446 lines
20 KiB
JavaScript
446 lines
20 KiB
JavaScript
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/**
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* Cesium - https://github.com/AnalyticalGraphicsInc/cesium
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*
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* Copyright 2011-2017 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/AnalyticalGraphicsInc/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', './Cartesian2-85064f09', './BoundingSphere-775c5788', './ComponentDatatype-5862616f', './GeometryAttribute-91704ebb', './PrimitiveType-97893bc7', './GeometryAttributes-aacecde6', './IndexDatatype-9435b55f', './GeometryOffsetAttribute-ca302482', './VertexFormat-fe4db402', './CylinderGeometryLibrary-8c0fda9f'], function (exports, when, Check, _Math, Cartographic, Cartesian2, BoundingSphere, ComponentDatatype, GeometryAttribute, PrimitiveType, GeometryAttributes, IndexDatatype, GeometryOffsetAttribute, VertexFormat, CylinderGeometryLibrary) { 'use strict';
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var radiusScratch = new Cartesian2.Cartesian2();
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var normalScratch = new Cartographic.Cartesian3();
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var bitangentScratch = new Cartographic.Cartesian3();
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var tangentScratch = new Cartographic.Cartesian3();
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var positionScratch = new Cartographic.Cartesian3();
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/**
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* A description of a cylinder.
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*
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* @alias CylinderGeometry
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* @constructor
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*
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* @param {Object} options Object with the following properties:
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* @param {Number} options.length The length of the cylinder.
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* @param {Number} options.topRadius The radius of the top of the cylinder.
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* @param {Number} options.bottomRadius The radius of the bottom of the cylinder.
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* @param {Number} [options.slices=128] The number of edges around the perimeter of the cylinder.
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* @param {VertexFormat} [options.vertexFormat=VertexFormat.DEFAULT] The vertex attributes to be computed.
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*
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* @exception {DeveloperError} options.slices must be greater than or equal to 3.
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*
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* @see CylinderGeometry.createGeometry
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*
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* @example
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* // create cylinder geometry
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* var cylinder = new Cesium.CylinderGeometry({
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* length: 200000,
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* topRadius: 80000,
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* bottomRadius: 200000,
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* });
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* var geometry = Cesium.CylinderGeometry.createGeometry(cylinder);
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*/
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function CylinderGeometry(options) {
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options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
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var length = options.length;
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var topRadius = options.topRadius;
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var bottomRadius = options.bottomRadius;
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var vertexFormat = when.defaultValue(options.vertexFormat, VertexFormat.VertexFormat.DEFAULT);
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var slices = when.defaultValue(options.slices, 128);
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//>>includeStart('debug', pragmas.debug);
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if (!when.defined(length)) {
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throw new Check.DeveloperError('options.length must be defined.');
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}
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if (!when.defined(topRadius)) {
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throw new Check.DeveloperError('options.topRadius must be defined.');
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}
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if (!when.defined(bottomRadius)) {
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throw new Check.DeveloperError('options.bottomRadius must be defined.');
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}
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if (slices < 3) {
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throw new Check.DeveloperError('options.slices must be greater than or equal to 3.');
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}
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if (when.defined(options.offsetAttribute) && options.offsetAttribute === GeometryOffsetAttribute.GeometryOffsetAttribute.TOP) {
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throw new Check.DeveloperError('GeometryOffsetAttribute.TOP is not a supported options.offsetAttribute for this geometry.');
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}
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//>>includeEnd('debug');
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this._length = length;
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this._topRadius = topRadius;
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this._bottomRadius = bottomRadius;
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this._vertexFormat = VertexFormat.VertexFormat.clone(vertexFormat);
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this._slices = slices;
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this._offsetAttribute = options.offsetAttribute;
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this._workerName = 'createCylinderGeometry';
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}
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/**
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* The number of elements used to pack the object into an array.
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* @type {Number}
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*/
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CylinderGeometry.packedLength = VertexFormat.VertexFormat.packedLength + 5;
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/**
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* Stores the provided instance into the provided array.
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*
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* @param {CylinderGeometry} value The value to pack.
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* @param {Number[]} array The array to pack into.
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* @param {Number} [startingIndex=0] The index into the array at which to start packing the elements.
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*
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* @returns {Number[]} The array that was packed into
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*/
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CylinderGeometry.pack = function(value, array, startingIndex) {
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//>>includeStart('debug', pragmas.debug);
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if (!when.defined(value)) {
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throw new Check.DeveloperError('value is required');
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}
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if (!when.defined(array)) {
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throw new Check.DeveloperError('array is required');
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}
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//>>includeEnd('debug');
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startingIndex = when.defaultValue(startingIndex, 0);
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VertexFormat.VertexFormat.pack(value._vertexFormat, array, startingIndex);
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startingIndex += VertexFormat.VertexFormat.packedLength;
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array[startingIndex++] = value._length;
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array[startingIndex++] = value._topRadius;
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array[startingIndex++] = value._bottomRadius;
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array[startingIndex++] = value._slices;
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array[startingIndex] = when.defaultValue(value._offsetAttribute, -1);
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return array;
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};
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var scratchVertexFormat = new VertexFormat.VertexFormat();
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var scratchOptions = {
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vertexFormat : scratchVertexFormat,
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length : undefined,
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topRadius : undefined,
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bottomRadius : undefined,
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slices : undefined,
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offsetAttribute : undefined
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};
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/**
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* Retrieves an instance from a packed array.
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*
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* @param {Number[]} array The packed array.
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* @param {Number} [startingIndex=0] The starting index of the element to be unpacked.
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* @param {CylinderGeometry} [result] The object into which to store the result.
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* @returns {CylinderGeometry} The modified result parameter or a new CylinderGeometry instance if one was not provided.
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*/
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CylinderGeometry.unpack = function(array, startingIndex, result) {
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//>>includeStart('debug', pragmas.debug);
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if (!when.defined(array)) {
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throw new Check.DeveloperError('array is required');
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}
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//>>includeEnd('debug');
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startingIndex = when.defaultValue(startingIndex, 0);
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var vertexFormat = VertexFormat.VertexFormat.unpack(array, startingIndex, scratchVertexFormat);
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startingIndex += VertexFormat.VertexFormat.packedLength;
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var length = array[startingIndex++];
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var topRadius = array[startingIndex++];
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var bottomRadius = array[startingIndex++];
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var slices = array[startingIndex++];
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var offsetAttribute = array[startingIndex];
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if (!when.defined(result)) {
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scratchOptions.length = length;
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scratchOptions.topRadius = topRadius;
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scratchOptions.bottomRadius = bottomRadius;
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scratchOptions.slices = slices;
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scratchOptions.offsetAttribute = offsetAttribute === -1 ? undefined : offsetAttribute;
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return new CylinderGeometry(scratchOptions);
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}
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result._vertexFormat = VertexFormat.VertexFormat.clone(vertexFormat, result._vertexFormat);
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result._length = length;
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result._topRadius = topRadius;
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result._bottomRadius = bottomRadius;
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result._slices = slices;
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result._offsetAttribute = offsetAttribute === -1 ? undefined : offsetAttribute;
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return result;
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};
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/**
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* Computes the geometric representation of a cylinder, including its vertices, indices, and a bounding sphere.
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*
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* @param {CylinderGeometry} cylinderGeometry A description of the cylinder.
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* @returns {Geometry|undefined} The computed vertices and indices.
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*/
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CylinderGeometry.createGeometry = function(cylinderGeometry) {
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var length = cylinderGeometry._length;
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var topRadius = cylinderGeometry._topRadius;
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var bottomRadius = cylinderGeometry._bottomRadius;
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var vertexFormat = cylinderGeometry._vertexFormat;
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var slices = cylinderGeometry._slices;
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if ((length <= 0) || (topRadius < 0) || (bottomRadius < 0) || ((topRadius === 0) && (bottomRadius === 0))) {
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return;
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}
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var twoSlices = slices + slices;
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var threeSlices = slices + twoSlices;
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var numVertices = twoSlices + twoSlices;
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var positions = CylinderGeometryLibrary.CylinderGeometryLibrary.computePositions(length, topRadius, bottomRadius, slices, true);
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var st = (vertexFormat.st) ? new Float32Array(numVertices * 2) : undefined;
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var normals = (vertexFormat.normal) ? new Float32Array(numVertices * 3) : undefined;
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var tangents = (vertexFormat.tangent) ? new Float32Array(numVertices * 3) : undefined;
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var bitangents = (vertexFormat.bitangent) ? new Float32Array(numVertices * 3) : undefined;
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var i;
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var computeNormal = (vertexFormat.normal || vertexFormat.tangent || vertexFormat.bitangent);
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if (computeNormal) {
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var computeTangent = (vertexFormat.tangent || vertexFormat.bitangent);
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var normalIndex = 0;
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var tangentIndex = 0;
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var bitangentIndex = 0;
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var theta = Math.atan2(bottomRadius - topRadius, length);
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var normal = normalScratch;
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normal.z = Math.sin(theta);
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var normalScale = Math.cos(theta);
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var tangent = tangentScratch;
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var bitangent = bitangentScratch;
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for (i = 0; i < slices; i++) {
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var angle = i / slices * _Math.CesiumMath.TWO_PI;
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var x = normalScale * Math.cos(angle);
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var y = normalScale * Math.sin(angle);
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if (computeNormal) {
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normal.x = x;
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normal.y = y;
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if (computeTangent) {
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tangent = Cartographic.Cartesian3.normalize(Cartographic.Cartesian3.cross(Cartographic.Cartesian3.UNIT_Z, normal, tangent), tangent);
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}
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if (vertexFormat.normal) {
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normals[normalIndex++] = normal.x;
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normals[normalIndex++] = normal.y;
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normals[normalIndex++] = normal.z;
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normals[normalIndex++] = normal.x;
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normals[normalIndex++] = normal.y;
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normals[normalIndex++] = normal.z;
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}
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if (vertexFormat.tangent) {
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tangents[tangentIndex++] = tangent.x;
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tangents[tangentIndex++] = tangent.y;
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tangents[tangentIndex++] = tangent.z;
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tangents[tangentIndex++] = tangent.x;
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tangents[tangentIndex++] = tangent.y;
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tangents[tangentIndex++] = tangent.z;
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}
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if (vertexFormat.bitangent) {
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bitangent = Cartographic.Cartesian3.normalize(Cartographic.Cartesian3.cross(normal, tangent, bitangent), bitangent);
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bitangents[bitangentIndex++] = bitangent.x;
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bitangents[bitangentIndex++] = bitangent.y;
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bitangents[bitangentIndex++] = bitangent.z;
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bitangents[bitangentIndex++] = bitangent.x;
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bitangents[bitangentIndex++] = bitangent.y;
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bitangents[bitangentIndex++] = bitangent.z;
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}
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}
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}
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for (i = 0; i < slices; i++) {
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if (vertexFormat.normal) {
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normals[normalIndex++] = 0;
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normals[normalIndex++] = 0;
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normals[normalIndex++] = -1;
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}
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if (vertexFormat.tangent) {
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tangents[tangentIndex++] = 1;
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tangents[tangentIndex++] = 0;
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tangents[tangentIndex++] = 0;
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}
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if (vertexFormat.bitangent) {
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bitangents[bitangentIndex++] = 0;
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bitangents[bitangentIndex++] = -1;
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bitangents[bitangentIndex++] = 0;
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}
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}
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for (i = 0; i < slices; i++) {
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if (vertexFormat.normal) {
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normals[normalIndex++] = 0;
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normals[normalIndex++] = 0;
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normals[normalIndex++] = 1;
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}
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if (vertexFormat.tangent) {
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tangents[tangentIndex++] = 1;
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tangents[tangentIndex++] = 0;
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tangents[tangentIndex++] = 0;
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}
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if (vertexFormat.bitangent) {
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bitangents[bitangentIndex++] = 0;
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bitangents[bitangentIndex++] = 1;
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bitangents[bitangentIndex++] = 0;
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}
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}
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}
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var numIndices = 12 * slices - 12;
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var indices = IndexDatatype.IndexDatatype.createTypedArray(numVertices, numIndices);
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var index = 0;
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var j = 0;
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for (i = 0; i < slices - 1; i++) {
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indices[index++] = j;
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indices[index++] = j + 2;
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indices[index++] = j + 3;
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indices[index++] = j;
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indices[index++] = j + 3;
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indices[index++] = j + 1;
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j += 2;
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}
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indices[index++] = twoSlices - 2;
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indices[index++] = 0;
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indices[index++] = 1;
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indices[index++] = twoSlices - 2;
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indices[index++] = 1;
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indices[index++] = twoSlices - 1;
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for (i = 1; i < slices - 1; i++) {
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indices[index++] = twoSlices + i + 1;
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indices[index++] = twoSlices + i;
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indices[index++] = twoSlices;
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}
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for (i = 1; i < slices - 1; i++) {
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indices[index++] = threeSlices;
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indices[index++] = threeSlices + i;
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indices[index++] = threeSlices + i + 1;
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}
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var textureCoordIndex = 0;
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if (vertexFormat.st) {
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var rad = Math.max(topRadius, bottomRadius);
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for (i = 0; i < numVertices; i++) {
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var position = Cartographic.Cartesian3.fromArray(positions, i * 3, positionScratch);
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|
|
st[textureCoordIndex++] = (position.x + rad) / (2.0 * rad);
|
||
|
|
st[textureCoordIndex++] = (position.y + rad) / (2.0 * rad);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var attributes = new GeometryAttributes.GeometryAttributes();
|
||
|
|
if (vertexFormat.position) {
|
||
|
|
attributes.position = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype: ComponentDatatype.ComponentDatatype.DOUBLE,
|
||
|
|
componentsPerAttribute: 3,
|
||
|
|
values: positions
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
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 (vertexFormat.st) {
|
||
|
|
attributes.st = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.FLOAT,
|
||
|
|
componentsPerAttribute : 2,
|
||
|
|
values : st
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
radiusScratch.x = length * 0.5;
|
||
|
|
radiusScratch.y = Math.max(bottomRadius, topRadius);
|
||
|
|
|
||
|
|
var boundingSphere = new BoundingSphere.BoundingSphere(Cartographic.Cartesian3.ZERO, Cartesian2.Cartesian2.magnitude(radiusScratch));
|
||
|
|
|
||
|
|
if (when.defined(cylinderGeometry._offsetAttribute)) {
|
||
|
|
length = positions.length;
|
||
|
|
var applyOffset = new Uint8Array(length / 3);
|
||
|
|
var offsetValue = cylinderGeometry._offsetAttribute === GeometryOffsetAttribute.GeometryOffsetAttribute.NONE ? 0 : 1;
|
||
|
|
GeometryOffsetAttribute.arrayFill(applyOffset, offsetValue);
|
||
|
|
attributes.applyOffset = new GeometryAttribute.GeometryAttribute({
|
||
|
|
componentDatatype : ComponentDatatype.ComponentDatatype.UNSIGNED_BYTE,
|
||
|
|
componentsPerAttribute : 1,
|
||
|
|
values: applyOffset
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
return new GeometryAttribute.Geometry({
|
||
|
|
attributes : attributes,
|
||
|
|
indices : indices,
|
||
|
|
primitiveType : PrimitiveType.PrimitiveType.TRIANGLES,
|
||
|
|
boundingSphere : boundingSphere,
|
||
|
|
offsetAttribute : cylinderGeometry._offsetAttribute
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
var unitCylinderGeometry;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the geometric representation of a unit cylinder, including its vertices, indices, and a bounding sphere.
|
||
|
|
* @returns {Geometry} The computed vertices and indices.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
CylinderGeometry.getUnitCylinder = function() {
|
||
|
|
if (!when.defined(unitCylinderGeometry)) {
|
||
|
|
unitCylinderGeometry = CylinderGeometry.createGeometry(new CylinderGeometry({
|
||
|
|
topRadius : 1.0,
|
||
|
|
bottomRadius : 1.0,
|
||
|
|
length : 1.0,
|
||
|
|
vertexFormat : VertexFormat.VertexFormat.POSITION_ONLY
|
||
|
|
}));
|
||
|
|
}
|
||
|
|
return unitCylinderGeometry;
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.CylinderGeometry = CylinderGeometry;
|
||
|
|
|
||
|
|
});
|