87 lines
2.5 KiB
JavaScript
87 lines
2.5 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/main/LICENSE.md for full licensing details.
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*/
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define(['exports', './ComponentDatatype-aad54330'], (function (exports, ComponentDatatype) { 'use strict';
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/**
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* @private
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*/
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const CylinderGeometryLibrary = {};
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/**
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* @private
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*/
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CylinderGeometryLibrary.computePositions = function (
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length,
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topRadius,
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bottomRadius,
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slices,
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fill
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) {
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const topZ = length * 0.5;
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const bottomZ = -topZ;
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const twoSlice = slices + slices;
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const size = fill ? 2 * twoSlice : twoSlice;
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const positions = new Float64Array(size * 3);
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let i;
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let index = 0;
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let tbIndex = 0;
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const bottomOffset = fill ? twoSlice * 3 : 0;
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const topOffset = fill ? (twoSlice + slices) * 3 : slices * 3;
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for (i = 0; i < slices; i++) {
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const angle = (i / slices) * ComponentDatatype.CesiumMath.TWO_PI;
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const x = Math.cos(angle);
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const y = Math.sin(angle);
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const bottomX = x * bottomRadius;
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const bottomY = y * bottomRadius;
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const topX = x * topRadius;
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const topY = y * topRadius;
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positions[tbIndex + bottomOffset] = bottomX;
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positions[tbIndex + bottomOffset + 1] = bottomY;
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positions[tbIndex + bottomOffset + 2] = bottomZ;
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positions[tbIndex + topOffset] = topX;
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positions[tbIndex + topOffset + 1] = topY;
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positions[tbIndex + topOffset + 2] = topZ;
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tbIndex += 3;
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if (fill) {
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positions[index++] = bottomX;
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positions[index++] = bottomY;
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positions[index++] = bottomZ;
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positions[index++] = topX;
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positions[index++] = topY;
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positions[index++] = topZ;
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}
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}
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return positions;
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};
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exports.CylinderGeometryLibrary = CylinderGeometryLibrary;
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}));
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//# sourceMappingURL=CylinderGeometryLibrary-bedde1c3.js.map
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