlaneMask === CullingVolume.MASK_OUTSIDE || parentPlaneMask === CullingVolume.MASK_INSIDE) {
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// parent is completely outside or completely inside, so this child is as well.
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return parentPlaneMask;
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}
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// Start with MASK_INSIDE (all zeros) so that after the loop, the return value can be compared with MASK_INSIDE.
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// (Because if there are fewer than 31 planes, the upper bits wont be changed.)
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var mask = CullingVolume.MASK_INSIDE;
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var planes = this.planes;
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for (var k = 0, len = planes.length; k < len; ++k) {
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// For k greater than 31 (since 31 is the maximum number of INSIDE/INTERSECTING bits we can store), skip the optimization.
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var flag = (k < 31) ? (1 << k) : 0;
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if (k < 31 && (parentPlaneMask & flag) === 0) {
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// boundingVolume is known to be INSIDE this plane.
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continue;
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}
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var result = boundingVolume.intersectPlane(Plane.Plane.fromCartesian4(planes[k], scratchPlane));
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if (result === BoundingSphere.Intersect.OUTSIDE) {
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return CullingVolume.MASK_OUTSIDE;
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} else if (result === BoundingSphere.Intersect.INTERSECTING) {
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mask |= flag;
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}
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}
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return mask;
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};
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/**
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* For plane masks (as used in {@link CullingVolume#computeVisibilityWithPlaneMask}), this special value
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* represents the case where the object bounding volume is entirely outside the culling volume.
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*
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* @type {Number}
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* @private
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*/
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CullingVolume.MASK_OUTSIDE = 0xffffffff;
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/**
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* For plane masks (as used in {@link CullingVolume.prototype.computeVisibilityWithPlaneMask}), this value
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* represents the case where the object bounding volume is entirely inside the culling volume.
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*
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* @type {Number}
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* @private
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*/
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CullingVolume.MASK_INSIDE = 0x00000000;
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/**
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* For plane masks (as used in {@link CullingVolume.prototype.computeVisibilityWithPlaneMask}), this value
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* represents the case where the object bounding volume (may) intersect all planes of the culling volume.
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*
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* @type {Number}
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* @private
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*/
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CullingVolume.MASK_INDETERMINATE = 0x7fffffff;
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/**
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* The viewing frustum is defined by 6 planes.
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* Each plane is represented by a {@link Cartesian4} object, where the x, y, and z components
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* define the unit vector normal to the plane, and the w component is the distance of the
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* plane from the origin/camera position.
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*
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* @alias OrthographicOffCenterFrustum
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* @constructor
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*
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* @param {Object} [options] An object with the following properties:
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* @param {Number} [options.left] The left clipping plane distance.
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* @param {Number} [options.right] The right clipping plane distance.
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* @param {Number} [options.top] The top clipping plane distance.
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* @param {Number} [options.bottom] The bottom clipping plane distance.
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* @param {Number} [options.near=1.0] The near clipping plane distance.
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* @param {Number} [options.far=500000000.0] The far clipping plane distance.
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*
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* @example
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* var maxRadii = ellipsoid.maximumRadius;
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*
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* var frustum = new Cesium.OrthographicOffCenterFrustum();
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* frustum.right = maxRadii * Cesium.Math.PI;
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* frustum.left = -c.frustum.right;
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* frustum.top = c.frustum.right * (canvas.clientHeight / canvas.clientWidth);
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* frustum.bottom = -c.frustum.top;
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* frustum.near = 0.01 * maxRadii;
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* frustum.far = 50.0 * maxRadii;
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*/
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function OrthographicOffCenterFrustum(options) {
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options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
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/**
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* The left clipping plane.
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* @type {Number}
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* @default undefined
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*/
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this.left = options.left;
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this._left = undefined;
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/**
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* The right clipping plane.
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* @type {Number}
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* @default undefined
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*/
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this.right = options.right;
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this._right = undefined;
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/**
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* The top clipping plane.
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* @type {Number}
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* @default undefined
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*/
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this.top = options.top;
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this._top = undefined;
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/**
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* The bottom clipping plane.
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* @type {Number}
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* @default undefined
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*/
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this.bottom = options.bottom;
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this._bottom = undefined;
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/**
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* The distance of the near plane.
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* @type {Number}
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* @default 1.0
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*/
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this.near = when.defaultValue(options.near, 1.0);
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this._near = this.near;
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/**
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* The distance of the far plane.
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* @type {Number}
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* @default 500000000.0;
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*/
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this.far = when.defaultValue(options.far, 500000000.0);
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this._far = this.far;
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this._cullingVolume = new CullingVolume();
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this._orthographicMatrix = new BoundingSphere.Matrix4();
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}
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function update(frustum) {
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//>>includeStart('debug', pragmas.debug);
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if (!when.defined(frustum.right) || !when.defined(frustum.left) ||
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!when.defined(frustum.top) || !when.defined(frustum.bottom) ||
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!when.defined(frustum.near) || !when.defined(frustum.far)) {
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throw new Check.DeveloperError('right, left, top, bottom, near, or far parameters are not set.');
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}
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//>>includeEnd('debug');
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if (frustum.top !== frustum._top || frustum.bottom !== frustum._bottom ||
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frustum.left !== frustum._left || frustum.right !== frustum._right ||
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frustum.near !== frustum._near || frustum.far !== frustum._far) {
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//>>includeStart('debug', pragmas.debug);
|
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if (frustum.left > frustum.right) {
|
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throw new Check.DeveloperError('right must be greater than left.');
|
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}
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if (frustum.bottom > frustum.top) {
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throw new Check.DeveloperError('top must be greater than bottom.');
|
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}
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if (frustum.near <= 0 || frustum.near > frustum.far) {
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throw new Check.DeveloperError('near must be greater than zero and less than far.');
|
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}
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//>>includeEnd('debug');
|
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frustum._left = frustum.left;
|
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frustum._right = frustum.right;
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frustum._top = frustum.top;
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frustum._bottom = frustum.bottom;
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frustum._near = frustum.near;
|
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frustum._far = frustum.far;
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frustum._orthographicMatrix = BoundingSphere.Matrix4.computeOrthographicOffCenter(frustum.left, frustum.right, frustum.bottom, frustum.top, frustum.near, frustum.far, frustum._orthographicMatrix);
|
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}
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}
|
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Object.defineProperties(OrthographicOffCenterFrustum.prototype, {
|
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/**
|
||
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* Gets the orthographic projection matrix computed from the view frustum.
|
||
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* @memberof OrthographicOffCenterFrustum.prototype
|
||
|
|
* @type {Matrix4}
|
||
|
|
* @readonly
|
||
|
|
*/
|
||
|
|
projectionMatrix : {
|
||
|
|
get : function() {
|
||
|
|
update(this);
|
||
|
|
return this._orthographicMatrix;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
var getPlanesRight = new Cartographic.Cartesian3();
|
||
|
|
var getPlanesNearCenter = new Cartographic.Cartesian3();
|
||
|
|
var getPlanesPoint = new Cartographic.Cartesian3();
|
||
|
|
var negateScratch = new Cartographic.Cartesian3();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a culling volume for this frustum.
|
||
|
|
*
|
||
|
|
* @param {Cartesian3} position The eye position.
|
||
|
|
* @param {Cartesian3} direction The view direction.
|
||
|
|
* @param {Cartesian3} up The up direction.
|
||
|
|
* @returns {CullingVolume} A culling volume at the given position and orientation.
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // Check if a bounding volume intersects the frustum.
|
||
|
|
* var cullingVolume = frustum.computeCullingVolume(cameraPosition, cameraDirection, cameraUp);
|
||
|
|
* var intersect = cullingVolume.computeVisibility(boundingVolume);
|
||
|
|
*/
|
||
|
|
OrthographicOffCenterFrustum.prototype.computeCullingVolume = function(position, direction, up) {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
if (!when.defined(position)) {
|
||
|
|
throw new Check.DeveloperError('position is required.');
|
||
|
|
}
|
||
|
|
if (!when.defined(direction)) {
|
||
|
|
throw new Check.DeveloperError('direction is required.');
|
||
|
|
}
|
||
|
|
if (!when.defined(up)) {
|
||
|
|
throw new Check.DeveloperError('up is required.');
|
||
|
|
}
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
var planes = this._cullingVolume.planes;
|
||
|
|
var t = this.top;
|
||
|
|
var b = this.bottom;
|
||
|
|
var r = this.right;
|
||
|
|
var l = this.left;
|
||
|
|
var n = this.near;
|
||
|
|
var f = this.far;
|
||
|
|
|
||
|
|
var right = Cartographic.Cartesian3.cross(direction, up, getPlanesRight);
|
||
|
|
Cartographic.Cartesian3.normalize(right, right);
|
||
|
|
var nearCenter = getPlanesNearCenter;
|
||
|
|
Cartographic.Cartesian3.multiplyByScalar(direction, n, nearCenter);
|
||
|
|
Cartographic.Cartesian3.add(position, nearCenter, nearCenter);
|
||
|
|
|
||
|
|
var point = getPlanesPoint;
|
||
|
|
|
||
|
|
// Left plane
|
||
|
|
Cartographic.Cartesian3.multiplyByScalar(right, l, point);
|
||
|
|
Cartographic.Cartesian3.add(nearCenter, point, point);
|
||
|
|
|
||
|
|
var plane = planes[0];
|
||
|
|
if (!when.defined(plane)) {
|
||
|
|
plane = planes[0] = new Cartesian4.Cartesian4();
|
||
|
|
}
|
||
|
|
plane.x = right.x;
|
||
|
|
plane.y = right.y;
|
||
|
|
plane.z = right.z;
|
||
|
|
plane.w = -Cartographic.Cartesian3.dot(right, point);
|
||
|
|
|
||
|
|
// Right plane
|
||
|
|
Cartographic.Cartesian3.multiplyByScalar(right, r, point);
|
||
|
|
Cartographic.Cartesian3.add(nearCenter, point, point);
|
||
|
|
|
||
|
|
plane = planes[1];
|
||
|
|
if (!when.defined(plane)) {
|
||
|
|
plane = planes[1] = new Cartesian4.Cartesian4();
|
||
|
|
}
|
||
|
|
plane.x = -right.x;
|
||
|
|
plane.y = -right.y;
|
||
|
|
plane.z = -right.z;
|
||
|
|
plane.w = -Cartographic.Cartesian3.dot(Cartographic.Cartesian3.negate(right, negateScratch), point);
|
||
|
|
|
||
|
|
// Bottom plane
|
||
|
|
Cartographic.Cartesian3.multiplyByScalar(up, b, point);
|
||
|
|
Cartographic.Cartesian3.add(nearCenter, point, point);
|
||
|
|
|
||
|
|
plane = planes[2];
|
||
|
|
if (!when.defined(plane)) {
|
||
|
|
plane = planes[2] = new Cartesian4.Cartesian4();
|
||
|
|
}
|
||
|
|
plane.x = up.x;
|
||
|
|
plane.y = up.y;
|
||
|
|
plane.z = up.z;
|
||
|
|
plane.w = -Cartographic.Cartesian3.dot(up, point);
|
||
|
|
|
||
|
|
// Top plane
|
||
|
|
Cartographic.Cartesian3.multiplyByScalar(up, t, point);
|
||
|
|
Cartographic.Cartesian3.add(nearCenter, point, point);
|
||
|
|
|
||
|
|
plane = planes[3];
|
||
|
|
if (!when.defined(plane)) {
|
||
|
|
plane = planes[3] = new Cartesian4.Cartesian4();
|
||
|
|
}
|
||
|
|
plane.x = -up.x;
|
||
|
|
plane.y = -up.y;
|
||
|
|
plane.z = -up.z;
|
||
|
|
plane.w = -Cartographic.Cartesian3.dot(Cartographic.Cartesian3.negate(up, negateScratch), point);
|
||
|
|
|
||
|
|
// Near plane
|
||
|
|
plane = planes[4];
|
||
|
|
if (!when.defined(plane)) {
|
||
|
|
plane = planes[4] = new Cartesian4.Cartesian4();
|
||
|
|
}
|
||
|
|
plane.x = direction.x;
|
||
|
|
plane.y = direction.y;
|
||
|
|
plane.z = direction.z;
|
||
|
|
plane.w = -Cartographic.Cartesian3.dot(direction, nearCenter);
|
||
|
|
|
||
|
|
// Far plane
|
||
|
|
Cartographic.Cartesian3.multiplyByScalar(direction, f, point);
|
||
|
|
Cartographic.Cartesian3.add(position, point, point);
|
||
|
|
|
||
|
|
plane = planes[5];
|
||
|
|
if (!when.defined(plane)) {
|
||
|
|
plane = planes[5] = new Cartesian4.Cartesian4();
|
||
|
|
}
|
||
|
|
plane.x = -direction.x;
|
||
|
|
plane.y = -direction.y;
|
||
|
|
plane.z = -direction.z;
|
||
|
|
plane.w = -Cartographic.Cartesian3.dot(Cartographic.Cartesian3.negate(direction, negateScratch), point);
|
||
|
|
|
||
|
|
return this._cullingVolume;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the pixel's width and height in meters.
|
||
|
|
*
|
||
|
|
* @param {Number} drawingBufferWidth The width of the drawing buffer.
|
||
|
|
* @param {Number} drawingBufferHeight The height of the drawing buffer.
|
||
|
|
* @param {Number} distance The distance to the near plane in meters.
|
||
|
|
* @param {Number} pixelRatio The scaling factor from pixel space to coordinate space.
|
||
|
|
* @param {Cartesian2} result The object onto which to store the result.
|
||
|
|
* @returns {Cartesian2} The modified result parameter or a new instance of {@link Cartesian2} with the pixel's width and height in the x and y properties, respectively.
|
||
|
|
*
|
||
|
|
* @exception {DeveloperError} drawingBufferWidth must be greater than zero.
|
||
|
|
* @exception {DeveloperError} drawingBufferHeight must be greater than zero.
|
||
|
|
* @exception {DeveloperError} pixelRatio must be greater than zero.
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // Example 1
|
||
|
|
* // Get the width and height of a pixel.
|
||
|
|
* var pixelSize = camera.frustum.getPixelDimensions(scene.drawingBufferWidth, scene.drawingBufferHeight, 0.0, scene.pixelRatio, new Cesium.Cartesian2());
|
||
|
|
*/
|
||
|
|
OrthographicOffCenterFrustum.prototype.getPixelDimensions = function(drawingBufferWidth, drawingBufferHeight, distance, pixelRatio, result) {
|
||
|
|
update(this);
|
||
|
|
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
if (!when.defined(drawingBufferWidth) || !when.defined(drawingBufferHeight)) {
|
||
|
|
throw new Check.DeveloperError('Both drawingBufferWidth and drawingBufferHeight are required.');
|
||
|
|
}
|
||
|
|
if (drawingBufferWidth <= 0) {
|
||
|
|
throw new Check.DeveloperError('drawingBufferWidth must be greater than zero.');
|
||
|
|
}
|
||
|
|
if (drawingBufferHeight <= 0) {
|
||
|
|
throw new Check.DeveloperError('drawingBufferHeight must be greater than zero.');
|
||
|
|
}
|
||
|
|
if (!when.defined(distance)) {
|
||
|
|
throw new Check.DeveloperError('distance is required.');
|
||
|
|
}
|
||
|
|
if (!when.defined(pixelRatio)) {
|
||
|
|
throw new Check.DeveloperError('pixelRatio is required.');
|
||
|
|
}
|
||
|
|
if (pixelRatio <= 0) {
|
||
|
|
throw new Check.DeveloperError('pixelRatio must be greater than zero.');
|
||
|
|
}
|
||
|
|
if (!when.defined(result)) {
|
||
|
|
throw new Check.DeveloperError('A result object is required.');
|
||
|
|
}
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
var frustumWidth = this.right - this.left;
|
||
|
|
var frustumHeight = this.top - this.bottom;
|
||
|
|
var pixelWidth = pixelRatio * frustumWidth / drawingBufferWidth;
|
||
|
|
var pixelHeight = pixelRatio * frustumHeight / drawingBufferHeight;
|
||
|
|
|
||
|
|
result.x = pixelWidth;
|
||
|
|
result.y = pixelHeight;
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a duplicate of a OrthographicOffCenterFrustum instance.
|
||
|
|
*
|
||
|
|
* @param {OrthographicOffCenterFrustum} [result] The object onto which to store the result.
|
||
|
|
* @returns {OrthographicOffCenterFrustum} The modified result parameter or a new OrthographicOffCenterFrustum instance if one was not provided.
|
||
|
|
*/
|
||
|
|
OrthographicOffCenterFrustum.prototype.clone = function(result) {
|
||
|
|
if (!when.defined(result)) {
|
||
|
|
result = new OrthographicOffCenterFrustum();
|
||
|
|
}
|
||
|
|
|
||
|
|
result.left = this.left;
|
||
|
|
result.right = this.right;
|
||
|
|
result.top = this.top;
|
||
|
|
result.bottom = this.bottom;
|
||
|
|
result.near = this.near;
|
||
|
|
result.far = this.far;
|
||
|
|
|
||
|
|
// force update of clone to compute matrices
|
||
|
|
result._left = undefined;
|
||
|
|
result._right = undefined;
|
||
|
|
result._top = undefined;
|
||
|
|
result._bottom = undefined;
|
||
|
|
result._near = undefined;
|
||
|
|
result._far = undefined;
|
||
|
|
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compares the provided OrthographicOffCenterFrustum componentwise and returns
|
||
|
|
* <code>true</code> if they are equal, <code>false</code> otherwise.
|
||
|
|
*
|
||
|
|
* @param {OrthographicOffCenterFrustum} [other] The right hand side OrthographicOffCenterFrustum.
|
||
|
|
* @returns {Boolean} <code>true</code> if they are equal, <code>false</code> otherwise.
|
||
|
|
*/
|
||
|
|
OrthographicOffCenterFrustum.prototype.equals = function(other) {
|
||
|
|
return (when.defined(other) && other instanceof OrthographicOffCenterFrustum &&
|
||
|
|
this.right === other.right &&
|
||
|
|
this.left === other.left &&
|
||
|
|
this.top === other.top &&
|
||
|
|
this.bottom === other.bottom &&
|
||
|
|
this.near === other.near &&
|
||
|
|
this.far === other.far);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compares the provided OrthographicOffCenterFrustum componentwise and returns
|
||
|
|
* <code>true</code> if they pass an absolute or relative tolerance test,
|
||
|
|
* <code>false</code> otherwise.
|
||
|
|
*
|
||
|
|
* @param {OrthographicOffCenterFrustum} other The right hand side OrthographicOffCenterFrustum.
|
||
|
|
* @param {Number} relativeEpsilon The relative epsilon tolerance to use for equality testing.
|
||
|
|
* @param {Number} [absoluteEpsilon=relativeEpsilon] The absolute epsilon tolerance to use for equality testing.
|
||
|
|
* @returns {Boolean} <code>true</code> if this and other are within the provided epsilon, <code>false</code> otherwise.
|
||
|
|
*/
|
||
|
|
OrthographicOffCenterFrustum.prototype.equalsEpsilon = function(other, relativeEpsilon, absoluteEpsilon) {
|
||
|
|
return (other === this) ||
|
||
|
|
(when.defined(other) &&
|
||
|
|
other instanceof OrthographicOffCenterFrustum &&
|
||
|
|
_Math.CesiumMath.equalsEpsilon(this.right, other.right, relativeEpsilon, absoluteEpsilon) &&
|
||
|
|
_Math.CesiumMath.equalsEpsilon(this.left, other.left, relativeEpsilon, absoluteEpsilon) &&
|
||
|
|
_Math.CesiumMath.equalsEpsilon(this.top, other.top, relativeEpsilon, absoluteEpsilon) &&
|
||
|
|
_Math.CesiumMath.equalsEpsilon(this.bottom, other.bottom, relativeEpsilon, absoluteEpsilon) &&
|
||
|
|
_Math.CesiumMath.equalsEpsilon(this.near, other.near, relativeEpsilon, absoluteEpsilon) &&
|
||
|
|
_Math.CesiumMath.equalsEpsilon(this.far, other.far, relativeEpsilon, absoluteEpsilon));
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The viewing frustum is defined by 6 planes.
|
||
|
|
* Each plane is represented by a {@link Cartesian4} object, where the x, y, and z components
|
||
|
|
* define the unit vector normal to the plane, and the w component is the distance of the
|
||
|
|
* plane from the origin/camera position.
|
||
|
|
*
|
||
|
|
* @alias OrthographicFrustum
|
||
|
|
* @constructor
|
||
|
|
*
|
||
|
|
* @param {Object} [options] An object with the following properties:
|
||
|
|
* @param {Number} [options.width] The width of the frustum in meters.
|
||
|
|
* @param {Number} [options.aspectRatio] The aspect ratio of the frustum's width to it's height.
|
||
|
|
* @param {Number} [options.near=1.0] The distance of the near plane.
|
||
|
|
* @param {Number} [options.far=500000000.0] The distance of the far plane.
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* var maxRadii = ellipsoid.maximumRadius;
|
||
|
|
*
|
||
|
|
* var frustum = new Cesium.OrthographicFrustum();
|
||
|
|
* frustum.near = 0.01 * maxRadii;
|
||
|
|
* frustum.far = 50.0 * maxRadii;
|
||
|
|
*/
|
||
|
|
function OrthographicFrustum(options) {
|
||
|
|
options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
|
||
|
|
|
||
|
|
this._offCenterFrustum = new OrthographicOffCenterFrustum();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The horizontal width of the frustum in meters.
|
||
|
|
* @type {Number}
|
||
|
|
* @default undefined
|
||
|
|
*/
|
||
|
|
this.width = options.width;
|
||
|
|
this._width = undefined;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The aspect ratio of the frustum's width to it's height.
|
||
|
|
* @type {Number}
|
||
|
|
* @default undefined
|
||
|
|
*/
|
||
|
|
this.aspectRatio = options.aspectRatio;
|
||
|
|
this._aspectRatio = undefined;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The distance of the near plane.
|
||
|
|
* @type {Number}
|
||
|
|
* @default 1.0
|
||
|
|
*/
|
||
|
|
this.near = when.defaultValue(options.near, 1.0);
|
||
|
|
this._near = this.near;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The distance of the far plane.
|
||
|
|
* @type {Number}
|
||
|
|
* @default 500000000.0;
|
||
|
|
*/
|
||
|
|
this.far = when.defaultValue(options.far, 500000000.0);
|
||
|
|
this._far = this.far;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The number of elements used to pack the object into an array.
|
||
|
|
* @type {Number}
|
||
|
|
*/
|
||
|
|
OrthographicFrustum.packedLength = 4;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Stores the provided instance into the provided array.
|
||
|
|
*
|
||
|
|
* @param {OrthographicFrustum} value The value to pack.
|
||
|
|
* @param {Number[]} array The array to pack into.
|
||
|
|
* @param {Number} [startingIndex=0] The index into the array at which to start packing the elements.
|
||
|
|
*
|
||
|
|
* @returns {Number[]} The array that was packed into
|
||
|
|
*/
|
||
|
|
OrthographicFrustum.pack = function(value, array, startingIndex) {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
Check.Check.typeOf.object('value', value);
|
||
|
|
Check.Check.defined('array', array);
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
startingIndex = when.defaultValue(startingIndex, 0);
|
||
|
|
|
||
|
|
array[startingIndex++] = value.width;
|
||
|
|
array[startingIndex++] = value.aspectRatio;
|
||
|
|
array[startingIndex++] = value.near;
|
||
|
|
array[startingIndex] = value.far;
|
||
|
|
|
||
|
|
return array;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Retrieves an instance from a packed array.
|
||
|
|
*
|
||
|
|
* @param {Number[]} array The packed array.
|
||
|
|
* @param {Number} [startingIndex=0] The starting index of the element to be unpacked.
|
||
|
|
* @param {OrthographicFrustum} [result] The object into which to store the result.
|
||
|
|
* @returns {OrthographicFrustum} The modified result parameter or a new OrthographicFrustum instance if one was not provided.
|
||
|
|
*/
|
||
|
|
OrthographicFrustum.unpack = function(array, startingIndex, result) {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
Check.Check.defined('array', array);
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
startingIndex = when.defaultValue(startingIndex, 0);
|
||
|
|
|
||
|
|
if (!when.defined(result)) {
|
||
|
|
result = new OrthographicFrustum();
|
||
|
|
}
|
||
|
|
|
||
|
|
result.width = array[startingIndex++];
|
||
|
|
result.aspectRatio = array[startingIndex++];
|
||
|
|
result.near = array[startingIndex++];
|
||
|
|
result.far = array[startingIndex];
|
||
|
|
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
|
||
|
|
function update$1(frustum) {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
if (!when.defined(frustum.width) || !when.defined(frustum.aspectRatio) || !when.defined(frustum.near) || !when.defined(frustum.far)) {
|
||
|
|
throw new Check.DeveloperError('width, aspectRatio, near, or far parameters are not set.');
|
||
|
|
}
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
var f = frustum._offCenterFrustum;
|
||
|
|
|
||
|
|
if (frustum.width !== frustum._width || frustum.aspectRatio !== frustum._aspectRatio ||
|
||
|
|
frustum.near !== frustum._near || frustum.far !== frustum._far) {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
if (frustum.aspectRatio < 0) {
|
||
|
|
throw new Check.DeveloperError('aspectRatio must be positive.');
|
||
|
|
}
|
||
|
|
if (frustum.near < 0 || frustum.near > frustum.far) {
|
||
|
|
throw new Check.DeveloperError('near must be greater than zero and less than far.');
|
||
|
|
}
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
frustum._aspectRatio = frustum.aspectRatio;
|
||
|
|
frustum._width = frustum.width;
|
||
|
|
frustum._near = frustum.near;
|
||
|
|
frustum._far = frustum.far;
|
||
|
|
|
||
|
|
var ratio = 1.0 / frustum.aspectRatio;
|
||
|
|
f.right = frustum.width * 0.5;
|
||
|
|
f.left = -f.right;
|
||
|
|
f.top = ratio * f.right;
|
||
|
|
f.bottom = -f.top;
|
||
|
|
f.near = frustum.near;
|
||
|
|
f.far = frustum.far;
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
Object.defineProperties(OrthographicFrustum.prototype, {
|
||
|
|
/**
|
||
|
|
* Gets the orthographic projection matrix computed from the view frustum.
|
||
|
|
* @memberof OrthographicFrustum.prototype
|
||
|
|
* @type {Matrix4}
|
||
|
|
* @readonly
|
||
|
|
*/
|
||
|
|
projectionMatrix : {
|
||
|
|
get : function() {
|
||
|
|
update$1(this);
|
||
|
|
return this._offCenterFrustum.projectionMatrix;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a culling volume for this frustum.
|
||
|
|
*
|
||
|
|
* @param {Cartesian3} position The eye position.
|
||
|
|
* @param {Cartesian3} direction The view direction.
|
||
|
|
* @param {Cartesian3} up The up direction.
|
||
|
|
* @returns {CullingVolume} A culling volume at the given position and orientation.
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // Check if a bounding volume intersects the frustum.
|
||
|
|
* var cullingVolume = frustum.computeCullingVolume(cameraPosition, cameraDirection, cameraUp);
|
||
|
|
* var intersect = cullingVolume.computeVisibility(boundingVolume);
|
||
|
|
*/
|
||
|
|
OrthographicFrustum.prototype.computeCullingVolume = function(position, direction, up) {
|
||
|
|
update$1(this);
|
||
|
|
return this._offCenterFrustum.computeCullingVolume(position, direction, up);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the pixel's width and height in meters.
|
||
|
|
*
|
||
|
|
* @param {Number} drawingBufferWidth The width of the drawing buffer.
|
||
|
|
* @param {Number} drawingBufferHeight The height of the drawing buffer.
|
||
|
|
* @param {Number} distance The distance to the near plane in meters.
|
||
|
|
* @param {Number} pixelRatio The scaling factor from pixel space to coordinate space.
|
||
|
|
* @param {Cartesian2} result The object onto which to store the result.
|
||
|
|
* @returns {Cartesian2} The modified result parameter or a new instance of {@link Cartesian2} with the pixel's width and height in the x and y properties, respectively.
|
||
|
|
*
|
||
|
|
* @exception {DeveloperError} drawingBufferWidth must be greater than zero.
|
||
|
|
* @exception {DeveloperError} drawingBufferHeight must be greater than zero.
|
||
|
|
* @exception {DeveloperError} pixelRatio must be greater than zero.
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // Example 1
|
||
|
|
* // Get the width and height of a pixel.
|
||
|
|
* var pixelSize = camera.frustum.getPixelDimensions(scene.drawingBufferWidth, scene.drawingBufferHeight, 0.0, scene.pixelRatio, new Cesium.Cartesian2());
|
||
|
|
*/
|
||
|
|
OrthographicFrustum.prototype.getPixelDimensions = function(drawingBufferWidth, drawingBufferHeight, distance, pixelRatio, result) {
|
||
|
|
update$1(this);
|
||
|
|
return this._offCenterFrustum.getPixelDimensions(drawingBufferWidth, drawingBufferHeight, distance, pixelRatio, result);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a duplicate of a OrthographicFrustum instance.
|
||
|
|
*
|
||
|
|
* @param {OrthographicFrustum} [result] The object onto which to store the result.
|
||
|
|
* @returns {OrthographicFrustum} The modified result parameter or a new OrthographicFrustum instance if one was not provided.
|
||
|
|
*/
|
||
|
|
OrthographicFrustum.prototype.clone = function(result) {
|
||
|
|
if (!when.defined(result)) {
|
||
|
|
result = new OrthographicFrustum();
|
||
|
|
}
|
||
|
|
|
||
|
|
result.aspectRatio = this.aspectRatio;
|
||
|
|
result.width = this.width;
|
||
|
|
result.near = this.near;
|
||
|
|
result.far = this.far;
|
||
|
|
|
||
|
|
// force update of clone to compute matrices
|
||
|
|
result._aspectRatio = undefined;
|
||
|
|
result._width = undefined;
|
||
|
|
result._near = undefined;
|
||
|
|
result._far = undefined;
|
||
|
|
|
||
|
|
this._offCenterFrustum.clone(result._offCenterFrustum);
|
||
|
|
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compares the provided OrthographicFrustum componentwise and returns
|
||
|
|
* <code>true</code> if they are equal, <code>false</code> otherwise.
|
||
|
|
*
|
||
|
|
* @param {OrthographicFrustum} [other] The right hand side OrthographicFrustum.
|
||
|
|
* @returns {Boolean} <code>true</code> if they are equal, <code>false</code> otherwise.
|
||
|
|
*/
|
||
|
|
OrthographicFrustum.prototype.equals = function(other) {
|
||
|
|
if (!when.defined(other) || !(other instanceof OrthographicFrustum)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
update$1(this);
|
||
|
|
update$1(other);
|
||
|
|
|
||
|
|
return (this.width === other.width &&
|
||
|
|
this.aspectRatio === other.aspectRatio &&
|
||
|
|
this._offCenterFrustum.equals(other._offCenterFrustum));
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compares the provided OrthographicFrustum componentwise and returns
|
||
|
|
* <code>true</code> if they pass an absolute or relative tolerance test,
|
||
|
|
* <code>false</code> otherwise.
|
||
|
|
*
|
||
|
|
* @param {OrthographicFrustum} other The right hand side OrthographicFrustum.
|
||
|
|
* @param {Number} relativeEpsilon The relative epsilon tolerance to use for equality testing.
|
||
|
|
* @param {Number} [absoluteEpsilon=relativeEpsilon] The absolute epsilon tolerance to use for equality testing.
|
||
|
|
* @returns {Boolean} <code>true</code> if this and other are within the provided epsilon, <code>false</code> otherwise.
|
||
|
|
*/
|
||
|
|
OrthographicFrustum.prototype.equalsEpsilon = function(other, relativeEpsilon, absoluteEpsilon) {
|
||
|
|
if (!when.defined(other) || !(other instanceof OrthographicFrustum)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
update$1(this);
|
||
|
|
update$1(other);
|
||
|
|
|
||
|
|
return (_Math.CesiumMath.equalsEpsilon(this.width, other.width, relativeEpsilon, absoluteEpsilon) &&
|
||
|
|
_Math.CesiumMath.equalsEpsilon(this.aspectRatio, other.aspectRatio, relativeEpsilon, absoluteEpsilon) &&
|
||
|
|
this._offCenterFrustum.equalsEpsilon(other._offCenterFrustum, relativeEpsilon, absoluteEpsilon));
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The viewing frustum is defined by 6 planes.
|
||
|
|
* Each plane is represented by a {@link Cartesian4} object, where the x, y, and z components
|
||
|
|
* define the unit vector normal to the plane, and the w component is the distance of the
|
||
|
|
* plane from the origin/camera position.
|
||
|
|
*
|
||
|
|
* @alias PerspectiveOffCenterFrustum
|
||
|
|
* @constructor
|
||
|
|
*
|
||
|
|
* @param {Object} [options] An object with the following properties:
|
||
|
|
* @param {Number} [options.left] The left clipping plane distance.
|
||
|
|
* @param {Number} [options.right] The right clipping plane distance.
|
||
|
|
* @param {Number} [options.top] The top clipping plane distance.
|
||
|
|
* @param {Number} [options.bottom] The bottom clipping plane distance.
|
||
|
|
* @param {Number} [options.near=1.0] The near clipping plane distance.
|
||
|
|
* @param {Number} [options.far=500000000.0] The far clipping plane distance.
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* var frustum = new Cesium.PerspectiveOffCenterFrustum({
|
||
|
|
* left : -1.0,
|
||
|
|
* right : 1.0,
|
||
|
|
* top : 1.0,
|
||
|
|
* bottom : -1.0,
|
||
|
|
* near : 1.0,
|
||
|
|
* far : 100.0
|
||
|
|
* });
|
||
|
|
*
|
||
|
|
* @see PerspectiveFrustum
|
||
|
|
*/
|
||
|
|
function PerspectiveOffCenterFrustum(options) {
|
||
|
|
options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Defines the left clipping plane.
|
||
|
|
* @type {Number}
|
||
|
|
* @default undefined
|
||
|
|
*/
|
||
|
|
this.left = options.left;
|
||
|
|
this._left = undefined;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Defines the right clipping plane.
|
||
|
|
* @type {Number}
|
||
|
|
* @default undefined
|
||
|
|
*/
|
||
|
|
this.right = options.right;
|
||
|
|
this._right = undefined;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Defines the top clipping plane.
|
||
|
|
* @type {Number}
|
||
|
|
* @default undefined
|
||
|
|
*/
|
||
|
|
this.top = options.top;
|
||
|
|
this._top = undefined;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Defines the bottom clipping plane.
|
||
|
|
* @type {Number}
|
||
|
|
* @default undefined
|
||
|
|
*/
|
||
|
|
this.bottom = options.bottom;
|
||
|
|
this._bottom = undefined;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The distance of the near plane.
|
||
|
|
* @type {Number}
|
||
|
|
* @default 1.0
|
||
|
|
*/
|
||
|
|
this.near = when.defaultValue(options.near, 1.0);
|
||
|
|
this._near = this.near;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The distance of the far plane.
|
||
|
|
* @type {Number}
|
||
|
|
* @default 500000000.0
|
||
|
|
*/
|
||
|
|
this.far = when.defaultValue(options.far, 500000000.0);
|
||
|
|
this._far = this.far;
|
||
|
|
|
||
|
|
this._cullingVolume = new CullingVolume();
|
||
|
|
this._perspectiveMatrix = new BoundingSphere.Matrix4();
|
||
|
|
this._infinitePerspective = new BoundingSphere.Matrix4();
|
||
|
|
}
|
||
|
|
|
||
|
|
function update$2(frustum) {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
if (!when.defined(frustum.right) || !when.defined(frustum.left) ||
|
||
|
|
!when.defined(frustum.top) || !when.defined(frustum.bottom) ||
|
||
|
|
!when.defined(frustum.near) || !when.defined(frustum.far)) {
|
||
|
|
throw new Check.DeveloperError('right, left, top, bottom, near, or far parameters are not set.');
|
||
|
|
}
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
var t = frustum.top;
|
||
|
|
var b = frustum.bottom;
|
||
|
|
var r = frustum.right;
|
||
|
|
var l = frustum.left;
|
||
|
|
var n = frustum.near;
|
||
|
|
var f = frustum.far;
|
||
|
|
|
||
|
|
if (t !== frustum._top || b !== frustum._bottom ||
|
||
|
|
l !== frustum._left || r !== frustum._right ||
|
||
|
|
n !== frustum._near || f !== frustum._far) {
|
||
|
|
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
if (frustum.near <= 0 || frustum.near > frustum.far) {
|
||
|
|
throw new Check.DeveloperError('near must be greater than zero and less than far.');
|
||
|
|
}
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
frustum._left = l;
|
||
|
|
frustum._right = r;
|
||
|
|
frustum._top = t;
|
||
|
|
frustum._bottom = b;
|
||
|
|
frustum._near = n;
|
||
|
|
frustum._far = f;
|
||
|
|
frustum._perspectiveMatrix = BoundingSphere.Matrix4.computePerspectiveOffCenter(l, r, b, t, n, f, frustum._perspectiveMatrix);
|
||
|
|
frustum._infinitePerspective = BoundingSphere.Matrix4.computeInfinitePerspectiveOffCenter(l, r, b, t, n, frustum._infinitePerspective);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
Object.defineProperties(PerspectiveOffCenterFrustum.prototype, {
|
||
|
|
/**
|
||
|
|
* Gets the perspective projection matrix computed from the view frustum.
|
||
|
|
* @memberof PerspectiveOffCenterFrustum.prototype
|
||
|
|
* @type {Matrix4}
|
||
|
|
* @readonly
|
||
|
|
*
|
||
|
|
* @see PerspectiveOffCenterFrustum#infiniteProjectionMatrix
|
||
|
|
*/
|
||
|
|
projectionMatrix : {
|
||
|
|
get : function() {
|
||
|
|
update$2(this);
|
||
|
|
return this._perspectiveMatrix;
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the perspective projection matrix computed from the view frustum with an infinite far plane.
|
||
|
|
* @memberof PerspectiveOffCenterFrustum.prototype
|
||
|
|
* @type {Matrix4}
|
||
|
|
* @readonly
|
||
|
|
*
|
||
|
|
* @see PerspectiveOffCenterFrustum#projectionMatrix
|
||
|
|
*/
|
||
|
|
infiniteProjectionMatrix : {
|
||
|
|
get : function() {
|
||
|
|
update$2(this);
|
||
|
|
return this._infinitePerspective;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
var getPlanesRight$1 = new Cartographic.Cartesian3();
|
||
|
|
var getPlanesNearCenter$1 = new Cartographic.Cartesian3();
|
||
|
|
var getPlanesFarCenter = new Cartographic.Cartesian3();
|
||
|
|
var getPlanesNormal = new Cartographic.Cartesian3();
|
||
|
|
|
||
|
|
PerspectiveOffCenterFrustum.prototype.resetProjectionMatrix = function() {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
if (!when.defined(this.right) || !when.defined(this.left) ||
|
||
|
|
!when.defined(this.top) || !when.defined(this.bottom) ||
|
||
|
|
!when.defined(this.near) || !when.defined(this.far)) {
|
||
|
|
throw new Check.DeveloperError('right, left, top, bottom, near, or far parameters are not set.');
|
||
|
|
}
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
var t = this.top;
|
||
|
|
var b = this.bottom;
|
||
|
|
var r = this.right;
|
||
|
|
var l = this.left;
|
||
|
|
var n = this.near;
|
||
|
|
var f = this.far;
|
||
|
|
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
if (this.near <= 0 || this.near > this.far) {
|
||
|
|
throw new Check.DeveloperError('near must be greater than zero and less than far.');
|
||
|
|
}
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
this._left = l;
|
||
|
|
this._right = r;
|
||
|
|
this._top = t;
|
||
|
|
this._bottom = b;
|
||
|
|
this._near = n;
|
||
|
|
this._far = f;
|
||
|
|
this._perspectiveMatrix = BoundingSphere.Matrix4.computePerspectiveOffCenter(l, r, b, t, n, f, this._perspectiveMatrix);
|
||
|
|
this._infinitePerspective = BoundingSphere.Matrix4.computeInfinitePerspectiveOffCenter(l, r, b, t, n, this._infinitePerspective);
|
||
|
|
};
|
||
|
|
/**
|
||
|
|
* Creates a culling volume for this frustum.
|
||
|
|
*
|
||
|
|
* @param {Cartesian3} position The eye position.
|
||
|
|
* @param {Cartesian3} direction The view direction.
|
||
|
|
* @param {Cartesian3} up The up direction.
|
||
|
|
* @returns {CullingVolume} A culling volume at the given position and orientation.
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // Check if a bounding volume intersects the frustum.
|
||
|
|
* var cullingVolume = frustum.computeCullingVolume(cameraPosition, cameraDirection, cameraUp);
|
||
|
|
* var intersect = cullingVolume.computeVisibility(boundingVolume);
|
||
|
|
*/
|
||
|
|
PerspectiveOffCenterFrustum.prototype.computeCullingVolume = function(position, direction, up) {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
if (!when.defined(position)) {
|
||
|
|
throw new Check.DeveloperError('position is required.');
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!when.defined(direction)) {
|
||
|
|
throw new Check.DeveloperError('direction is required.');
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!when.defined(up)) {
|
||
|
|
throw new Check.DeveloperError('up is required.');
|
||
|
|
}
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
var planes = this._cullingVolume.planes;
|
||
|
|
|
||
|
|
var t = this.top;
|
||
|
|
var b = this.bottom;
|
||
|
|
var r = this.right;
|
||
|
|
var l = this.left;
|
||
|
|
var n = this.near;
|
||
|
|
var f = this.far;
|
||
|
|
|
||
|
|
var right = Cartographic.Cartesian3.cross(direction, up, getPlanesRight$1);
|
||
|
|
|
||
|
|
var nearCenter = getPlanesNearCenter$1;
|
||
|
|
Cartographic.Cartesian3.multiplyByScalar(direction, n, nearCenter);
|
||
|
|
Cartographic.Cartesian3.add(position, nearCenter, nearCenter);
|
||
|
|
|
||
|
|
var farCenter = getPlanesFarCenter;
|
||
|
|
Cartographic.Cartesian3.multiplyByScalar(direction, f, farCenter);
|
||
|
|
Cartographic.Cartesian3.add(position, farCenter, farCenter);
|
||
|
|
|
||
|
|
var normal = getPlanesNormal;
|
||
|
|
|
||
|
|
//Left plane computation
|
||
|
|
Cartographic.Cartesian3.multiplyByScalar(right, l, normal);
|
||
|
|
Cartographic.Cartesian3.add(nearCenter, normal, normal);
|
||
|
|
Cartographic.Cartesian3.subtract(normal, position, normal);
|
||
|
|
Cartographic.Cartesian3.normalize(normal, normal);
|
||
|
|
Cartographic.Cartesian3.cross(normal, up, normal);
|
||
|
|
Cartographic.Cartesian3.normalize(normal, normal);
|
||
|
|
|
||
|
|
var plane = planes[0];
|
||
|
|
if (!when.defined(plane)) {
|
||
|
|
plane = planes[0] = new Cartesian4.Cartesian4();
|
||
|
|
}
|
||
|
|
plane.x = normal.x;
|
||
|
|
plane.y = normal.y;
|
||
|
|
plane.z = normal.z;
|
||
|
|
plane.w = -Cartographic.Cartesian3.dot(normal, position);
|
||
|
|
|
||
|
|
//Right plane computation
|
||
|
|
Cartographic.Cartesian3.multiplyByScalar(right, r, normal);
|
||
|
|
Cartographic.Cartesian3.add(nearCenter, normal, normal);
|
||
|
|
Cartographic.Cartesian3.subtract(normal, position, normal);
|
||
|
|
Cartographic.Cartesian3.cross(up, normal, normal);
|
||
|
|
Cartographic.Cartesian3.normalize(normal, normal);
|
||
|
|
|
||
|
|
plane = planes[1];
|
||
|
|
if (!when.defined(plane)) {
|
||
|
|
plane = planes[1] = new Cartesian4.Cartesian4();
|
||
|
|
}
|
||
|
|
plane.x = normal.x;
|
||
|
|
plane.y = normal.y;
|
||
|
|
plane.z = normal.z;
|
||
|
|
plane.w = -Cartographic.Cartesian3.dot(normal, position);
|
||
|
|
|
||
|
|
//Bottom plane computation
|
||
|
|
Cartographic.Cartesian3.multiplyByScalar(up, b, normal);
|
||
|
|
Cartographic.Cartesian3.add(nearCenter, normal, normal);
|
||
|
|
Cartographic.Cartesian3.subtract(normal, position, normal);
|
||
|
|
Cartographic.Cartesian3.cross(right, normal, normal);
|
||
|
|
Cartographic.Cartesian3.normalize(normal, normal);
|
||
|
|
|
||
|
|
plane = planes[2];
|
||
|
|
if (!when.defined(plane)) {
|
||
|
|
plane = planes[2] = new Cartesian4.Cartesian4();
|
||
|
|
}
|
||
|
|
plane.x = normal.x;
|
||
|
|
plane.y = normal.y;
|
||
|
|
plane.z = normal.z;
|
||
|
|
plane.w = -Cartographic.Cartesian3.dot(normal, position);
|
||
|
|
|
||
|
|
//Top plane computation
|
||
|
|
Cartographic.Cartesian3.multiplyByScalar(up, t, normal);
|
||
|
|
Cartographic.Cartesian3.add(nearCenter, normal, normal);
|
||
|
|
Cartographic.Cartesian3.subtract(normal, position, normal);
|
||
|
|
Cartographic.Cartesian3.cross(normal, right, normal);
|
||
|
|
Cartographic.Cartesian3.normalize(normal, normal);
|
||
|
|
|
||
|
|
plane = planes[3];
|
||
|
|
if (!when.defined(plane)) {
|
||
|
|
plane = planes[3] = new Cartesian4.Cartesian4();
|
||
|
|
}
|
||
|
|
plane.x = normal.x;
|
||
|
|
plane.y = normal.y;
|
||
|
|
plane.z = normal.z;
|
||
|
|
plane.w = -Cartographic.Cartesian3.dot(normal, position);
|
||
|
|
|
||
|
|
//Near plane computation
|
||
|
|
plane = planes[4];
|
||
|
|
if (!when.defined(plane)) {
|
||
|
|
plane = planes[4] = new Cartesian4.Cartesian4();
|
||
|
|
}
|
||
|
|
plane.x = direction.x;
|
||
|
|
plane.y = direction.y;
|
||
|
|
plane.z = direction.z;
|
||
|
|
plane.w = -Cartographic.Cartesian3.dot(direction, nearCenter);
|
||
|
|
|
||
|
|
//Far plane computation
|
||
|
|
Cartographic.Cartesian3.negate(direction, normal);
|
||
|
|
|
||
|
|
plane = planes[5];
|
||
|
|
if (!when.defined(plane)) {
|
||
|
|
plane = planes[5] = new Cartesian4.Cartesian4();
|
||
|
|
}
|
||
|
|
plane.x = normal.x;
|
||
|
|
plane.y = normal.y;
|
||
|
|
plane.z = normal.z;
|
||
|
|
plane.w = -Cartographic.Cartesian3.dot(normal, farCenter);
|
||
|
|
|
||
|
|
return this._cullingVolume;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the pixel's width and height in meters.
|
||
|
|
*
|
||
|
|
* @param {Number} drawingBufferWidth The width of the drawing buffer.
|
||
|
|
* @param {Number} drawingBufferHeight The height of the drawing buffer.
|
||
|
|
* @param {Number} distance The distance to the near plane in meters.
|
||
|
|
* @param {Number} pixelRatio The scaling factor from pixel space to coordinate space.
|
||
|
|
* @param {Cartesian2} result The object onto which to store the result.
|
||
|
|
* @returns {Cartesian2} The modified result parameter or a new instance of {@link Cartesian2} with the pixel's width and height in the x and y properties, respectively.
|
||
|
|
*
|
||
|
|
* @exception {DeveloperError} drawingBufferWidth must be greater than zero.
|
||
|
|
* @exception {DeveloperError} drawingBufferHeight must be greater than zero.
|
||
|
|
* @exception {DeveloperError} pixelRatio must be greater than zero.
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // Example 1
|
||
|
|
* // Get the width and height of a pixel.
|
||
|
|
* var pixelSize = camera.frustum.getPixelDimensions(scene.drawingBufferWidth, scene.drawingBufferHeight, 1.0, scene.pixelRatio, new Cesium.Cartesian2());
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // Example 2
|
||
|
|
* // Get the width and height of a pixel if the near plane was set to 'distance'.
|
||
|
|
* // For example, get the size of a pixel of an image on a billboard.
|
||
|
|
* var position = camera.position;
|
||
|
|
* var direction = camera.direction;
|
||
|
|
* var toCenter = Cesium.Cartesian3.subtract(primitive.boundingVolume.center, position, new Cesium.Cartesian3()); // vector from camera to a primitive
|
||
|
|
* var toCenterProj = Cesium.Cartesian3.multiplyByScalar(direction, Cesium.Cartesian3.dot(direction, toCenter), new Cesium.Cartesian3()); // project vector onto camera direction vector
|
||
|
|
* var distance = Cesium.Cartesian3.magnitude(toCenterProj);
|
||
|
|
* var pixelSize = camera.frustum.getPixelDimensions(scene.drawingBufferWidth, scene.drawingBufferHeight, distance, scene.pixelRatio, new Cesium.Cartesian2());
|
||
|
|
*/
|
||
|
|
PerspectiveOffCenterFrustum.prototype.getPixelDimensions = function(drawingBufferWidth, drawingBufferHeight, distance, pixelRatio, result) {
|
||
|
|
update$2(this);
|
||
|
|
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
if (!when.defined(drawingBufferWidth) || !when.defined(drawingBufferHeight)) {
|
||
|
|
throw new Check.DeveloperError('Both drawingBufferWidth and drawingBufferHeight are required.');
|
||
|
|
}
|
||
|
|
if (drawingBufferWidth <= 0) {
|
||
|
|
throw new Check.DeveloperError('drawingBufferWidth must be greater than zero.');
|
||
|
|
}
|
||
|
|
if (drawingBufferHeight <= 0) {
|
||
|
|
throw new Check.DeveloperError('drawingBufferHeight must be greater than zero.');
|
||
|
|
}
|
||
|
|
if (!when.defined(distance)) {
|
||
|
|
throw new Check.DeveloperError('distance is required.');
|
||
|
|
}
|
||
|
|
if (!when.defined(pixelRatio)) {
|
||
|
|
throw new Check.DeveloperError('pixelRatio is required');
|
||
|
|
}
|
||
|
|
if (pixelRatio <= 0) {
|
||
|
|
throw new Check.DeveloperError('pixelRatio must be greater than zero.');
|
||
|
|
}
|
||
|
|
if (!when.defined(result)) {
|
||
|
|
throw new Check.DeveloperError('A result object is required.');
|
||
|
|
}
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
var inverseNear = 1.0 / this.near;
|
||
|
|
var tanTheta = this.top * inverseNear;
|
||
|
|
var pixelHeight = 2.0 * pixelRatio * distance * tanTheta / drawingBufferHeight;
|
||
|
|
tanTheta = this.right * inverseNear;
|
||
|
|
var pixelWidth = 2.0 * pixelRatio * distance * tanTheta / drawingBufferWidth;
|
||
|
|
|
||
|
|
result.x = pixelWidth;
|
||
|
|
result.y = pixelHeight;
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a duplicate of a PerspectiveOffCenterFrustum instance.
|
||
|
|
*
|
||
|
|
* @param {PerspectiveOffCenterFrustum} [result] The object onto which to store the result.
|
||
|
|
* @returns {PerspectiveOffCenterFrustum} The modified result parameter or a new PerspectiveFrustum instance if one was not provided.
|
||
|
|
*/
|
||
|
|
PerspectiveOffCenterFrustum.prototype.clone = function(result) {
|
||
|
|
if (!when.defined(result)) {
|
||
|
|
result = new PerspectiveOffCenterFrustum();
|
||
|
|
}
|
||
|
|
|
||
|
|
result.right = this.right;
|
||
|
|
result.left = this.left;
|
||
|
|
result.top = this.top;
|
||
|
|
result.bottom = this.bottom;
|
||
|
|
result.near = this.near;
|
||
|
|
result.far = this.far;
|
||
|
|
|
||
|
|
// force update of clone to compute matrices
|
||
|
|
result._left = undefined;
|
||
|
|
result._right = undefined;
|
||
|
|
result._top = undefined;
|
||
|
|
result._bottom = undefined;
|
||
|
|
result._near = undefined;
|
||
|
|
result._far = undefined;
|
||
|
|
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compares the provided PerspectiveOffCenterFrustum componentwise and returns
|
||
|
|
* <code>true</code> if they are equal, <code>false</code> otherwise.
|
||
|
|
*
|
||
|
|
* @param {PerspectiveOffCenterFrustum} [other] The right hand side PerspectiveOffCenterFrustum.
|
||
|
|
* @returns {Boolean} <code>true</code> if they are equal, <code>false</code> otherwise.
|
||
|
|
*/
|
||
|
|
PerspectiveOffCenterFrustum.prototype.equals = function(other) {
|
||
|
|
return (when.defined(other) && other instanceof PerspectiveOffCenterFrustum &&
|
||
|
|
this.right === other.right &&
|
||
|
|
this.left === other.left &&
|
||
|
|
this.top === other.top &&
|
||
|
|
this.bottom === other.bottom &&
|
||
|
|
this.near === other.near &&
|
||
|
|
this.far === other.far);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compares the provided PerspectiveOffCenterFrustum componentwise and returns
|
||
|
|
* <code>true</code> if they pass an absolute or relative tolerance test,
|
||
|
|
* <code>false</code> otherwise.
|
||
|
|
*
|
||
|
|
* @param {PerspectiveOffCenterFrustum} other The right hand side PerspectiveOffCenterFrustum.
|
||
|
|
* @param {Number} relativeEpsilon The relative epsilon tolerance to use for equality testing.
|
||
|
|
* @param {Number} [absoluteEpsilon=relativeEpsilon] The absolute epsilon tolerance to use for equality testing.
|
||
|
|
* @returns {Boolean} <code>true</code> if this and other are within the provided epsilon, <code>false</code> otherwise.
|
||
|
|
*/
|
||
|
|
PerspectiveOffCenterFrustum.prototype.equalsEpsilon = function(other, relativeEpsilon, absoluteEpsilon) {
|
||
|
|
return (other === this) ||
|
||
|
|
(when.defined(other) &&
|
||
|
|
other instanceof PerspectiveOffCenterFrustum &&
|
||
|
|
_Math.CesiumMath.equalsEpsilon(this.right, other.right, relativeEpsilon, absoluteEpsilon) &&
|
||
|
|
_Math.CesiumMath.equalsEpsilon(this.left, other.left, relativeEpsilon, absoluteEpsilon) &&
|
||
|
|
_Math.CesiumMath.equalsEpsilon(this.top, other.top, relativeEpsilon, absoluteEpsilon) &&
|
||
|
|
_Math.CesiumMath.equalsEpsilon(this.bottom, other.bottom, relativeEpsilon, absoluteEpsilon) &&
|
||
|
|
_Math.CesiumMath.equalsEpsilon(this.near, other.near, relativeEpsilon, absoluteEpsilon) &&
|
||
|
|
_Math.CesiumMath.equalsEpsilon(this.far, other.far, relativeEpsilon, absoluteEpsilon));
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The viewing frustum is defined by 6 planes.
|
||
|
|
* Each plane is represented by a {@link Cartesian4} object, where the x, y, and z components
|
||
|
|
* define the unit vector normal to the plane, and the w component is the distance of the
|
||
|
|
* plane from the origin/camera position.
|
||
|
|
*
|
||
|
|
* @alias PerspectiveFrustum
|
||
|
|
* @constructor
|
||
|
|
*
|
||
|
|
* @param {Object} [options] An object with the following properties:
|
||
|
|
* @param {Number} [options.fov] The angle of the field of view (FOV), in radians.
|
||
|
|
* @param {Number} [options.aspectRatio] The aspect ratio of the frustum's width to it's height.
|
||
|
|
* @param {Number} [options.near=1.0] The distance of the near plane.
|
||
|
|
* @param {Number} [options.far=500000000.0] The distance of the far plane.
|
||
|
|
* @param {Number} [options.xOffset=0.0] The offset in the x direction.
|
||
|
|
* @param {Number} [options.yOffset=0.0] The offset in the y direction.
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* var frustum = new Cesium.PerspectiveFrustum({
|
||
|
|
* fov : Cesium.Math.PI_OVER_THREE,
|
||
|
|
* aspectRatio : canvas.clientWidth / canvas.clientHeight
|
||
|
|
* near : 1.0,
|
||
|
|
* far : 1000.0
|
||
|
|
* });
|
||
|
|
*
|
||
|
|
* @see PerspectiveOffCenterFrustum
|
||
|
|
*/
|
||
|
|
function PerspectiveFrustum(options) {
|
||
|
|
options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
|
||
|
|
|
||
|
|
this._offCenterFrustum = new PerspectiveOffCenterFrustum();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The angle of the field of view (FOV), in radians. This angle will be used
|
||
|
|
* as the horizontal FOV if the width is greater than the height, otherwise
|
||
|
|
* it will be the vertical FOV.
|
||
|
|
* @type {Number}
|
||
|
|
* @default undefined
|
||
|
|
*/
|
||
|
|
this.fov = options.fov;
|
||
|
|
this._fov = undefined;
|
||
|
|
this._fovy = undefined;
|
||
|
|
|
||
|
|
this._sseDenominator = undefined;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The aspect ratio of the frustum's width to it's height.
|
||
|
|
* @type {Number}
|
||
|
|
* @default undefined
|
||
|
|
*/
|
||
|
|
this.aspectRatio = options.aspectRatio;
|
||
|
|
this._aspectRatio = undefined;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The distance of the near plane.
|
||
|
|
* @type {Number}
|
||
|
|
* @default 1.0
|
||
|
|
*/
|
||
|
|
this.near = when.defaultValue(options.near, 1.0);
|
||
|
|
this._near = this.near;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The distance of the far plane.
|
||
|
|
* @type {Number}
|
||
|
|
* @default 500000000.0
|
||
|
|
*/
|
||
|
|
this.far = when.defaultValue(options.far, 500000000.0);
|
||
|
|
this._far = this.far;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Offsets the frustum in the x direction.
|
||
|
|
* @type {Number}
|
||
|
|
* @default 0.0
|
||
|
|
*/
|
||
|
|
this.xOffset = when.defaultValue(options.xOffset, 0.0);
|
||
|
|
this._xOffset = this.xOffset;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Offsets the frustum in the y direction.
|
||
|
|
* @type {Number}
|
||
|
|
* @default 0.0
|
||
|
|
*/
|
||
|
|
this.yOffset = when.defaultValue(options.yOffset, 0.0);
|
||
|
|
this._yOffset = this.yOffset;
|
||
|
|
this.reflect = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The number of elements used to pack the object into an array.
|
||
|
|
* @type {Number}
|
||
|
|
*/
|
||
|
|
PerspectiveFrustum.packedLength = 6;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Stores the provided instance into the provided array.
|
||
|
|
*
|
||
|
|
* @param {PerspectiveFrustum} value The value to pack.
|
||
|
|
* @param {Number[]} array The array to pack into.
|
||
|
|
* @param {Number} [startingIndex=0] The index into the array at which to start packing the elements.
|
||
|
|
*
|
||
|
|
* @returns {Number[]} The array that was packed into
|
||
|
|
*/
|
||
|
|
PerspectiveFrustum.pack = function(value, array, startingIndex) {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
Check.Check.typeOf.object('value', value);
|
||
|
|
Check.Check.defined('array', array);
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
startingIndex = when.defaultValue(startingIndex, 0);
|
||
|
|
|
||
|
|
array[startingIndex++] = value.fov;
|
||
|
|
array[startingIndex++] = value.aspectRatio;
|
||
|
|
array[startingIndex++] = value.near;
|
||
|
|
array[startingIndex++] = value.far;
|
||
|
|
array[startingIndex++] = value.xOffset;
|
||
|
|
array[startingIndex] = value.yOffset;
|
||
|
|
|
||
|
|
return array;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Retrieves an instance from a packed array.
|
||
|
|
*
|
||
|
|
* @param {Number[]} array The packed array.
|
||
|
|
* @param {Number} [startingIndex=0] The starting index of the element to be unpacked.
|
||
|
|
* @param {PerspectiveFrustum} [result] The object into which to store the result.
|
||
|
|
* @returns {PerspectiveFrustum} The modified result parameter or a new PerspectiveFrustum instance if one was not provided.
|
||
|
|
*/
|
||
|
|
PerspectiveFrustum.unpack = function(array, startingIndex, result) {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
Check.Check.defined('array', array);
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
startingIndex = when.defaultValue(startingIndex, 0);
|
||
|
|
|
||
|
|
if (!when.defined(result)) {
|
||
|
|
result = new PerspectiveFrustum();
|
||
|
|
}
|
||
|
|
|
||
|
|
result.fov = array[startingIndex++];
|
||
|
|
result.aspectRatio = array[startingIndex++];
|
||
|
|
result.near = array[startingIndex++];
|
||
|
|
result.far = array[startingIndex++];
|
||
|
|
result.xOffset = array[startingIndex++];
|
||
|
|
result.yOffset = array[startingIndex];
|
||
|
|
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
|
||
|
|
function update$3(frustum) {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
if (!when.defined(frustum.fov) || !when.defined(frustum.aspectRatio) || !when.defined(frustum.near) || !when.defined(frustum.far)) {
|
||
|
|
throw new Check.DeveloperError('fov, aspectRatio, near, or far parameters are not set.');
|
||
|
|
}
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
var f = frustum._offCenterFrustum;
|
||
|
|
|
||
|
|
if (frustum.fov !== frustum._fov || frustum.aspectRatio !== frustum._aspectRatio ||
|
||
|
|
frustum.near !== frustum._near || frustum.far !== frustum._far ||
|
||
|
|
frustum.xOffset !== frustum._xOffset || frustum.yOffset !== frustum._yOffset) {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
if (frustum.fov < 0 || frustum.fov >= Math.PI) {
|
||
|
|
throw new Check.DeveloperError('fov must be in the range [0, PI).');
|
||
|
|
}
|
||
|
|
|
||
|
|
if (frustum.aspectRatio < 0) {
|
||
|
|
throw new Check.DeveloperError('aspectRatio must be positive.');
|
||
|
|
}
|
||
|
|
|
||
|
|
if (frustum.near < 0 || frustum.near > frustum.far) {
|
||
|
|
throw new Check.DeveloperError('near must be greater than zero and less than far.');
|
||
|
|
}
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
frustum._aspectRatio = frustum.aspectRatio;
|
||
|
|
frustum._fov = frustum.fov;
|
||
|
|
frustum._fovy = (frustum.aspectRatio <= 1) ? frustum.fov : Math.atan(Math.tan(frustum.fov * 0.5) / frustum.aspectRatio) * 2.0;
|
||
|
|
frustum._near = frustum.near;
|
||
|
|
frustum._far = frustum.far;
|
||
|
|
frustum._sseDenominator = 2.0 * Math.tan(0.5 * frustum._fovy);
|
||
|
|
frustum._xOffset = frustum.xOffset;
|
||
|
|
frustum._yOffset = frustum.yOffset;
|
||
|
|
|
||
|
|
f.top = frustum.near * Math.tan(0.5 * frustum._fovy);
|
||
|
|
f.bottom = -f.top;
|
||
|
|
f.right = frustum.aspectRatio * f.top;
|
||
|
|
f.left = -f.right;
|
||
|
|
f.near = frustum.near;
|
||
|
|
f.far = frustum.far;
|
||
|
|
|
||
|
|
f.right += frustum.xOffset;
|
||
|
|
f.left += frustum.xOffset;
|
||
|
|
f.top += frustum.yOffset;
|
||
|
|
f.bottom += frustum.yOffset;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
Object.defineProperties(PerspectiveFrustum.prototype, {
|
||
|
|
/**
|
||
|
|
* Gets the perspective projection matrix computed from the view frustum.
|
||
|
|
* @memberof PerspectiveFrustum.prototype
|
||
|
|
* @type {Matrix4}
|
||
|
|
* @readonly
|
||
|
|
*
|
||
|
|
* @see PerspectiveFrustum#infiniteProjectionMatrix
|
||
|
|
*/
|
||
|
|
projectionMatrix : {
|
||
|
|
get : function() {
|
||
|
|
update$3(this);
|
||
|
|
if(this.reflect){
|
||
|
|
modifyProjectionMatrix(this);
|
||
|
|
}
|
||
|
|
return this._offCenterFrustum.projectionMatrix;
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The perspective projection matrix computed from the view frustum with an infinite far plane.
|
||
|
|
* @memberof PerspectiveFrustum.prototype
|
||
|
|
* @type {Matrix4}
|
||
|
|
* @readonly
|
||
|
|
*
|
||
|
|
* @see PerspectiveFrustum#projectionMatrix
|
||
|
|
*/
|
||
|
|
infiniteProjectionMatrix : {
|
||
|
|
get : function() {
|
||
|
|
update$3(this);
|
||
|
|
return this._offCenterFrustum.infiniteProjectionMatrix;
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the angle of the vertical field of view, in radians.
|
||
|
|
* @memberof PerspectiveFrustum.prototype
|
||
|
|
* @type {Number}
|
||
|
|
* @readonly
|
||
|
|
* @default undefined
|
||
|
|
*/
|
||
|
|
fovy : {
|
||
|
|
get : function() {
|
||
|
|
update$3(this);
|
||
|
|
return this._fovy;
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @readonly
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
sseDenominator : {
|
||
|
|
get : function () {
|
||
|
|
update$3(this);
|
||
|
|
return this._sseDenominator;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
PerspectiveFrustum.prototype.resetProjectionMatrix = function() {
|
||
|
|
return this._offCenterFrustum.resetProjectionMatrix();
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a culling volume for this frustum.
|
||
|
|
*
|
||
|
|
* @param {Cartesian3} position The eye position.
|
||
|
|
* @param {Cartesian3} direction The view direction.
|
||
|
|
* @param {Cartesian3} up The up direction.
|
||
|
|
* @returns {CullingVolume} A culling volume at the given position and orientation.
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // Check if a bounding volume intersects the frustum.
|
||
|
|
* var cullingVolume = frustum.computeCullingVolume(cameraPosition, cameraDirection, cameraUp);
|
||
|
|
* var intersect = cullingVolume.computeVisibility(boundingVolume);
|
||
|
|
*/
|
||
|
|
PerspectiveFrustum.prototype.computeCullingVolume = function(position, direction, up) {
|
||
|
|
update$3(this);
|
||
|
|
return this._offCenterFrustum.computeCullingVolume(position, direction, up);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the pixel's width and height in meters.
|
||
|
|
*
|
||
|
|
* @param {Number} drawingBufferWidth The width of the drawing buffer.
|
||
|
|
* @param {Number} drawingBufferHeight The height of the drawing buffer.
|
||
|
|
* @param {Number} distance The distance to the near plane in meters.
|
||
|
|
* @param {Number} pixelRatio The scaling factor from pixel space to coordinate space.
|
||
|
|
* @param {Cartesian2} result The object onto which to store the result.
|
||
|
|
* @returns {Cartesian2} The modified result parameter or a new instance of {@link Cartesian2} with the pixel's width and height in the x and y properties, respectively.
|
||
|
|
*
|
||
|
|
* @exception {DeveloperError} drawingBufferWidth must be greater than zero.
|
||
|
|
* @exception {DeveloperError} drawingBufferHeight must be greater than zero.
|
||
|
|
* @exception {DeveloperError} pixelRatio must be greater than zero.
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // Example 1
|
||
|
|
* // Get the width and height of a pixel.
|
||
|
|
* var pixelSize = camera.frustum.getPixelDimensions(scene.drawingBufferWidth, scene.drawingBufferHeight, 1.0, scene.pixelRatio, new Cesium.Cartesian2());
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // Example 2
|
||
|
|
* // Get the width and height of a pixel if the near plane was set to 'distance'.
|
||
|
|
* // For example, get the size of a pixel of an image on a billboard.
|
||
|
|
* var position = camera.position;
|
||
|
|
* var direction = camera.direction;
|
||
|
|
* var toCenter = Cesium.Cartesian3.subtract(primitive.boundingVolume.center, position, new Cesium.Cartesian3()); // vector from camera to a primitive
|
||
|
|
* var toCenterProj = Cesium.Cartesian3.multiplyByScalar(direction, Cesium.Cartesian3.dot(direction, toCenter), new Cesium.Cartesian3()); // project vector onto camera direction vector
|
||
|
|
* var distance = Cesium.Cartesian3.magnitude(toCenterProj);
|
||
|
|
* var pixelSize = camera.frustum.getPixelDimensions(scene.drawingBufferWidth, scene.drawingBufferHeight, distance, scene.pixelRatio, new Cesium.Cartesian2());
|
||
|
|
*/
|
||
|
|
PerspectiveFrustum.prototype.getPixelDimensions = function(drawingBufferWidth, drawingBufferHeight, distance, pixelRatio, result) {
|
||
|
|
update$3(this);
|
||
|
|
return this._offCenterFrustum.getPixelDimensions(drawingBufferWidth, drawingBufferHeight, distance, pixelRatio, result);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a duplicate of a PerspectiveFrustum instance.
|
||
|
|
*
|
||
|
|
* @param {PerspectiveFrustum} [result] The object onto which to store the result.
|
||
|
|
* @returns {PerspectiveFrustum} The modified result parameter or a new PerspectiveFrustum instance if one was not provided.
|
||
|
|
*/
|
||
|
|
PerspectiveFrustum.prototype.clone = function(result) {
|
||
|
|
if (!when.defined(result)) {
|
||
|
|
result = new PerspectiveFrustum();
|
||
|
|
}
|
||
|
|
|
||
|
|
result.aspectRatio = this.aspectRatio;
|
||
|
|
result.fov = this.fov;
|
||
|
|
result.near = this.near;
|
||
|
|
result.far = this.far;
|
||
|
|
result.reflect = this.reflect;
|
||
|
|
result.clipPlane = this.clipPlane;
|
||
|
|
result.currentViewMatrix = this.currentViewMatrix;
|
||
|
|
// force update of clone to compute matrices
|
||
|
|
result._aspectRatio = undefined;
|
||
|
|
result._fov = undefined;
|
||
|
|
result._near = undefined;
|
||
|
|
result._far = undefined;
|
||
|
|
|
||
|
|
this._offCenterFrustum.clone(result._offCenterFrustum);
|
||
|
|
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compares the provided PerspectiveFrustum componentwise and returns
|
||
|
|
* <code>true</code> if they are equal, <code>false</code> otherwise.
|
||
|
|
*
|
||
|
|
* @param {PerspectiveFrustum} [other] The right hand side PerspectiveFrustum.
|
||
|
|
* @returns {Boolean} <code>true</code> if they are equal, <code>false</code> otherwise.
|
||
|
|
*/
|
||
|
|
PerspectiveFrustum.prototype.equals = function(other) {
|
||
|
|
if (!when.defined(other) || !(other instanceof PerspectiveFrustum)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
update$3(this);
|
||
|
|
update$3(other);
|
||
|
|
|
||
|
|
return (this.fov === other.fov &&
|
||
|
|
this.aspectRatio === other.aspectRatio &&
|
||
|
|
this._offCenterFrustum.equals(other._offCenterFrustum));
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compares the provided PerspectiveFrustum componentwise and returns
|
||
|
|
* <code>true</code> if they pass an absolute or relative tolerance test,
|
||
|
|
* <code>false</code> otherwise.
|
||
|
|
*
|
||
|
|
* @param {PerspectiveFrustum} other The right hand side PerspectiveFrustum.
|
||
|
|
* @param {Number} relativeEpsilon The relative epsilon tolerance to use for equality testing.
|
||
|
|
* @param {Number} [absoluteEpsilon=relativeEpsilon] The absolute epsilon tolerance to use for equality testing.
|
||
|
|
* @returns {Boolean} <code>true</code> if this and other are within the provided epsilon, <code>false</code> otherwise.
|
||
|
|
*/
|
||
|
|
PerspectiveFrustum.prototype.equalsEpsilon = function(other, relativeEpsilon, absoluteEpsilon) {
|
||
|
|
if (!when.defined(other) || !(other instanceof PerspectiveFrustum)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
update$3(this);
|
||
|
|
update$3(other);
|
||
|
|
|
||
|
|
return (_Math.CesiumMath.equalsEpsilon(this.fov, other.fov, relativeEpsilon, absoluteEpsilon) &&
|
||
|
|
_Math.CesiumMath.equalsEpsilon(this.aspectRatio, other.aspectRatio, relativeEpsilon, absoluteEpsilon) &&
|
||
|
|
this._offCenterFrustum.equalsEpsilon(other._offCenterFrustum, relativeEpsilon, absoluteEpsilon));
|
||
|
|
};
|
||
|
|
|
||
|
|
var scratchViewPlane = new Plane.Plane(Cartographic.Cartesian3.UNIT_Z, 1.0);
|
||
|
|
var scratchQVec = new Cartesian4.Cartesian4();
|
||
|
|
var scratchClipPlane4d = new Cartesian4.Cartesian4();
|
||
|
|
var scratchResult4 = new Cartesian4.Cartesian4();
|
||
|
|
/**
|
||
|
|
* modify the near clip plane for reflection
|
||
|
|
*/
|
||
|
|
function modifyProjectionMatrix(frustum) {
|
||
|
|
if(!when.defined(frustum.clipPlane) || !when.defined(frustum.currentViewMatrix)){
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
var viewMatrix = frustum.currentViewMatrix;
|
||
|
|
var projectionMatrix = frustum._offCenterFrustum.projectionMatrix;
|
||
|
|
BoundingSphere.Matrix4.multiplyByPlane(viewMatrix, frustum.clipPlane, scratchViewPlane);
|
||
|
|
scratchQVec.x = (_Math.CesiumMath.sign(scratchViewPlane.normal.x) + projectionMatrix[8]) / projectionMatrix[0];
|
||
|
|
scratchQVec.y = (_Math.CesiumMath.sign(scratchViewPlane.normal.y) + projectionMatrix[9]) / projectionMatrix[5];
|
||
|
|
scratchQVec.z = -1.0;
|
||
|
|
scratchQVec.w = (1 + projectionMatrix[10]) / projectionMatrix[14];
|
||
|
|
scratchClipPlane4d.x = scratchViewPlane.normal.x;
|
||
|
|
scratchClipPlane4d.y = scratchViewPlane.normal.y;
|
||
|
|
scratchClipPlane4d.z = scratchViewPlane.normal.z;
|
||
|
|
scratchClipPlane4d.w = scratchViewPlane.distance;
|
||
|
|
Cartesian4.Cartesian4.multiplyByScalar(scratchClipPlane4d, 2.0 / Cartesian4.Cartesian4.dot(scratchClipPlane4d, scratchQVec), scratchResult4);
|
||
|
|
projectionMatrix[2] = scratchResult4.x;
|
||
|
|
projectionMatrix[6] = scratchResult4.y;
|
||
|
|
projectionMatrix[10] = scratchResult4.z + 1.0;
|
||
|
|
projectionMatrix[14] = scratchResult4.w;
|
||
|
|
}
|
||
|
|
|
||
|
|
var PERSPECTIVE = 0;
|
||
|
|
var ORTHOGRAPHIC = 1;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Describes a frustum at the given the origin and orientation.
|
||
|
|
*
|
||
|
|
* @alias FrustumGeometry
|
||
|
|
* @constructor
|
||
|
|
*
|
||
|
|
* @param {Object} options Object with the following properties:
|
||
|
|
* @param {PerspectiveFrustum|OrthographicFrustum} options.frustum The frustum.
|
||
|
|
* @param {Cartesian3} options.origin The origin of the frustum.
|
||
|
|
* @param {Quaternion} options.orientation The orientation of the frustum.
|
||
|
|
* @param {VertexFormat} [options.vertexFormat=VertexFormat.DEFAULT] The vertex attributes to be computed.
|
||
|
|
*/
|
||
|
|
function FrustumGeometry(options) {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
Check.Check.typeOf.object('options', options);
|
||
|
|
Check.Check.typeOf.object('options.frustum', options.frustum);
|
||
|
|
Check.Check.typeOf.object('options.origin', options.origin);
|
||
|
|
Check.Check.typeOf.object('options.orientation', options.orientation);
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
var frustum = options.frustum;
|
||
|
|
var orientation = options.orientation;
|
||
|
|
var origin = options.origin;
|
||
|
|
var vertexFormat = when.defaultValue(options.vertexFormat, VertexFormat.VertexFormat.DEFAULT);
|
||
|
|
|
||
|
|
// This is private because it is used by DebugCameraPrimitive to draw a multi-frustum by
|
||
|
|
// creating multiple FrustumGeometrys. This way the near plane of one frustum doesn't overlap
|
||
|
|
// the far plane of another.
|
||
|
|
var drawNearPlane = when.defaultValue(options._drawNearPlane, true);
|
||
|
|
|
||
|
|
var frustumType;
|
||
|
|
var frustumPackedLength;
|
||
|
|
if (frustum instanceof PerspectiveFrustum) {
|
||
|
|
frustumType = PERSPECTIVE;
|
||
|
|
frustumPackedLength = PerspectiveFrustum.packedLength;
|
||
|
|
} else if (frustum instanceof OrthographicFrustum) {
|
||
|
|
frustumType = ORTHOGRAPHIC;
|
||
|
|
frustumPackedLength = OrthographicFrustum.packedLength;
|
||
|
|
}
|
||
|
|
|
||
|
|
this._frustumType = frustumType;
|
||
|
|
this._frustum = frustum.clone();
|
||
|
|
this._origin = Cartographic.Cartesian3.clone(origin);
|
||
|
|
this._orientation = Transforms.Quaternion.clone(orientation);
|
||
|
|
this._drawNearPlane = drawNearPlane;
|
||
|
|
this._vertexFormat = vertexFormat;
|
||
|
|
this._workerName = 'createFrustumGeometry';
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The number of elements used to pack the object into an array.
|
||
|
|
* @type {Number}
|
||
|
|
*/
|
||
|
|
this.packedLength = 2 + frustumPackedLength + Cartographic.Cartesian3.packedLength + Transforms.Quaternion.packedLength + VertexFormat.VertexFormat.packedLength;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Stores the provided instance into the provided array.
|
||
|
|
*
|
||
|
|
* @param {FrustumGeometry} value The value to pack.
|
||
|
|
* @param {Number[]} array The array to pack into.
|
||
|
|
* @param {Number} [startingIndex=0] The index into the array at which to start packing the elements.
|
||
|
|
*
|
||
|
|
* @returns {Number[]} The array that was packed into
|
||
|
|
*/
|
||
|
|
FrustumGeometry.pack = function(value, array, startingIndex) {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
Check.Check.typeOf.object('value', value);
|
||
|
|
Check.Check.defined('array', array);
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
startingIndex = when.defaultValue(startingIndex, 0);
|
||
|
|
|
||
|
|
var frustumType = value._frustumType;
|
||
|
|
var frustum = value._frustum;
|
||
|
|
|
||
|
|
array[startingIndex++] = frustumType;
|
||
|
|
|
||
|
|
if (frustumType === PERSPECTIVE) {
|
||
|
|
PerspectiveFrustum.pack(frustum, array, startingIndex);
|
||
|
|
startingIndex += PerspectiveFrustum.packedLength;
|
||
|
|
} else {
|
||
|
|
OrthographicFrustum.pack(frustum, array, startingIndex);
|
||
|
|
startingIndex += OrthographicFrustum.packedLength;
|
||
|
|
}
|
||
|
|
|
||
|
|
Cartographic.Cartesian3.pack(value._origin, array, startingIndex);
|
||
|
|
startingIndex += Cartographic.Cartesian3.packedLength;
|
||
|
|
Transforms.Quaternion.pack(value._orientation, array, startingIndex);
|
||
|
|
startingIndex += Transforms.Quaternion.packedLength;
|
||
|
|
VertexFormat.VertexFormat.pack(value._vertexFormat, array, startingIndex);
|
||
|
|
startingIndex += VertexFormat.VertexFormat.packedLength;
|
||
|
|
array[startingIndex] = value._drawNearPlane ? 1.0 : 0.0;
|
||
|
|
|
||
|
|
return array;
|
||
|
|
};
|
||
|
|
|
||
|
|
var scratchPackPerspective = new PerspectiveFrustum();
|
||
|
|
var scratchPackOrthographic = new OrthographicFrustum();
|
||
|
|
var scratchPackQuaternion = new Transforms.Quaternion();
|
||
|
|
var scratchPackorigin = new Cartographic.Cartesian3();
|
||
|
|
var scratchVertexFormat = new VertexFormat.VertexFormat();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Retrieves an instance from a packed array.
|
||
|
|
*
|
||
|
|
* @param {Number[]} array The packed array.
|
||
|
|
* @param {Number} [startingIndex=0] The starting index of the element to be unpacked.
|
||
|
|
* @param {FrustumGeometry} [result] The object into which to store the result.
|
||
|
|
*/
|
||
|
|
FrustumGeometry.unpack = function(array, startingIndex, result) {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
Check.Check.defined('array', array);
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
startingIndex = when.defaultValue(startingIndex, 0);
|
||
|
|
|
||
|
|
var frustumType = array[startingIndex++];
|
||
|
|
|
||
|
|
var frustum;
|
||
|
|
if (frustumType === PERSPECTIVE) {
|
||
|
|
frustum = PerspectiveFrustum.unpack(array, startingIndex, scratchPackPerspective);
|
||
|
|
startingIndex += PerspectiveFrustum.packedLength;
|
||
|
|
} else {
|
||
|
|
frustum = OrthographicFrustum.unpack(array, startingIndex, scratchPackOrthographic);
|
||
|
|
startingIndex += OrthographicFrustum.packedLength;
|
||
|
|
}
|
||
|
|
|
||
|
|
var origin = Cartographic.Cartesian3.unpack(array, startingIndex, scratchPackorigin);
|
||
|
|
startingIndex += Cartographic.Cartesian3.packedLength;
|
||
|
|
var orientation = Transforms.Quaternion.unpack(array, startingIndex, scratchPackQuaternion);
|
||
|
|
startingIndex += Transforms.Quaternion.packedLength;
|
||
|
|
var vertexFormat = VertexFormat.VertexFormat.unpack(array, startingIndex, scratchVertexFormat);
|
||
|
|
startingIndex += VertexFormat.VertexFormat.packedLength;
|
||
|
|
var drawNearPlane = array[startingIndex] === 1.0;
|
||
|
|
|
||
|
|
if (!when.defined(result)) {
|
||
|
|
return new FrustumGeometry({
|
||
|
|
frustum : frustum,
|
||
|
|
origin : origin,
|
||
|
|
orientation : orientation,
|
||
|
|
vertexFormat : vertexFormat,
|
||
|
|
_drawNearPlane : drawNearPlane
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
var frustumResult = frustumType === result._frustumType ? result._frustum : undefined;
|
||
|
|
result._frustum = frustum.clone(frustumResult);
|
||
|
|
|
||
|
|
result._frustumType = frustumType;
|
||
|
|
result._origin = Cartographic.Cartesian3.clone(origin, result._origin);
|
||
|
|
result._orientation = Transforms.Quaternion.clone(orientation, result._orientation);
|
||
|
|
result._vertexFormat = VertexFormat.VertexFormat.clone(vertexFormat, result._vertexFormat);
|
||
|
|
result._drawNearPlane = drawNearPlane;
|
||
|
|
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
|
||
|
|
function getAttributes(offset, normals, tangents, bitangents, st, normal, tangent, bitangent) {
|
||
|
|
var stOffset = offset / 3 * 2;
|
||
|
|
|
||
|
|
for (var i = 0; i < 4; ++i) {
|
||
|
|
if (when.defined(normals)) {
|
||
|
|
normals[offset] = normal.x;
|
||
|
|
normals[offset + 1] = normal.y;
|
||
|
|
normals[offset + 2] = normal.z;
|
||
|
|
}
|
||
|
|
if (when.defined(tangents)) {
|
||
|
|
tangents[offset] = tangent.x;
|
||
|
|
tangents[offset + 1] = tangent.y;
|
||
|
|
tangents[offset + 2] = tangent.z;
|
||
|
|
}
|
||
|
|
if (when.defined(bitangents)) {
|
||
|
|
bitangents[offset] = bitangent.x;
|
||
|
|
bitangents[offset + 1] = bitangent.y;
|
||
|
|
bitangents[offset + 2] = bitangent.z;
|
||
|
|
}
|
||
|
|
offset += 3;
|
||
|
|
}
|
||
|
|
|
||
|
|
st[stOffset] = 0.0;
|
||
|
|
st[stOffset + 1] = 0.0;
|
||
|
|
st[stOffset + 2] = 1.0;
|
||
|
|
st[stOffset + 3] = 0.0;
|
||
|
|
st[stOffset + 4] = 1.0;
|
||
|
|
st[stOffset + 5] = 1.0;
|
||
|
|
st[stOffset + 6] = 0.0;
|
||
|
|
st[stOffset + 7] = 1.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
var scratchRotationMatrix = new BoundingSphere.Matrix3();
|
||
|
|
var scratchViewMatrix = new BoundingSphere.Matrix4();
|
||
|
|
var scratchInverseMatrix = new BoundingSphere.Matrix4();
|
||
|
|
|
||
|
|
var scratchXDirection = new Cartographic.Cartesian3();
|
||
|
|
var scratchYDirection = new Cartographic.Cartesian3();
|
||
|
|
var scratchZDirection = new Cartographic.Cartesian3();
|
||
|
|
var scratchNegativeX = new Cartographic.Cartesian3();
|
||
|
|
var scratchNegativeY = new Cartographic.Cartesian3();
|
||
|
|
var scratchNegativeZ = new Cartographic.Cartesian3();
|
||
|
|
|
||
|
|
var frustumSplits = new Array(3);
|
||
|
|
|
||
|
|
var frustumCornersNDC = new Array(4);
|
||
|
|
frustumCornersNDC[0] = new Cartesian4.Cartesian4(-1.0, -1.0, 1.0, 1.0);
|
||
|
|
frustumCornersNDC[1] = new Cartesian4.Cartesian4(1.0, -1.0, 1.0, 1.0);
|
||
|
|
frustumCornersNDC[2] = new Cartesian4.Cartesian4(1.0, 1.0, 1.0, 1.0);
|
||
|
|
frustumCornersNDC[3] = new Cartesian4.Cartesian4(-1.0, 1.0, 1.0, 1.0);
|
||
|
|
|
||
|
|
var scratchFrustumCorners = new Array(4);
|
||
|
|
for (var i = 0; i < 4; ++i) {
|
||
|
|
scratchFrustumCorners[i] = new Cartesian4.Cartesian4();
|
||
|
|
}
|
||
|
|
|
||
|
|
FrustumGeometry._computeNearFarPlanes = function(origin, orientation, frustumType, frustum, positions, xDirection, yDirection, zDirection) {
|
||
|
|
var rotationMatrix = BoundingSphere.Matrix3.fromQuaternion(orientation, scratchRotationMatrix);
|
||
|
|
var x = when.defaultValue(xDirection, scratchXDirection);
|
||
|
|
var y = when.defaultValue(yDirection, scratchYDirection);
|
||
|
|
var z = when.defaultValue(zDirection, scratchZDirection);
|
||
|
|
|
||
|
|
x = BoundingSphere.Matrix3.getColumn(rotationMatrix, 0, x);
|
||
|
|
y = BoundingSphere.Matrix3.getColumn(rotationMatrix, 1, y);
|
||
|
|
z = BoundingSphere.Matrix3.getColumn(rotationMatrix, 2, z);
|
||
|
|
|
||
|
|
Cartographic.Cartesian3.normalize(x, x);
|
||
|
|
Cartographic.Cartesian3.normalize(y, y);
|
||
|
|
Cartographic.Cartesian3.normalize(z, z);
|
||
|
|
|
||
|
|
Cartographic.Cartesian3.negate(x, x);
|
||
|
|
|
||
|
|
var view = BoundingSphere.Matrix4.computeView(origin, z, y, x, scratchViewMatrix);
|
||
|
|
|
||
|
|
var inverseView;
|
||
|
|
var inverseViewProjection;
|
||
|
|
if (frustumType === PERSPECTIVE) {
|
||
|
|
var projection = frustum.projectionMatrix;
|
||
|
|
var viewProjection = BoundingSphere.Matrix4.multiply(projection, view, scratchInverseMatrix);
|
||
|
|
inverseViewProjection = BoundingSphere.Matrix4.inverse(viewProjection, scratchInverseMatrix);
|
||
|
|
} else {
|
||
|
|
inverseView = BoundingSphere.Matrix4.inverseTransformation(view, scratchInverseMatrix);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (when.defined(inverseViewProjection)) {
|
||
|
|
frustumSplits[0] = frustum.near;
|
||
|
|
frustumSplits[1] = frustum.far;
|
||
|
|
} else {
|
||
|
|
frustumSplits[0] = 0.0;
|
||
|
|
frustumSplits[1] = frustum.near;
|
||
|
|
frustumSplits[2] = frustum.far;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (var i = 0; i < 2; ++i) {
|
||
|
|
for (var j = 0; j < 4; ++j) {
|
||
|
|
var corner = Cartesian4.Cartesian4.clone(frustumCornersNDC[j], scratchFrustumCorners[j]);
|
||
|
|
|
||
|
|
if (!when.defined(inverseViewProjection)) {
|
||
|
|
if (when.defined(frustum._offCenterFrustum)) {
|
||
|
|
frustum = frustum._offCenterFrustum;
|
||
|
|
}
|
||
|
|
|
||
|
|
var near = frustumSplits[i];
|
||
|
|
var far = frustumSplits[i + 1];
|
||
|
|
|
||
|
|
corner.x = (corner.x * (frustum.right - frustum.left) + frustum.left + frustum.right) * 0.5;
|
||
|
|
corner.y = (corner.y * (frustum.top - frustum.bottom) + frustum.bottom + frustum.top) * 0.5;
|
||
|
|
corner.z = (corner.z * (near - far) - near - far) * 0.5;
|
||
|
|
corner.w = 1.0;
|
||
|
|
|
||
|
|
BoundingSphere.Matrix4.multiplyByVector(inverseView, corner, corner);
|
||
|
|
} else {
|
||
|
|
corner = BoundingSphere.Matrix4.multiplyByVector(inverseViewProjection, corner, corner);
|
||
|
|
|
||
|
|
// Reverse perspective divide
|
||
|
|
var w = 1.0 / corner.w;
|
||
|
|
Cartographic.Cartesian3.multiplyByScalar(corner, w, corner);
|
||
|
|
|
||
|
|
Cartographic.Cartesian3.subtract(corner, origin, corner);
|
||
|
|
Cartographic.Cartesian3.normalize(corner, corner);
|
||
|
|
|
||
|
|
var fac = Cartographic.Cartesian3.dot(z, corner);
|
||
|
|
Cartographic.Cartesian3.multiplyByScalar(corner, frustumSplits[i] / fac, corner);
|
||
|
|
Cartographic.Cartesian3.add(corner, origin, corner);
|
||
|
|
}
|
||
|
|
|
||
|
|
positions[12 * i + j * 3] = corner.x;
|
||
|
|
positions[12 * i + j * 3 + 1] = corner.y;
|
||
|
|
positions[12 * i + j * 3 + 2] = corner.z;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Computes the geometric representation of a frustum, including its vertices, indices, and a bounding sphere.
|
||
|
|
*
|
||
|
|
* @param {FrustumGeometry} frustumGeometry A description of the frustum.
|
||
|
|
* @returns {Geometry|undefined} The computed vertices and indices.
|
||
|
|
*/
|
||
|
|
FrustumGeometry.createGeometry = function(frustumGeometry) {
|
||
|
|
var frustumType = frustumGeometry._frustumType;
|
||
|
|
var frustum = frustumGeometry._frustum;
|
||
|
|
var origin = frustumGeometry._origin;
|
||
|
|
var orientation = frustumGeometry._orientation;
|
||
|
|
var drawNearPlane = frustumGeometry._drawNearPlane;
|
||
|
|
var vertexFormat = frustumGeometry._vertexFormat;
|
||
|
|
|
||
|
|
var numberOfPlanes = drawNearPlane ? 6 : 5;
|
||
|
|
var positions = new Float64Array(3 * 4 * 6);
|
||
|
|
FrustumGeometry._computeNearFarPlanes(origin, orientation, frustumType, frustum, positions);
|
||
|
|
|
||
|
|
// -x plane
|
||
|
|
var offset = 3 * 4 * 2;
|
||
|
|
positions[offset] = positions[3 * 4];
|
||
|
|
positions[offset + 1] = positions[3 * 4 + 1];
|
||
|
|
positions[offset + 2] = positions[3 * 4 + 2];
|
||
|
|
positions[offset + 3] = positions[0];
|
||
|
|
positions[offset + 4] = positions[1];
|
||
|
|
positions[offset + 5] = positions[2];
|
||
|
|
positions[offset + 6] = positions[3 * 3];
|
||
|
|
positions[offset + 7] = positions[3 * 3 + 1];
|
||
|
|
positions[offset + 8] = positions[3 * 3 + 2];
|
||
|
|
positions[offset + 9] = positions[3 * 7];
|
||
|
|
positions[offset + 10] = positions[3 * 7 + 1];
|
||
|
|
positions[offset + 11] = positions[3 * 7 + 2];
|
||
|
|
|
||
|
|
// -y plane
|
||
|
|
offset += 3 * 4;
|
||
|
|
positions[offset] = positions[3 * 5];
|
||
|
|
positions[offset + 1] = positions[3 * 5 + 1];
|
||
|
|
positions[offset + 2] = positions[3 * 5 + 2];
|
||
|
|
positions[offset + 3] = positions[3];
|
||
|
|
positions[offset + 4] = positions[3 + 1];
|
||
|
|
positions[offset + 5] = positions[3 + 2];
|
||
|
|
positions[offset + 6] = positions[0];
|
||
|
|
positions[offset + 7] = positions[1];
|
||
|
|
positions[offset + 8] = positions[2];
|
||
|
|
positions[offset + 9] = positions[3 * 4];
|
||
|
|
positions[offset + 10] = positions[3 * 4 + 1];
|
||
|
|
positions[offset + 11] = positions[3 * 4 + 2];
|
||
|
|
|
||
|
|
// +x plane
|
||
|
|
offset += 3 * 4;
|
||
|
|
positions[offset] = positions[3];
|
||
|
|
positions[offset + 1] = positions[3 + 1];
|
||
|
|
positions[offset + 2] = positions[3 + 2];
|
||
|
|
positions[offset + 3] = positions[3 * 5];
|
||
|
|
positions[offset + 4] = positions[3 * 5 + 1];
|
||
|
|
positions[offset + 5] = positions[3 * 5 + 2];
|
||
|
|
positions[offset + 6] = positions[3 * 6];
|
||
|
|
positions[offset + 7] = positions[3 * 6 + 1];
|
||
|
|
positions[offset + 8] = positions[3 * 6 + 2];
|
||
|
|
positions[offset + 9] = positions[3 * 2];
|
||
|
|
positions[offset + 10] = positions[3 * 2 + 1];
|
||
|
|
positions[offset + 11] = positions[3 * 2 + 2];
|
||
|
|
|
||
|
|
// +y plane
|
||
|
|
offset += 3 * 4;
|
||
|
|
positions[offset] = positions[3 * 2];
|
||
|
|
positions[offset + 1] = positions[3 * 2 + 1];
|
||
|
|
positions[offset + 2] = positions[3 * 2 + 2];
|
||
|
|
positions[offset + 3] = positions[3 * 6];
|
||
|
|
positions[offset + 4] = positions[3 * 6 + 1];
|
||
|
|
positions[offset + 5] = positions[3 * 6 + 2];
|
||
|
|
positions[offset + 6] = positions[3 * 7];
|
||
|
|
positions[offset + 7] = positions[3 * 7 + 1];
|
||
|
|
positions[offset + 8] = positions[3 * 7 + 2];
|
||
|
|
positions[offset + 9] = positions[3 * 3];
|
||
|
|
positions[offset + 10] = positions[3 * 3 + 1];
|
||
|
|
positions[offset + 11] = positions[3 * 3 + 2];
|
||
|
|
|
||
|
|
if (!drawNearPlane) {
|
||
|
|
positions = positions.subarray(3 * 4);
|
||
|
|
}
|
||
|
|
|
||
|
|
var attributes = new GeometryAttributes.GeometryAttributes({
|
||
|
|
position : new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.DOUBLE,
|
||
|
|
componentsPerAttribute : 3,
|
||
|
|
values : positions
|
||
|
|
})
|
||
|
|
});
|
||
|
|
|
||
|
|
if (when.defined(vertexFormat.normal) || when.defined(vertexFormat.tangent) || when.defined(vertexFormat.bitangent) || when.defined(vertexFormat.st)) {
|
||
|
|
var normals = when.defined(vertexFormat.normal) ? new Float32Array(3 * 4 * numberOfPlanes) : undefined;
|
||
|
|
var tangents = when.defined(vertexFormat.tangent) ? new Float32Array(3 * 4 * numberOfPlanes) : undefined;
|
||
|
|
var bitangents = when.defined(vertexFormat.bitangent) ? new Float32Array(3 * 4 * numberOfPlanes) : undefined;
|
||
|
|
var st = when.defined(vertexFormat.st) ? new Float32Array(2 * 4 * numberOfPlanes) : undefined;
|
||
|
|
|
||
|
|
var x = scratchXDirection;
|
||
|
|
var y = scratchYDirection;
|
||
|
|
var z = scratchZDirection;
|
||
|
|
|
||
|
|
var negativeX = Cartographic.Cartesian3.negate(x, scratchNegativeX);
|
||
|
|
var negativeY = Cartographic.Cartesian3.negate(y, scratchNegativeY);
|
||
|
|
var negativeZ = Cartographic.Cartesian3.negate(z, scratchNegativeZ);
|
||
|
|
|
||
|
|
offset = 0;
|
||
|
|
if (drawNearPlane) {
|
||
|
|
getAttributes(offset, normals, tangents, bitangents, st, negativeZ, x, y); // near
|
||
|
|
offset += 3 * 4;
|
||
|
|
}
|
||
|
|
getAttributes(offset, normals, tangents, bitangents, st, z, negativeX, y); // far
|
||
|
|
offset += 3 * 4;
|
||
|
|
getAttributes(offset, normals, tangents, bitangents, st, negativeX, negativeZ, y); // -x
|
||
|
|
offset += 3 * 4;
|
||
|
|
getAttributes(offset, normals, tangents, bitangents, st, negativeY, negativeZ, negativeX); // -y
|
||
|
|
offset += 3 * 4;
|
||
|
|
getAttributes(offset, normals, tangents, bitangents, st, x, z, y); // +x
|
||
|
|
offset += 3 * 4;
|
||
|
|
getAttributes(offset, normals, tangents, bitangents, st, y, z, negativeX); // +y
|
||
|
|
|
||
|
|
if (when.defined(normals)) {
|
||
|
|
attributes.normal = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.FLOAT,
|
||
|
|
componentsPerAttribute : 3,
|
||
|
|
values : normals
|
||
|
|
});
|
||
|
|
}
|
||
|
|
if (when.defined(tangents)) {
|
||
|
|
attributes.tangent = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.FLOAT,
|
||
|
|
componentsPerAttribute : 3,
|
||
|
|
values : tangents
|
||
|
|
});
|
||
|
|
}
|
||
|
|
if (when.defined(bitangents)) {
|
||
|
|
attributes.bitangent = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.FLOAT,
|
||
|
|
componentsPerAttribute : 3,
|
||
|
|
values : bitangents
|
||
|
|
});
|
||
|
|
}
|
||
|
|
if (when.defined(st)) {
|
||
|
|
attributes.st = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.FLOAT,
|
||
|
|
componentsPerAttribute : 2,
|
||
|
|
values : st
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var indices = new Uint16Array(6 * numberOfPlanes);
|
||
|
|
for (var i = 0; i < numberOfPlanes; ++i) {
|
||
|
|
var indexOffset = i * 6;
|
||
|
|
var index = i * 4;
|
||
|
|
|
||
|
|
indices[indexOffset] = index;
|
||
|
|
indices[indexOffset + 1] = index + 1;
|
||
|
|
indices[indexOffset + 2] = index + 2;
|
||
|
|
indices[indexOffset + 3] = index;
|
||
|
|
indices[indexOffset + 4] = index + 2;
|
||
|
|
indices[indexOffset + 5] = index + 3;
|
||
|
|
}
|
||
|
|
|
||
|
|
return new GeometryAttribute.Geometry({
|
||
|
|
attributes : attributes,
|
||
|
|
indices : indices,
|
||
|
|
primitiveType : PrimitiveType.PrimitiveType.TRIANGLES,
|
||
|
|
boundingSphere : BoundingSphere.BoundingSphere.fromVertices(positions)
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.FrustumGeometry = FrustumGeometry;
|
||
|
|
exports.OrthographicFrustum = OrthographicFrustum;
|
||
|
|
exports.PerspectiveFrustum = PerspectiveFrustum;
|
||
|
|
|
||
|
|
});
|