cesium
Version:
CesiumJS is a JavaScript library for creating 3D globes and 2D maps in a web browser without a plugin.
211 lines (176 loc) • 10.1 kB
JavaScript
/* This file is automatically rebuilt by the Cesium build process. */
define(['./when-e6e3e713', './Check-1df6b9a0', './Math-c5f6c994', './Cartesian2-1d7364fa', './Transforms-943e8463', './RuntimeError-717c34db', './WebGLConstants-7f7d68ac', './ComponentDatatype-2b8834a4', './GeometryAttribute-3a303898', './GeometryAttributes-6cf4559b', './AttributeCompression-d68d64ef', './GeometryPipeline-2d6c52b2', './EncodedCartesian3-d723731d', './IndexDatatype-e2961542', './IntersectionTests-c05f88ce', './Plane-2e419ea5', './GeometryInstance-9c21278b', './arrayRemoveDuplicates-11ba5123', './EllipsoidTangentPlane-c3f1b2da', './OrientedBoundingBox-02d47ca6', './CoplanarPolygonGeometryLibrary-7d96e238', './ArcType-4e1c0bc3', './EllipsoidRhumbLine-0dab698e', './PolygonPipeline-7dc7d5f5', './PolygonGeometryLibrary-010eebcf'], function (when, Check, _Math, Cartesian2, Transforms, RuntimeError, WebGLConstants, ComponentDatatype, GeometryAttribute, GeometryAttributes, AttributeCompression, GeometryPipeline, EncodedCartesian3, IndexDatatype, IntersectionTests, Plane, GeometryInstance, arrayRemoveDuplicates, EllipsoidTangentPlane, OrientedBoundingBox, CoplanarPolygonGeometryLibrary, ArcType, EllipsoidRhumbLine, PolygonPipeline, PolygonGeometryLibrary) { 'use strict';
function createGeometryFromPositions(positions){
var length = positions.length;
var flatPositions = new Float64Array(length * 3);
var indices = IndexDatatype.IndexDatatype.createTypedArray(length, length * 2);
var positionIndex = 0;
var index = 0;
for (var i = 0; i < length; i++) {
var position = positions[i];
flatPositions[positionIndex++] = position.x;
flatPositions[positionIndex++] = position.y;
flatPositions[positionIndex++] = position.z;
indices[index++] = i;
indices[index++] = (i + 1) % length;
}
var attributes = new GeometryAttributes.GeometryAttributes({
position: new GeometryAttribute.GeometryAttribute({
componentDatatype : ComponentDatatype.ComponentDatatype.DOUBLE,
componentsPerAttribute : 3,
values : flatPositions
})
});
return new GeometryAttribute.Geometry({
attributes : attributes,
indices : indices,
primitiveType : GeometryAttribute.PrimitiveType.LINES
});
}
/**
* A description of the outline of a polygon composed of arbitrary coplanar positions.
*
* @alias CoplanarPolygonOutlineGeometry
* @constructor
*
* @param {Object} options Object with the following properties:
* @param {PolygonHierarchy} options.polygonHierarchy A polygon hierarchy that can include holes.
*
* @see CoplanarPolygonOutlineGeometry.createGeometry
*
* @example
* var polygonOutline = new Cesium.CoplanarPolygonOutlineGeometry({
* positions : Cesium.Cartesian3.fromDegreesArrayHeights([
* -90.0, 30.0, 0.0,
* -90.0, 30.0, 1000.0,
* -80.0, 30.0, 1000.0,
* -80.0, 30.0, 0.0
* ])
* });
* var geometry = Cesium.CoplanarPolygonOutlineGeometry.createGeometry(polygonOutline);
*/
function CoplanarPolygonOutlineGeometry(options) {
options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
var polygonHierarchy = options.polygonHierarchy;
//>>includeStart('debug', pragmas.debug);
Check.Check.defined('options.polygonHierarchy', polygonHierarchy);
//>>includeEnd('debug');
this._polygonHierarchy = polygonHierarchy;
this._workerName = 'createCoplanarPolygonOutlineGeometry';
/**
* The number of elements used to pack the object into an array.
* @type {Number}
*/
this.packedLength = PolygonGeometryLibrary.PolygonGeometryLibrary.computeHierarchyPackedLength(polygonHierarchy) + 1;
}
/**
* A description of a coplanar polygon outline from an array of positions.
*
* @param {Object} options Object with the following properties:
* @param {Cartesian3[]} options.positions An array of positions that defined the corner points of the polygon.
* @returns {CoplanarPolygonOutlineGeometry}
*/
CoplanarPolygonOutlineGeometry.fromPositions = function(options) {
options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
//>>includeStart('debug', pragmas.debug);
Check.Check.defined('options.positions', options.positions);
//>>includeEnd('debug');
var newOptions = {
polygonHierarchy : {
positions : options.positions
}
};
return new CoplanarPolygonOutlineGeometry(newOptions);
};
/**
* Stores the provided instance into the provided array.
*
* @param {CoplanarPolygonOutlineGeometry} 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
*/
CoplanarPolygonOutlineGeometry.pack = function(value, array, startingIndex) {
//>>includeStart('debug', pragmas.debug);
Check.Check.typeOf.object('value', value);
Check.Check.defined('array', array);
//>>includeEnd('debug');
startingIndex = when.defaultValue(startingIndex, 0);
startingIndex = PolygonGeometryLibrary.PolygonGeometryLibrary.packPolygonHierarchy(value._polygonHierarchy, array, startingIndex);
array[startingIndex] = value.packedLength;
return array;
};
var scratchOptions = {
polygonHierarchy : {}
};
/**
* 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 {CoplanarPolygonOutlineGeometry} [result] The object into which to store the result.
* @returns {CoplanarPolygonOutlineGeometry} The modified result parameter or a new CoplanarPolygonOutlineGeometry instance if one was not provided.
*/
CoplanarPolygonOutlineGeometry.unpack = function(array, startingIndex, result) {
//>>includeStart('debug', pragmas.debug);
Check.Check.defined('array', array);
//>>includeEnd('debug');
startingIndex = when.defaultValue(startingIndex, 0);
var polygonHierarchy = PolygonGeometryLibrary.PolygonGeometryLibrary.unpackPolygonHierarchy(array, startingIndex);
startingIndex = polygonHierarchy.startingIndex;
delete polygonHierarchy.startingIndex;
var packedLength = array[startingIndex];
if (!when.defined(result)) {
result = new CoplanarPolygonOutlineGeometry(scratchOptions);
}
result._polygonHierarchy = polygonHierarchy;
result.packedLength = packedLength;
return result;
};
/**
* Computes the geometric representation of an arbitrary coplanar polygon, including its vertices, indices, and a bounding sphere.
*
* @param {CoplanarPolygonOutlineGeometry} polygonGeometry A description of the polygon.
* @returns {Geometry|undefined} The computed vertices and indices.
*/
CoplanarPolygonOutlineGeometry.createGeometry = function(polygonGeometry) {
var polygonHierarchy = polygonGeometry._polygonHierarchy;
var outerPositions = polygonHierarchy.positions;
outerPositions = arrayRemoveDuplicates.arrayRemoveDuplicates(outerPositions, Cartesian2.Cartesian3.equalsEpsilon, true);
if (outerPositions.length < 3) {
return;
}
var isValid = CoplanarPolygonGeometryLibrary.CoplanarPolygonGeometryLibrary.validOutline(outerPositions);
if (!isValid) {
return undefined;
}
var polygons = PolygonGeometryLibrary.PolygonGeometryLibrary.polygonOutlinesFromHierarchy(polygonHierarchy, false);
if (polygons.length === 0) {
return undefined;
}
var geometries = [];
for (var i = 0; i < polygons.length; i++) {
var geometryInstance = new GeometryInstance.GeometryInstance({
geometry : createGeometryFromPositions(polygons[i])
});
geometries.push(geometryInstance);
}
var geometry = GeometryPipeline.GeometryPipeline.combineInstances(geometries)[0];
var boundingSphere = Transforms.BoundingSphere.fromPoints(polygonHierarchy.positions);
return new GeometryAttribute.Geometry({
attributes : geometry.attributes,
indices : geometry.indices,
primitiveType : geometry.primitiveType,
boundingSphere : boundingSphere
});
};
function createCoplanarPolygonOutlineGeometry(polygonGeometry, offset) {
if (when.defined(offset)) {
polygonGeometry = CoplanarPolygonOutlineGeometry.unpack(polygonGeometry, offset);
}
polygonGeometry._ellipsoid = Cartesian2.Ellipsoid.clone(polygonGeometry._ellipsoid);
return CoplanarPolygonOutlineGeometry.createGeometry(polygonGeometry);
}
return createCoplanarPolygonOutlineGeometry;
});