129 lines
5.7 KiB
JavaScript
129 lines
5.7 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(['exports', './Check-70bec281', './Cartographic-fe4be337', './Cartesian2-85064f09', './BoundingSphere-775c5788', './OrientedBoundingBox-0ede1598'], function (exports, Check, Cartographic, Cartesian2, BoundingSphere, OrientedBoundingBox) { 'use strict';
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/**
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* @private
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*/
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var CoplanarPolygonGeometryLibrary = {};
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var scratchIntersectionPoint = new Cartographic.Cartesian3();
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var scratchXAxis = new Cartographic.Cartesian3();
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var scratchYAxis = new Cartographic.Cartesian3();
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var scratchZAxis = new Cartographic.Cartesian3();
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var obbScratch = new OrientedBoundingBox.OrientedBoundingBox();
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CoplanarPolygonGeometryLibrary.validOutline = function(positions) {
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//>>includeStart('debug', pragmas.debug);
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Check.Check.defined('positions', positions);
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//>>includeEnd('debug');
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var orientedBoundingBox = OrientedBoundingBox.OrientedBoundingBox.fromPoints(positions, obbScratch);
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var halfAxes = orientedBoundingBox.halfAxes;
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var xAxis = BoundingSphere.Matrix3.getColumn(halfAxes, 0, scratchXAxis);
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var yAxis = BoundingSphere.Matrix3.getColumn(halfAxes, 1, scratchYAxis);
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var zAxis = BoundingSphere.Matrix3.getColumn(halfAxes, 2, scratchZAxis);
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var xMag = Cartographic.Cartesian3.magnitude(xAxis);
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var yMag = Cartographic.Cartesian3.magnitude(yAxis);
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var zMag = Cartographic.Cartesian3.magnitude(zAxis);
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// If all the points are on a line return undefined because we can't draw a polygon
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return !((xMag === 0 && (yMag === 0 || zMag === 0)) || (yMag === 0 && zMag === 0));
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};
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// call after removeDuplicates
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CoplanarPolygonGeometryLibrary.computeProjectTo2DArguments = function(positions, centerResult, planeAxis1Result, planeAxis2Result) {
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//>>includeStart('debug', pragmas.debug);
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Check.Check.defined('positions', positions);
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Check.Check.defined('centerResult', centerResult);
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Check.Check.defined('planeAxis1Result', planeAxis1Result);
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Check.Check.defined('planeAxis2Result', planeAxis2Result);
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//>>includeEnd('debug');
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var orientedBoundingBox = OrientedBoundingBox.OrientedBoundingBox.fromPoints(positions, obbScratch);
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var halfAxes = orientedBoundingBox.halfAxes;
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var xAxis = BoundingSphere.Matrix3.getColumn(halfAxes, 0, scratchXAxis);
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var yAxis = BoundingSphere.Matrix3.getColumn(halfAxes, 1, scratchYAxis);
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var zAxis = BoundingSphere.Matrix3.getColumn(halfAxes, 2, scratchZAxis);
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var xMag = Cartographic.Cartesian3.magnitude(xAxis);
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var yMag = Cartographic.Cartesian3.magnitude(yAxis);
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var zMag = Cartographic.Cartesian3.magnitude(zAxis);
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var min = Math.min(xMag, yMag, zMag);
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// If all the points are on a line return undefined because we can't draw a polygon
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if ((xMag === 0 && (yMag === 0 || zMag === 0)) || (yMag === 0 && zMag === 0)) {
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return false;
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}
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var planeAxis1;
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var planeAxis2;
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if (min === yMag || min === zMag) {
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planeAxis1 = xAxis;
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}
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if (min === xMag) {
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planeAxis1 = yAxis;
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} else if (min === zMag) {
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planeAxis2 = yAxis;
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}
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if (min === xMag || min === yMag) {
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planeAxis2 = zAxis;
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}
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Cartographic.Cartesian3.normalize(planeAxis1, planeAxis1Result);
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Cartographic.Cartesian3.normalize(planeAxis2, planeAxis2Result);
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Cartographic.Cartesian3.clone(orientedBoundingBox.center, centerResult);
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return true;
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};
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function projectTo2D(position, center, axis1, axis2, result) {
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var v = Cartographic.Cartesian3.subtract(position, center, scratchIntersectionPoint);
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var x = Cartographic.Cartesian3.dot(axis1, v);
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var y = Cartographic.Cartesian3.dot(axis2, v);
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return Cartesian2.Cartesian2.fromElements(x, y, result);
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}
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CoplanarPolygonGeometryLibrary.createProjectPointsTo2DFunction = function(center, axis1, axis2) {
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return function(positions) {
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var positionResults = new Array(positions.length);
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for (var i = 0; i < positions.length; i++) {
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positionResults[i] = projectTo2D(positions[i], center, axis1, axis2);
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}
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return positionResults;
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};
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};
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CoplanarPolygonGeometryLibrary.createProjectPointTo2DFunction = function(center, axis1, axis2) {
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return function(position, result) {
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return projectTo2D(position, center, axis1, axis2, result);
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};
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};
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exports.CoplanarPolygonGeometryLibrary = CoplanarPolygonGeometryLibrary;
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});
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