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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 | 1x 1x 1x 1x 1x 1x 1x 1x | import macro from 'vtk.js/Sources/macros';
import Constants from 'vtk.js/Sources/Rendering/WebGPU/BufferManager/Constants';
import vtkProperty from 'vtk.js/Sources/Rendering/Core/Property';
import vtkWebGPUBuffer from 'vtk.js/Sources/Rendering/WebGPU/Buffer';
const { Representation } = vtkProperty;
const { PrimitiveTypes } = Constants;
// Simulate a small map of pointId to flatId for a cell. The original code
// used a map and was 2.6x slower (4.7 to 1.9 seconds). Using two fixed
// length arrays with a count is so much faster even with the required for
// loops and if statements. This only works as we know the usage is
// restricted to clear(), set() get() and has() so the count is always
// incrmenting except for clear where it goes back to 0. Performance
// improvement is probably due to this appoach not hitting the heap but wow
// it is so much faster. Code that adds to these vectors checks against 9 to
// make sure there is room. Switching to test against vec.length -1 results
// in a small performance hit, so if you change 10, search for 9 in this
// small class and change those as well.
class _LimitedMap {
constructor() {
this.keys = new Uint32Array(10);
this.values = new Uint32Array(10);
this.count = 0;
}
clear() {
this.count = 0;
}
has(key) {
for (let i = 0; i < this.count; i++) {
if (this.keys[i] === key) {
return true;
}
}
return undefined;
}
get(key) {
for (let i = 0; i < this.count; i++) {
if (this.keys[i] === key) {
return this.values[i];
}
}
return undefined;
}
set(key, value) {
if (this.count < 9) {
this.keys[this.count] = key;
this.values[this.count++] = value;
}
}
}
function getPrimitiveName(primType) {
switch (primType) {
case PrimitiveTypes.Points:
return 'points';
case PrimitiveTypes.Lines:
return 'lines';
case PrimitiveTypes.Triangles:
case PrimitiveTypes.TriangleEdges:
return 'polys';
case PrimitiveTypes.TriangleStripEdges:
case PrimitiveTypes.TriangleStrips:
return 'strips';
default:
return '';
}
}
function _getOrAddFlatId(state, ptId, cellId) {
let flatId = state.pointIdToFlatId[ptId];
if (flatId < 0) {
flatId = state.flatId;
state.pointIdToFlatId[ptId] = flatId;
state.flatIdToPointId[state.flatId] = ptId;
state.flatIdToCellId[state.flatId] = cellId;
state.flatId++;
}
return flatId;
}
function fillCell(ptIds, cellId, state) {
const numPtIds = ptIds.length;
// are any points already marked for this cell? If so use that as the provoking point
for (let ptIdx = 0; ptIdx < numPtIds; ptIdx++) {
let ptId = ptIds[ptIdx];
if (state.cellProvokedMap.has(ptId)) {
state.ibo[state.iboId++] = state.cellProvokedMap.get(ptId);
// insert remaining ptIds (they do not need to provoke)
for (let ptIdx2 = ptIdx + 1; ptIdx2 < ptIdx + numPtIds; ptIdx2++) {
ptId = ptIds[ptIdx2 % numPtIds];
const flatId = _getOrAddFlatId(state, ptId, cellId);
// add to ibo
state.ibo[state.iboId++] = flatId;
}
// all done now
return;
}
}
// else have any of the points not been used yet? (not in provokedPointIds)
for (let ptIdx = 0; ptIdx < numPtIds; ptIdx++) {
let ptId = ptIds[ptIdx];
if (!state.provokedPointIds[ptId]) {
let flatId = _getOrAddFlatId(state, ptId, cellId);
// mark provoking and add to ibo
state.provokedPointIds[ptId] = 1;
state.cellProvokedMap.set(ptId, flatId);
// when provoking always set the cellId as an original non-provoking value
// will have been stored and we need to overwrite that
state.flatIdToCellId[flatId] = cellId;
state.ibo[state.iboId++] = flatId;
// insert remaining ptIds (they do not need to provoke)
for (let ptIdx2 = ptIdx + 1; ptIdx2 < ptIdx + numPtIds; ptIdx2++) {
ptId = ptIds[ptIdx2 % numPtIds];
flatId = _getOrAddFlatId(state, ptId, cellId);
// add to ibo
state.ibo[state.iboId++] = flatId;
}
// all done now
return;
}
}
// if we got here then none of the ptIds could be used to provoke
// so just duplicate the first one
let ptId = ptIds[0];
let flatId = state.flatId;
state.cellProvokedMap.set(ptId, flatId);
state.flatIdToPointId[state.flatId] = ptId;
state.flatIdToCellId[state.flatId] = cellId;
state.flatId++;
// add to ibo
state.ibo[state.iboId++] = flatId;
// insert remaining ptIds (they do not need to provoke)
for (let ptIdx2 = 1; ptIdx2 < numPtIds; ptIdx2++) {
ptId = ptIds[ptIdx2];
flatId = _getOrAddFlatId(state, ptId, cellId);
// add to ibo
state.ibo[state.iboId++] = flatId;
}
}
function countCell(ptIds, cellId, state) {
const numPtIds = ptIds.length;
state.iboSize += numPtIds;
// are any points already marked for this cell? If so use that as the provoking point
for (let ptIdx = 0; ptIdx < numPtIds; ptIdx++) {
const ptId = ptIds[ptIdx];
if (state.cellProvokedMap.has(ptId)) {
return;
}
}
// else have any of the points not been used yet? (not in provokedPointIds)
for (let ptIdx = 0; ptIdx < numPtIds; ptIdx++) {
const ptId = ptIds[ptIdx];
if (!state.provokedPointIds[ptId]) {
state.provokedPointIds[ptId] = 1;
state.cellProvokedMap.set(ptId, 1);
return;
}
}
// if we got here then none of the ptIds could be used to provoke
state.cellProvokedMap.set(ptIds[0], 1);
state.extraPoints++;
}
let processCell;
const _single = new Uint32Array(1);
const _double = new Uint32Array(2);
const _triple = new Uint32Array(3);
const _indexCellBuilders = {
// easy, every input point becomes an output point
anythingToPoints(numPoints, cellPts, offset, cellId, state) {
for (let i = 0; i < numPoints; ++i) {
_single[0] = cellPts[offset + i];
processCell(_single, cellId, state);
}
},
linesToWireframe(numPoints, cellPts, offset, cellId, state) {
// for lines we add a bunch of segments
for (let i = 0; i < numPoints - 1; ++i) {
_double[0] = cellPts[offset + i];
_double[1] = cellPts[offset + i + 1];
processCell(_double, cellId, state);
}
},
polysToWireframe(numPoints, cellPts, offset, cellId, state) {
// for polys we add a bunch of segments and close it
if (numPoints > 2) {
for (let i = 0; i < numPoints; ++i) {
_double[0] = cellPts[offset + i];
_double[1] = cellPts[offset + ((i + 1) % numPoints)];
processCell(_double, cellId, state);
}
}
},
stripsToWireframe(numPoints, cellPts, offset, cellId, state) {
if (numPoints > 2) {
// for strips we add a bunch of segments and close it
for (let i = 0; i < numPoints - 1; ++i) {
_double[0] = cellPts[offset + i];
_double[1] = cellPts[offset + i + 1];
processCell(_double, cellId, state);
}
for (let i = 0; i < numPoints - 2; i++) {
_double[0] = cellPts[offset + i];
_double[1] = cellPts[offset + i + 2];
processCell(_double, cellId, state);
}
}
},
polysToSurface(npts, cellPts, offset, cellId, state) {
for (let i = 0; i < npts - 2; i++) {
_triple[0] = cellPts[offset];
_triple[1] = cellPts[offset + i + 1];
_triple[2] = cellPts[offset + i + 2];
processCell(_triple, cellId, state);
}
},
stripsToSurface(npts, cellPts, offset, cellId, state) {
for (let i = 0; i < npts - 2; i++) {
_triple[0] = cellPts[offset + i];
_triple[1] = cellPts[offset + i + 1 + (i % 2)];
_triple[2] = cellPts[offset + i + 1 + ((i + 1) % 2)];
processCell(_triple, cellId, state);
}
},
};
// ----------------------------------------------------------------------------
// vtkWebGPUIndexBufferManager methods
// ----------------------------------------------------------------------------
function vtkWebGPUIndexBuffer(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkWebGPUIndexBuffer');
publicAPI.buildIndexBuffer = (req) => {
const cellArray = req.cells;
const primitiveType = req.primitiveType;
const representation = req.representation;
const cellOffset = req.cellOffset;
const array = cellArray.getData();
const cellArraySize = array.length;
const inRepName = getPrimitiveName(primitiveType);
const numPts = req.numberOfPoints;
const state = {
provokedPointIds: new Uint8Array(numPts), // size is good
extraPoints: 0,
iboSize: 0,
flatId: 0,
iboId: 0,
cellProvokedMap: new _LimitedMap(),
};
let func = null;
if (
representation === Representation.POINTS ||
primitiveType === PrimitiveTypes.Points
) {
func = _indexCellBuilders.anythingToPoints;
} else if (
representation === Representation.WIREFRAME ||
primitiveType === PrimitiveTypes.Lines
) {
func = _indexCellBuilders[`${inRepName}ToWireframe`];
} else {
func = _indexCellBuilders[`${inRepName}ToSurface`];
}
// first we count how many extra provoking points we need
processCell = countCell;
let cellId = cellOffset || 0;
for (let cellArrayIndex = 0; cellArrayIndex < cellArraySize; ) {
state.cellProvokedMap.clear();
func(array[cellArrayIndex], array, cellArrayIndex + 1, cellId, state);
cellArrayIndex += array[cellArrayIndex] + 1;
cellId++;
}
// then we allocate the remaining structures
// (we pick the best size to save space and transfer costs)
if (numPts <= 0xffff) {
state.flatIdToPointId = new Uint16Array(numPts + state.extraPoints);
} else {
state.flatIdToPointId = new Uint32Array(numPts + state.extraPoints);
}
if (numPts + state.extraPoints < 0x8fff) {
state.pointIdToFlatId = new Int16Array(numPts);
} else {
state.pointIdToFlatId = new Int32Array(numPts);
}
if (numPts + state.extraPoints <= 0xffff) {
state.ibo = new Uint16Array(state.iboSize);
req.format = 'uint16';
} else {
state.ibo = new Uint32Array(state.iboSize);
req.format = 'uint32';
}
if (cellId <= 0xffff) {
state.flatIdToCellId = new Uint16Array(numPts + state.extraPoints);
} else {
state.flatIdToCellId = new Uint32Array(numPts + state.extraPoints);
}
state.pointIdToFlatId.fill(-1);
state.provokedPointIds.fill(0);
// and fill them in
processCell = fillCell;
cellId = cellOffset || 0;
for (let cellArrayIndex = 0; cellArrayIndex < cellArraySize; ) {
state.cellProvokedMap.clear();
func(array[cellArrayIndex], array, cellArrayIndex + 1, cellId, state);
cellArrayIndex += array[cellArrayIndex] + 1;
cellId++;
}
delete state.provokedPointIds;
delete state.pointIdToFlatId;
// store the results we need
req.nativeArray = state.ibo;
model.flatIdToPointId = state.flatIdToPointId;
model.flatIdToCellId = state.flatIdToCellId;
model.flatSize = state.flatId;
model.indexCount = state.iboId;
};
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
flatIdToPointId: null,
flatIdToCellId: null,
flatSize: 0,
indexCount: 0,
};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Inheritance
vtkWebGPUBuffer.extend(publicAPI, model, initialValues);
macro.setGet(publicAPI, model, [
'flatIdToPointId',
'flatIdToCellId',
'flatSize',
'indexCount',
]);
vtkWebGPUIndexBuffer(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(extend);
// ----------------------------------------------------------------------------
export default { newInstance, extend, ...Constants };
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