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WebGPURenderer: Add PCFShadowMap support. #28926

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merged 10 commits into from
Jul 23, 2024
Merged

WebGPURenderer: Add PCFShadowMap support. #28926

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37edb51
WebGPURenderer: Add `PCFShadowMap` support.
Mugen87 Jul 20, 2024
bc032e2
E2E: Update screenshots.
Mugen87 Jul 20, 2024
6899412
AnalyticLightNode: Revert cache key change.
Mugen87 Jul 21, 2024
be1bd9f
AnalyticLightNode: Fix `object.receiveShadow` toggle.
Mugen87 Jul 21, 2024
bb37e51
Revert "AnalyticLightNode: Fix `object.receiveShadow` toggle."
Mugen87 Jul 21, 2024
7964704
toggle dynamic object.receiveShadow
sunag Jul 23, 2024
2be975c
RenderObject: Rename getNodesCacheKey -> getDynamicCacheKey()
sunag Jul 23, 2024
e79fe5a
revision
sunag Jul 23, 2024
d35d4a4
added support to filter node
sunag Jul 23, 2024
06e247f
Update AnalyticLightNode.js
Mugen87 Jul 23, 2024
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Binary file modified examples/screenshots/webgpu_clipping.jpg
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Binary file modified examples/screenshots/webgpu_postprocessing_pixel.jpg
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10 changes: 6 additions & 4 deletions examples/webgpu_postprocessing_pixel.html
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Original file line number Diff line number Diff line change
Expand Up @@ -69,7 +69,7 @@

const mesh = new THREE.Mesh( new THREE.BoxGeometry( boxSideLength, boxSideLength, boxSideLength ), boxMaterial );
mesh.castShadow = true;
//mesh.receiveShadow = true;
mesh.receiveShadow = true;
mesh.rotation.y = rotation;
mesh.position.y = boxSideLength / 2;
mesh.position.set( x, boxSideLength / 2 + .0001, z );
Expand Down Expand Up @@ -101,7 +101,7 @@
specular: 0xffffff
} )
);
//crystalMesh.receiveShadow = true;
crystalMesh.receiveShadow = true;
crystalMesh.castShadow = true;
scene.add( crystalMesh );

Expand All @@ -113,6 +113,7 @@
directionalLight.position.set( 100, 100, 100 );
directionalLight.castShadow = true;
directionalLight.shadow.mapSize.set( 2048, 2048 );
directionalLight.shadow.bias = - 0.0001;
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@Mugen87 Mugen87 Jul 20, 2024 •
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I'm not sure about the root cause yet but lights with WebGPURenderer seems to need a shadow bias more often. I suspect this is related to the shadow compare operation which is different compared to WebGLRenderer. The previous approach used MeshDepthMaterial with RGBA packing, the new approach uses a depth texture attachment.

Changing the depth texture type to THREE.FloatType did not help.

scene.add( directionalLight );

const spotLight = new THREE.SpotLight( 0xffc100, 10, 10, Math.PI / 16, .02, 2 );
Expand All @@ -121,11 +122,12 @@
scene.add( target );
target.position.set( 0, 0, 0 );
spotLight.castShadow = true;
spotLight.shadow.bias = - 0.001;
scene.add( spotLight );

renderer = new THREE.WebGPURenderer( { antialias: false } );
renderer = new THREE.WebGPURenderer();
renderer.shadowMap.enabled = true;
//renderer.setPixelRatio( window.devicePixelRatio );
renderer.shadowMap.type = THREE.BasicShadowMap;
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.setAnimationLoop( animate );
document.body.appendChild( renderer.domElement );
Expand Down
216 changes: 112 additions & 104 deletions src/nodes/lighting/AnalyticLightNode.js
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Expand Up @@ -2,16 +2,66 @@ import LightingNode from './LightingNode.js';
import { NodeUpdateType } from '../core/constants.js';
import { uniform } from '../core/UniformNode.js';
import { addNodeClass } from '../core/Node.js';
import { vec3, vec4 } from '../shadernode/ShaderNode.js';
import { float, vec2, vec3, vec4 } from '../shadernode/ShaderNode.js';
import { reference } from '../accessors/ReferenceNode.js';
import { texture } from '../accessors/TextureNode.js';
import { positionWorld } from '../accessors/PositionNode.js';
import { normalWorld } from '../accessors/NormalNode.js';
import { mix } from '../math/MathNode.js';
//import { add } from '../math/OperatorNode.js';
import { add } from '../math/OperatorNode.js';
import { Color } from '../../math/Color.js';
import { DepthTexture } from '../../textures/DepthTexture.js';
import { NearestFilter, LessCompare, NoToneMapping, WebGPUCoordinateSystem } from '../../constants.js';
import { tslFn } from '../shadernode/ShaderNode.js';
import { LessCompare, WebGPUCoordinateSystem } from '../../constants.js';

const BasicShadowMap = tslFn( ( { depthTexture, shadowCoord } ) => {

return texture( depthTexture, shadowCoord.xy ).compare( shadowCoord.z );

} );

const PCFShadowMap = tslFn( ( { depthTexture, shadowCoord, shadow } ) => {

const depthCompare = ( uv, compare ) => texture( depthTexture, uv ).compare( compare );

const mapSize = reference( 'mapSize', 'vec2', shadow );
const radius = reference( 'radius', 'float', shadow );

const texelSize = vec2( 1 ).div( mapSize );
const dx0 = texelSize.x.negate().mul( radius );
const dy0 = texelSize.y.negate().mul( radius );
const dx1 = texelSize.x.mul( radius );
const dy1 = texelSize.y.mul( radius );
const dx2 = dx0.div( 2 );
const dy2 = dy0.div( 2 );
const dx3 = dx1.div( 2 );
const dy3 = dy1.div( 2 );

return add(
depthCompare( shadowCoord.xy.add( vec2( dx0, dy0 ) ), shadowCoord.z ),
depthCompare( shadowCoord.xy.add( vec2( 0, dy0 ) ), shadowCoord.z ),
depthCompare( shadowCoord.xy.add( vec2( dx1, dy0 ) ), shadowCoord.z ),
depthCompare( shadowCoord.xy.add( vec2( dx2, dy2 ) ), shadowCoord.z ),
depthCompare( shadowCoord.xy.add( vec2( 0, dy2 ) ), shadowCoord.z ),
depthCompare( shadowCoord.xy.add( vec2( dx3, dy2 ) ), shadowCoord.z ),
depthCompare( shadowCoord.xy.add( vec2( dx0, 0 ) ), shadowCoord.z ),
depthCompare( shadowCoord.xy.add( vec2( dx2, 0 ) ), shadowCoord.z ),
depthCompare( shadowCoord.xy, shadowCoord.z ),
depthCompare( shadowCoord.xy.add( vec2( dx3, 0 ) ), shadowCoord.z ),
depthCompare( shadowCoord.xy.add( vec2( dx1, 0 ) ), shadowCoord.z ),
depthCompare( shadowCoord.xy.add( vec2( dx2, dy3 ) ), shadowCoord.z ),
depthCompare( shadowCoord.xy.add( vec2( 0, dy3 ) ), shadowCoord.z ),
depthCompare( shadowCoord.xy.add( vec2( dx3, dy3 ) ), shadowCoord.z ),
depthCompare( shadowCoord.xy.add( vec2( dx0, dy1 ) ), shadowCoord.z ),
depthCompare( shadowCoord.xy.add( vec2( 0, dy1 ) ), shadowCoord.z ),
depthCompare( shadowCoord.xy.add( vec2( dx1, dy1 ) ), shadowCoord.z )
).mul( 1 / 17 );

} );

const shadowFilterLib = [ BasicShadowMap, PCFShadowMap ];

//

let overrideMaterial = null;

Expand All @@ -25,15 +75,14 @@ class AnalyticLightNode extends LightingNode {

this.light = light;

this.rtt = null;
this.shadowNode = null;
this.shadowMaskNode = null;

this.color = new Color();
this._defaultColorNode = uniform( this.color );
this._shadowColorNode = null;
this.colorNode = uniform( this.color );

this.baseColorNode = null;

this.colorNode = this._defaultColorNode;
this.shadowMap = null;
this.shadowNode = null;
this.shadowColorNode = null;

this.isAnalyticLightNode = true;

Expand All @@ -53,19 +102,11 @@ class AnalyticLightNode extends LightingNode {

setupShadow( builder ) {

const { object } = builder;

if ( object.receiveShadow === false ) {
const { object, renderer } = builder;

this.colorNode = this._defaultColorNode;
let shadowColorNode = this.shadowColorNode;

return;

}

let shadowNode = this.shadowNode;

if ( shadowNode === null ) {
if ( shadowColorNode === null ) {

if ( overrideMaterial === null ) {

Expand All @@ -75,17 +116,12 @@ class AnalyticLightNode extends LightingNode {

}

const shadow = this.light.shadow;
const rtt = builder.createRenderTarget( shadow.mapSize.width, shadow.mapSize.height );

const depthTexture = new DepthTexture();
depthTexture.minFilter = NearestFilter;
depthTexture.magFilter = NearestFilter;
depthTexture.image.width = shadow.mapSize.width;
depthTexture.image.height = shadow.mapSize.height;
depthTexture.compareFunction = LessCompare;

rtt.depthTexture = depthTexture;
const shadow = this.light.shadow;
const shadowMap = builder.createRenderTarget( shadow.mapSize.width, shadow.mapSize.height );
shadowMap.depthTexture = depthTexture;

shadow.camera.updateProjectionMatrix();

Expand All @@ -100,15 +136,9 @@ class AnalyticLightNode extends LightingNode {
let shadowCoord = uniform( shadow.matrix ).mul( position.add( normalWorld.mul( normalBias ) ) );
shadowCoord = shadowCoord.xyz.div( shadowCoord.w );

const frustumTest = shadowCoord.x.greaterThanEqual( 0 )
.and( shadowCoord.x.lessThanEqual( 1 ) )
.and( shadowCoord.y.greaterThanEqual( 0 ) )
.and( shadowCoord.y.lessThanEqual( 1 ) )
.and( shadowCoord.z.lessThanEqual( 1 ) );

let coordZ = shadowCoord.z.add( bias );

if ( builder.renderer.coordinateSystem === WebGPUCoordinateSystem ) {
if ( renderer.coordinateSystem === WebGPUCoordinateSystem ) {

coordZ = coordZ.mul( 2 ).sub( 1 ); // WebGPU: Convertion [ 0, 1 ] to [ - 1, 1 ]

Expand All @@ -120,94 +150,75 @@ class AnalyticLightNode extends LightingNode {
coordZ
);

const textureCompare = ( depthTexture, shadowCoord, compare ) => texture( depthTexture, shadowCoord ).compare( compare );
//const textureCompare = ( depthTexture, shadowCoord, compare ) => compare.step( texture( depthTexture, shadowCoord ) );

// BasicShadowMap

shadowNode = textureCompare( depthTexture, shadowCoord.xy, shadowCoord.z );

// PCFShadowMap
/*
const mapSize = reference( 'mapSize', 'vec2', shadow );
const radius = reference( 'radius', 'float', shadow );

const texelSize = vec2( 1 ).div( mapSize );
const dx0 = texelSize.x.negate().mul( radius );
const dy0 = texelSize.y.negate().mul( radius );
const dx1 = texelSize.x.mul( radius );
const dy1 = texelSize.y.mul( radius );
const dx2 = dx0.mul( 2 );
const dy2 = dy0.mul( 2 );
const dx3 = dx1.mul( 2 );
const dy3 = dy1.mul( 2 );

shadowNode = add(
textureCompare( depthTexture, shadowCoord.xy.add( vec2( dx0, dy0 ) ), shadowCoord.z ),
textureCompare( depthTexture, shadowCoord.xy.add( vec2( 0, dy0 ) ), shadowCoord.z ),
textureCompare( depthTexture, shadowCoord.xy.add( vec2( dx1, dy0 ) ), shadowCoord.z ),
textureCompare( depthTexture, shadowCoord.xy.add( vec2( dx2, dy2 ) ), shadowCoord.z ),
textureCompare( depthTexture, shadowCoord.xy.add( vec2( 0, dy2 ) ), shadowCoord.z ),
textureCompare( depthTexture, shadowCoord.xy.add( vec2( dx3, dy2 ) ), shadowCoord.z ),
textureCompare( depthTexture, shadowCoord.xy.add( vec2( dx0, 0 ) ), shadowCoord.z ),
textureCompare( depthTexture, shadowCoord.xy.add( vec2( dx2, 0 ) ), shadowCoord.z ),
textureCompare( depthTexture, shadowCoord.xy, shadowCoord.z ),
textureCompare( depthTexture, shadowCoord.xy.add( vec2( dx3, 0 ) ), shadowCoord.z ),
textureCompare( depthTexture, shadowCoord.xy.add( vec2( dx1, 0 ) ), shadowCoord.z ),
textureCompare( depthTexture, shadowCoord.xy.add( vec2( dx2, dy3 ) ), shadowCoord.z ),
textureCompare( depthTexture, shadowCoord.xy.add( vec2( 0, dy3 ) ), shadowCoord.z ),
textureCompare( depthTexture, shadowCoord.xy.add( vec2( dx3, dy3 ) ), shadowCoord.z ),
textureCompare( depthTexture, shadowCoord.xy.add( vec2( dx0, dy1 ) ), shadowCoord.z ),
textureCompare( depthTexture, shadowCoord.xy.add( vec2( 0, dy1 ) ), shadowCoord.z ),
textureCompare( depthTexture, shadowCoord.xy.add( vec2( dx1, dy1 ) ), shadowCoord.z )
).mul( 1 / 17 );
*/
const frustumTest = shadowCoord.x.greaterThanEqual( 0 )
.and( shadowCoord.x.lessThanEqual( 1 ) )
.and( shadowCoord.y.greaterThanEqual( 0 ) )
.and( shadowCoord.y.lessThanEqual( 1 ) )
.and( shadowCoord.z.lessThanEqual( 1 ) );

//

const shadowColor = texture( rtt.texture, shadowCoord );
const shadowMaskNode = frustumTest.mix( 1, shadowNode.mix( shadowColor.a.mix( 1, shadowColor ), 1 ) );
const filterFuncion = shadow.filterNode || shadowFilterLib[ renderer.shadowMap.type ] || null;

this.rtt = rtt;
this.colorNode = this.colorNode.mul( mix( 1, shadowMaskNode, shadowIntensity ) );
this._shadowColorNode = this.colorNode;
if ( filterFuncion === null ) {

this.shadowNode = shadowNode;
this.shadowMaskNode = shadowMaskNode;
throw new Error( 'THREE.WebGPURenderer: Shadow map type not supported yet.' );

//
}

this.updateBeforeType = NodeUpdateType.RENDER;
const shadowNode = frustumTest.cond( filterFuncion( { depthTexture, shadowCoord, shadow } ), float( 1 ) );

} else {
this.shadowMap = shadowMap;

this.colorNode = this._shadowColorNode;
this.shadowNode = shadowNode;
this.shadowColorNode = shadowColorNode = this.colorNode.mul( mix( 1, shadowNode, shadowIntensity ) );

this.baseColorNode = this.colorNode;

}

//

this.colorNode = shadowColorNode;

this.updateBeforeType = NodeUpdateType.RENDER;

}

setup( builder ) {

if ( this.light.castShadow ) this.setupShadow( builder );
else if ( this.shadowNode !== null ) this.disposeShadow();
this.colorNode = this.baseColorNode || this.colorNode;

if ( this.light.castShadow ) {

if ( builder.object.receiveShadow ) {

this.setupShadow( builder );

}

} else if ( this.shadowNode !== null ) {

this.disposeShadow();

}

}

updateShadow( frame ) {

const { rtt, light } = this;
const { shadowMap, light } = this;
const { renderer, scene, camera } = frame;

const currentOverrideMaterial = scene.overrideMaterial;

scene.overrideMaterial = overrideMaterial;

rtt.setSize( light.shadow.mapSize.width, light.shadow.mapSize.height );
shadowMap.setSize( light.shadow.mapSize.width, light.shadow.mapSize.height );

light.shadow.updateMatrices( light );
light.shadow.camera.layers.mask = camera.layers.mask;

const currentToneMapping = renderer.toneMapping;
const currentRenderTarget = renderer.getRenderTarget();
const currentRenderObjectFunction = renderer.getRenderObjectFunction();

Expand All @@ -221,30 +232,27 @@ class AnalyticLightNode extends LightingNode {

} );

renderer.setRenderTarget( rtt );
renderer.toneMapping = NoToneMapping;

renderer.setRenderTarget( shadowMap );
renderer.render( scene, light.shadow.camera );

renderer.setRenderTarget( currentRenderTarget );
renderer.setRenderObjectFunction( currentRenderObjectFunction );

renderer.toneMapping = currentToneMapping;

scene.overrideMaterial = currentOverrideMaterial;

}

disposeShadow() {

this.rtt.dispose();
this.shadowMap.dispose();
this.shadowMap = null;

this.shadowNode = null;
this.shadowMaskNode = null;
this._shadowColorNode = null;
this.rtt = null;
this.shadowColorNode = null;

this.baseColorNode = null;

this.colorNode = this._defaultColorNode;
this.updateBeforeType = NodeUpdateType.NONE;

}

Expand Down
3 changes: 1 addition & 2 deletions src/nodes/lighting/DirectionalLightNode.js
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Expand Up @@ -26,8 +26,7 @@ class DirectionalLightNode extends AnalyticLightNode {
lightingModel.direct( {
lightDirection,
lightColor,
reflectedLight,
shadowMask: this.shadowMaskNode
reflectedLight
}, builder.stack, builder );

}
Expand Down
3 changes: 1 addition & 2 deletions src/nodes/lighting/PointLightNode.js
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Expand Up @@ -54,8 +54,7 @@ class PointLightNode extends AnalyticLightNode {
lightingModel.direct( {
lightDirection,
lightColor,
reflectedLight,
shadowMask: this.shadowMaskNode
reflectedLight
}, builder.stack, builder );

}
Expand Down
3 changes: 1 addition & 2 deletions src/nodes/lighting/SpotLightNode.js
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Expand Up @@ -75,8 +75,7 @@ class SpotLightNode extends AnalyticLightNode {
lightingModel.direct( {
lightDirection,
lightColor,
reflectedLight,
shadowMask: this.shadowMaskNode
reflectedLight
}, builder.stack, builder );

}
Expand Down
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