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* Copyright 2020 Cognite AS
*/
import { Sector, SectorQuads, TriangleMesh, InstancedMesh, InstancedMeshFile } from './types';
import { FetchCtmDelegate, ParseSectorDelegate } from './delegates';
import { createOffsetsArray } from '../../utils/arrayUtils';
import { ParseQuadsResult, ParseSectorResult } from '../../workers/types/parser.types';
import { ParserWorker } from '../../workers/parser.worker';
import * as Comlink from 'comlink';
import { createSimpleCache } from '../createCache';
type WorkDelegate<T> = (worker: ParserWorker) => Promise<T>;
// TODO 2019-11-01 larsmoa: Move PooledWorker.
interface PooledWorker {
// The worker returned by Comlink.wrap is not strictly speaking a ParserWorker,
// but it should expose the same functions
worker: ParserWorker;
activeJobCount: number;
messageIdCounter: number;
}
async function postWorkToAvailable<T>(workerList: PooledWorker[], work: WorkDelegate<T>): Promise<T> {
let targetWorker = workerList[0];
for (const worker of workerList) {
if (worker.activeJobCount < targetWorker.activeJobCount) {
targetWorker = worker;
}
}
targetWorker.activeJobCount += 1;
const result = await work(targetWorker.worker);
targetWorker.activeJobCount -= 1;
return result;
}
// TODO 20191030 larsmoa: Extract to separate file. Use Comlink (or other library
// for web workers) to prettify.
function createWorkers(): PooledWorker[] {
const workerList: PooledWorker[] = [];
for (let i = 0; i < window.navigator.hardwareConcurrency; i++) {
const newWorker = {
// NOTE: As of Comlink 4.2.0 we need to go through unknown before ParserWorker
// Please feel free to remove `as unknown` if possible.
worker: (Comlink.wrap(
new Worker('../../workers/parser.worker', { name: 'parser', type: 'module' })
) as unknown) as ParserWorker,
activeJobCount: 0,
messageIdCounter: 0
};
workerList.push(newWorker);
}
return workerList;
}
export function createParser(fetchCtmFile: FetchCtmDelegate): ParseSectorDelegate<Sector> {
const workerList = createWorkers();
// TODO define the cache outside of the createParser function to make it configurable
const loadCtmGeometryCache = createSimpleCache((fileId: number) => {
return loadCtmGeometry(fileId, fetchCtmFile, workerList);
});
async function parse(sectorId: number, sectorArrayBuffer: Uint8Array): Promise<Sector> {
try {
const sectorResult: ParseSectorResult = await postWorkToAvailable(workerList, async (worker: ParserWorker) =>
worker.parseSector(sectorArrayBuffer)
);
const {
boxes,
circles,
cones,
eccentricCones,
ellipsoidSegments,
generalCylinders,
generalRings,
instanceMeshes,
nuts,
quads,
sphericalSegments,
torusSegments,
trapeziums,
triangleMeshes
} = sectorResult;
const finalTriangleMeshes = await (async () => {
const { fileIds, colors, triangleCounts, treeIndices } = triangleMeshes;
const meshesGroupedByFile = groupMeshesByNumber(fileIds);
const finalMeshes = [];
// Merge meshes by file
// TODO do this in Rust instead
for (const [fileId, meshIndices] of meshesGroupedByFile.entries()) {
const fileTriangleCounts = meshIndices.map(i => triangleCounts[i]);
const offsets = createOffsetsArray(fileTriangleCounts);
// Load CTM (geometry)
const {
indices,
vertices,
normals,
colors: sharedColors,
treeIndices: sharedTreeIndices
} = await loadCtmGeometryCache.request(fileId);
for (let i = 0; i < meshIndices.length; i++) {
const meshIdx = meshIndices[i];
const treeIndex = treeIndices[meshIdx];
const triOffset = offsets[i];
const triCount = fileTriangleCounts[i];
const [r, g, b] = readColorToFloat32s(colors, meshIdx);
sharedTreeIndices.fill(treeIndex, triOffset, triOffset + triCount);
for (let triIdx = triOffset; triIdx < triOffset + triCount; triIdx++) {
for (let j = 0; j < 3; j++) {
const vIdx = indices[3 * triIdx + j];
sharedColors[3 * vIdx] = r;
sharedColors[3 * vIdx + 1] = g;
sharedColors[3 * vIdx + 2] = b;
}
}
}
const mesh: TriangleMesh = {
colors: sharedColors,
fileId,
treeIndices: sharedTreeIndices,
indices,
vertices,
normals
};
finalMeshes.push(mesh);
}
return finalMeshes;
})();
const finalInstanceMeshes = await (async () => {
const { fileIds, colors, treeIndices, triangleCounts, triangleOffsets, instanceMatrices } = instanceMeshes;
const meshesGroupedByFile = groupMeshesByNumber(fileIds);
const finalMeshes: InstancedMeshFile[] = [];
// Merge meshes by file
// TODO do this in Rust instead
// TODO de-duplicate this with the merged meshes above
for (const [fileId, meshIndices] of meshesGroupedByFile.entries()) {
const ctm = await loadCtmGeometryCache.request(fileId);
const indices = ctm.indices;
const vertices = ctm.vertices;
const normals = ctm.normals;
const instancedMeshes: InstancedMesh[] = [];
const fileTriangleOffsets = new Float64Array(meshIndices.map(i => triangleOffsets[i]));
const fileTriangleCounts = new Float64Array(meshIndices.map(i => triangleCounts[i]));
const fileMeshesGroupedByOffsets = groupMeshesByNumber(fileTriangleOffsets);
for (const [triangleOffset, fileMeshIndices] of fileMeshesGroupedByOffsets) {
// NOTE the triangle counts should be the same for all meshes with the same offset,
// hence we can look up only fileMeshIndices[0] instead of enumerating here
const triangleCount = fileTriangleCounts[fileMeshIndices[0]];
const instanceMatrixBuffer = new Float32Array(16 * fileMeshIndices.length);
const treeIndicesBuffer: number[] = new Array<number>(fileMeshIndices.length);
const colorBuffer = new Uint8Array(4 * fileMeshIndices.length);
for (let i = 0; i < fileMeshIndices.length; i++) {
const meshIdx = meshIndices[fileMeshIndices[i]];
const treeIndex = treeIndices[meshIdx];
const instanceMatrix = instanceMatrices.slice(meshIdx * 16, meshIdx * 16 + 16);
instanceMatrixBuffer.set(instanceMatrix, i * 16);
treeIndicesBuffer[i] = treeIndex;
const color = colors.slice(meshIdx * 4, meshIdx * 4 + 4);
colorBuffer.set(color, i * 4);
}
instancedMeshes.push({
triangleCount,
triangleOffset,
instanceMatrices: instanceMatrixBuffer,
colors: colorBuffer,
treeIndices: Float32Array.from(treeIndicesBuffer)
});
}
const mesh: InstancedMeshFile = {
fileId,
indices,
vertices,
normals,
instances: instancedMeshes
};
finalMeshes.push(mesh);
}
return finalMeshes;
})();
const sector: Sector = {
boxes,
circles,
cones,
eccentricCones,
ellipsoidSegments,
generalCylinders,
generalRings,
instanceMeshes: finalInstanceMeshes,
nuts,
quads,
sphericalSegments,
torusSegments,
trapeziums,
triangleMeshes: finalTriangleMeshes
};
return sector;
} catch (err) {
throw new Error(`Parsing sector ${sectorId} failed: ${err}`);
}
// TODO 20191023 larsmoa: Remember to free data from rust
}
return parse;
}
export async function createQuadsParser() {
// TODO consider sharing workers with i3df parser
const workerList = await createWorkers();
async function parse(sectorId: number, quadsArrayBuffer: Uint8Array): Promise<SectorQuads> {
try {
const sectorResult = await postWorkToAvailable<ParseQuadsResult>(workerList, async (worker: ParserWorker) =>
worker.parseQuads(quadsArrayBuffer)
);
return {
buffer: sectorResult.data
} as SectorQuads;
} catch (err) {
throw new Error(`Parsing quads sector ${sectorId} failed: ${err}`);
}
// TODO 20191023 larsmoa: Remember to free data from rust
}
return parse;
}
function groupMeshesByNumber(fileIds: Float64Array) {
const meshesGroupedByFile = new Map<number, number[]>();
for (let i = 0; i < fileIds.length; ++i) {
const fileId = fileIds[i];
const oldValue = meshesGroupedByFile.get(fileId);
if (oldValue) {
meshesGroupedByFile.set(fileId, [...oldValue, i]);
} else {
meshesGroupedByFile.set(fileId, [i]);
}
}
return meshesGroupedByFile;
}
function readColorToFloat32s(colors: Uint8Array, index: number): [number, number, number, number] {
const r = colors[4 * index] / 255;
const g = colors[4 * index + 1] / 255;
const b = colors[4 * index + 2] / 255;
const a = colors[4 * index + 3] / 255;
return [r, g, b, a];
}
async function loadCtmGeometry(
fileId: number,
fetchCtmFile: FetchCtmDelegate,
workerList: PooledWorker[]
): Promise<any> {
try {
const buffer = await fetchCtmFile(fileId);
const ctm = await postWorkToAvailable(workerList, async (worker: ParserWorker) => worker.parseCtm(buffer));
return ctm;
} catch (err) {
throw new Error(`Parsing CTM file ${fileId} failed: ${err}`);
}
}
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