You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
164 lines
3.9 KiB
HTML
164 lines
3.9 KiB
HTML
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<title>three.js webgpu - volumetric perlin</title>
|
|
<meta charset="utf-8">
|
|
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
|
|
<link type="text/css" rel="stylesheet" href="main.css">
|
|
</head>
|
|
|
|
<body>
|
|
<div id="info">
|
|
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgpu - volumetric perlin
|
|
</div>
|
|
|
|
<script type="importmap">
|
|
{
|
|
"imports": {
|
|
"three": "../build/three.webgpu.js",
|
|
"three/webgpu": "../build/three.webgpu.js",
|
|
"three/tsl": "../build/three.tsl.js",
|
|
"three/addons/": "./jsm/"
|
|
}
|
|
}
|
|
</script>
|
|
|
|
<script type="module">
|
|
|
|
import * as THREE from 'three';
|
|
import { Break, If, vec3, vec4, texture3D, uniform, Fn } from 'three/tsl';
|
|
|
|
import { RaymarchingBox } from 'three/addons/tsl/utils/Raymarching.js';
|
|
|
|
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
|
|
import { ImprovedNoise } from 'three/addons/math/ImprovedNoise.js';
|
|
|
|
import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
|
|
|
|
let renderer, scene, camera;
|
|
let mesh;
|
|
|
|
init();
|
|
|
|
function init() {
|
|
|
|
renderer = new THREE.WebGPURenderer( { antialias: true } );
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
renderer.setAnimationLoop( animate );
|
|
document.body.appendChild( renderer.domElement );
|
|
|
|
scene = new THREE.Scene();
|
|
|
|
camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.1, 100 );
|
|
camera.position.set( 0, 0, 2 );
|
|
|
|
new OrbitControls( camera, renderer.domElement );
|
|
|
|
// Texture
|
|
|
|
const size = 128;
|
|
const data = new Uint8Array( size * size * size );
|
|
|
|
let i = 0;
|
|
const perlin = new ImprovedNoise();
|
|
const vector = new THREE.Vector3();
|
|
|
|
for ( let z = 0; z < size; z ++ ) {
|
|
|
|
for ( let y = 0; y < size; y ++ ) {
|
|
|
|
for ( let x = 0; x < size; x ++ ) {
|
|
|
|
vector.set( x, y, z ).divideScalar( size );
|
|
|
|
const d = perlin.noise( vector.x * 6.5, vector.y * 6.5, vector.z * 6.5 );
|
|
|
|
data[ i ++ ] = d * 128 + 128;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
const texture = new THREE.Data3DTexture( data, size, size, size );
|
|
texture.format = THREE.RedFormat;
|
|
texture.minFilter = THREE.LinearFilter;
|
|
texture.magFilter = THREE.LinearFilter;
|
|
texture.unpackAlignment = 1;
|
|
texture.needsUpdate = true;
|
|
|
|
// Shader
|
|
|
|
const opaqueRaymarchingTexture = Fn( ( { texture, steps, threshold } ) => {
|
|
|
|
const finalColor = vec4( 0 ).toVar();
|
|
|
|
RaymarchingBox( steps, ( { positionRay } ) => {
|
|
|
|
const mapValue = texture.sample( positionRay.add( 0.5 ) ).r.toVar();
|
|
|
|
If( mapValue.greaterThan( threshold ), () => {
|
|
|
|
const p = vec3( positionRay ).add( 0.5 );
|
|
|
|
finalColor.rgb.assign( texture.normal( p ).mul( 0.5 ).add( positionRay.mul( 1.5 ).add( 0.25 ) ) );
|
|
finalColor.a.assign( 1 );
|
|
Break();
|
|
|
|
} );
|
|
|
|
} );
|
|
|
|
return finalColor;
|
|
|
|
} );
|
|
|
|
//
|
|
|
|
const threshold = uniform( 0.6 );
|
|
const steps = uniform( 200 );
|
|
|
|
const material = new THREE.NodeMaterial();
|
|
material.colorNode = opaqueRaymarchingTexture( {
|
|
texture: texture3D( texture, null, 0 ),
|
|
steps,
|
|
threshold
|
|
} );
|
|
material.side = THREE.BackSide;
|
|
material.transparent = true;
|
|
|
|
mesh = new THREE.Mesh( new THREE.BoxGeometry( 1, 1, 1 ), material );
|
|
scene.add( mesh );
|
|
|
|
//
|
|
|
|
const gui = new GUI();
|
|
gui.add( threshold, 'value', 0, 1, 0.01 ).name( 'threshold' );
|
|
gui.add( steps, 'value', 0, 300, 1 ).name( 'steps' );
|
|
|
|
window.addEventListener( 'resize', onWindowResize );
|
|
|
|
}
|
|
|
|
function onWindowResize() {
|
|
|
|
camera.aspect = window.innerWidth / window.innerHeight;
|
|
camera.updateProjectionMatrix();
|
|
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
|
|
}
|
|
|
|
function animate() {
|
|
|
|
renderer.render( scene, camera );
|
|
|
|
}
|
|
|
|
</script>
|
|
|
|
</body>
|
|
</html>
|