377 lines
15 KiB
JavaScript
377 lines
15 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', './Cartographic-fe4be337', './Cartesian2-85064f09', './BoundingSphere-775c5788'], function (exports, when, Check, Cartographic, Cartesian2, BoundingSphere) { 'use strict';
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/**
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* A bounding rectangle given by a corner, width and height.
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* @alias BoundingRectangle
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* @constructor
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*
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* @param {Number} [x=0.0] The x coordinate of the rectangle.
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* @param {Number} [y=0.0] The y coordinate of the rectangle.
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* @param {Number} [width=0.0] The width of the rectangle.
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* @param {Number} [height=0.0] The height of the rectangle.
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*
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* @see BoundingSphere
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* @see Packable
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*/
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function BoundingRectangle(x, y, width, height) {
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/**
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* The x coordinate of the rectangle.
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* @type {Number}
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* @default 0.0
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*/
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this.x = when.defaultValue(x, 0.0);
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/**
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* The y coordinate of the rectangle.
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* @type {Number}
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* @default 0.0
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*/
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this.y = when.defaultValue(y, 0.0);
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/**
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* The width of the rectangle.
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* @type {Number}
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* @default 0.0
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*/
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this.width = when.defaultValue(width, 0.0);
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/**
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* The height of the rectangle.
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* @type {Number}
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* @default 0.0
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*/
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this.height = when.defaultValue(height, 0.0);
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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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BoundingRectangle.packedLength = 4;
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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 {BoundingRectangle} 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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BoundingRectangle.pack = function(value, array, startingIndex) {
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//>>includeStart('debug', pragmas.debug);
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Check.Check.typeOf.object('value', value);
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Check.Check.defined('array', array);
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//>>includeEnd('debug');
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startingIndex = when.defaultValue(startingIndex, 0);
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array[startingIndex++] = value.x;
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array[startingIndex++] = value.y;
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array[startingIndex++] = value.width;
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array[startingIndex] = value.height;
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return array;
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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 {BoundingRectangle} [result] The object into which to store the result.
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* @returns {BoundingRectangle} The modified result parameter or a new BoundingRectangle instance if one was not provided.
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*/
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BoundingRectangle.unpack = function(array, startingIndex, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.Check.defined('array', array);
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//>>includeEnd('debug');
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startingIndex = when.defaultValue(startingIndex, 0);
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if (!when.defined(result)) {
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result = new BoundingRectangle();
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}
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result.x = array[startingIndex++];
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result.y = array[startingIndex++];
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result.width = array[startingIndex++];
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result.height = array[startingIndex];
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return result;
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};
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/**
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* Computes a bounding rectangle enclosing the list of 2D points.
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* The rectangle is oriented with the corner at the bottom left.
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*
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* @param {Cartesian2[]} positions List of points that the bounding rectangle will enclose. Each point must have <code>x</code> and <code>y</code> properties.
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* @param {BoundingRectangle} [result] The object onto which to store the result.
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* @returns {BoundingRectangle} The modified result parameter or a new BoundingRectangle instance if one was not provided.
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*/
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BoundingRectangle.fromPoints = function(positions, result) {
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if (!when.defined(result)) {
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result = new BoundingRectangle();
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}
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if (!when.defined(positions) || positions.length === 0) {
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result.x = 0;
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result.y = 0;
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result.width = 0;
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result.height = 0;
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return result;
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}
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var length = positions.length;
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var minimumX = positions[0].x;
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var minimumY = positions[0].y;
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var maximumX = positions[0].x;
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var maximumY = positions[0].y;
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for ( var i = 1; i < length; i++) {
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var p = positions[i];
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var x = p.x;
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var y = p.y;
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minimumX = Math.min(x, minimumX);
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maximumX = Math.max(x, maximumX);
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minimumY = Math.min(y, minimumY);
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maximumY = Math.max(y, maximumY);
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}
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result.x = minimumX;
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result.y = minimumY;
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result.width = maximumX - minimumX;
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result.height = maximumY - minimumY;
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return result;
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};
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var defaultProjection = new BoundingSphere.GeographicProjection();
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var fromRectangleLowerLeft = new Cartographic.Cartographic();
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var fromRectangleUpperRight = new Cartographic.Cartographic();
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/**
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* Computes a bounding rectangle from a rectangle.
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*
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* @param {Rectangle} rectangle The valid rectangle used to create a bounding rectangle.
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* @param {Object} [projection=GeographicProjection] The projection used to project the rectangle into 2D.
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* @param {BoundingRectangle} [result] The object onto which to store the result.
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* @returns {BoundingRectangle} The modified result parameter or a new BoundingRectangle instance if one was not provided.
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*/
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BoundingRectangle.fromRectangle = function(rectangle, projection, result) {
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if (!when.defined(result)) {
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result = new BoundingRectangle();
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}
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if (!when.defined(rectangle)) {
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result.x = 0;
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result.y = 0;
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result.width = 0;
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result.height = 0;
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return result;
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}
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projection = when.defaultValue(projection, defaultProjection);
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var lowerLeft = projection.project(Cartesian2.Rectangle.southwest(rectangle, fromRectangleLowerLeft));
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var upperRight = projection.project(Cartesian2.Rectangle.northeast(rectangle, fromRectangleUpperRight));
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Cartesian2.Cartesian2.subtract(upperRight, lowerLeft, upperRight);
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result.x = lowerLeft.x;
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result.y = lowerLeft.y;
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result.width = upperRight.x;
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result.height = upperRight.y;
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return result;
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};
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/**
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* Duplicates a BoundingRectangle instance.
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*
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* @param {BoundingRectangle} rectangle The bounding rectangle to duplicate.
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* @param {BoundingRectangle} [result] The object onto which to store the result.
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* @returns {BoundingRectangle} The modified result parameter or a new BoundingRectangle instance if one was not provided. (Returns undefined if rectangle is undefined)
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*/
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BoundingRectangle.clone = function(rectangle, result) {
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if (!when.defined(rectangle)) {
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return undefined;
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}
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if (!when.defined(result)) {
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return new BoundingRectangle(rectangle.x, rectangle.y, rectangle.width, rectangle.height);
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}
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result.x = rectangle.x;
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result.y = rectangle.y;
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result.width = rectangle.width;
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result.height = rectangle.height;
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return result;
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};
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/**
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* Computes a bounding rectangle that is the union of the left and right bounding rectangles.
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*
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* @param {BoundingRectangle} left A rectangle to enclose in bounding rectangle.
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* @param {BoundingRectangle} right A rectangle to enclose in a bounding rectangle.
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* @param {BoundingRectangle} [result] The object onto which to store the result.
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* @returns {BoundingRectangle} The modified result parameter or a new BoundingRectangle instance if one was not provided.
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*/
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BoundingRectangle.union = function(left, right, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.Check.typeOf.object('left', left);
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Check.Check.typeOf.object('right', right);
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//>>includeEnd('debug');
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if (!when.defined(result)) {
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result = new BoundingRectangle();
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}
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var lowerLeftX = Math.min(left.x, right.x);
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var lowerLeftY = Math.min(left.y, right.y);
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var upperRightX = Math.max(left.x + left.width, right.x + right.width);
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var upperRightY = Math.max(left.y + left.height, right.y + right.height);
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result.x = lowerLeftX;
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result.y = lowerLeftY;
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result.width = upperRightX - lowerLeftX;
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result.height = upperRightY - lowerLeftY;
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return result;
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};
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/**
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* Computes a bounding rectangle by enlarging the provided rectangle until it contains the provided point.
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*
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* @param {BoundingRectangle} rectangle A rectangle to expand.
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* @param {Cartesian2} point A point to enclose in a bounding rectangle.
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* @param {BoundingRectangle} [result] The object onto which to store the result.
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* @returns {BoundingRectangle} The modified result parameter or a new BoundingRectangle instance if one was not provided.
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*/
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BoundingRectangle.expand = function(rectangle, point, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.Check.typeOf.object('rectangle', rectangle);
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Check.Check.typeOf.object('point', point);
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//>>includeEnd('debug');
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result = BoundingRectangle.clone(rectangle, result);
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var width = point.x - result.x;
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var height = point.y - result.y;
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if (width > result.width) {
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result.width = width;
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} else if (width < 0) {
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result.width -= width;
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result.x = point.x;
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}
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if (height > result.height) {
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result.height = height;
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} else if (height < 0) {
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result.height -= height;
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result.y = point.y;
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}
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return result;
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};
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/**
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* Determines if two rectangles intersect.
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*
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* @param {BoundingRectangle} left A rectangle to check for intersection.
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* @param {BoundingRectangle} right The other rectangle to check for intersection.
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* @returns {Intersect} <code>Intersect.INTESECTING</code> if the rectangles intersect, <code>Intersect.OUTSIDE</code> otherwise.
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*/
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BoundingRectangle.intersect = function(left, right) {
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//>>includeStart('debug', pragmas.debug);
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Check.Check.typeOf.object('left', left);
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Check.Check.typeOf.object('right', right);
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//>>includeEnd('debug');
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var leftX = left.x;
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var leftY = left.y;
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var rightX = right.x;
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var rightY = right.y;
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if (!(leftX > rightX + right.width ||
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leftX + left.width < rightX ||
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leftY + left.height < rightY ||
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leftY > rightY + right.height)) {
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return BoundingSphere.Intersect.INTERSECTING;
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}
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return BoundingSphere.Intersect.OUTSIDE;
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};
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/**
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* Compares the provided BoundingRectangles componentwise and returns
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* <code>true</code> if they are equal, <code>false</code> otherwise.
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*
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* @param {BoundingRectangle} [left] The first BoundingRectangle.
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* @param {BoundingRectangle} [right] The second BoundingRectangle.
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* @returns {Boolean} <code>true</code> if left and right are equal, <code>false</code> otherwise.
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*/
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BoundingRectangle.equals = function(left, right) {
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return (left === right) ||
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((when.defined(left)) &&
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(when.defined(right)) &&
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(left.x === right.x) &&
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(left.y === right.y) &&
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(left.width === right.width) &&
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(left.height === right.height));
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};
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/**
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* Duplicates this BoundingRectangle instance.
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*
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* @param {BoundingRectangle} [result] The object onto which to store the result.
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* @returns {BoundingRectangle} The modified result parameter or a new BoundingRectangle instance if one was not provided.
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*/
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BoundingRectangle.prototype.clone = function(result) {
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return BoundingRectangle.clone(this, result);
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};
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/**
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* Determines if this rectangle intersects with another.
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*
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* @param {BoundingRectangle} right A rectangle to check for intersection.
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* @returns {Intersect} <code>Intersect.INTESECTING</code> if the rectangles intersect, <code>Intersect.OUTSIDE</code> otherwise.
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*/
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BoundingRectangle.prototype.intersect = function(right) {
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return BoundingRectangle.intersect(this, right);
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};
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/**
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* Compares this BoundingRectangle against the provided BoundingRectangle componentwise and returns
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* <code>true</code> if they are equal, <code>false</code> otherwise.
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*
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* @param {BoundingRectangle} [right] The right hand side BoundingRectangle.
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* @returns {Boolean} <code>true</code> if they are equal, <code>false</code> otherwise.
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*/
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BoundingRectangle.prototype.equals = function(right) {
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return BoundingRectangle.equals(this, right);
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};
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exports.BoundingRectangle = BoundingRectangle;
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});
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