241 lines
10 KiB
JavaScript
241 lines
10 KiB
JavaScript
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/**
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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', './when-8d13db60', './Check-70bec281', './Math-61ede240', './Cartographic-fe4be337', './Cartesian2-85064f09', './BoundingSphere-775c5788', './GeometryAttribute-ed9d707f'], function (exports, when, Check, _Math, Cartographic, Cartesian2, BoundingSphere, GeometryAttribute) { 'use strict';
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var cos = Math.cos;
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var sin = Math.sin;
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var sqrt = Math.sqrt;
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/**
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* @private
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*/
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var RectangleGeometryLibrary = {};
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/**
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* @private
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*/
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RectangleGeometryLibrary.computePosition = function(computedOptions, ellipsoid, computeST, row, col, position, st) {
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var radiiSquared = ellipsoid.radiiSquared;
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var nwCorner = computedOptions.nwCorner;
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var rectangle = computedOptions.boundingRectangle;
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var stLatitude = nwCorner.latitude - computedOptions.granYCos * row + col * computedOptions.granXSin;
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var cosLatitude = cos(stLatitude);
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var nZ = sin(stLatitude);
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var kZ = radiiSquared.z * nZ;
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var stLongitude = nwCorner.longitude + row * computedOptions.granYSin + col * computedOptions.granXCos;
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var nX = cosLatitude * cos(stLongitude);
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var nY = cosLatitude * sin(stLongitude);
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var kX = radiiSquared.x * nX;
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var kY = radiiSquared.y * nY;
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var gamma = sqrt((kX * nX) + (kY * nY) + (kZ * nZ));
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position.x = kX / gamma;
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position.y = kY / gamma;
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position.z = kZ / gamma;
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if (computeST) {
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var stNwCorner = computedOptions.stNwCorner;
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if (when.defined(stNwCorner)) {
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stLatitude = stNwCorner.latitude - computedOptions.stGranYCos * row + col * computedOptions.stGranXSin;
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stLongitude = stNwCorner.longitude + row * computedOptions.stGranYSin + col * computedOptions.stGranXCos;
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st.x = (stLongitude - computedOptions.stWest) * computedOptions.lonScalar;
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st.y = (stLatitude - computedOptions.stSouth) * computedOptions.latScalar;
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} else {
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st.x = (stLongitude - rectangle.west) * computedOptions.lonScalar;
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st.y = (stLatitude - rectangle.south) * computedOptions.latScalar;
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}
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}
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};
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var rotationMatrixScratch = new GeometryAttribute.Matrix2();
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var nwCartesian = new Cartographic.Cartesian3();
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var centerScratch = new Cartographic.Cartographic();
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var centerCartesian = new Cartographic.Cartesian3();
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var proj = new BoundingSphere.GeographicProjection();
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function getRotationOptions(nwCorner, rotation, granularityX, granularityY, center, width, height) {
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var cosRotation = Math.cos(rotation);
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var granYCos = granularityY * cosRotation;
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var granXCos = granularityX * cosRotation;
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var sinRotation = Math.sin(rotation);
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var granYSin = granularityY * sinRotation;
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var granXSin = granularityX * sinRotation;
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nwCartesian = proj.project(nwCorner, nwCartesian);
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nwCartesian = Cartographic.Cartesian3.subtract(nwCartesian, centerCartesian, nwCartesian);
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var rotationMatrix = GeometryAttribute.Matrix2.fromRotation(rotation, rotationMatrixScratch);
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nwCartesian = GeometryAttribute.Matrix2.multiplyByVector(rotationMatrix, nwCartesian, nwCartesian);
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nwCartesian = Cartographic.Cartesian3.add(nwCartesian, centerCartesian, nwCartesian);
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nwCorner = proj.unproject(nwCartesian, nwCorner);
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width -= 1;
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height -= 1;
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var latitude = nwCorner.latitude;
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var latitude0 = latitude + width * granXSin;
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var latitude1 = latitude - granYCos * height;
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var latitude2 = latitude - granYCos * height + width * granXSin;
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var north = Math.max(latitude, latitude0, latitude1, latitude2);
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var south = Math.min(latitude, latitude0, latitude1, latitude2);
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var longitude = nwCorner.longitude;
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var longitude0 = longitude + width * granXCos;
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var longitude1 = longitude + height * granYSin;
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var longitude2 = longitude + height * granYSin + width * granXCos;
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var east = Math.max(longitude, longitude0, longitude1, longitude2);
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var west = Math.min(longitude, longitude0, longitude1, longitude2);
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return {
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north: north,
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south: south,
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east: east,
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west: west,
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granYCos : granYCos,
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granYSin : granYSin,
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granXCos : granXCos,
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granXSin : granXSin,
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nwCorner : nwCorner
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};
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}
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/**
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* @private
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*/
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RectangleGeometryLibrary.computeOptions = function(rectangle, granularity, rotation, stRotation, boundingRectangleScratch, nwCornerResult, stNwCornerResult) {
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var east = rectangle.east;
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var west = rectangle.west;
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var north = rectangle.north;
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var south = rectangle.south;
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var northCap = false;
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var southCap = false;
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if (north === _Math.CesiumMath.PI_OVER_TWO) {
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northCap = true;
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}
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if (south === -_Math.CesiumMath.PI_OVER_TWO) {
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southCap = true;
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}
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var width;
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var height;
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var granularityX;
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var granularityY;
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var dx;
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var dy = north - south;
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if (west > east) {
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dx = (_Math.CesiumMath.TWO_PI - west + east);
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} else {
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dx = east - west;
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}
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width = Math.ceil(dx / granularity) + 1;
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height = Math.ceil(dy / granularity) + 1;
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granularityX = dx / (width - 1);
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granularityY = dy / (height - 1);
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var nwCorner = Cartesian2.Rectangle.northwest(rectangle, nwCornerResult);
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var center = Cartesian2.Rectangle.center(rectangle, centerScratch);
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if (rotation !== 0 || stRotation !== 0) {
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if (center.longitude < nwCorner.longitude) {
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center.longitude += _Math.CesiumMath.TWO_PI;
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}
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centerCartesian = proj.project(center, centerCartesian);
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}
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var granYCos = granularityY;
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var granXCos = granularityX;
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var granYSin = 0.0;
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var granXSin = 0.0;
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var boundingRectangle = Cartesian2.Rectangle.clone(rectangle, boundingRectangleScratch);
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var computedOptions = {
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granYCos : granYCos,
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granYSin : granYSin,
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granXCos : granXCos,
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granXSin : granXSin,
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nwCorner : nwCorner,
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boundingRectangle : boundingRectangle,
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width: width,
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height: height,
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northCap: northCap,
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southCap: southCap
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};
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if (rotation !== 0) {
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var rotationOptions = getRotationOptions(nwCorner, rotation, granularityX, granularityY, center, width, height);
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north = rotationOptions.north;
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south = rotationOptions.south;
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east = rotationOptions.east;
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west = rotationOptions.west;
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//>>includeStart('debug', pragmas.debug);
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if (north < -_Math.CesiumMath.PI_OVER_TWO || north > _Math.CesiumMath.PI_OVER_TWO ||
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south < -_Math.CesiumMath.PI_OVER_TWO || south > _Math.CesiumMath.PI_OVER_TWO) {
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throw new Check.DeveloperError('Rotated rectangle is invalid. It crosses over either the north or south pole.');
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}
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//>>includeEnd('debug')
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computedOptions.granYCos = rotationOptions.granYCos;
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computedOptions.granYSin = rotationOptions.granYSin;
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computedOptions.granXCos = rotationOptions.granXCos;
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computedOptions.granXSin = rotationOptions.granXSin;
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boundingRectangle.north = north;
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boundingRectangle.south = south;
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boundingRectangle.east = east;
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boundingRectangle.west = west;
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}
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if (stRotation !== 0) {
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rotation = rotation - stRotation;
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var stNwCorner = Cartesian2.Rectangle.northwest(boundingRectangle, stNwCornerResult);
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var stRotationOptions = getRotationOptions(stNwCorner, rotation, granularityX, granularityY, center, width, height);
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computedOptions.stGranYCos = stRotationOptions.granYCos;
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computedOptions.stGranXCos = stRotationOptions.granXCos;
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computedOptions.stGranYSin = stRotationOptions.granYSin;
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computedOptions.stGranXSin = stRotationOptions.granXSin;
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computedOptions.stNwCorner = stNwCorner;
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computedOptions.stWest = stRotationOptions.west;
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computedOptions.stSouth = stRotationOptions.south;
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}
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return computedOptions;
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};
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exports.RectangleGeometryLibrary = RectangleGeometryLibrary;
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});
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