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565 lines
20 KiB
JavaScript
565 lines
20 KiB
JavaScript
/**
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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(['./when-208fe5b0', './Cartesian2-716c2715', './ArcType-dc1c5aee', './arrayRemoveDuplicates-28d5a12e', './Transforms-f1816abc', './Color-11ac8724', './ComponentDatatype-549ec0d3', './Check-d18af7c4', './GeometryAttribute-0ee94cf1', './GeometryAttributes-b0b294d8', './IndexDatatype-d9b71b2b', './Math-3ba16bed', './PolylinePipeline-13b674b4', './VertexFormat-24041ad5', './RuntimeError-7f634f5d', './WebGLConstants-76bb35d1', './EllipsoidGeodesic-4bc5cec5', './EllipsoidRhumbLine-4543b386', './IntersectionTests-680c4e46', './Plane-f5dfabcd'], function (when, Cartesian2, ArcType, arrayRemoveDuplicates, Transforms, Color, ComponentDatatype, Check, GeometryAttribute, GeometryAttributes, IndexDatatype, _Math, PolylinePipeline, VertexFormat, RuntimeError, WebGLConstants, EllipsoidGeodesic, EllipsoidRhumbLine, IntersectionTests, Plane) { 'use strict';
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var scratchInterpolateColorsArray = [];
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function interpolateColors(p0, p1, color0, color1, numPoints) {
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var colors = scratchInterpolateColorsArray;
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colors.length = numPoints;
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var i;
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var r0 = color0.red;
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var g0 = color0.green;
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var b0 = color0.blue;
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var a0 = color0.alpha;
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var r1 = color1.red;
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var g1 = color1.green;
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var b1 = color1.blue;
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var a1 = color1.alpha;
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if (Color.Color.equals(color0, color1)) {
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for (i = 0; i < numPoints; i++) {
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colors[i] = Color.Color.clone(color0);
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}
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return colors;
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}
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var redPerVertex = (r1 - r0) / numPoints;
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var greenPerVertex = (g1 - g0) / numPoints;
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var bluePerVertex = (b1 - b0) / numPoints;
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var alphaPerVertex = (a1 - a0) / numPoints;
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for (i = 0; i < numPoints; i++) {
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colors[i] = new Color.Color(
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r0 + i * redPerVertex,
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g0 + i * greenPerVertex,
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b0 + i * bluePerVertex,
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a0 + i * alphaPerVertex
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);
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}
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return colors;
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}
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/**
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* A description of a polyline modeled as a line strip; the first two positions define a line segment,
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* and each additional position defines a line segment from the previous position. The polyline is capable of
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* displaying with a material.
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*
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* @alias PolylineGeometry
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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 {Cartesian3[]} options.positions An array of {@link Cartesian3} defining the positions in the polyline as a line strip.
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* @param {Number} [options.width=1.0] The width in pixels.
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* @param {Color[]} [options.colors] An Array of {@link Color} defining the per vertex or per segment colors.
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* @param {Boolean} [options.colorsPerVertex=false] A boolean that determines whether the colors will be flat across each segment of the line or interpolated across the vertices.
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* @param {ArcType} [options.arcType=ArcType.GEODESIC] The type of line the polyline segments must follow.
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* @param {Number} [options.granularity=CesiumMath.RADIANS_PER_DEGREE] The distance, in radians, between each latitude and longitude if options.arcType is not ArcType.NONE. Determines the number of positions in the buffer.
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* @param {VertexFormat} [options.vertexFormat=VertexFormat.DEFAULT] The vertex attributes to be computed.
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* @param {Ellipsoid} [options.ellipsoid=Ellipsoid.WGS84] The ellipsoid to be used as a reference.
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*
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* @exception {DeveloperError} At least two positions are required.
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* @exception {DeveloperError} width must be greater than or equal to one.
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* @exception {DeveloperError} colors has an invalid length.
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*
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* @see PolylineGeometry#createGeometry
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*
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* @demo {@link https://sandcastle.cesium.com/index.html?src=Polyline.html|Cesium Sandcastle Polyline Demo}
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*
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* @example
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* // A polyline with two connected line segments
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* var polyline = new Cesium.PolylineGeometry({
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* positions : Cesium.Cartesian3.fromDegreesArray([
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* 0.0, 0.0,
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* 5.0, 0.0,
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* 5.0, 5.0
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* ]),
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* width : 10.0
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* });
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* var geometry = Cesium.PolylineGeometry.createGeometry(polyline);
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*/
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function PolylineGeometry(options) {
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options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
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var positions = options.positions;
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var colors = options.colors;
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var width = when.defaultValue(options.width, 1.0);
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var colorsPerVertex = when.defaultValue(options.colorsPerVertex, false);
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//>>includeStart('debug', pragmas.debug);
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if (!when.defined(positions) || positions.length < 2) {
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throw new Check.DeveloperError("At least two positions are required.");
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}
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if (typeof width !== "number") {
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throw new Check.DeveloperError("width must be a number");
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}
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if (
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when.defined(colors) &&
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((colorsPerVertex && colors.length < positions.length) ||
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(!colorsPerVertex && colors.length < positions.length - 1))
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) {
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throw new Check.DeveloperError("colors has an invalid length.");
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}
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//>>includeEnd('debug');
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this._positions = positions;
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this._colors = colors;
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this._width = width;
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this._colorsPerVertex = colorsPerVertex;
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this._vertexFormat = VertexFormat.VertexFormat.clone(
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when.defaultValue(options.vertexFormat, VertexFormat.VertexFormat.DEFAULT)
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);
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this._arcType = when.defaultValue(options.arcType, ArcType.ArcType.GEODESIC);
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this._granularity = when.defaultValue(
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options.granularity,
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_Math.CesiumMath.RADIANS_PER_DEGREE
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);
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this._ellipsoid = Cartesian2.Ellipsoid.clone(
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when.defaultValue(options.ellipsoid, Cartesian2.Ellipsoid.WGS84)
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);
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this._workerName = "createPolylineGeometry";
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var numComponents = 1 + positions.length * Cartesian2.Cartesian3.packedLength;
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numComponents += when.defined(colors) ? 1 + colors.length * Color.Color.packedLength : 1;
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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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this.packedLength =
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numComponents + Cartesian2.Ellipsoid.packedLength + VertexFormat.VertexFormat.packedLength + 4;
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}
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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 {PolylineGeometry} 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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PolylineGeometry.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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var i;
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var positions = value._positions;
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var length = positions.length;
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array[startingIndex++] = length;
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for (i = 0; i < length; ++i, startingIndex += Cartesian2.Cartesian3.packedLength) {
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Cartesian2.Cartesian3.pack(positions[i], array, startingIndex);
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}
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var colors = value._colors;
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length = when.defined(colors) ? colors.length : 0.0;
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array[startingIndex++] = length;
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for (i = 0; i < length; ++i, startingIndex += Color.Color.packedLength) {
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Color.Color.pack(colors[i], array, startingIndex);
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}
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Cartesian2.Ellipsoid.pack(value._ellipsoid, array, startingIndex);
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startingIndex += Cartesian2.Ellipsoid.packedLength;
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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._width;
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array[startingIndex++] = value._colorsPerVertex ? 1.0 : 0.0;
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array[startingIndex++] = value._arcType;
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array[startingIndex] = value._granularity;
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return array;
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};
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var scratchEllipsoid = Cartesian2.Ellipsoid.clone(Cartesian2.Ellipsoid.UNIT_SPHERE);
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var scratchVertexFormat = new VertexFormat.VertexFormat();
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var scratchOptions = {
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positions: undefined,
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colors: undefined,
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ellipsoid: scratchEllipsoid,
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vertexFormat: scratchVertexFormat,
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width: undefined,
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colorsPerVertex: undefined,
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arcType: undefined,
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granularity: 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 {PolylineGeometry} [result] The object into which to store the result.
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* @returns {PolylineGeometry} The modified result parameter or a new PolylineGeometry instance if one was not provided.
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*/
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PolylineGeometry.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 i;
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var length = array[startingIndex++];
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var positions = new Array(length);
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for (i = 0; i < length; ++i, startingIndex += Cartesian2.Cartesian3.packedLength) {
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positions[i] = Cartesian2.Cartesian3.unpack(array, startingIndex);
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}
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length = array[startingIndex++];
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var colors = length > 0 ? new Array(length) : undefined;
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for (i = 0; i < length; ++i, startingIndex += Color.Color.packedLength) {
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colors[i] = Color.Color.unpack(array, startingIndex);
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}
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var ellipsoid = Cartesian2.Ellipsoid.unpack(array, startingIndex, scratchEllipsoid);
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startingIndex += Cartesian2.Ellipsoid.packedLength;
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var vertexFormat = VertexFormat.VertexFormat.unpack(
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array,
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startingIndex,
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scratchVertexFormat
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);
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startingIndex += VertexFormat.VertexFormat.packedLength;
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var width = array[startingIndex++];
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var colorsPerVertex = array[startingIndex++] === 1.0;
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var arcType = array[startingIndex++];
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var granularity = array[startingIndex];
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if (!when.defined(result)) {
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scratchOptions.positions = positions;
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scratchOptions.colors = colors;
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scratchOptions.width = width;
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scratchOptions.colorsPerVertex = colorsPerVertex;
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scratchOptions.arcType = arcType;
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scratchOptions.granularity = granularity;
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return new PolylineGeometry(scratchOptions);
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}
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result._positions = positions;
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result._colors = colors;
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result._ellipsoid = Cartesian2.Ellipsoid.clone(ellipsoid, result._ellipsoid);
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result._vertexFormat = VertexFormat.VertexFormat.clone(vertexFormat, result._vertexFormat);
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result._width = width;
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result._colorsPerVertex = colorsPerVertex;
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result._arcType = arcType;
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result._granularity = granularity;
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return result;
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};
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var scratchCartesian3 = new Cartesian2.Cartesian3();
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var scratchPosition = new Cartesian2.Cartesian3();
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var scratchPrevPosition = new Cartesian2.Cartesian3();
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var scratchNextPosition = new Cartesian2.Cartesian3();
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/**
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* Computes the geometric representation of a polyline, including its vertices, indices, and a bounding sphere.
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*
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* @param {PolylineGeometry} polylineGeometry A description of the polyline.
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* @returns {Geometry|undefined} The computed vertices and indices.
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*/
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PolylineGeometry.createGeometry = function (polylineGeometry) {
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var width = polylineGeometry._width;
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var vertexFormat = polylineGeometry._vertexFormat;
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var colors = polylineGeometry._colors;
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var colorsPerVertex = polylineGeometry._colorsPerVertex;
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var arcType = polylineGeometry._arcType;
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var granularity = polylineGeometry._granularity;
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var ellipsoid = polylineGeometry._ellipsoid;
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var i;
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var j;
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var k;
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var positions = arrayRemoveDuplicates.arrayRemoveDuplicates(
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polylineGeometry._positions,
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Cartesian2.Cartesian3.equalsEpsilon
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);
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var positionsLength = positions.length;
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// A width of a pixel or less is not a valid geometry, but in order to support external data
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// that may have errors we treat this as an empty geometry.
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if (positionsLength < 2 || width <= 0.0) {
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return undefined;
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}
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if (arcType === ArcType.ArcType.GEODESIC || arcType === ArcType.ArcType.RHUMB) {
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var subdivisionSize;
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var numberOfPointsFunction;
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if (arcType === ArcType.ArcType.GEODESIC) {
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subdivisionSize = _Math.CesiumMath.chordLength(
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granularity,
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ellipsoid.maximumRadius
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);
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numberOfPointsFunction = PolylinePipeline.PolylinePipeline.numberOfPoints;
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} else {
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subdivisionSize = granularity;
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numberOfPointsFunction = PolylinePipeline.PolylinePipeline.numberOfPointsRhumbLine;
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}
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var heights = PolylinePipeline.PolylinePipeline.extractHeights(positions, ellipsoid);
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if (when.defined(colors)) {
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var colorLength = 1;
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for (i = 0; i < positionsLength - 1; ++i) {
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colorLength += numberOfPointsFunction(
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positions[i],
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positions[i + 1],
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subdivisionSize
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);
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}
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var newColors = new Array(colorLength);
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var newColorIndex = 0;
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for (i = 0; i < positionsLength - 1; ++i) {
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var p0 = positions[i];
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var p1 = positions[i + 1];
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var c0 = colors[i];
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var numColors = numberOfPointsFunction(p0, p1, subdivisionSize);
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if (colorsPerVertex && i < colorLength) {
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var c1 = colors[i + 1];
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var interpolatedColors = interpolateColors(p0, p1, c0, c1, numColors);
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var interpolatedColorsLength = interpolatedColors.length;
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for (j = 0; j < interpolatedColorsLength; ++j) {
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newColors[newColorIndex++] = interpolatedColors[j];
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}
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} else {
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for (j = 0; j < numColors; ++j) {
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newColors[newColorIndex++] = Color.Color.clone(c0);
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}
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}
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}
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newColors[newColorIndex] = Color.Color.clone(colors[colors.length - 1]);
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colors = newColors;
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scratchInterpolateColorsArray.length = 0;
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}
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if (arcType === ArcType.ArcType.GEODESIC) {
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positions = PolylinePipeline.PolylinePipeline.generateCartesianArc({
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positions: positions,
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minDistance: subdivisionSize,
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ellipsoid: ellipsoid,
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height: heights,
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});
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} else {
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positions = PolylinePipeline.PolylinePipeline.generateCartesianRhumbArc({
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positions: positions,
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granularity: subdivisionSize,
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ellipsoid: ellipsoid,
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height: heights,
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});
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}
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}
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positionsLength = positions.length;
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var size = positionsLength * 4.0 - 4.0;
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var finalPositions = new Float64Array(size * 3);
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var prevPositions = new Float64Array(size * 3);
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var nextPositions = new Float64Array(size * 3);
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var expandAndWidth = new Float32Array(size * 2);
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var st = vertexFormat.st ? new Float32Array(size * 2) : undefined;
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var finalColors = when.defined(colors) ? new Uint8Array(size * 4) : undefined;
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var positionIndex = 0;
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var expandAndWidthIndex = 0;
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var stIndex = 0;
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var colorIndex = 0;
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var position;
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for (j = 0; j < positionsLength; ++j) {
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if (j === 0) {
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position = scratchCartesian3;
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Cartesian2.Cartesian3.subtract(positions[0], positions[1], position);
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Cartesian2.Cartesian3.add(positions[0], position, position);
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} else {
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position = positions[j - 1];
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}
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Cartesian2.Cartesian3.clone(position, scratchPrevPosition);
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Cartesian2.Cartesian3.clone(positions[j], scratchPosition);
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if (j === positionsLength - 1) {
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position = scratchCartesian3;
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Cartesian2.Cartesian3.subtract(
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positions[positionsLength - 1],
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positions[positionsLength - 2],
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position
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);
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Cartesian2.Cartesian3.add(positions[positionsLength - 1], position, position);
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} else {
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position = positions[j + 1];
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}
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Cartesian2.Cartesian3.clone(position, scratchNextPosition);
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var color0, color1;
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if (when.defined(finalColors)) {
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if (j !== 0 && !colorsPerVertex) {
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color0 = colors[j - 1];
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} else {
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color0 = colors[j];
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}
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if (j !== positionsLength - 1) {
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color1 = colors[j];
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}
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}
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var startK = j === 0 ? 2 : 0;
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var endK = j === positionsLength - 1 ? 2 : 4;
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for (k = startK; k < endK; ++k) {
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Cartesian2.Cartesian3.pack(scratchPosition, finalPositions, positionIndex);
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Cartesian2.Cartesian3.pack(scratchPrevPosition, prevPositions, positionIndex);
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Cartesian2.Cartesian3.pack(scratchNextPosition, nextPositions, positionIndex);
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positionIndex += 3;
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var direction = k - 2 < 0 ? -1.0 : 1.0;
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expandAndWidth[expandAndWidthIndex++] = 2 * (k % 2) - 1; // expand direction
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expandAndWidth[expandAndWidthIndex++] = direction * width;
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if (vertexFormat.st) {
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st[stIndex++] = j / (positionsLength - 1);
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st[stIndex++] = Math.max(expandAndWidth[expandAndWidthIndex - 2], 0.0);
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}
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if (when.defined(finalColors)) {
|
|
var color = k < 2 ? color0 : color1;
|
|
|
|
finalColors[colorIndex++] = Color.Color.floatToByte(color.red);
|
|
finalColors[colorIndex++] = Color.Color.floatToByte(color.green);
|
|
finalColors[colorIndex++] = Color.Color.floatToByte(color.blue);
|
|
finalColors[colorIndex++] = Color.Color.floatToByte(color.alpha);
|
|
}
|
|
}
|
|
}
|
|
|
|
var attributes = new GeometryAttributes.GeometryAttributes();
|
|
|
|
attributes.position = new GeometryAttribute.GeometryAttribute({
|
|
componentDatatype: ComponentDatatype.ComponentDatatype.DOUBLE,
|
|
componentsPerAttribute: 3,
|
|
values: finalPositions,
|
|
});
|
|
|
|
attributes.prevPosition = new GeometryAttribute.GeometryAttribute({
|
|
componentDatatype: ComponentDatatype.ComponentDatatype.DOUBLE,
|
|
componentsPerAttribute: 3,
|
|
values: prevPositions,
|
|
});
|
|
|
|
attributes.nextPosition = new GeometryAttribute.GeometryAttribute({
|
|
componentDatatype: ComponentDatatype.ComponentDatatype.DOUBLE,
|
|
componentsPerAttribute: 3,
|
|
values: nextPositions,
|
|
});
|
|
|
|
attributes.expandAndWidth = new GeometryAttribute.GeometryAttribute({
|
|
componentDatatype: ComponentDatatype.ComponentDatatype.FLOAT,
|
|
componentsPerAttribute: 2,
|
|
values: expandAndWidth,
|
|
});
|
|
|
|
if (vertexFormat.st) {
|
|
attributes.st = new GeometryAttribute.GeometryAttribute({
|
|
componentDatatype: ComponentDatatype.ComponentDatatype.FLOAT,
|
|
componentsPerAttribute: 2,
|
|
values: st,
|
|
});
|
|
}
|
|
|
|
if (when.defined(finalColors)) {
|
|
attributes.color = new GeometryAttribute.GeometryAttribute({
|
|
componentDatatype: ComponentDatatype.ComponentDatatype.UNSIGNED_BYTE,
|
|
componentsPerAttribute: 4,
|
|
values: finalColors,
|
|
normalize: true,
|
|
});
|
|
}
|
|
|
|
var indices = IndexDatatype.IndexDatatype.createTypedArray(size, positionsLength * 6 - 6);
|
|
var index = 0;
|
|
var indicesIndex = 0;
|
|
var length = positionsLength - 1.0;
|
|
for (j = 0; j < length; ++j) {
|
|
indices[indicesIndex++] = index;
|
|
indices[indicesIndex++] = index + 2;
|
|
indices[indicesIndex++] = index + 1;
|
|
|
|
indices[indicesIndex++] = index + 1;
|
|
indices[indicesIndex++] = index + 2;
|
|
indices[indicesIndex++] = index + 3;
|
|
|
|
index += 4;
|
|
}
|
|
|
|
return new GeometryAttribute.Geometry({
|
|
attributes: attributes,
|
|
indices: indices,
|
|
primitiveType: GeometryAttribute.PrimitiveType.TRIANGLES,
|
|
boundingSphere: Transforms.BoundingSphere.fromPoints(positions),
|
|
geometryType: GeometryAttribute.GeometryType.POLYLINES,
|
|
});
|
|
};
|
|
|
|
function createPolylineGeometry(polylineGeometry, offset) {
|
|
if (when.defined(offset)) {
|
|
polylineGeometry = PolylineGeometry.unpack(polylineGeometry, offset);
|
|
}
|
|
polylineGeometry._ellipsoid = Cartesian2.Ellipsoid.clone(polylineGeometry._ellipsoid);
|
|
return PolylineGeometry.createGeometry(polylineGeometry);
|
|
}
|
|
|
|
return createPolylineGeometry;
|
|
|
|
});
|
|
//# sourceMappingURL=createPolylineGeometry.js.map
|