1074 lines
52 KiB
JavaScript
1074 lines
52 KiB
JavaScript
|
/**
|
||
|
|
* Cesium - https://github.com/CesiumGS/cesium
|
||
|
|
*
|
||
|
|
* Copyright 2011-2020 Cesium Contributors
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*
|
||
|
|
* Columbus View (Pat. Pend.)
|
||
|
|
*
|
||
|
|
* Portions licensed separately.
|
||
|
|
* See https://github.com/CesiumGS/cesium/blob/master/LICENSE.md for full licensing details.
|
||
|
|
*/
|
||
|
|
define(['exports', './when-8d13db60', './Check-70bec281', './Math-61ede240', './Cartographic-f2a06374', './Cartesian2-16a61632', './BoundingSphere-d018a565', './ComponentDatatype-5862616f', './GeometryAttribute-773da12d', './PrimitiveType-97893bc7', './Transforms-f77c92da', './GeometryAttributes-aacecde6', './GeometryPipeline-cbdfe22f', './IndexDatatype-9435b55f', './arrayFill-9766fb2e', './GeometryOffsetAttribute-999fc023', './VertexFormat-fe4db402', './EllipseGeometryLibrary-fbc85a33', './GeometryInstance-e632d44a'], function (exports, when, Check, _Math, Cartographic, Cartesian2, BoundingSphere, ComponentDatatype, GeometryAttribute, PrimitiveType, Transforms, GeometryAttributes, GeometryPipeline, IndexDatatype, arrayFill, GeometryOffsetAttribute, VertexFormat, EllipseGeometryLibrary, GeometryInstance) { 'use strict';
|
||
|
|
|
||
|
|
var scratchCartesian1 = new Cartographic.Cartesian3();
|
||
|
|
var scratchCartesian2 = new Cartographic.Cartesian3();
|
||
|
|
var scratchCartesian3 = new Cartographic.Cartesian3();
|
||
|
|
var scratchCartesian4 = new Cartographic.Cartesian3();
|
||
|
|
var texCoordScratch = new Cartesian2.Cartesian2();
|
||
|
|
var textureMatrixScratch = new BoundingSphere.Matrix3();
|
||
|
|
var tangentMatrixScratch = new BoundingSphere.Matrix3();
|
||
|
|
var quaternionScratch = new Transforms.Quaternion();
|
||
|
|
|
||
|
|
var scratchNormal = new Cartographic.Cartesian3();
|
||
|
|
var scratchTangent = new Cartographic.Cartesian3();
|
||
|
|
var scratchBitangent = new Cartographic.Cartesian3();
|
||
|
|
|
||
|
|
var scratchCartographic = new Cartographic.Cartographic();
|
||
|
|
var projectedCenterScratch = new Cartographic.Cartesian3();
|
||
|
|
|
||
|
|
var scratchMinTexCoord = new Cartesian2.Cartesian2();
|
||
|
|
var scratchMaxTexCoord = new Cartesian2.Cartesian2();
|
||
|
|
|
||
|
|
function computeTopBottomAttributes(positions, options, extrude) {
|
||
|
|
var vertexFormat = options.vertexFormat;
|
||
|
|
var center = options.center;
|
||
|
|
var semiMajorAxis = options.semiMajorAxis;
|
||
|
|
var semiMinorAxis = options.semiMinorAxis;
|
||
|
|
var ellipsoid = options.ellipsoid;
|
||
|
|
var stRotation = options.stRotation;
|
||
|
|
var size = (extrude) ? positions.length / 3 * 2 : positions.length / 3;
|
||
|
|
var shadowVolume = options.shadowVolume;
|
||
|
|
|
||
|
|
var textureCoordinates = (vertexFormat.st) ? new Float32Array(size * 2) : undefined;
|
||
|
|
var normals = (vertexFormat.normal) ? new Float32Array(size * 3) : undefined;
|
||
|
|
var tangents = (vertexFormat.tangent) ? new Float32Array(size * 3) : undefined;
|
||
|
|
var bitangents = (vertexFormat.bitangent) ? new Float32Array(size * 3) : undefined;
|
||
|
|
|
||
|
|
var extrudeNormals = (shadowVolume) ? new Float32Array(size * 3) : undefined;
|
||
|
|
|
||
|
|
var textureCoordIndex = 0;
|
||
|
|
|
||
|
|
// Raise positions to a height above the ellipsoid and compute the
|
||
|
|
// texture coordinates, normals, tangents, and bitangents.
|
||
|
|
var normal = scratchNormal;
|
||
|
|
var tangent = scratchTangent;
|
||
|
|
var bitangent = scratchBitangent;
|
||
|
|
|
||
|
|
var projection = new BoundingSphere.GeographicProjection(ellipsoid);
|
||
|
|
var projectedCenter = projection.project(ellipsoid.cartesianToCartographic(center, scratchCartographic), projectedCenterScratch);
|
||
|
|
|
||
|
|
var geodeticNormal = ellipsoid.scaleToGeodeticSurface(center, scratchCartesian1);
|
||
|
|
ellipsoid.geodeticSurfaceNormal(geodeticNormal, geodeticNormal);
|
||
|
|
|
||
|
|
var textureMatrix = textureMatrixScratch;
|
||
|
|
var tangentMatrix = tangentMatrixScratch;
|
||
|
|
if (stRotation !== 0) {
|
||
|
|
var rotation = Transforms.Quaternion.fromAxisAngle(geodeticNormal, stRotation, quaternionScratch);
|
||
|
|
textureMatrix = BoundingSphere.Matrix3.fromQuaternion(rotation, textureMatrix);
|
||
|
|
|
||
|
|
rotation = Transforms.Quaternion.fromAxisAngle(geodeticNormal, -stRotation, quaternionScratch);
|
||
|
|
tangentMatrix = BoundingSphere.Matrix3.fromQuaternion(rotation, tangentMatrix);
|
||
|
|
} else {
|
||
|
|
textureMatrix = BoundingSphere.Matrix3.clone(BoundingSphere.Matrix3.IDENTITY, textureMatrix);
|
||
|
|
tangentMatrix = BoundingSphere.Matrix3.clone(BoundingSphere.Matrix3.IDENTITY, tangentMatrix);
|
||
|
|
}
|
||
|
|
|
||
|
|
var minTexCoord = Cartesian2.Cartesian2.fromElements(Number.POSITIVE_INFINITY, Number.POSITIVE_INFINITY, scratchMinTexCoord);
|
||
|
|
var maxTexCoord = Cartesian2.Cartesian2.fromElements(Number.NEGATIVE_INFINITY, Number.NEGATIVE_INFINITY, scratchMaxTexCoord);
|
||
|
|
|
||
|
|
var length = positions.length;
|
||
|
|
var bottomOffset = (extrude) ? length : 0;
|
||
|
|
var stOffset = bottomOffset / 3 * 2;
|
||
|
|
for (var i = 0; i < length; i += 3) {
|
||
|
|
var i1 = i + 1;
|
||
|
|
var i2 = i + 2;
|
||
|
|
var position = Cartographic.Cartesian3.fromArray(positions, i, scratchCartesian1);
|
||
|
|
|
||
|
|
if (vertexFormat.st) {
|
||
|
|
var rotatedPoint = BoundingSphere.Matrix3.multiplyByVector(textureMatrix, position, scratchCartesian2);
|
||
|
|
var projectedPoint = projection.project(ellipsoid.cartesianToCartographic(rotatedPoint, scratchCartographic), scratchCartesian3);
|
||
|
|
Cartographic.Cartesian3.subtract(projectedPoint, projectedCenter, projectedPoint);
|
||
|
|
|
||
|
|
texCoordScratch.x = (projectedPoint.x + semiMajorAxis) / (2.0 * semiMajorAxis);
|
||
|
|
texCoordScratch.y = (projectedPoint.y + semiMinorAxis) / (2.0 * semiMinorAxis);
|
||
|
|
|
||
|
|
minTexCoord.x = Math.min(texCoordScratch.x, minTexCoord.x);
|
||
|
|
minTexCoord.y = Math.min(texCoordScratch.y, minTexCoord.y);
|
||
|
|
maxTexCoord.x = Math.max(texCoordScratch.x, maxTexCoord.x);
|
||
|
|
maxTexCoord.y = Math.max(texCoordScratch.y, maxTexCoord.y);
|
||
|
|
|
||
|
|
if (extrude) {
|
||
|
|
textureCoordinates[textureCoordIndex + stOffset] = texCoordScratch.x;
|
||
|
|
textureCoordinates[textureCoordIndex + 1 + stOffset] = texCoordScratch.y;
|
||
|
|
}
|
||
|
|
|
||
|
|
textureCoordinates[textureCoordIndex++] = texCoordScratch.x;
|
||
|
|
textureCoordinates[textureCoordIndex++] = texCoordScratch.y;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.normal || vertexFormat.tangent || vertexFormat.bitangent || shadowVolume) {
|
||
|
|
normal = ellipsoid.geodeticSurfaceNormal(position, normal);
|
||
|
|
|
||
|
|
if (shadowVolume) {
|
||
|
|
extrudeNormals[i + bottomOffset] = -normal.x;
|
||
|
|
extrudeNormals[i1 + bottomOffset] = -normal.y;
|
||
|
|
extrudeNormals[i2 + bottomOffset] = -normal.z;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.normal || vertexFormat.tangent || vertexFormat.bitangent) {
|
||
|
|
if (vertexFormat.tangent || vertexFormat.bitangent) {
|
||
|
|
tangent = Cartographic.Cartesian3.normalize(Cartographic.Cartesian3.cross(Cartographic.Cartesian3.UNIT_Z, normal, tangent), tangent);
|
||
|
|
BoundingSphere.Matrix3.multiplyByVector(tangentMatrix, tangent, tangent);
|
||
|
|
}
|
||
|
|
if (vertexFormat.normal) {
|
||
|
|
normals[i] = normal.x;
|
||
|
|
normals[i1] = normal.y;
|
||
|
|
normals[i2] = normal.z;
|
||
|
|
if (extrude) {
|
||
|
|
normals[i + bottomOffset] = -normal.x;
|
||
|
|
normals[i1 + bottomOffset] = -normal.y;
|
||
|
|
normals[i2 + bottomOffset] = -normal.z;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.tangent) {
|
||
|
|
tangents[i] = tangent.x;
|
||
|
|
tangents[i1] = tangent.y;
|
||
|
|
tangents[i2] = tangent.z;
|
||
|
|
if (extrude) {
|
||
|
|
tangents[i + bottomOffset] = -tangent.x;
|
||
|
|
tangents[i1 + bottomOffset] = -tangent.y;
|
||
|
|
tangents[i2 + bottomOffset] = -tangent.z;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.bitangent) {
|
||
|
|
bitangent = Cartographic.Cartesian3.normalize(Cartographic.Cartesian3.cross(normal, tangent, bitangent), bitangent);
|
||
|
|
bitangents[i ] = bitangent.x;
|
||
|
|
bitangents[i1] = bitangent.y;
|
||
|
|
bitangents[i2] = bitangent.z;
|
||
|
|
if (extrude) {
|
||
|
|
bitangents[i + bottomOffset] = bitangent.x;
|
||
|
|
bitangents[i1 + bottomOffset] = bitangent.y;
|
||
|
|
bitangents[i2 + bottomOffset] = bitangent.z;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.st) {
|
||
|
|
length = textureCoordinates.length;
|
||
|
|
for (var k = 0; k < length; k += 2) {
|
||
|
|
textureCoordinates[k] = (textureCoordinates[k] - minTexCoord.x) / (maxTexCoord.x - minTexCoord.x);
|
||
|
|
textureCoordinates[k + 1] = (textureCoordinates[k + 1] - minTexCoord.y) / (maxTexCoord.y - minTexCoord.y);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var attributes = new GeometryAttributes.GeometryAttributes();
|
||
|
|
|
||
|
|
if (vertexFormat.position) {
|
||
|
|
var finalPositions = EllipseGeometryLibrary.EllipseGeometryLibrary.raisePositionsToHeight(positions, options, extrude);
|
||
|
|
attributes.position = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.DOUBLE,
|
||
|
|
componentsPerAttribute : 3,
|
||
|
|
values : finalPositions
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.st) {
|
||
|
|
attributes.st = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.FLOAT,
|
||
|
|
componentsPerAttribute : 2,
|
||
|
|
values : textureCoordinates
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.normal) {
|
||
|
|
attributes.normal = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.FLOAT,
|
||
|
|
componentsPerAttribute : 3,
|
||
|
|
values : normals
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.tangent) {
|
||
|
|
attributes.tangent = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.FLOAT,
|
||
|
|
componentsPerAttribute : 3,
|
||
|
|
values : tangents
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.bitangent) {
|
||
|
|
attributes.bitangent = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.FLOAT,
|
||
|
|
componentsPerAttribute : 3,
|
||
|
|
values : bitangents
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
if (shadowVolume) {
|
||
|
|
attributes.extrudeDirection = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.FLOAT,
|
||
|
|
componentsPerAttribute : 3,
|
||
|
|
values : extrudeNormals
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
if (extrude && when.defined(options.offsetAttribute)) {
|
||
|
|
var offsetAttribute = new Uint8Array(size);
|
||
|
|
if (options.offsetAttribute === GeometryOffsetAttribute.GeometryOffsetAttribute.TOP) {
|
||
|
|
offsetAttribute = arrayFill.arrayFill(offsetAttribute, 1, 0, size / 2);
|
||
|
|
} else {
|
||
|
|
var offsetValue = options.offsetAttribute === GeometryOffsetAttribute.GeometryOffsetAttribute.NONE ? 0 : 1;
|
||
|
|
offsetAttribute = arrayFill.arrayFill(offsetAttribute, offsetValue);
|
||
|
|
}
|
||
|
|
|
||
|
|
attributes.applyOffset = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.UNSIGNED_BYTE,
|
||
|
|
componentsPerAttribute : 1,
|
||
|
|
values : offsetAttribute
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
return attributes;
|
||
|
|
}
|
||
|
|
|
||
|
|
function topIndices(numPts) {
|
||
|
|
// numTriangles in half = 3 + 8 + 12 + ... = -1 + 4 + (4 + 4) + (4 + 4 + 4) + ... = -1 + 4 * (1 + 2 + 3 + ...)
|
||
|
|
// = -1 + 4 * ((n * ( n + 1)) / 2)
|
||
|
|
// total triangles = 2 * numTrangles in half
|
||
|
|
// indices = total triangles * 3;
|
||
|
|
// Substitute numPts for n above
|
||
|
|
|
||
|
|
var indices = new Array(12 * (numPts * ( numPts + 1)) - 6);
|
||
|
|
var indicesIndex = 0;
|
||
|
|
var prevIndex;
|
||
|
|
var numInterior;
|
||
|
|
var positionIndex;
|
||
|
|
var i;
|
||
|
|
var j;
|
||
|
|
// Indices triangles to the 'right' of the north vector
|
||
|
|
|
||
|
|
prevIndex = 0;
|
||
|
|
positionIndex = 1;
|
||
|
|
for (i = 0; i < 3; i++) {
|
||
|
|
indices[indicesIndex++] = positionIndex++;
|
||
|
|
indices[indicesIndex++] = prevIndex;
|
||
|
|
indices[indicesIndex++] = positionIndex;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 2; i < numPts + 1; ++i) {
|
||
|
|
positionIndex = i * (i + 1) - 1;
|
||
|
|
prevIndex = (i - 1) * i - 1;
|
||
|
|
|
||
|
|
indices[indicesIndex++] = positionIndex++;
|
||
|
|
indices[indicesIndex++] = prevIndex;
|
||
|
|
indices[indicesIndex++] = positionIndex;
|
||
|
|
|
||
|
|
numInterior = 2 * i;
|
||
|
|
for (j = 0; j < numInterior - 1; ++j) {
|
||
|
|
|
||
|
|
indices[indicesIndex++] = positionIndex;
|
||
|
|
indices[indicesIndex++] = prevIndex++;
|
||
|
|
indices[indicesIndex++] = prevIndex;
|
||
|
|
|
||
|
|
indices[indicesIndex++] = positionIndex++;
|
||
|
|
indices[indicesIndex++] = prevIndex;
|
||
|
|
indices[indicesIndex++] = positionIndex;
|
||
|
|
}
|
||
|
|
|
||
|
|
indices[indicesIndex++] = positionIndex++;
|
||
|
|
indices[indicesIndex++] = prevIndex;
|
||
|
|
indices[indicesIndex++] = positionIndex;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Indices for center column of triangles
|
||
|
|
numInterior = numPts * 2;
|
||
|
|
++positionIndex;
|
||
|
|
++prevIndex;
|
||
|
|
for (i = 0; i < numInterior - 1; ++i) {
|
||
|
|
indices[indicesIndex++] = positionIndex;
|
||
|
|
indices[indicesIndex++] = prevIndex++;
|
||
|
|
indices[indicesIndex++] = prevIndex;
|
||
|
|
|
||
|
|
indices[indicesIndex++] = positionIndex++;
|
||
|
|
indices[indicesIndex++] = prevIndex;
|
||
|
|
indices[indicesIndex++] = positionIndex;
|
||
|
|
}
|
||
|
|
|
||
|
|
indices[indicesIndex++] = positionIndex;
|
||
|
|
indices[indicesIndex++] = prevIndex++;
|
||
|
|
indices[indicesIndex++] = prevIndex;
|
||
|
|
|
||
|
|
indices[indicesIndex++] = positionIndex++;
|
||
|
|
indices[indicesIndex++] = prevIndex++;
|
||
|
|
indices[indicesIndex++] = prevIndex;
|
||
|
|
|
||
|
|
// Reverse the process creating indices to the 'left' of the north vector
|
||
|
|
++prevIndex;
|
||
|
|
for (i = numPts - 1; i > 1; --i) {
|
||
|
|
indices[indicesIndex++] = prevIndex++;
|
||
|
|
indices[indicesIndex++] = prevIndex;
|
||
|
|
indices[indicesIndex++] = positionIndex;
|
||
|
|
|
||
|
|
numInterior = 2 * i;
|
||
|
|
for (j = 0; j < numInterior - 1; ++j) {
|
||
|
|
indices[indicesIndex++] = positionIndex;
|
||
|
|
indices[indicesIndex++] = prevIndex++;
|
||
|
|
indices[indicesIndex++] = prevIndex;
|
||
|
|
|
||
|
|
indices[indicesIndex++] = positionIndex++;
|
||
|
|
indices[indicesIndex++] = prevIndex;
|
||
|
|
indices[indicesIndex++] = positionIndex;
|
||
|
|
}
|
||
|
|
|
||
|
|
indices[indicesIndex++] = prevIndex++;
|
||
|
|
indices[indicesIndex++] = prevIndex++;
|
||
|
|
indices[indicesIndex++] = positionIndex++;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < 3; i++) {
|
||
|
|
indices[indicesIndex++] = prevIndex++;
|
||
|
|
indices[indicesIndex++] = prevIndex;
|
||
|
|
indices[indicesIndex++] = positionIndex;
|
||
|
|
}
|
||
|
|
return indices;
|
||
|
|
}
|
||
|
|
|
||
|
|
var boundingSphereCenter = new Cartographic.Cartesian3();
|
||
|
|
|
||
|
|
function computeEllipse(options) {
|
||
|
|
var center = options.center;
|
||
|
|
boundingSphereCenter = Cartographic.Cartesian3.multiplyByScalar(options.ellipsoid.geodeticSurfaceNormal(center, boundingSphereCenter), options.height, boundingSphereCenter);
|
||
|
|
boundingSphereCenter = Cartographic.Cartesian3.add(center, boundingSphereCenter, boundingSphereCenter);
|
||
|
|
var boundingSphere = new BoundingSphere.BoundingSphere(boundingSphereCenter, options.semiMajorAxis);
|
||
|
|
var cep = EllipseGeometryLibrary.EllipseGeometryLibrary.computeEllipsePositions(options, true, false);
|
||
|
|
var positions = cep.positions;
|
||
|
|
var numPts = cep.numPts;
|
||
|
|
var attributes = computeTopBottomAttributes(positions, options, false);
|
||
|
|
var indices = topIndices(numPts);
|
||
|
|
indices = IndexDatatype.IndexDatatype.createTypedArray(positions.length / 3, indices);
|
||
|
|
return {
|
||
|
|
boundingSphere : boundingSphere,
|
||
|
|
attributes : attributes,
|
||
|
|
indices : indices
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
function computeWallAttributes(positions, options) {
|
||
|
|
var vertexFormat = options.vertexFormat;
|
||
|
|
var center = options.center;
|
||
|
|
var semiMajorAxis = options.semiMajorAxis;
|
||
|
|
var semiMinorAxis = options.semiMinorAxis;
|
||
|
|
var ellipsoid = options.ellipsoid;
|
||
|
|
var height = options.height;
|
||
|
|
var extrudedHeight = options.extrudedHeight;
|
||
|
|
var stRotation = options.stRotation;
|
||
|
|
var size = positions.length / 3 * 2;
|
||
|
|
|
||
|
|
var finalPositions = new Float64Array(size * 3);
|
||
|
|
var textureCoordinates = (vertexFormat.st) ? new Float32Array(size * 2) : undefined;
|
||
|
|
var normals = (vertexFormat.normal) ? new Float32Array(size * 3) : undefined;
|
||
|
|
var tangents = (vertexFormat.tangent) ? new Float32Array(size * 3) : undefined;
|
||
|
|
var bitangents = (vertexFormat.bitangent) ? new Float32Array(size * 3) : undefined;
|
||
|
|
|
||
|
|
var shadowVolume = options.shadowVolume;
|
||
|
|
var extrudeNormals = (shadowVolume) ? new Float32Array(size * 3) : undefined;
|
||
|
|
|
||
|
|
var textureCoordIndex = 0;
|
||
|
|
|
||
|
|
// Raise positions to a height above the ellipsoid and compute the
|
||
|
|
// texture coordinates, normals, tangents, and bitangents.
|
||
|
|
var normal = scratchNormal;
|
||
|
|
var tangent = scratchTangent;
|
||
|
|
var bitangent = scratchBitangent;
|
||
|
|
|
||
|
|
var projection = new BoundingSphere.GeographicProjection(ellipsoid);
|
||
|
|
var projectedCenter = projection.project(ellipsoid.cartesianToCartographic(center, scratchCartographic), projectedCenterScratch);
|
||
|
|
|
||
|
|
var geodeticNormal = ellipsoid.scaleToGeodeticSurface(center, scratchCartesian1);
|
||
|
|
ellipsoid.geodeticSurfaceNormal(geodeticNormal, geodeticNormal);
|
||
|
|
var rotation = Transforms.Quaternion.fromAxisAngle(geodeticNormal, stRotation, quaternionScratch);
|
||
|
|
var textureMatrix = BoundingSphere.Matrix3.fromQuaternion(rotation, textureMatrixScratch);
|
||
|
|
|
||
|
|
var minTexCoord = Cartesian2.Cartesian2.fromElements(Number.POSITIVE_INFINITY, Number.POSITIVE_INFINITY, scratchMinTexCoord);
|
||
|
|
var maxTexCoord = Cartesian2.Cartesian2.fromElements(Number.NEGATIVE_INFINITY, Number.NEGATIVE_INFINITY, scratchMaxTexCoord);
|
||
|
|
|
||
|
|
var length = positions.length;
|
||
|
|
var stOffset = length / 3 * 2;
|
||
|
|
for (var i = 0; i < length; i += 3) {
|
||
|
|
var i1 = i + 1;
|
||
|
|
var i2 = i + 2;
|
||
|
|
var position = Cartographic.Cartesian3.fromArray(positions, i, scratchCartesian1);
|
||
|
|
var extrudedPosition;
|
||
|
|
|
||
|
|
if (vertexFormat.st) {
|
||
|
|
var rotatedPoint = BoundingSphere.Matrix3.multiplyByVector(textureMatrix, position, scratchCartesian2);
|
||
|
|
var projectedPoint = projection.project(ellipsoid.cartesianToCartographic(rotatedPoint, scratchCartographic), scratchCartesian3);
|
||
|
|
Cartographic.Cartesian3.subtract(projectedPoint, projectedCenter, projectedPoint);
|
||
|
|
|
||
|
|
texCoordScratch.x = (projectedPoint.x + semiMajorAxis) / (2.0 * semiMajorAxis);
|
||
|
|
texCoordScratch.y = (projectedPoint.y + semiMinorAxis) / (2.0 * semiMinorAxis);
|
||
|
|
|
||
|
|
minTexCoord.x = Math.min(texCoordScratch.x, minTexCoord.x);
|
||
|
|
minTexCoord.y = Math.min(texCoordScratch.y, minTexCoord.y);
|
||
|
|
maxTexCoord.x = Math.max(texCoordScratch.x, maxTexCoord.x);
|
||
|
|
maxTexCoord.y = Math.max(texCoordScratch.y, maxTexCoord.y);
|
||
|
|
|
||
|
|
textureCoordinates[textureCoordIndex + stOffset] = texCoordScratch.x;
|
||
|
|
textureCoordinates[textureCoordIndex + 1 + stOffset] = texCoordScratch.y;
|
||
|
|
|
||
|
|
textureCoordinates[textureCoordIndex++] = texCoordScratch.x;
|
||
|
|
textureCoordinates[textureCoordIndex++] = texCoordScratch.y;
|
||
|
|
}
|
||
|
|
|
||
|
|
position = ellipsoid.scaleToGeodeticSurface(position, position);
|
||
|
|
extrudedPosition = Cartographic.Cartesian3.clone(position, scratchCartesian2);
|
||
|
|
normal = ellipsoid.geodeticSurfaceNormal(position, normal);
|
||
|
|
|
||
|
|
if (shadowVolume) {
|
||
|
|
extrudeNormals[i + length] = -normal.x;
|
||
|
|
extrudeNormals[i1 + length] = -normal.y;
|
||
|
|
extrudeNormals[i2 + length] = -normal.z;
|
||
|
|
}
|
||
|
|
|
||
|
|
var scaledNormal = Cartographic.Cartesian3.multiplyByScalar(normal, height, scratchCartesian4);
|
||
|
|
position = Cartographic.Cartesian3.add(position, scaledNormal, position);
|
||
|
|
scaledNormal = Cartographic.Cartesian3.multiplyByScalar(normal, extrudedHeight, scaledNormal);
|
||
|
|
extrudedPosition = Cartographic.Cartesian3.add(extrudedPosition, scaledNormal, extrudedPosition);
|
||
|
|
|
||
|
|
if (vertexFormat.position) {
|
||
|
|
finalPositions[i + length] = extrudedPosition.x;
|
||
|
|
finalPositions[i1 + length] = extrudedPosition.y;
|
||
|
|
finalPositions[i2 + length] = extrudedPosition.z;
|
||
|
|
|
||
|
|
finalPositions[i] = position.x;
|
||
|
|
finalPositions[i1] = position.y;
|
||
|
|
finalPositions[i2] = position.z;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.normal || vertexFormat.tangent || vertexFormat.bitangent) {
|
||
|
|
|
||
|
|
bitangent = Cartographic.Cartesian3.clone(normal, bitangent);
|
||
|
|
var next = Cartographic.Cartesian3.fromArray(positions, (i + 3) % length, scratchCartesian4);
|
||
|
|
Cartographic.Cartesian3.subtract(next, position, next);
|
||
|
|
var bottom = Cartographic.Cartesian3.subtract(extrudedPosition, position, scratchCartesian3);
|
||
|
|
|
||
|
|
normal = Cartographic.Cartesian3.normalize(Cartographic.Cartesian3.cross(bottom, next, normal), normal);
|
||
|
|
|
||
|
|
if (vertexFormat.normal) {
|
||
|
|
normals[i] = normal.x;
|
||
|
|
normals[i1] = normal.y;
|
||
|
|
normals[i2] = normal.z;
|
||
|
|
|
||
|
|
normals[i + length] = normal.x;
|
||
|
|
normals[i1 + length] = normal.y;
|
||
|
|
normals[i2 + length] = normal.z;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.tangent) {
|
||
|
|
tangent = Cartographic.Cartesian3.normalize(Cartographic.Cartesian3.cross(bitangent, normal, tangent), tangent);
|
||
|
|
tangents[i] = tangent.x;
|
||
|
|
tangents[i1] = tangent.y;
|
||
|
|
tangents[i2] = tangent.z;
|
||
|
|
|
||
|
|
tangents[i + length] = tangent.x;
|
||
|
|
tangents[i + 1 + length] = tangent.y;
|
||
|
|
tangents[i + 2 + length] = tangent.z;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.bitangent) {
|
||
|
|
bitangents[i ] = bitangent.x;
|
||
|
|
bitangents[i1] = bitangent.y;
|
||
|
|
bitangents[i2] = bitangent.z;
|
||
|
|
|
||
|
|
bitangents[i + length] = bitangent.x;
|
||
|
|
bitangents[i1 + length] = bitangent.y;
|
||
|
|
bitangents[i2 + length] = bitangent.z;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.st) {
|
||
|
|
length = textureCoordinates.length;
|
||
|
|
for (var k = 0; k < length; k += 2) {
|
||
|
|
textureCoordinates[k] = (textureCoordinates[k] - minTexCoord.x) / (maxTexCoord.x - minTexCoord.x);
|
||
|
|
textureCoordinates[k + 1] = (textureCoordinates[k + 1] - minTexCoord.y) / (maxTexCoord.y - minTexCoord.y);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var attributes = new GeometryAttributes.GeometryAttributes();
|
||
|
|
|
||
|
|
if (vertexFormat.position) {
|
||
|
|
attributes.position = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.DOUBLE,
|
||
|
|
componentsPerAttribute : 3,
|
||
|
|
values : finalPositions
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.st) {
|
||
|
|
attributes.st = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.FLOAT,
|
||
|
|
componentsPerAttribute : 2,
|
||
|
|
values : textureCoordinates
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.normal) {
|
||
|
|
attributes.normal = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.FLOAT,
|
||
|
|
componentsPerAttribute : 3,
|
||
|
|
values : normals
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.tangent) {
|
||
|
|
attributes.tangent = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.FLOAT,
|
||
|
|
componentsPerAttribute : 3,
|
||
|
|
values : tangents
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vertexFormat.bitangent) {
|
||
|
|
attributes.bitangent = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.FLOAT,
|
||
|
|
componentsPerAttribute : 3,
|
||
|
|
values : bitangents
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
if (shadowVolume) {
|
||
|
|
attributes.extrudeDirection = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.FLOAT,
|
||
|
|
componentsPerAttribute : 3,
|
||
|
|
values : extrudeNormals
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
if (when.defined(options.offsetAttribute)) {
|
||
|
|
var offsetAttribute = new Uint8Array(size);
|
||
|
|
if (options.offsetAttribute === GeometryOffsetAttribute.GeometryOffsetAttribute.TOP) {
|
||
|
|
offsetAttribute = arrayFill.arrayFill(offsetAttribute, 1, 0, size / 2);
|
||
|
|
} else {
|
||
|
|
var offsetValue = options.offsetAttribute === GeometryOffsetAttribute.GeometryOffsetAttribute.NONE ? 0 : 1;
|
||
|
|
offsetAttribute = arrayFill.arrayFill(offsetAttribute, offsetValue);
|
||
|
|
}
|
||
|
|
attributes.applyOffset = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.UNSIGNED_BYTE,
|
||
|
|
componentsPerAttribute : 1,
|
||
|
|
values : offsetAttribute
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
return attributes;
|
||
|
|
}
|
||
|
|
|
||
|
|
function computeWallIndices(positions) {
|
||
|
|
var length = positions.length / 3;
|
||
|
|
var indices = IndexDatatype.IndexDatatype.createTypedArray(length, length * 6);
|
||
|
|
var index = 0;
|
||
|
|
for (var i = 0; i < length; i++) {
|
||
|
|
var UL = i;
|
||
|
|
var LL = i + length;
|
||
|
|
var UR = (UL + 1) % length;
|
||
|
|
var LR = UR + length;
|
||
|
|
indices[index++] = UL;
|
||
|
|
indices[index++] = LL;
|
||
|
|
indices[index++] = UR;
|
||
|
|
indices[index++] = UR;
|
||
|
|
indices[index++] = LL;
|
||
|
|
indices[index++] = LR;
|
||
|
|
}
|
||
|
|
|
||
|
|
return indices;
|
||
|
|
}
|
||
|
|
|
||
|
|
var topBoundingSphere = new BoundingSphere.BoundingSphere();
|
||
|
|
var bottomBoundingSphere = new BoundingSphere.BoundingSphere();
|
||
|
|
|
||
|
|
function computeExtrudedEllipse(options) {
|
||
|
|
var center = options.center;
|
||
|
|
var ellipsoid = options.ellipsoid;
|
||
|
|
var semiMajorAxis = options.semiMajorAxis;
|
||
|
|
var scaledNormal = Cartographic.Cartesian3.multiplyByScalar(ellipsoid.geodeticSurfaceNormal(center, scratchCartesian1), options.height, scratchCartesian1);
|
||
|
|
topBoundingSphere.center = Cartographic.Cartesian3.add(center, scaledNormal, topBoundingSphere.center);
|
||
|
|
topBoundingSphere.radius = semiMajorAxis;
|
||
|
|
|
||
|
|
scaledNormal = Cartographic.Cartesian3.multiplyByScalar(ellipsoid.geodeticSurfaceNormal(center, scaledNormal), options.extrudedHeight, scaledNormal);
|
||
|
|
bottomBoundingSphere.center = Cartographic.Cartesian3.add(center, scaledNormal, bottomBoundingSphere.center);
|
||
|
|
bottomBoundingSphere.radius = semiMajorAxis;
|
||
|
|
|
||
|
|
var cep = EllipseGeometryLibrary.EllipseGeometryLibrary.computeEllipsePositions(options, true, true);
|
||
|
|
var positions = cep.positions;
|
||
|
|
var numPts = cep.numPts;
|
||
|
|
var outerPositions = cep.outerPositions;
|
||
|
|
var boundingSphere = BoundingSphere.BoundingSphere.union(topBoundingSphere, bottomBoundingSphere);
|
||
|
|
var topBottomAttributes = computeTopBottomAttributes(positions, options, true);
|
||
|
|
var indices = topIndices(numPts);
|
||
|
|
var length = indices.length;
|
||
|
|
indices.length = length * 2;
|
||
|
|
var posLength = positions.length / 3;
|
||
|
|
for (var i = 0; i < length; i += 3) {
|
||
|
|
indices[i + length] = indices[i + 2] + posLength;
|
||
|
|
indices[i + 1 + length] = indices[i + 1] + posLength;
|
||
|
|
indices[i + 2 + length] = indices[i] + posLength;
|
||
|
|
}
|
||
|
|
|
||
|
|
var topBottomIndices = IndexDatatype.IndexDatatype.createTypedArray(posLength * 2 / 3, indices);
|
||
|
|
|
||
|
|
var topBottomGeo = new GeometryAttribute.Geometry({
|
||
|
|
attributes : topBottomAttributes,
|
||
|
|
indices : topBottomIndices,
|
||
|
|
primitiveType : PrimitiveType.PrimitiveType.TRIANGLES
|
||
|
|
});
|
||
|
|
|
||
|
|
var wallAttributes = computeWallAttributes(outerPositions, options);
|
||
|
|
indices = computeWallIndices(outerPositions);
|
||
|
|
var wallIndices = IndexDatatype.IndexDatatype.createTypedArray(outerPositions.length * 2 / 3, indices);
|
||
|
|
|
||
|
|
var wallGeo = new GeometryAttribute.Geometry({
|
||
|
|
attributes : wallAttributes,
|
||
|
|
indices : wallIndices,
|
||
|
|
primitiveType : PrimitiveType.PrimitiveType.TRIANGLES
|
||
|
|
});
|
||
|
|
|
||
|
|
var geo = GeometryPipeline.GeometryPipeline.combineInstances([
|
||
|
|
new GeometryInstance.GeometryInstance({
|
||
|
|
geometry : topBottomGeo
|
||
|
|
}),
|
||
|
|
new GeometryInstance.GeometryInstance({
|
||
|
|
geometry : wallGeo
|
||
|
|
})
|
||
|
|
]);
|
||
|
|
|
||
|
|
return {
|
||
|
|
boundingSphere : boundingSphere,
|
||
|
|
attributes : geo[0].attributes,
|
||
|
|
indices : geo[0].indices
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
function computeRectangle(center, semiMajorAxis, semiMinorAxis, rotation, granularity, ellipsoid, result) {
|
||
|
|
var cep = EllipseGeometryLibrary.EllipseGeometryLibrary.computeEllipsePositions({
|
||
|
|
center : center,
|
||
|
|
semiMajorAxis : semiMajorAxis,
|
||
|
|
semiMinorAxis : semiMinorAxis,
|
||
|
|
rotation : rotation,
|
||
|
|
granularity : granularity
|
||
|
|
}, false, true);
|
||
|
|
var positionsFlat = cep.outerPositions;
|
||
|
|
var positionsCount = positionsFlat.length / 3;
|
||
|
|
var positions = new Array(positionsCount);
|
||
|
|
for (var i = 0; i < positionsCount; ++i) {
|
||
|
|
positions[i] = Cartographic.Cartesian3.fromArray(positionsFlat, i * 3);
|
||
|
|
}
|
||
|
|
var rectangle = Cartesian2.Rectangle.fromCartesianArray(positions, ellipsoid, result);
|
||
|
|
// Rectangle width goes beyond 180 degrees when the ellipse crosses a pole.
|
||
|
|
// When this happens, make the rectangle into a "circle" around the pole
|
||
|
|
if (rectangle.width > _Math.CesiumMath.PI) {
|
||
|
|
rectangle.north = rectangle.north > 0.0 ? _Math.CesiumMath.PI_OVER_TWO - _Math.CesiumMath.EPSILON7 : rectangle.north;
|
||
|
|
rectangle.south = rectangle.south < 0.0 ? _Math.CesiumMath.EPSILON7 - _Math.CesiumMath.PI_OVER_TWO : rectangle.south;
|
||
|
|
rectangle.east = _Math.CesiumMath.PI;
|
||
|
|
rectangle.west = -_Math.CesiumMath.PI;
|
||
|
|
}
|
||
|
|
return rectangle;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A description of an ellipse on an ellipsoid. Ellipse geometry can be rendered with both {@link Primitive} and {@link GroundPrimitive}.
|
||
|
|
*
|
||
|
|
* @alias EllipseGeometry
|
||
|
|
* @constructor
|
||
|
|
*
|
||
|
|
* @param {Object} options Object with the following properties:
|
||
|
|
* @param {Cartesian3} options.center The ellipse's center point in the fixed frame.
|
||
|
|
* @param {Number} options.semiMajorAxis The length of the ellipse's semi-major axis in meters.
|
||
|
|
* @param {Number} options.semiMinorAxis The length of the ellipse's semi-minor axis in meters.
|
||
|
|
* @param {Ellipsoid} [options.ellipsoid=Ellipsoid.WGS84] The ellipsoid the ellipse will be on.
|
||
|
|
* @param {Number} [options.height=0.0] The distance in meters between the ellipse and the ellipsoid surface.
|
||
|
|
* @param {Number} [options.extrudedHeight] The distance in meters between the ellipse's extruded face and the ellipsoid surface.
|
||
|
|
* @param {Number} [options.rotation=0.0] The angle of rotation counter-clockwise from north.
|
||
|
|
* @param {Number} [options.stRotation=0.0] The rotation of the texture coordinates counter-clockwise from north.
|
||
|
|
* @param {Number} [options.granularity=CesiumMath.RADIANS_PER_DEGREE] The angular distance between points on the ellipse in radians.
|
||
|
|
* @param {VertexFormat} [options.vertexFormat=VertexFormat.DEFAULT] The vertex attributes to be computed.
|
||
|
|
*
|
||
|
|
* @exception {DeveloperError} semiMajorAxis and semiMinorAxis must be greater than zero.
|
||
|
|
* @exception {DeveloperError} semiMajorAxis must be greater than or equal to the semiMinorAxis.
|
||
|
|
* @exception {DeveloperError} granularity must be greater than zero.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // Create an ellipse.
|
||
|
|
* var ellipse = new Cesium.EllipseGeometry({
|
||
|
|
* center : Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),
|
||
|
|
* semiMajorAxis : 500000.0,
|
||
|
|
* semiMinorAxis : 300000.0,
|
||
|
|
* rotation : Cesium.Math.toRadians(60.0)
|
||
|
|
* });
|
||
|
|
* var geometry = Cesium.EllipseGeometry.createGeometry(ellipse);
|
||
|
|
*
|
||
|
|
* @see EllipseGeometry.createGeometry
|
||
|
|
*/
|
||
|
|
function EllipseGeometry(options) {
|
||
|
|
options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
|
||
|
|
|
||
|
|
var center = options.center;
|
||
|
|
var ellipsoid = when.defaultValue(options.ellipsoid, Cartesian2.Ellipsoid.WGS84);
|
||
|
|
var semiMajorAxis = options.semiMajorAxis;
|
||
|
|
var semiMinorAxis = options.semiMinorAxis;
|
||
|
|
var granularity = when.defaultValue(options.granularity, _Math.CesiumMath.RADIANS_PER_DEGREE);
|
||
|
|
var vertexFormat = when.defaultValue(options.vertexFormat, VertexFormat.VertexFormat.DEFAULT);
|
||
|
|
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
Check.Check.defined('options.center', center);
|
||
|
|
Check.Check.typeOf.number('options.semiMajorAxis', semiMajorAxis);
|
||
|
|
Check.Check.typeOf.number('options.semiMinorAxis', semiMinorAxis);
|
||
|
|
if (semiMajorAxis < semiMinorAxis) {
|
||
|
|
throw new Check.DeveloperError('semiMajorAxis must be greater than or equal to the semiMinorAxis.');
|
||
|
|
}
|
||
|
|
if (granularity <= 0.0) {
|
||
|
|
throw new Check.DeveloperError('granularity must be greater than zero.');
|
||
|
|
}
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
var height = when.defaultValue(options.height, 0.0);
|
||
|
|
var extrudedHeight = when.defaultValue(options.extrudedHeight, height);
|
||
|
|
|
||
|
|
this._center = Cartographic.Cartesian3.clone(center);
|
||
|
|
this._semiMajorAxis = semiMajorAxis;
|
||
|
|
this._semiMinorAxis = semiMinorAxis;
|
||
|
|
this._ellipsoid = Cartesian2.Ellipsoid.clone(ellipsoid);
|
||
|
|
this._rotation = when.defaultValue(options.rotation, 0.0);
|
||
|
|
this._stRotation = when.defaultValue(options.stRotation, 0.0);
|
||
|
|
this._height = Math.max(extrudedHeight, height);
|
||
|
|
this._granularity = granularity;
|
||
|
|
this._vertexFormat = VertexFormat.VertexFormat.clone(vertexFormat);
|
||
|
|
this._extrudedHeight = Math.min(extrudedHeight, height);
|
||
|
|
this._shadowVolume = when.defaultValue(options.shadowVolume, false);
|
||
|
|
this._workerName = 'createEllipseGeometry';
|
||
|
|
this._offsetAttribute = options.offsetAttribute;
|
||
|
|
|
||
|
|
this._rectangle = undefined;
|
||
|
|
this._textureCoordinateRotationPoints = undefined;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The number of elements used to pack the object into an array.
|
||
|
|
* @type {Number}
|
||
|
|
*/
|
||
|
|
EllipseGeometry.packedLength = Cartographic.Cartesian3.packedLength + Cartesian2.Ellipsoid.packedLength + VertexFormat.VertexFormat.packedLength + 9;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Stores the provided instance into the provided array.
|
||
|
|
*
|
||
|
|
* @param {EllipseGeometry} 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
|
||
|
|
*/
|
||
|
|
EllipseGeometry.pack = function(value, array, startingIndex) {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
Check.Check.defined('value', value);
|
||
|
|
Check.Check.defined('array', array);
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
startingIndex = when.defaultValue(startingIndex, 0);
|
||
|
|
|
||
|
|
Cartographic.Cartesian3.pack(value._center, array, startingIndex);
|
||
|
|
startingIndex += Cartographic.Cartesian3.packedLength;
|
||
|
|
|
||
|
|
Cartesian2.Ellipsoid.pack(value._ellipsoid, array, startingIndex);
|
||
|
|
startingIndex += Cartesian2.Ellipsoid.packedLength;
|
||
|
|
|
||
|
|
VertexFormat.VertexFormat.pack(value._vertexFormat, array, startingIndex);
|
||
|
|
startingIndex += VertexFormat.VertexFormat.packedLength;
|
||
|
|
|
||
|
|
array[startingIndex++] = value._semiMajorAxis;
|
||
|
|
array[startingIndex++] = value._semiMinorAxis;
|
||
|
|
array[startingIndex++] = value._rotation;
|
||
|
|
array[startingIndex++] = value._stRotation;
|
||
|
|
array[startingIndex++] = value._height;
|
||
|
|
array[startingIndex++] = value._granularity;
|
||
|
|
array[startingIndex++] = value._extrudedHeight;
|
||
|
|
array[startingIndex++] = value._shadowVolume ? 1.0 : 0.0;
|
||
|
|
array[startingIndex] = when.defaultValue(value._offsetAttribute, -1);
|
||
|
|
|
||
|
|
return array;
|
||
|
|
};
|
||
|
|
|
||
|
|
var scratchCenter = new Cartographic.Cartesian3();
|
||
|
|
var scratchEllipsoid = new Cartesian2.Ellipsoid();
|
||
|
|
var scratchVertexFormat = new VertexFormat.VertexFormat();
|
||
|
|
var scratchOptions = {
|
||
|
|
center : scratchCenter,
|
||
|
|
ellipsoid : scratchEllipsoid,
|
||
|
|
vertexFormat : scratchVertexFormat,
|
||
|
|
semiMajorAxis : undefined,
|
||
|
|
semiMinorAxis : undefined,
|
||
|
|
rotation : undefined,
|
||
|
|
stRotation : undefined,
|
||
|
|
height : undefined,
|
||
|
|
granularity : undefined,
|
||
|
|
extrudedHeight : undefined,
|
||
|
|
shadowVolume: undefined,
|
||
|
|
offsetAttribute: undefined
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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 {EllipseGeometry} [result] The object into which to store the result.
|
||
|
|
* @returns {EllipseGeometry} The modified result parameter or a new EllipseGeometry instance if one was not provided.
|
||
|
|
*/
|
||
|
|
EllipseGeometry.unpack = function(array, startingIndex, result) {
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
Check.Check.defined('array', array);
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
startingIndex = when.defaultValue(startingIndex, 0);
|
||
|
|
|
||
|
|
var center = Cartographic.Cartesian3.unpack(array, startingIndex, scratchCenter);
|
||
|
|
startingIndex += Cartographic.Cartesian3.packedLength;
|
||
|
|
|
||
|
|
var ellipsoid = Cartesian2.Ellipsoid.unpack(array, startingIndex, scratchEllipsoid);
|
||
|
|
startingIndex += Cartesian2.Ellipsoid.packedLength;
|
||
|
|
|
||
|
|
var vertexFormat = VertexFormat.VertexFormat.unpack(array, startingIndex, scratchVertexFormat);
|
||
|
|
startingIndex += VertexFormat.VertexFormat.packedLength;
|
||
|
|
|
||
|
|
var semiMajorAxis = array[startingIndex++];
|
||
|
|
var semiMinorAxis = array[startingIndex++];
|
||
|
|
var rotation = array[startingIndex++];
|
||
|
|
var stRotation = array[startingIndex++];
|
||
|
|
var height = array[startingIndex++];
|
||
|
|
var granularity = array[startingIndex++];
|
||
|
|
var extrudedHeight = array[startingIndex++];
|
||
|
|
var shadowVolume = array[startingIndex++] === 1.0;
|
||
|
|
var offsetAttribute = array[startingIndex];
|
||
|
|
|
||
|
|
if (!when.defined(result)) {
|
||
|
|
scratchOptions.height = height;
|
||
|
|
scratchOptions.extrudedHeight = extrudedHeight;
|
||
|
|
scratchOptions.granularity = granularity;
|
||
|
|
scratchOptions.stRotation = stRotation;
|
||
|
|
scratchOptions.rotation = rotation;
|
||
|
|
scratchOptions.semiMajorAxis = semiMajorAxis;
|
||
|
|
scratchOptions.semiMinorAxis = semiMinorAxis;
|
||
|
|
scratchOptions.shadowVolume = shadowVolume;
|
||
|
|
scratchOptions.offsetAttribute = offsetAttribute === -1 ? undefined : offsetAttribute;
|
||
|
|
|
||
|
|
return new EllipseGeometry(scratchOptions);
|
||
|
|
}
|
||
|
|
|
||
|
|
result._center = Cartographic.Cartesian3.clone(center, result._center);
|
||
|
|
result._ellipsoid = Cartesian2.Ellipsoid.clone(ellipsoid, result._ellipsoid);
|
||
|
|
result._vertexFormat = VertexFormat.VertexFormat.clone(vertexFormat, result._vertexFormat);
|
||
|
|
result._semiMajorAxis = semiMajorAxis;
|
||
|
|
result._semiMinorAxis = semiMinorAxis;
|
||
|
|
result._rotation = rotation;
|
||
|
|
result._stRotation = stRotation;
|
||
|
|
result._height = height;
|
||
|
|
result._granularity = granularity;
|
||
|
|
result._extrudedHeight = extrudedHeight;
|
||
|
|
result._shadowVolume = shadowVolume;
|
||
|
|
result._offsetAttribute = offsetAttribute === -1 ? undefined : offsetAttribute;
|
||
|
|
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Computes the bounding rectangle based on the provided options
|
||
|
|
*
|
||
|
|
* @param {Object} options Object with the following properties:
|
||
|
|
* @param {Cartesian3} options.center The ellipse's center point in the fixed frame.
|
||
|
|
* @param {Number} options.semiMajorAxis The length of the ellipse's semi-major axis in meters.
|
||
|
|
* @param {Number} options.semiMinorAxis The length of the ellipse's semi-minor axis in meters.
|
||
|
|
* @param {Ellipsoid} [options.ellipsoid=Ellipsoid.WGS84] The ellipsoid the ellipse will be on.
|
||
|
|
* @param {Number} [options.rotation=0.0] The angle of rotation counter-clockwise from north.
|
||
|
|
* @param {Number} [options.granularity=CesiumMath.RADIANS_PER_DEGREE] The angular distance between points on the ellipse in radians.
|
||
|
|
* @param {Rectangle} [result] An object in which to store the result
|
||
|
|
*
|
||
|
|
* @returns {Rectangle} The result rectangle
|
||
|
|
*/
|
||
|
|
EllipseGeometry.computeRectangle = function(options, result) {
|
||
|
|
options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
|
||
|
|
|
||
|
|
var center = options.center;
|
||
|
|
var ellipsoid = when.defaultValue(options.ellipsoid, Cartesian2.Ellipsoid.WGS84);
|
||
|
|
var semiMajorAxis = options.semiMajorAxis;
|
||
|
|
var semiMinorAxis = options.semiMinorAxis;
|
||
|
|
var granularity = when.defaultValue(options.granularity, _Math.CesiumMath.RADIANS_PER_DEGREE);
|
||
|
|
var rotation = when.defaultValue(options.rotation, 0.0);
|
||
|
|
|
||
|
|
//>>includeStart('debug', pragmas.debug);
|
||
|
|
Check.Check.defined('options.center', center);
|
||
|
|
Check.Check.typeOf.number('options.semiMajorAxis', semiMajorAxis);
|
||
|
|
Check.Check.typeOf.number('options.semiMinorAxis', semiMinorAxis);
|
||
|
|
if (semiMajorAxis < semiMinorAxis) {
|
||
|
|
throw new Check.DeveloperError('semiMajorAxis must be greater than or equal to the semiMinorAxis.');
|
||
|
|
}
|
||
|
|
if (granularity <= 0.0) {
|
||
|
|
throw new Check.DeveloperError('granularity must be greater than zero.');
|
||
|
|
}
|
||
|
|
//>>includeEnd('debug');
|
||
|
|
|
||
|
|
return computeRectangle(center, semiMajorAxis, semiMinorAxis, rotation, granularity, ellipsoid, result);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Computes the geometric representation of a ellipse on an ellipsoid, including its vertices, indices, and a bounding sphere.
|
||
|
|
*
|
||
|
|
* @param {EllipseGeometry} ellipseGeometry A description of the ellipse.
|
||
|
|
* @returns {Geometry|undefined} The computed vertices and indices.
|
||
|
|
*/
|
||
|
|
EllipseGeometry.createGeometry = function(ellipseGeometry) {
|
||
|
|
if ((ellipseGeometry._semiMajorAxis <= 0.0) || (ellipseGeometry._semiMinorAxis <= 0.0)) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
var height = ellipseGeometry._height;
|
||
|
|
var extrudedHeight = ellipseGeometry._extrudedHeight;
|
||
|
|
var extrude = !_Math.CesiumMath.equalsEpsilon(height, extrudedHeight, 0, _Math.CesiumMath.EPSILON2);
|
||
|
|
|
||
|
|
ellipseGeometry._center = ellipseGeometry._ellipsoid.scaleToGeodeticSurface(ellipseGeometry._center, ellipseGeometry._center);
|
||
|
|
var options = {
|
||
|
|
center : ellipseGeometry._center,
|
||
|
|
semiMajorAxis : ellipseGeometry._semiMajorAxis,
|
||
|
|
semiMinorAxis : ellipseGeometry._semiMinorAxis,
|
||
|
|
ellipsoid : ellipseGeometry._ellipsoid,
|
||
|
|
rotation : ellipseGeometry._rotation,
|
||
|
|
height : height,
|
||
|
|
granularity : ellipseGeometry._granularity,
|
||
|
|
vertexFormat : ellipseGeometry._vertexFormat,
|
||
|
|
stRotation : ellipseGeometry._stRotation
|
||
|
|
};
|
||
|
|
var geometry;
|
||
|
|
if (extrude) {
|
||
|
|
options.extrudedHeight = extrudedHeight;
|
||
|
|
options.shadowVolume = ellipseGeometry._shadowVolume;
|
||
|
|
options.offsetAttribute = ellipseGeometry._offsetAttribute;
|
||
|
|
geometry = computeExtrudedEllipse(options);
|
||
|
|
} else {
|
||
|
|
geometry = computeEllipse(options);
|
||
|
|
|
||
|
|
if (when.defined(ellipseGeometry._offsetAttribute)) {
|
||
|
|
var length = geometry.attributes.position.values.length;
|
||
|
|
var applyOffset = new Uint8Array(length / 3);
|
||
|
|
var offsetValue = ellipseGeometry._offsetAttribute === GeometryOffsetAttribute.GeometryOffsetAttribute.NONE ? 0 : 1;
|
||
|
|
arrayFill.arrayFill(applyOffset, offsetValue);
|
||
|
|
geometry.attributes.applyOffset = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.UNSIGNED_BYTE,
|
||
|
|
componentsPerAttribute : 1,
|
||
|
|
values: applyOffset
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return new GeometryAttribute.Geometry({
|
||
|
|
attributes : geometry.attributes,
|
||
|
|
indices : geometry.indices,
|
||
|
|
primitiveType : PrimitiveType.PrimitiveType.TRIANGLES,
|
||
|
|
boundingSphere : geometry.boundingSphere,
|
||
|
|
offsetAttribute : ellipseGeometry._offsetAttribute
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
EllipseGeometry.createShadowVolume = function(ellipseGeometry, minHeightFunc, maxHeightFunc) {
|
||
|
|
var granularity = ellipseGeometry._granularity;
|
||
|
|
var ellipsoid = ellipseGeometry._ellipsoid;
|
||
|
|
|
||
|
|
var minHeight = minHeightFunc(granularity, ellipsoid);
|
||
|
|
var maxHeight = maxHeightFunc(granularity, ellipsoid);
|
||
|
|
|
||
|
|
return new EllipseGeometry({
|
||
|
|
center : ellipseGeometry._center,
|
||
|
|
semiMajorAxis : ellipseGeometry._semiMajorAxis,
|
||
|
|
semiMinorAxis : ellipseGeometry._semiMinorAxis,
|
||
|
|
ellipsoid : ellipsoid,
|
||
|
|
rotation : ellipseGeometry._rotation,
|
||
|
|
stRotation : ellipseGeometry._stRotation,
|
||
|
|
granularity : granularity,
|
||
|
|
extrudedHeight : minHeight,
|
||
|
|
height : maxHeight,
|
||
|
|
vertexFormat : VertexFormat.VertexFormat.POSITION_ONLY,
|
||
|
|
shadowVolume: true
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
function textureCoordinateRotationPoints(ellipseGeometry) {
|
||
|
|
var stRotation = -ellipseGeometry._stRotation;
|
||
|
|
if (stRotation === 0.0) {
|
||
|
|
return [0, 0, 0, 1, 1, 0];
|
||
|
|
}
|
||
|
|
|
||
|
|
var cep = EllipseGeometryLibrary.EllipseGeometryLibrary.computeEllipsePositions({
|
||
|
|
center : ellipseGeometry._center,
|
||
|
|
semiMajorAxis : ellipseGeometry._semiMajorAxis,
|
||
|
|
semiMinorAxis : ellipseGeometry._semiMinorAxis,
|
||
|
|
rotation : ellipseGeometry._rotation,
|
||
|
|
granularity : ellipseGeometry._granularity
|
||
|
|
}, false, true);
|
||
|
|
var positionsFlat = cep.outerPositions;
|
||
|
|
var positionsCount = positionsFlat.length / 3;
|
||
|
|
var positions = new Array(positionsCount);
|
||
|
|
for (var i = 0; i < positionsCount; ++i) {
|
||
|
|
positions[i] = Cartographic.Cartesian3.fromArray(positionsFlat, i * 3);
|
||
|
|
}
|
||
|
|
|
||
|
|
var ellipsoid = ellipseGeometry._ellipsoid;
|
||
|
|
var boundingRectangle = ellipseGeometry.rectangle;
|
||
|
|
return GeometryAttribute.Geometry._textureCoordinateRotationPoints(positions, stRotation, ellipsoid, boundingRectangle);
|
||
|
|
}
|
||
|
|
|
||
|
|
Object.defineProperties(EllipseGeometry.prototype, {
|
||
|
|
/**
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
rectangle : {
|
||
|
|
get : function() {
|
||
|
|
if (!when.defined(this._rectangle)) {
|
||
|
|
this._rectangle = computeRectangle(this._center, this._semiMajorAxis, this._semiMinorAxis, this._rotation, this._granularity, this._ellipsoid);
|
||
|
|
}
|
||
|
|
return this._rectangle;
|
||
|
|
}
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* For remapping texture coordinates when rendering EllipseGeometries as GroundPrimitives.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
textureCoordinateRotationPoints : {
|
||
|
|
get : function() {
|
||
|
|
if (!when.defined(this._textureCoordinateRotationPoints)) {
|
||
|
|
this._textureCoordinateRotationPoints = textureCoordinateRotationPoints(this);
|
||
|
|
}
|
||
|
|
return this._textureCoordinateRotationPoints;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
exports.EllipseGeometry = EllipseGeometry;
|
||
|
|
|
||
|
|
});
|