557 lines
24 KiB
JavaScript
557 lines
24 KiB
JavaScript
/**
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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', './Cartesian4-5af5bb24', './Transforms-b2e71640', './IntersectionTests-397d9494', './Plane-8390418f'], function (exports, when, Check, Cartographic, Cartesian2, BoundingSphere, Cartesian4, Transforms, IntersectionTests, Plane) { 'use strict';
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/**
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* Creates an instance of an AxisAlignedBoundingBox from the minimum and maximum points along the x, y, and z axes.
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* @alias AxisAlignedBoundingBox
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* @constructor
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*
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* @param {Cartesian3} [minimum=Cartesian3.ZERO] The minimum point along the x, y, and z axes.
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* @param {Cartesian3} [maximum=Cartesian3.ZERO] The maximum point along the x, y, and z axes.
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* @param {Cartesian3} [center] The center of the box; automatically computed if not supplied.
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*
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* @see BoundingSphere
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* @see BoundingRectangle
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*/
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function AxisAlignedBoundingBox(minimum, maximum, center) {
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/**
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* The minimum point defining the bounding box.
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* @type {Cartesian3}
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* @default {@link Cartesian3.ZERO}
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*/
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this.minimum = Cartographic.Cartesian3.clone(when.defaultValue(minimum, Cartographic.Cartesian3.ZERO));
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/**
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* The maximum point defining the bounding box.
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* @type {Cartesian3}
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* @default {@link Cartesian3.ZERO}
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*/
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this.maximum = Cartographic.Cartesian3.clone(when.defaultValue(maximum, Cartographic.Cartesian3.ZERO));
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//If center was not defined, compute it.
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if (!when.defined(center)) {
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center = Cartographic.Cartesian3.midpoint(this.minimum, this.maximum, new Cartographic.Cartesian3());
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} else {
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center = Cartographic.Cartesian3.clone(center);
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}
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/**
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* The center point of the bounding box.
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* @type {Cartesian3}
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*/
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this.center = center;
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}
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/**
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* Computes an instance of an AxisAlignedBoundingBox. The box is determined by
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* finding the points spaced the farthest apart on the x, y, and z axes.
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*
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* @param {Cartesian3[]} positions List of points that the bounding box will enclose. Each point must have a <code>x</code>, <code>y</code>, and <code>z</code> properties.
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* @param {AxisAlignedBoundingBox} [result] The object onto which to store the result.
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* @returns {AxisAlignedBoundingBox} The modified result parameter or a new AxisAlignedBoundingBox instance if one was not provided.
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*
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* @example
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* // Compute an axis aligned bounding box enclosing two points.
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* var box = Cesium.AxisAlignedBoundingBox.fromPoints([new Cesium.Cartesian3(2, 0, 0), new Cesium.Cartesian3(-2, 0, 0)]);
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*/
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AxisAlignedBoundingBox.fromPoints = function(positions, result) {
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if (!when.defined(result)) {
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result = new AxisAlignedBoundingBox();
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}
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if (!when.defined(positions) || positions.length === 0) {
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result.minimum = Cartographic.Cartesian3.clone(Cartographic.Cartesian3.ZERO, result.minimum);
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result.maximum = Cartographic.Cartesian3.clone(Cartographic.Cartesian3.ZERO, result.maximum);
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result.center = Cartographic.Cartesian3.clone(Cartographic.Cartesian3.ZERO, result.center);
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return result;
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}
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var minimumX = positions[0].x;
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var minimumY = positions[0].y;
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var minimumZ = positions[0].z;
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var maximumX = positions[0].x;
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var maximumY = positions[0].y;
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var maximumZ = positions[0].z;
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var length = positions.length;
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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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var z = p.z;
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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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minimumZ = Math.min(z, minimumZ);
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maximumZ = Math.max(z, maximumZ);
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}
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var minimum = result.minimum;
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minimum.x = minimumX;
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minimum.y = minimumY;
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minimum.z = minimumZ;
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var maximum = result.maximum;
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maximum.x = maximumX;
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maximum.y = maximumY;
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maximum.z = maximumZ;
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result.center = Cartographic.Cartesian3.midpoint(minimum, maximum, result.center);
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return result;
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};
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/**
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* Duplicates a AxisAlignedBoundingBox instance.
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*
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* @param {AxisAlignedBoundingBox} box The bounding box to duplicate.
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* @param {AxisAlignedBoundingBox} [result] The object onto which to store the result.
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* @returns {AxisAlignedBoundingBox} The modified result parameter or a new AxisAlignedBoundingBox instance if none was provided. (Returns undefined if box is undefined)
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*/
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AxisAlignedBoundingBox.clone = function(box, result) {
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if (!when.defined(box)) {
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return undefined;
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}
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if (!when.defined(result)) {
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return new AxisAlignedBoundingBox(box.minimum, box.maximum, box.center);
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}
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result.minimum = Cartographic.Cartesian3.clone(box.minimum, result.minimum);
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result.maximum = Cartographic.Cartesian3.clone(box.maximum, result.maximum);
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result.center = Cartographic.Cartesian3.clone(box.center, result.center);
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return result;
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};
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/**
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* Compares the provided AxisAlignedBoundingBox 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 {AxisAlignedBoundingBox} [left] The first AxisAlignedBoundingBox.
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* @param {AxisAlignedBoundingBox} [right] The second AxisAlignedBoundingBox.
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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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AxisAlignedBoundingBox.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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Cartographic.Cartesian3.equals(left.center, right.center) &&
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Cartographic.Cartesian3.equals(left.minimum, right.minimum) &&
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Cartographic.Cartesian3.equals(left.maximum, right.maximum));
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};
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var intersectScratch = new Cartographic.Cartesian3();
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/**
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* Determines which side of a plane a box is located.
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*
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* @param {AxisAlignedBoundingBox} box The bounding box to test.
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* @param {Plane} plane The plane to test against.
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* @returns {Intersect} {@link Intersect.INSIDE} if the entire box is on the side of the plane
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* the normal is pointing, {@link Intersect.OUTSIDE} if the entire box is
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* on the opposite side, and {@link Intersect.INTERSECTING} if the box
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* intersects the plane.
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*/
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AxisAlignedBoundingBox.intersectPlane = function(box, plane) {
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//>>includeStart('debug', pragmas.debug);
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Check.Check.defined('box', box);
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Check.Check.defined('plane', plane);
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//>>includeEnd('debug');
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intersectScratch = Cartographic.Cartesian3.subtract(box.maximum, box.minimum, intersectScratch);
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var h = Cartographic.Cartesian3.multiplyByScalar(intersectScratch, 0.5, intersectScratch); //The positive half diagonal
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var normal = plane.normal;
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var e = h.x * Math.abs(normal.x) + h.y * Math.abs(normal.y) + h.z * Math.abs(normal.z);
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var s = Cartographic.Cartesian3.dot(box.center, normal) + plane.distance; //signed distance from center
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if (s - e > 0) {
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return BoundingSphere.Intersect.INSIDE;
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}
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if (s + e < 0) {
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//Not in front because normals point inward
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return BoundingSphere.Intersect.OUTSIDE;
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}
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return BoundingSphere.Intersect.INTERSECTING;
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};
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/**
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* Duplicates this AxisAlignedBoundingBox instance.
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*
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* @param {AxisAlignedBoundingBox} [result] The object onto which to store the result.
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* @returns {AxisAlignedBoundingBox} The modified result parameter or a new AxisAlignedBoundingBox instance if one was not provided.
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*/
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AxisAlignedBoundingBox.prototype.clone = function(result) {
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return AxisAlignedBoundingBox.clone(this, result);
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};
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/**
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* Determines which side of a plane this box is located.
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*
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* @param {Plane} plane The plane to test against.
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* @returns {Intersect} {@link Intersect.INSIDE} if the entire box is on the side of the plane
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* the normal is pointing, {@link Intersect.OUTSIDE} if the entire box is
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* on the opposite side, and {@link Intersect.INTERSECTING} if the box
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* intersects the plane.
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*/
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AxisAlignedBoundingBox.prototype.intersectPlane = function(plane) {
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return AxisAlignedBoundingBox.intersectPlane(this, plane);
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};
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/**
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* Compares this AxisAlignedBoundingBox against the provided AxisAlignedBoundingBox 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 {AxisAlignedBoundingBox} [right] The right hand side AxisAlignedBoundingBox.
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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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AxisAlignedBoundingBox.prototype.equals = function(right) {
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return AxisAlignedBoundingBox.equals(this, right);
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};
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var scratchCart4 = new Cartesian4.Cartesian4();
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/**
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* A plane tangent to the provided ellipsoid at the provided origin.
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* If origin is not on the surface of the ellipsoid, it's surface projection will be used.
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* If origin is at the center of the ellipsoid, an exception will be thrown.
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* @alias EllipsoidTangentPlane
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* @constructor
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*
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* @param {Cartesian3} origin The point on the surface of the ellipsoid where the tangent plane touches.
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* @param {Ellipsoid} [ellipsoid=Ellipsoid.WGS84] The ellipsoid to use.
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*
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* @exception {DeveloperError} origin must not be at the center of the ellipsoid.
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*/
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function EllipsoidTangentPlane(origin, ellipsoid) {
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//>>includeStart('debug', pragmas.debug);
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Check.Check.defined('origin', origin);
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//>>includeEnd('debug');
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ellipsoid = when.defaultValue(ellipsoid, Cartesian2.Ellipsoid.WGS84);
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origin = ellipsoid.scaleToGeodeticSurface(origin);
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//>>includeStart('debug', pragmas.debug);
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if (!when.defined(origin)) {
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throw new Check.DeveloperError('origin must not be at the center of the ellipsoid.');
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}
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//>>includeEnd('debug');
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var eastNorthUp = Transforms.Transforms.eastNorthUpToFixedFrame(origin, ellipsoid);
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this._ellipsoid = ellipsoid;
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this._origin = origin;
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this._xAxis = Cartographic.Cartesian3.fromCartesian4(BoundingSphere.Matrix4.getColumn(eastNorthUp, 0, scratchCart4));
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this._yAxis = Cartographic.Cartesian3.fromCartesian4(BoundingSphere.Matrix4.getColumn(eastNorthUp, 1, scratchCart4));
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var normal = Cartographic.Cartesian3.fromCartesian4(BoundingSphere.Matrix4.getColumn(eastNorthUp, 2, scratchCart4));
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this._plane = Plane.Plane.fromPointNormal(origin, normal);
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}
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Object.defineProperties(EllipsoidTangentPlane.prototype, {
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/**
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* Gets the ellipsoid.
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* @memberof EllipsoidTangentPlane.prototype
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* @type {Ellipsoid}
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*/
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ellipsoid : {
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get : function() {
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return this._ellipsoid;
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}
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},
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/**
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* Gets the origin.
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* @memberof EllipsoidTangentPlane.prototype
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* @type {Cartesian3}
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*/
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origin : {
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get : function() {
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return this._origin;
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}
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},
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/**
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* Gets the plane which is tangent to the ellipsoid.
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* @memberof EllipsoidTangentPlane.prototype
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* @readonly
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* @type {Plane}
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*/
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plane : {
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get : function() {
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return this._plane;
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}
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},
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/**
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* Gets the local X-axis (east) of the tangent plane.
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* @memberof EllipsoidTangentPlane.prototype
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* @readonly
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* @type {Cartesian3}
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*/
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xAxis : {
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get : function() {
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return this._xAxis;
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}
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},
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/**
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* Gets the local Y-axis (north) of the tangent plane.
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* @memberof EllipsoidTangentPlane.prototype
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* @readonly
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* @type {Cartesian3}
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*/
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yAxis : {
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get : function() {
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return this._yAxis;
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}
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},
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/**
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* Gets the local Z-axis (up) of the tangent plane.
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* @member EllipsoidTangentPlane.prototype
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* @readonly
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* @type {Cartesian3}
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*/
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zAxis : {
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get : function() {
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return this._plane.normal;
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}
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}
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});
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var tmp = new AxisAlignedBoundingBox();
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/**
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* Creates a new instance from the provided ellipsoid and the center
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* point of the provided Cartesians.
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*
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* @param {Cartesian3} cartesians The list of positions surrounding the center point.
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* @param {Ellipsoid} [ellipsoid=Ellipsoid.WGS84] The ellipsoid to use.
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*/
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EllipsoidTangentPlane.fromPoints = function(cartesians, ellipsoid) {
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//>>includeStart('debug', pragmas.debug);
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Check.Check.defined('cartesians', cartesians);
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//>>includeEnd('debug');
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var box = AxisAlignedBoundingBox.fromPoints(cartesians, tmp);
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return new EllipsoidTangentPlane(box.center, ellipsoid);
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};
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var scratchProjectPointOntoPlaneRay = new IntersectionTests.Ray();
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var scratchProjectPointOntoPlaneCartesian3 = new Cartographic.Cartesian3();
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/**
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* Computes the projection of the provided 3D position onto the 2D plane, radially outward from the {@link EllipsoidTangentPlane.ellipsoid} coordinate system origin.
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*
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* @param {Cartesian3} cartesian The point to project.
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* @param {Cartesian2} [result] The object onto which to store the result.
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* @returns {Cartesian2} The modified result parameter or a new Cartesian2 instance if none was provided. Undefined if there is no intersection point
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*/
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EllipsoidTangentPlane.prototype.projectPointOntoPlane = function(cartesian, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.Check.defined('cartesian', cartesian);
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//>>includeEnd('debug');
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var ray = scratchProjectPointOntoPlaneRay;
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ray.origin = cartesian;
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Cartographic.Cartesian3.normalize(cartesian, ray.direction);
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var intersectionPoint = IntersectionTests.IntersectionTests.rayPlane(ray, this._plane, scratchProjectPointOntoPlaneCartesian3);
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if (!when.defined(intersectionPoint)) {
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Cartographic.Cartesian3.negate(ray.direction, ray.direction);
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intersectionPoint = IntersectionTests.IntersectionTests.rayPlane(ray, this._plane, scratchProjectPointOntoPlaneCartesian3);
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}
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if (when.defined(intersectionPoint)) {
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var v = Cartographic.Cartesian3.subtract(intersectionPoint, this._origin, intersectionPoint);
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var x = Cartographic.Cartesian3.dot(this._xAxis, v);
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var y = Cartographic.Cartesian3.dot(this._yAxis, v);
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if (!when.defined(result)) {
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return new Cartesian2.Cartesian2(x, y);
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}
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result.x = x;
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result.y = y;
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return result;
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}
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return undefined;
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};
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/**
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* Computes the projection of the provided 3D positions onto the 2D plane (where possible), radially outward from the global origin.
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* The resulting array may be shorter than the input array - if a single projection is impossible it will not be included.
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*
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* @see EllipsoidTangentPlane.projectPointOntoPlane
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*
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* @param {Cartesian3[]} cartesians The array of points to project.
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* @param {Cartesian2[]} [result] The array of Cartesian2 instances onto which to store results.
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* @returns {Cartesian2[]} The modified result parameter or a new array of Cartesian2 instances if none was provided.
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*/
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EllipsoidTangentPlane.prototype.projectPointsOntoPlane = function(cartesians, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.Check.defined('cartesians', cartesians);
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//>>includeEnd('debug');
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if (!when.defined(result)) {
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result = [];
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}
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var count = 0;
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var length = cartesians.length;
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for ( var i = 0; i < length; i++) {
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var p = this.projectPointOntoPlane(cartesians[i], result[count]);
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if (when.defined(p)) {
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result[count] = p;
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count++;
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}
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}
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result.length = count;
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return result;
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};
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/**
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* Computes the projection of the provided 3D position onto the 2D plane, along the plane normal.
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*
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* @param {Cartesian3} cartesian The point to project.
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* @param {Cartesian2} [result] The object onto which to store the result.
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* @returns {Cartesian2} The modified result parameter or a new Cartesian2 instance if none was provided.
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*/
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EllipsoidTangentPlane.prototype.projectPointToNearestOnPlane = function(cartesian, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.Check.defined('cartesian', cartesian);
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//>>includeEnd('debug');
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if (!when.defined(result)) {
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result = new Cartesian2.Cartesian2();
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}
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var ray = scratchProjectPointOntoPlaneRay;
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ray.origin = cartesian;
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Cartographic.Cartesian3.clone(this._plane.normal, ray.direction);
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var intersectionPoint = IntersectionTests.IntersectionTests.rayPlane(ray, this._plane, scratchProjectPointOntoPlaneCartesian3);
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if (!when.defined(intersectionPoint)) {
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Cartographic.Cartesian3.negate(ray.direction, ray.direction);
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intersectionPoint = IntersectionTests.IntersectionTests.rayPlane(ray, this._plane, scratchProjectPointOntoPlaneCartesian3);
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}
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|
var v = Cartographic.Cartesian3.subtract(intersectionPoint, this._origin, intersectionPoint);
|
|
var x = Cartographic.Cartesian3.dot(this._xAxis, v);
|
|
var y = Cartographic.Cartesian3.dot(this._yAxis, v);
|
|
|
|
result.x = x;
|
|
result.y = y;
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Computes the projection of the provided 3D positions onto the 2D plane, along the plane normal.
|
|
*
|
|
* @see EllipsoidTangentPlane.projectPointToNearestOnPlane
|
|
*
|
|
* @param {Cartesian3[]} cartesians The array of points to project.
|
|
* @param {Cartesian2[]} [result] The array of Cartesian2 instances onto which to store results.
|
|
* @returns {Cartesian2[]} The modified result parameter or a new array of Cartesian2 instances if none was provided. This will have the same length as <code>cartesians</code>.
|
|
*/
|
|
EllipsoidTangentPlane.prototype.projectPointsToNearestOnPlane = function(cartesians, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
Check.Check.defined('cartesians', cartesians);
|
|
//>>includeEnd('debug');
|
|
|
|
if (!when.defined(result)) {
|
|
result = [];
|
|
}
|
|
|
|
var length = cartesians.length;
|
|
result.length = length;
|
|
for (var i = 0; i < length; i++) {
|
|
result[i] = this.projectPointToNearestOnPlane(cartesians[i], result[i]);
|
|
}
|
|
return result;
|
|
};
|
|
|
|
var projectPointsOntoEllipsoidScratch = new Cartographic.Cartesian3();
|
|
/**
|
|
* Computes the projection of the provided 2D position onto the 3D ellipsoid.
|
|
*
|
|
* @param {Cartesian2} cartesian The points to project.
|
|
* @param {Cartesian3} [result] The Cartesian3 instance to store result.
|
|
* @returns {Cartesian3} The modified result parameter or a new Cartesian3 instance if none was provided.
|
|
*/
|
|
EllipsoidTangentPlane.prototype.projectPointOntoEllipsoid = function(cartesian, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
Check.Check.defined('cartesian', cartesian);
|
|
//>>includeEnd('debug');
|
|
|
|
if (!when.defined(result)) {
|
|
result = new Cartographic.Cartesian3();
|
|
}
|
|
|
|
var ellipsoid = this._ellipsoid;
|
|
var origin = this._origin;
|
|
var xAxis = this._xAxis;
|
|
var yAxis = this._yAxis;
|
|
var tmp = projectPointsOntoEllipsoidScratch;
|
|
|
|
Cartographic.Cartesian3.multiplyByScalar(xAxis, cartesian.x, tmp);
|
|
result = Cartographic.Cartesian3.add(origin, tmp, result);
|
|
Cartographic.Cartesian3.multiplyByScalar(yAxis, cartesian.y, tmp);
|
|
Cartographic.Cartesian3.add(result, tmp, result);
|
|
ellipsoid.scaleToGeocentricSurface(result, result);
|
|
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Computes the projection of the provided 2D positions onto the 3D ellipsoid.
|
|
*
|
|
* @param {Cartesian2[]} cartesians The array of points to project.
|
|
* @param {Cartesian3[]} [result] The array of Cartesian3 instances onto which to store results.
|
|
* @returns {Cartesian3[]} The modified result parameter or a new array of Cartesian3 instances if none was provided.
|
|
*/
|
|
EllipsoidTangentPlane.prototype.projectPointsOntoEllipsoid = function(cartesians, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
Check.Check.defined('cartesians', cartesians);
|
|
//>>includeEnd('debug');
|
|
|
|
var length = cartesians.length;
|
|
if (!when.defined(result)) {
|
|
result = new Array(length);
|
|
} else {
|
|
result.length = length;
|
|
}
|
|
|
|
for ( var i = 0; i < length; ++i) {
|
|
result[i] = this.projectPointOntoEllipsoid(cartesians[i], result[i]);
|
|
}
|
|
|
|
return result;
|
|
};
|
|
|
|
exports.AxisAlignedBoundingBox = AxisAlignedBoundingBox;
|
|
exports.EllipsoidTangentPlane = EllipsoidTangentPlane;
|
|
|
|
});
|