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WebGPURenderer: Tight morph target packing #27984

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WebGPURenderer: Tight morph target packing #27984

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64861d5
tight pack
RenaudRohlinger Mar 24, 2024
7dffe60
remove all in tsl
RenaudRohlinger Mar 24, 2024
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62 changes: 39 additions & 23 deletions examples/jsm/nodes/accessors/MorphNode.js
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Original file line number Diff line number Diff line change
@@ -1,27 +1,44 @@
import Node, { addNodeClass } from '../core/Node.js';
import { NodeUpdateType } from '../core/constants.js';
import { float, nodeProxy, tslFn } from '../shadernode/ShaderNode.js';
import { If, float, nodeProxy, tslFn, vec4 } from '../shadernode/ShaderNode.js';
import { uniform } from '../core/UniformNode.js';
import { reference } from './ReferenceNode.js';
import { positionLocal } from './PositionNode.js';
import { normalLocal } from './NormalNode.js';
import { textureLoad } from './TextureNode.js';
import { instanceIndex, vertexIndex } from '../core/IndexNode.js';
import { ivec2, int } from '../shadernode/ShaderNode.js';
import { DataArrayTexture, Vector2, Vector4, FloatType } from 'three';
import { DataArrayTexture, Vector2, Vector4, FloatType, RedFormat } from 'three';
import { loop } from '../utils/LoopNode.js';
import { all } from '../Nodes.js';

Check notice

Code scanning / CodeQL

Unused variable, import, function or class Note

Unused import all.

const morphTextures = new WeakMap();
const morphVec4 = new Vector4();

const getMorph = tslFn( ( { bufferMap, influence, stride, width, depth, offset } ) => {

const texelIndex = int( vertexIndex ).mul( stride ).add( offset );
const texelIndex = int( vertexIndex ).mul( stride ).add( offset.mul( 3 ) );

const y = texelIndex.div( width );
const x = texelIndex.sub( y.mul( width ) );

const bufferAttrib = textureLoad( bufferMap, ivec2( x, y ) ).depth( depth );
const morphUV = ivec2( x, y );

// const bufferAttrib = textureLoad( bufferMap, ivec2( x, y ) ).depth( depth );

const bufferAttrib = vec4( 0. ).toVar();
bufferAttrib.x = textureLoad( bufferMap, morphUV ).depth( depth ).r;
morphUV.x.addAssign( 1 );
bufferAttrib.y = textureLoad( bufferMap, morphUV ).depth( depth ).r;
morphUV.x.addAssign( 1 );
bufferAttrib.z = textureLoad( bufferMap, morphUV ).depth( depth ).r;

If( stride.equal( 10 ), () => {

morphUV.x.addAssign( 1 );
bufferAttrib.a = offset.equal( 2 ).cond( textureLoad( bufferMap, morphUV ).depth( depth ).r, 0. );

} );

return bufferAttrib.mul( influence );

Expand Down Expand Up @@ -51,9 +68,9 @@

let vertexDataCount = 0;

if ( hasMorphPosition === true ) vertexDataCount = 1;
if ( hasMorphNormals === true ) vertexDataCount = 2;
if ( hasMorphColors === true ) vertexDataCount = 3;
if ( hasMorphPosition === true ) vertexDataCount = 3;
if ( hasMorphNormals === true ) vertexDataCount = 6;
if ( hasMorphColors === true ) vertexDataCount = 10;

let width = geometry.attributes.position.count * vertexDataCount;
let height = 1;
Expand All @@ -62,32 +79,33 @@

if ( width > maxTextureSize ) {

height = Math.ceil( width / maxTextureSize );
width = maxTextureSize;
// Align width on stride to simplify the texel fetching in the shader
const strideWidth = Math.floor( maxTextureSize / vertexDataCount ) * vertexDataCount;
height = Math.ceil( width / strideWidth );
width = strideWidth;

}

const buffer = new Float32Array( width * height * 4 * morphTargetsCount );
const buffer = new Float32Array( width * height * morphTargetsCount );

const bufferTexture = new DataArrayTexture( buffer, width, height, morphTargetsCount );
bufferTexture.type = FloatType;
bufferTexture.format = RedFormat;
bufferTexture.needsUpdate = true;

// fill buffer

const vertexDataStride = vertexDataCount * 4;

for ( let i = 0; i < morphTargetsCount; i ++ ) {

const morphTarget = morphTargets[ i ];
const morphNormal = morphNormals[ i ];
const morphColor = morphColors[ i ];

const offset = width * height * 4 * i;
const offset = width * height * i;

for ( let j = 0; j < morphTarget.count; j ++ ) {

const stride = j * vertexDataStride;
const stride = j * vertexDataCount;

if ( hasMorphPosition === true ) {

Expand All @@ -96,29 +114,27 @@
buffer[ offset + stride + 0 ] = morphVec4.x;
buffer[ offset + stride + 1 ] = morphVec4.y;
buffer[ offset + stride + 2 ] = morphVec4.z;
buffer[ offset + stride + 3 ] = 0;

}

if ( hasMorphNormals === true ) {

morphVec4.fromBufferAttribute( morphNormal, j );

buffer[ offset + stride + 4 ] = morphVec4.x;
buffer[ offset + stride + 5 ] = morphVec4.y;
buffer[ offset + stride + 6 ] = morphVec4.z;
buffer[ offset + stride + 7 ] = 0;
buffer[ offset + stride + 3 ] = morphVec4.x;
buffer[ offset + stride + 4 ] = morphVec4.y;
buffer[ offset + stride + 5 ] = morphVec4.z;

}

if ( hasMorphColors === true ) {

morphVec4.fromBufferAttribute( morphColor, j );

buffer[ offset + stride + 8 ] = morphVec4.x;
buffer[ offset + stride + 9 ] = morphVec4.y;
buffer[ offset + stride + 10 ] = morphVec4.z;
buffer[ offset + stride + 11 ] = ( morphColor.itemSize === 4 ) ? morphVec4.w : 1;
buffer[ offset + stride + 6 ] = morphVec4.x;
buffer[ offset + stride + 7 ] = morphVec4.y;
buffer[ offset + stride + 8 ] = morphVec4.z;
buffer[ offset + stride + 9 ] = ( morphColor.itemSize === 4 ) ? morphVec4.w : 1;

}

Expand Down
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