306 lines
10 KiB
JavaScript
306 lines
10 KiB
JavaScript
/**
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* @license
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* Cesium - https://github.com/CesiumGS/cesium
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* Version 1.117
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*
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* Copyright 2011-2022 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/main/LICENSE.md for full licensing details.
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*/
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import {
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Quaternion_default
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} from "./chunk-I5TDPPC4.js";
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import {
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Cartesian3_default,
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Matrix3_default
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} from "./chunk-C5CE4OG6.js";
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import {
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Math_default
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} from "./chunk-4PHPQRSH.js";
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// packages/engine/Source/Core/EllipseGeometryLibrary.js
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var EllipseGeometryLibrary = {};
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var rotAxis = new Cartesian3_default();
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var tempVec = new Cartesian3_default();
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var unitQuat = new Quaternion_default();
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var rotMtx = new Matrix3_default();
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function pointOnEllipsoid(theta, rotation, northVec, eastVec, aSqr, ab, bSqr, mag, unitPos, result) {
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const azimuth = theta + rotation;
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Cartesian3_default.multiplyByScalar(eastVec, Math.cos(azimuth), rotAxis);
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Cartesian3_default.multiplyByScalar(northVec, Math.sin(azimuth), tempVec);
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Cartesian3_default.add(rotAxis, tempVec, rotAxis);
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let cosThetaSquared = Math.cos(theta);
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cosThetaSquared = cosThetaSquared * cosThetaSquared;
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let sinThetaSquared = Math.sin(theta);
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sinThetaSquared = sinThetaSquared * sinThetaSquared;
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const radius = ab / Math.sqrt(bSqr * cosThetaSquared + aSqr * sinThetaSquared);
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const angle = radius / mag;
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Quaternion_default.fromAxisAngle(rotAxis, angle, unitQuat);
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Matrix3_default.fromQuaternion(unitQuat, rotMtx);
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Matrix3_default.multiplyByVector(rotMtx, unitPos, result);
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Cartesian3_default.normalize(result, result);
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Cartesian3_default.multiplyByScalar(result, mag, result);
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return result;
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}
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var scratchCartesian1 = new Cartesian3_default();
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var scratchCartesian2 = new Cartesian3_default();
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var scratchCartesian3 = new Cartesian3_default();
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var scratchNormal = new Cartesian3_default();
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EllipseGeometryLibrary.raisePositionsToHeight = function(positions, options, extrude) {
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const ellipsoid = options.ellipsoid;
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const height = options.height;
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const extrudedHeight = options.extrudedHeight;
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const size = extrude ? positions.length / 3 * 2 : positions.length / 3;
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const finalPositions = new Float64Array(size * 3);
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const length = positions.length;
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const bottomOffset = extrude ? length : 0;
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for (let i = 0; i < length; i += 3) {
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const i1 = i + 1;
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const i2 = i + 2;
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const position = Cartesian3_default.fromArray(positions, i, scratchCartesian1);
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ellipsoid.scaleToGeodeticSurface(position, position);
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const extrudedPosition = Cartesian3_default.clone(position, scratchCartesian2);
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const normal = ellipsoid.geodeticSurfaceNormal(position, scratchNormal);
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const scaledNormal = Cartesian3_default.multiplyByScalar(
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normal,
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height,
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scratchCartesian3
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);
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Cartesian3_default.add(position, scaledNormal, position);
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if (extrude) {
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Cartesian3_default.multiplyByScalar(normal, extrudedHeight, scaledNormal);
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Cartesian3_default.add(extrudedPosition, scaledNormal, extrudedPosition);
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finalPositions[i + bottomOffset] = extrudedPosition.x;
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finalPositions[i1 + bottomOffset] = extrudedPosition.y;
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finalPositions[i2 + bottomOffset] = extrudedPosition.z;
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}
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finalPositions[i] = position.x;
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finalPositions[i1] = position.y;
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finalPositions[i2] = position.z;
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}
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return finalPositions;
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};
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var unitPosScratch = new Cartesian3_default();
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var eastVecScratch = new Cartesian3_default();
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var northVecScratch = new Cartesian3_default();
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EllipseGeometryLibrary.computeEllipsePositions = function(options, addFillPositions, addEdgePositions) {
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const semiMinorAxis = options.semiMinorAxis;
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const semiMajorAxis = options.semiMajorAxis;
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const rotation = options.rotation;
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const center = options.center;
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const granularity = options.granularity * 8;
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const aSqr = semiMinorAxis * semiMinorAxis;
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const bSqr = semiMajorAxis * semiMajorAxis;
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const ab = semiMajorAxis * semiMinorAxis;
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const mag = Cartesian3_default.magnitude(center);
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const unitPos = Cartesian3_default.normalize(center, unitPosScratch);
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let eastVec = Cartesian3_default.cross(Cartesian3_default.UNIT_Z, center, eastVecScratch);
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eastVec = Cartesian3_default.normalize(eastVec, eastVec);
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const northVec = Cartesian3_default.cross(unitPos, eastVec, northVecScratch);
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let numPts = 1 + Math.ceil(Math_default.PI_OVER_TWO / granularity);
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const deltaTheta = Math_default.PI_OVER_TWO / (numPts - 1);
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let theta = Math_default.PI_OVER_TWO - numPts * deltaTheta;
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if (theta < 0) {
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numPts -= Math.ceil(Math.abs(theta) / deltaTheta);
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}
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const size = 2 * (numPts * (numPts + 2));
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const positions = addFillPositions ? new Array(size * 3) : void 0;
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let positionIndex = 0;
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let position = scratchCartesian1;
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let reflectedPosition = scratchCartesian2;
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const outerPositionsLength = numPts * 4 * 3;
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let outerRightIndex = outerPositionsLength - 1;
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let outerLeftIndex = 0;
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const outerPositions = addEdgePositions ? new Array(outerPositionsLength) : void 0;
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let i;
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let j;
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let numInterior;
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let t;
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let interiorPosition;
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theta = Math_default.PI_OVER_TWO;
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position = pointOnEllipsoid(
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theta,
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rotation,
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northVec,
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eastVec,
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aSqr,
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ab,
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bSqr,
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mag,
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unitPos,
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position
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);
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if (addFillPositions) {
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positions[positionIndex++] = position.x;
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positions[positionIndex++] = position.y;
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positions[positionIndex++] = position.z;
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}
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if (addEdgePositions) {
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outerPositions[outerRightIndex--] = position.z;
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outerPositions[outerRightIndex--] = position.y;
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outerPositions[outerRightIndex--] = position.x;
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}
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theta = Math_default.PI_OVER_TWO - deltaTheta;
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for (i = 1; i < numPts + 1; ++i) {
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position = pointOnEllipsoid(
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theta,
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rotation,
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northVec,
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eastVec,
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aSqr,
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ab,
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bSqr,
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mag,
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unitPos,
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position
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);
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reflectedPosition = pointOnEllipsoid(
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Math.PI - theta,
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rotation,
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northVec,
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eastVec,
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aSqr,
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ab,
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bSqr,
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mag,
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unitPos,
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reflectedPosition
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);
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if (addFillPositions) {
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positions[positionIndex++] = position.x;
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positions[positionIndex++] = position.y;
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positions[positionIndex++] = position.z;
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numInterior = 2 * i + 2;
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for (j = 1; j < numInterior - 1; ++j) {
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t = j / (numInterior - 1);
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interiorPosition = Cartesian3_default.lerp(
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position,
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reflectedPosition,
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t,
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scratchCartesian3
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);
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positions[positionIndex++] = interiorPosition.x;
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positions[positionIndex++] = interiorPosition.y;
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positions[positionIndex++] = interiorPosition.z;
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}
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positions[positionIndex++] = reflectedPosition.x;
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positions[positionIndex++] = reflectedPosition.y;
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positions[positionIndex++] = reflectedPosition.z;
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}
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if (addEdgePositions) {
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outerPositions[outerRightIndex--] = position.z;
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outerPositions[outerRightIndex--] = position.y;
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outerPositions[outerRightIndex--] = position.x;
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outerPositions[outerLeftIndex++] = reflectedPosition.x;
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outerPositions[outerLeftIndex++] = reflectedPosition.y;
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outerPositions[outerLeftIndex++] = reflectedPosition.z;
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}
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theta = Math_default.PI_OVER_TWO - (i + 1) * deltaTheta;
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}
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for (i = numPts; i > 1; --i) {
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theta = Math_default.PI_OVER_TWO - (i - 1) * deltaTheta;
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position = pointOnEllipsoid(
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-theta,
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rotation,
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northVec,
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eastVec,
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aSqr,
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ab,
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bSqr,
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mag,
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unitPos,
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position
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);
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reflectedPosition = pointOnEllipsoid(
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theta + Math.PI,
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rotation,
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northVec,
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eastVec,
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aSqr,
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ab,
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bSqr,
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mag,
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unitPos,
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reflectedPosition
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);
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if (addFillPositions) {
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positions[positionIndex++] = position.x;
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positions[positionIndex++] = position.y;
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positions[positionIndex++] = position.z;
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numInterior = 2 * (i - 1) + 2;
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for (j = 1; j < numInterior - 1; ++j) {
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t = j / (numInterior - 1);
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interiorPosition = Cartesian3_default.lerp(
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position,
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reflectedPosition,
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t,
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scratchCartesian3
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);
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positions[positionIndex++] = interiorPosition.x;
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positions[positionIndex++] = interiorPosition.y;
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positions[positionIndex++] = interiorPosition.z;
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}
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positions[positionIndex++] = reflectedPosition.x;
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positions[positionIndex++] = reflectedPosition.y;
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positions[positionIndex++] = reflectedPosition.z;
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}
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if (addEdgePositions) {
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outerPositions[outerRightIndex--] = position.z;
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outerPositions[outerRightIndex--] = position.y;
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outerPositions[outerRightIndex--] = position.x;
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outerPositions[outerLeftIndex++] = reflectedPosition.x;
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outerPositions[outerLeftIndex++] = reflectedPosition.y;
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outerPositions[outerLeftIndex++] = reflectedPosition.z;
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}
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}
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theta = Math_default.PI_OVER_TWO;
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position = pointOnEllipsoid(
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-theta,
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rotation,
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northVec,
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eastVec,
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aSqr,
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ab,
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bSqr,
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mag,
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unitPos,
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position
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);
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const r = {};
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if (addFillPositions) {
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positions[positionIndex++] = position.x;
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positions[positionIndex++] = position.y;
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positions[positionIndex++] = position.z;
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r.positions = positions;
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r.numPts = numPts;
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}
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if (addEdgePositions) {
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outerPositions[outerRightIndex--] = position.z;
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outerPositions[outerRightIndex--] = position.y;
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outerPositions[outerRightIndex--] = position.x;
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r.outerPositions = outerPositions;
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}
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return r;
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};
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var EllipseGeometryLibrary_default = EllipseGeometryLibrary;
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export {
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EllipseGeometryLibrary_default
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};
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