319 lines
18 KiB
JavaScript
319 lines
18 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', './Math-61ede240', './Cartographic-fe4be337', './BoundingSphere-775c5788', './Transforms-b2e71640', './PolylineVolumeGeometryLibrary-934b338a', './PolylinePipeline-a9f32196'], function (exports, when, _Math, Cartographic, BoundingSphere, Transforms, PolylineVolumeGeometryLibrary, PolylinePipeline) { 'use strict';
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/**
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* @private
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*/
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var CorridorGeometryLibrary = {};
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var scratch1 = new Cartographic.Cartesian3();
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var scratch2 = new Cartographic.Cartesian3();
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var scratch3 = new Cartographic.Cartesian3();
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var scratch4 = new Cartographic.Cartesian3();
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var scaleArray2 = [new Cartographic.Cartesian3(), new Cartographic.Cartesian3()];
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var cartesian1 = new Cartographic.Cartesian3();
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var cartesian2 = new Cartographic.Cartesian3();
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var cartesian3 = new Cartographic.Cartesian3();
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var cartesian4 = new Cartographic.Cartesian3();
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var cartesian5 = new Cartographic.Cartesian3();
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var cartesian6 = new Cartographic.Cartesian3();
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var cartesian7 = new Cartographic.Cartesian3();
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var cartesian8 = new Cartographic.Cartesian3();
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var cartesian9 = new Cartographic.Cartesian3();
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var cartesian10 = new Cartographic.Cartesian3();
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var quaterion = new Transforms.Quaternion();
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var rotMatrix = new BoundingSphere.Matrix3();
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function computeRoundCorner(cornerPoint, startPoint, endPoint, cornerType, leftIsOutside) {
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var angle = Cartographic.Cartesian3.angleBetween(Cartographic.Cartesian3.subtract(startPoint, cornerPoint, scratch1), Cartographic.Cartesian3.subtract(endPoint, cornerPoint, scratch2));
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var granularity = (cornerType === PolylineVolumeGeometryLibrary.CornerType.BEVELED) ? 1 : Math.ceil(angle / _Math.CesiumMath.toRadians(5)) + 1;
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var size = granularity * 3;
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var array = new Array(size);
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array[size - 3] = endPoint.x;
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array[size - 2] = endPoint.y;
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array[size - 1] = endPoint.z;
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var m;
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if (leftIsOutside) {
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m = BoundingSphere.Matrix3.fromQuaternion(Transforms.Quaternion.fromAxisAngle(Cartographic.Cartesian3.negate(cornerPoint, scratch1), angle / granularity, quaterion), rotMatrix);
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} else {
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m = BoundingSphere.Matrix3.fromQuaternion(Transforms.Quaternion.fromAxisAngle(cornerPoint, angle / granularity, quaterion), rotMatrix);
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}
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var index = 0;
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startPoint = Cartographic.Cartesian3.clone(startPoint, scratch1);
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for (var i = 0; i < granularity; i++) {
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startPoint = BoundingSphere.Matrix3.multiplyByVector(m, startPoint, startPoint);
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array[index++] = startPoint.x;
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array[index++] = startPoint.y;
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array[index++] = startPoint.z;
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}
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return array;
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}
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function addEndCaps(calculatedPositions) {
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var cornerPoint = cartesian1;
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var startPoint = cartesian2;
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var endPoint = cartesian3;
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var leftEdge = calculatedPositions[1];
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startPoint = Cartographic.Cartesian3.fromArray(calculatedPositions[1], leftEdge.length - 3, startPoint);
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endPoint = Cartographic.Cartesian3.fromArray(calculatedPositions[0], 0, endPoint);
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cornerPoint = Cartographic.Cartesian3.midpoint(startPoint, endPoint, cornerPoint);
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var firstEndCap = computeRoundCorner(cornerPoint, startPoint, endPoint, PolylineVolumeGeometryLibrary.CornerType.ROUNDED, false);
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var length = calculatedPositions.length - 1;
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var rightEdge = calculatedPositions[length - 1];
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leftEdge = calculatedPositions[length];
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startPoint = Cartographic.Cartesian3.fromArray(rightEdge, rightEdge.length - 3, startPoint);
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endPoint = Cartographic.Cartesian3.fromArray(leftEdge, 0, endPoint);
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cornerPoint = Cartographic.Cartesian3.midpoint(startPoint, endPoint, cornerPoint);
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var lastEndCap = computeRoundCorner(cornerPoint, startPoint, endPoint, PolylineVolumeGeometryLibrary.CornerType.ROUNDED, false);
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return [firstEndCap, lastEndCap];
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}
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function computeMiteredCorner(position, leftCornerDirection, lastPoint, leftIsOutside) {
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var cornerPoint = scratch1;
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if (leftIsOutside) {
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cornerPoint = Cartographic.Cartesian3.add(position, leftCornerDirection, cornerPoint);
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} else {
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leftCornerDirection = Cartographic.Cartesian3.negate(leftCornerDirection, leftCornerDirection);
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cornerPoint = Cartographic.Cartesian3.add(position, leftCornerDirection, cornerPoint);
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}
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return [cornerPoint.x, cornerPoint.y, cornerPoint.z, lastPoint.x, lastPoint.y, lastPoint.z];
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}
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function addShiftedPositions(positions, left, scalar, calculatedPositions) {
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var rightPositions = new Array(positions.length);
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var leftPositions = new Array(positions.length);
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var scaledLeft = Cartographic.Cartesian3.multiplyByScalar(left, scalar, scratch1);
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var scaledRight = Cartographic.Cartesian3.negate(scaledLeft, scratch2);
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var rightIndex = 0;
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var leftIndex = positions.length - 1;
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for (var i = 0; i < positions.length; i += 3) {
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var pos = Cartographic.Cartesian3.fromArray(positions, i, scratch3);
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var rightPos = Cartographic.Cartesian3.add(pos, scaledRight, scratch4);
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rightPositions[rightIndex++] = rightPos.x;
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rightPositions[rightIndex++] = rightPos.y;
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rightPositions[rightIndex++] = rightPos.z;
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var leftPos = Cartographic.Cartesian3.add(pos, scaledLeft, scratch4);
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leftPositions[leftIndex--] = leftPos.z;
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leftPositions[leftIndex--] = leftPos.y;
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leftPositions[leftIndex--] = leftPos.x;
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}
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calculatedPositions.push(rightPositions, leftPositions);
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return calculatedPositions;
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}
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/**
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* @private
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*/
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CorridorGeometryLibrary.addAttribute = function(attribute, value, front, back) {
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var x = value.x;
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var y = value.y;
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var z = value.z;
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if (when.defined(front)) {
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attribute[front] = x;
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attribute[front + 1] = y;
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attribute[front + 2] = z;
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}
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if (when.defined(back)) {
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attribute[back] = z;
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attribute[back - 1] = y;
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attribute[back - 2] = x;
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}
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};
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var scratchForwardProjection = new Cartographic.Cartesian3();
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var scratchBackwardProjection = new Cartographic.Cartesian3();
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/**
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* @private
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*/
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CorridorGeometryLibrary.computePositions = function(params) {
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var granularity = params.granularity;
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var positions = params.positions;
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var ellipsoid = params.ellipsoid;
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var width = params.width / 2;
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var cornerType = params.cornerType;
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var saveAttributes = params.saveAttributes;
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var normal = cartesian1;
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var forward = cartesian2;
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var backward = cartesian3;
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var left = cartesian4;
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var cornerDirection = cartesian5;
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var startPoint = cartesian6;
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var previousPos = cartesian7;
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var rightPos = cartesian8;
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var leftPos = cartesian9;
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var center = cartesian10;
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var calculatedPositions = [];
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var calculatedLefts = (saveAttributes) ? [] : undefined;
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var calculatedNormals = (saveAttributes) ? [] : undefined;
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var position = positions[0]; //add first point
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var nextPosition = positions[1];
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forward = Cartographic.Cartesian3.normalize(Cartographic.Cartesian3.subtract(nextPosition, position, forward), forward);
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normal = ellipsoid.geodeticSurfaceNormal(position, normal);
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left = Cartographic.Cartesian3.normalize(Cartographic.Cartesian3.cross(normal, forward, left), left);
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if (saveAttributes) {
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calculatedLefts.push(left.x, left.y, left.z);
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calculatedNormals.push(normal.x, normal.y, normal.z);
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}
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previousPos = Cartographic.Cartesian3.clone(position, previousPos);
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position = nextPosition;
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backward = Cartographic.Cartesian3.negate(forward, backward);
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var subdividedPositions;
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var corners = [];
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var i;
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var length = positions.length;
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for (i = 1; i < length - 1; i++) { // add middle points and corners
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normal = ellipsoid.geodeticSurfaceNormal(position, normal);
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nextPosition = positions[i + 1];
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forward = Cartographic.Cartesian3.normalize(Cartographic.Cartesian3.subtract(nextPosition, position, forward), forward);
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cornerDirection = Cartographic.Cartesian3.normalize(Cartographic.Cartesian3.add(forward, backward, cornerDirection), cornerDirection);
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var forwardProjection = Cartographic.Cartesian3.multiplyByScalar(normal, Cartographic.Cartesian3.dot(forward, normal), scratchForwardProjection);
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Cartographic.Cartesian3.subtract(forward, forwardProjection, forwardProjection);
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Cartographic.Cartesian3.normalize(forwardProjection, forwardProjection);
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var backwardProjection = Cartographic.Cartesian3.multiplyByScalar(normal, Cartographic.Cartesian3.dot(backward, normal), scratchBackwardProjection);
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Cartographic.Cartesian3.subtract(backward, backwardProjection, backwardProjection);
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Cartographic.Cartesian3.normalize(backwardProjection, backwardProjection);
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var doCorner = !_Math.CesiumMath.equalsEpsilon(Math.abs(Cartographic.Cartesian3.dot(forwardProjection, backwardProjection)), 1.0, _Math.CesiumMath.EPSILON7);
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if (doCorner) {
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cornerDirection = Cartographic.Cartesian3.cross(cornerDirection, normal, cornerDirection);
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cornerDirection = Cartographic.Cartesian3.cross(normal, cornerDirection, cornerDirection);
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cornerDirection = Cartographic.Cartesian3.normalize(cornerDirection, cornerDirection);
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var scalar = width / Math.max(0.25, Cartographic.Cartesian3.magnitude(Cartographic.Cartesian3.cross(cornerDirection, backward, scratch1)));
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var leftIsOutside = PolylineVolumeGeometryLibrary.PolylineVolumeGeometryLibrary.angleIsGreaterThanPi(forward, backward, position, ellipsoid);
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cornerDirection = Cartographic.Cartesian3.multiplyByScalar(cornerDirection, scalar, cornerDirection);
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if (leftIsOutside) {
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rightPos = Cartographic.Cartesian3.add(position, cornerDirection, rightPos);
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center = Cartographic.Cartesian3.add(rightPos, Cartographic.Cartesian3.multiplyByScalar(left, width, center), center);
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leftPos = Cartographic.Cartesian3.add(rightPos, Cartographic.Cartesian3.multiplyByScalar(left, width * 2, leftPos), leftPos);
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scaleArray2[0] = Cartographic.Cartesian3.clone(previousPos, scaleArray2[0]);
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scaleArray2[1] = Cartographic.Cartesian3.clone(center, scaleArray2[1]);
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subdividedPositions = PolylinePipeline.PolylinePipeline.generateArc({
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positions: scaleArray2,
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granularity: granularity,
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ellipsoid: ellipsoid
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});
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calculatedPositions = addShiftedPositions(subdividedPositions, left, width, calculatedPositions);
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if (saveAttributes) {
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calculatedLefts.push(left.x, left.y, left.z);
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calculatedNormals.push(normal.x, normal.y, normal.z);
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}
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startPoint = Cartographic.Cartesian3.clone(leftPos, startPoint);
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left = Cartographic.Cartesian3.normalize(Cartographic.Cartesian3.cross(normal, forward, left), left);
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leftPos = Cartographic.Cartesian3.add(rightPos, Cartographic.Cartesian3.multiplyByScalar(left, width * 2, leftPos), leftPos);
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previousPos = Cartographic.Cartesian3.add(rightPos, Cartographic.Cartesian3.multiplyByScalar(left, width, previousPos), previousPos);
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if (cornerType === PolylineVolumeGeometryLibrary.CornerType.ROUNDED || cornerType === PolylineVolumeGeometryLibrary.CornerType.BEVELED) {
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corners.push({
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leftPositions : computeRoundCorner(rightPos, startPoint, leftPos, cornerType, leftIsOutside)
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});
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} else {
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corners.push({
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leftPositions : computeMiteredCorner(position, Cartographic.Cartesian3.negate(cornerDirection, cornerDirection), leftPos, leftIsOutside)
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});
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}
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} else {
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leftPos = Cartographic.Cartesian3.add(position, cornerDirection, leftPos);
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center = Cartographic.Cartesian3.add(leftPos, Cartographic.Cartesian3.negate(Cartographic.Cartesian3.multiplyByScalar(left, width, center), center), center);
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rightPos = Cartographic.Cartesian3.add(leftPos, Cartographic.Cartesian3.negate(Cartographic.Cartesian3.multiplyByScalar(left, width * 2, rightPos), rightPos), rightPos);
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scaleArray2[0] = Cartographic.Cartesian3.clone(previousPos, scaleArray2[0]);
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scaleArray2[1] = Cartographic.Cartesian3.clone(center, scaleArray2[1]);
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subdividedPositions = PolylinePipeline.PolylinePipeline.generateArc({
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positions: scaleArray2,
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granularity: granularity,
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ellipsoid: ellipsoid
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});
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calculatedPositions = addShiftedPositions(subdividedPositions, left, width, calculatedPositions);
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if (saveAttributes) {
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calculatedLefts.push(left.x, left.y, left.z);
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calculatedNormals.push(normal.x, normal.y, normal.z);
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}
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startPoint = Cartographic.Cartesian3.clone(rightPos, startPoint);
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left = Cartographic.Cartesian3.normalize(Cartographic.Cartesian3.cross(normal, forward, left), left);
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rightPos = Cartographic.Cartesian3.add(leftPos, Cartographic.Cartesian3.negate(Cartographic.Cartesian3.multiplyByScalar(left, width * 2, rightPos), rightPos), rightPos);
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previousPos = Cartographic.Cartesian3.add(leftPos, Cartographic.Cartesian3.negate(Cartographic.Cartesian3.multiplyByScalar(left, width, previousPos), previousPos), previousPos);
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if (cornerType === PolylineVolumeGeometryLibrary.CornerType.ROUNDED || cornerType === PolylineVolumeGeometryLibrary.CornerType.BEVELED) {
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corners.push({
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rightPositions : computeRoundCorner(leftPos, startPoint, rightPos, cornerType, leftIsOutside)
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});
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} else {
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corners.push({
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rightPositions : computeMiteredCorner(position, cornerDirection, rightPos, leftIsOutside)
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});
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}
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}
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backward = Cartographic.Cartesian3.negate(forward, backward);
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}
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position = nextPosition;
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}
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normal = ellipsoid.geodeticSurfaceNormal(position, normal);
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scaleArray2[0] = Cartographic.Cartesian3.clone(previousPos, scaleArray2[0]);
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scaleArray2[1] = Cartographic.Cartesian3.clone(position, scaleArray2[1]);
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subdividedPositions = PolylinePipeline.PolylinePipeline.generateArc({
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positions: scaleArray2,
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granularity: granularity,
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ellipsoid: ellipsoid
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});
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calculatedPositions = addShiftedPositions(subdividedPositions, left, width, calculatedPositions);
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if (saveAttributes) {
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calculatedLefts.push(left.x, left.y, left.z);
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calculatedNormals.push(normal.x, normal.y, normal.z);
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}
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var endPositions;
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if (cornerType === PolylineVolumeGeometryLibrary.CornerType.ROUNDED) {
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endPositions = addEndCaps(calculatedPositions);
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}
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return {
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positions : calculatedPositions,
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corners : corners,
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lefts : calculatedLefts,
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normals : calculatedNormals,
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endPositions : endPositions
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};
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};
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exports.CorridorGeometryLibrary = CorridorGeometryLibrary;
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});
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