import Ellipsoid from "../Core/Ellipsoid.js";
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import HeightmapEncoding from "../Core/HeightmapEncoding.js";
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import HeightmapTessellator from "../Core/HeightmapTessellator.js";
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import Rectangle from "../Core/Rectangle.js";
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import RuntimeError from "../Core/RuntimeError.js";
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import Lerc from "../ThirdParty/lerc.js";
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import createTaskProcessorWorker from "./createTaskProcessorWorker.js";
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function createVerticesFromHeightmap(parameters, transferableObjects) {
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// LERC encoded buffers must be decoded, then we can process them like normal
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if (parameters.encoding === HeightmapEncoding.LERC) {
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var result;
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try {
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result = Lerc.decode(parameters.heightmap);
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} catch (error) {
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throw new RuntimeError(error);
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}
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var lercStatistics = result.statistics[0];
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if (lercStatistics.minValue === Number.MAX_VALUE) {
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throw new RuntimeError("Invalid tile data");
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}
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parameters.heightmap = result.pixels[0];
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parameters.width = result.width;
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parameters.height = result.height;
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}
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parameters.ellipsoid = Ellipsoid.clone(parameters.ellipsoid);
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parameters.rectangle = Rectangle.clone(parameters.rectangle);
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var statistics = HeightmapTessellator.computeVertices(parameters);
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var vertices = statistics.vertices;
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transferableObjects.push(vertices.buffer);
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return {
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vertices: vertices.buffer,
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numberOfAttributes: statistics.encoding.stride,
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minimumHeight: statistics.minimumHeight,
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maximumHeight: statistics.maximumHeight,
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gridWidth: parameters.width,
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gridHeight: parameters.height,
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boundingSphere3D: statistics.boundingSphere3D,
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orientedBoundingBox: statistics.orientedBoundingBox,
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occludeePointInScaledSpace: statistics.occludeePointInScaledSpace,
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encoding: statistics.encoding,
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westIndicesSouthToNorth: statistics.westIndicesSouthToNorth,
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southIndicesEastToWest: statistics.southIndicesEastToWest,
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eastIndicesNorthToSouth: statistics.eastIndicesNorthToSouth,
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northIndicesWestToEast: statistics.northIndicesWestToEast,
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};
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}
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export default createTaskProcessorWorker(createVerticesFromHeightmap);
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