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Examples: Added hashBlur and improve webgpu_backdrop_area example #29606

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Merged
merged 4 commits into from
Oct 10, 2024
Merged

Examples: Added hashBlur and improve webgpu_backdrop_area example #29606

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d849f33
added hashBlur
sunag Oct 10, 2024
1d31f7e
improve `webgpu_backdrop_area` example
sunag Oct 10, 2024
f1cbe1b
loop: fix generate const in `start` and `end`
sunag Oct 10, 2024
68c702d
Update webgpu_backdrop_area.jpg
sunag Oct 10, 2024
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26 changes: 26 additions & 0 deletions examples/jsm/tsl/display/hashBlur.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,26 @@
import { float, Fn, vec2, sin, rand, degrees, cos, Loop, vec4 } from 'three/tsl';

// https://www.shadertoy.com/view/4lXXWn

export const hashBlur = /*#__PURE__*/ Fn( ( [ textureNode, bluramount = float( 0.1 ), repeats = float( 45 ) ] ) => {

const draw = ( uv ) => textureNode.uv( uv );

const targetUV = textureNode.uvNode;
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@Mugen87 Mugen87 Oct 10, 2024 •
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There might be texture nodes without uvNode so maybe:

const targetUV = textureNode.uvNode || uv();

Without this fix, I can't use the blur with ssrPass.getTextureNode().

const blurred_image = vec4( 0. ).toVar();

//const map = textureNode.value;

Loop( { start: 0., end: repeats, type: 'float' }, ( { i } ) => {

const q = vec2( vec2( cos( degrees( i.div( repeats ).mul( 360. ) ) ), sin( degrees( i.div( repeats ).mul( 360. ) ) ) ).mul( rand( vec2( i, targetUV.x.add( targetUV.y ) ) ).add( bluramount ) ) );
const uv2 = vec2( targetUV.add( q.mul( bluramount ) ) );
blurred_image.addAssign( draw( uv2 ) );

} );

blurred_image.divAssign( repeats );

return blurred_image;

} );
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51 changes: 23 additions & 28 deletions examples/webgpu_backdrop_area.html
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Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,8 @@
<script type="module">

import * as THREE from 'three';
import { color, linearDepth, viewportLinearDepth, viewportSharedTexture, textureBicubic, viewportMipTexture, screenUV, checker, uv, modelScale } from 'three/tsl';
import { color, positionWorld, linearDepth, viewportLinearDepth, viewportSharedTexture, screenUV, hue, time, checker, uv, modelScale } from 'three/tsl';
import { hashBlur } from 'three/addons/tsl/display/hashBlur.js';

import { GUI } from 'three/addons/libs/lil-gui.module.min.js';

Expand All @@ -44,16 +45,12 @@
camera.position.set( 3, 2, 3 );

scene = new THREE.Scene();
scene.background = new THREE.Color( 0x777777 );
scene.backgroundNode = hue( screenUV.y.mix( color( 0x66bbff ), color( 0x4466ff ) ), time.mul( 0.1 ) );
camera.lookAt( 0, 1, 0 );

clock = new THREE.Clock();

const light = new THREE.PointLight( 0xffffff, 50 );
camera.add( light );
scene.add( camera );

const ambient = new THREE.AmbientLight( 0x4466ff, 1 );
const ambient = new THREE.AmbientLight( 0xffffff, 2 );
scene.add( ambient );

// model
Expand All @@ -79,43 +76,42 @@
const depthDistance = viewportLinearDepth.distance( linearDepth() );

const depthAlphaNode = depthDistance.oneMinus().smoothstep( .90, 2 ).mul( 10 ).saturate();
const depthBlurred = textureBicubic( viewportMipTexture(), depthDistance.smoothstep( 0, .6 ).mul( 40 * 5 ).clamp( 0, 5 ) );
const depthBlurred = hashBlur( viewportSharedTexture(), depthDistance.smoothstep( 0, .6 ).mul( 40 ).clamp().mul( .1 ) );

const blurredBlur = new THREE.MeshBasicNodeMaterial();
blurredBlur.backdropNode = depthBlurred.add( depthAlphaNode.mix( color( 0x0066ff ), 0 ) );
blurredBlur.backdropNode = depthBlurred.add( depthAlphaNode.mix( color( 0x003399 ).mul( .3 ), 0 ) );
blurredBlur.transparent = true;
blurredBlur.side = THREE.DoubleSide;

const volumeMaterial = new THREE.MeshBasicNodeMaterial();
volumeMaterial.colorNode = color( 0x0066ff );
volumeMaterial.backdropNode = viewportSharedTexture();
volumeMaterial.backdropAlphaNode = depthAlphaNode;
volumeMaterial.transparent = true;
volumeMaterial.side = THREE.DoubleSide;

const depthMaterial = new THREE.MeshBasicNodeMaterial();
depthMaterial.backdropNode = depthAlphaNode;
depthMaterial.transparent = true;
depthMaterial.side = THREE.DoubleSide;

const bicubicMaterial = new THREE.MeshBasicNodeMaterial();
bicubicMaterial.backdropNode = textureBicubic( viewportMipTexture(), 5 ); // @TODO: Move to alpha value [ 0, 1 ]
bicubicMaterial.backdropAlphaNode = checker( uv().mul( 3 ).mul( modelScale.xy ) );
bicubicMaterial.opacityNode = bicubicMaterial.backdropAlphaNode;
bicubicMaterial.transparent = true;
bicubicMaterial.side = THREE.DoubleSide;
const checkerMaterial = new THREE.MeshBasicNodeMaterial();
checkerMaterial.backdropNode = hashBlur( viewportSharedTexture(), .05 );
checkerMaterial.backdropAlphaNode = checker( uv().mul( 3 ).mul( modelScale.xy ) );
checkerMaterial.opacityNode = checkerMaterial.backdropAlphaNode;
checkerMaterial.transparent = true;
checkerMaterial.side = THREE.DoubleSide;

const pixelMaterial = new THREE.MeshBasicNodeMaterial();
pixelMaterial.backdropNode = viewportSharedTexture( screenUV.mul( 100 ).floor().div( 100 ) );
pixelMaterial.transparent = true;

// box / floor

const box = new THREE.Mesh( new THREE.BoxGeometry( 2, 2, 2 ), volumeMaterial );
const box = new THREE.Mesh( new THREE.BoxGeometry( 2, 2, 2 ), blurredBlur );
box.position.set( 0, 1, 0 );
box.renderOrder = 1;
scene.add( box );

const floor = new THREE.Mesh( new THREE.BoxGeometry( 1.99, .01, 1.99 ), new THREE.MeshBasicNodeMaterial( { color: 0x333333 } ) );
const floor = new THREE.Mesh( new THREE.BoxGeometry( 5, .01, 5 ), new THREE.MeshBasicNodeMaterial( {
color: 0xff6600,
opacityNode: positionWorld.xz.distance( 0 ).oneMinus().clamp(),
transparent: true,
depthWrite: false
} ) );
floor.position.set( 0, 0, 0 );
scene.add( floor );

Expand All @@ -125,8 +121,8 @@
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.setAnimationLoop( animate );
renderer.toneMapping = THREE.LinearToneMapping;
renderer.toneMappingExposure = 0.2;
renderer.toneMapping = THREE.NeutralToneMapping;
renderer.toneMappingExposure = .9;
document.body.appendChild( renderer.domElement );

const controls = new OrbitControls( camera, renderer.domElement );
Expand All @@ -139,9 +135,8 @@

const materials = {
'blurred': blurredBlur,
'volume': volumeMaterial,
'depth': depthMaterial,
'bicubic': bicubicMaterial,
'checker': checkerMaterial,
'pixel': pixelMaterial
};

Expand Down
4 changes: 2 additions & 2 deletions src/nodes/utils/LoopNode.js
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Expand Up @@ -102,10 +102,10 @@ class LoopNode extends Node {
condition = param.condition;
update = param.update;

if ( typeof start === 'number' ) start = start.toString();
if ( typeof start === 'number' ) start = builder.generateConst( type, start );
else if ( start && start.isNode ) start = start.build( builder, type );

if ( typeof end === 'number' ) end = end.toString();
if ( typeof end === 'number' ) end = builder.generateConst( type, end );
else if ( end && end.isNode ) end = end.build( builder, type );

if ( start !== undefined && end === undefined ) {
Expand Down