You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
257 lines
6.9 KiB
257 lines
6.9 KiB
3 years ago
|
<!DOCTYPE html>
|
||
|
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>three.js webgl - Depth Texture</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">
|
||
|
|
<style>
|
||
|
|
#error {
|
||
|
|
margin: auto;
|
||
|
|
margin-top: 40px;
|
||
|
|
display: block;
|
||
|
|
max-width: 400px;
|
||
|
|
padding: 20px;
|
||
|
|
background: #CE0808;
|
||
|
|
}
|
||
|
|
</style>
|
||
|
|
|
||
|
|
<script id="post-vert" type="x-shader/x-vertex">
|
||
|
|
varying vec2 vUv;
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
vUv = uv;
|
||
|
|
gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
<script id="post-frag" type="x-shader/x-fragment">
|
||
|
|
#include <packing>
|
||
|
|
|
||
|
|
varying vec2 vUv;
|
||
|
|
uniform sampler2D tDiffuse;
|
||
|
|
uniform sampler2D tDepth;
|
||
|
|
uniform float cameraNear;
|
||
|
|
uniform float cameraFar;
|
||
|
|
|
||
|
|
|
||
|
|
float readDepth( sampler2D depthSampler, vec2 coord ) {
|
||
|
|
float fragCoordZ = texture2D( depthSampler, coord ).x;
|
||
|
|
float viewZ = perspectiveDepthToViewZ( fragCoordZ, cameraNear, cameraFar );
|
||
|
|
return viewZToOrthographicDepth( viewZ, cameraNear, cameraFar );
|
||
|
|
}
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
//vec3 diffuse = texture2D( tDiffuse, vUv ).rgb;
|
||
|
|
float depth = readDepth( tDepth, vUv );
|
||
|
|
|
||
|
|
gl_FragColor.rgb = 1.0 - vec3( depth );
|
||
|
|
gl_FragColor.a = 1.0;
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div id="info">
|
||
|
|
<a href="https://threejs.org" target="_blank" rel="noopener">threejs</a> webgl - depth texture<br/>
|
||
|
|
Stores render target depth in a texture attachment.<br/>
|
||
|
|
Created by <a href="http://twitter.com/mattdesl" target="_blank" rel="noopener">@mattdesl</a>.
|
||
|
|
|
||
|
|
<div id="error" style="display: none;">
|
||
|
|
Your browser does not support <strong>WEBGL_depth_texture</strong>.<br/><br/>
|
||
|
|
This demo will not work.
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<!-- Import maps polyfill -->
|
||
|
|
<!-- Remove this when import maps will be widely supported -->
|
||
|
|
<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
|
||
|
|
|
||
|
|
<script type="importmap">
|
||
|
|
{
|
||
|
|
"imports": {
|
||
|
|
"three": "../build/three.module.js",
|
||
|
|
"three/addons/": "./jsm/"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<script type="module">
|
||
|
|
|
||
|
|
import * as THREE from 'three';
|
||
|
|
|
||
|
|
import Stats from 'three/addons/libs/stats.module.js';
|
||
|
|
|
||
|
|
import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
|
||
|
|
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
|
||
|
|
|
||
|
|
let camera, scene, renderer, controls, stats;
|
||
|
|
let target;
|
||
|
|
let postScene, postCamera, postMaterial;
|
||
|
|
let supportsExtension = true;
|
||
|
|
|
||
|
|
const params = {
|
||
|
|
format: THREE.DepthFormat,
|
||
|
|
type: THREE.UnsignedShortType
|
||
|
|
};
|
||
|
|
|
||
|
|
const formats = { DepthFormat: THREE.DepthFormat, DepthStencilFormat: THREE.DepthStencilFormat };
|
||
|
|
const types = { UnsignedShortType: THREE.UnsignedShortType, UnsignedIntType: THREE.UnsignedIntType, UnsignedInt248Type: THREE.UnsignedInt248Type };
|
||
|
|
|
||
|
|
init();
|
||
|
|
animate();
|
||
|
|
|
||
|
|
function init() {
|
||
|
|
|
||
|
|
renderer = new THREE.WebGLRenderer();
|
||
|
|
|
||
|
|
if ( renderer.capabilities.isWebGL2 === false && renderer.extensions.has( 'WEBGL_depth_texture' ) === false ) {
|
||
|
|
|
||
|
|
supportsExtension = false;
|
||
|
|
document.querySelector( '#error' ).style.display = 'block';
|
||
|
|
return;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
||
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
||
|
|
document.body.appendChild( renderer.domElement );
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
stats = new Stats();
|
||
|
|
document.body.appendChild( stats.dom );
|
||
|
|
|
||
|
|
camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 0.01, 50 );
|
||
|
|
camera.position.z = 4;
|
||
|
|
|
||
|
|
controls = new OrbitControls( camera, renderer.domElement );
|
||
|
|
controls.enableDamping = true;
|
||
|
|
|
||
|
|
// Create a render target with depth texture
|
||
|
|
setupRenderTarget();
|
||
|
|
|
||
|
|
// Our scene
|
||
|
|
setupScene();
|
||
|
|
|
||
|
|
// Setup post-processing step
|
||
|
|
setupPost();
|
||
|
|
|
||
|
|
onWindowResize();
|
||
|
|
window.addEventListener( 'resize', onWindowResize );
|
||
|
|
|
||
|
|
//
|
||
|
|
const gui = new GUI( { width: 300 } );
|
||
|
|
|
||
|
|
gui.add( params, 'format', formats ).onChange( setupRenderTarget );
|
||
|
|
gui.add( params, 'type', types ).onChange( setupRenderTarget );
|
||
|
|
gui.open();
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function setupRenderTarget() {
|
||
|
|
|
||
|
|
if ( target ) target.dispose();
|
||
|
|
|
||
|
|
const format = parseFloat( params.format );
|
||
|
|
const type = parseFloat( params.type );
|
||
|
|
|
||
|
|
target = new THREE.WebGLRenderTarget( window.innerWidth, window.innerHeight );
|
||
|
|
target.texture.minFilter = THREE.NearestFilter;
|
||
|
|
target.texture.magFilter = THREE.NearestFilter;
|
||
|
|
target.stencilBuffer = ( format === THREE.DepthStencilFormat ) ? true : false;
|
||
|
|
target.depthTexture = new THREE.DepthTexture();
|
||
|
|
target.depthTexture.format = format;
|
||
|
|
target.depthTexture.type = type;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function setupPost() {
|
||
|
|
|
||
|
|
// Setup post processing stage
|
||
|
|
postCamera = new THREE.OrthographicCamera( - 1, 1, 1, - 1, 0, 1 );
|
||
|
|
postMaterial = new THREE.ShaderMaterial( {
|
||
|
|
vertexShader: document.querySelector( '#post-vert' ).textContent.trim(),
|
||
|
|
fragmentShader: document.querySelector( '#post-frag' ).textContent.trim(),
|
||
|
|
uniforms: {
|
||
|
|
cameraNear: { value: camera.near },
|
||
|
|
cameraFar: { value: camera.far },
|
||
|
|
tDiffuse: { value: null },
|
||
|
|
tDepth: { value: null }
|
||
|
|
}
|
||
|
|
} );
|
||
|
|
const postPlane = new THREE.PlaneGeometry( 2, 2 );
|
||
|
|
const postQuad = new THREE.Mesh( postPlane, postMaterial );
|
||
|
|
postScene = new THREE.Scene();
|
||
|
|
postScene.add( postQuad );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function setupScene() {
|
||
|
|
|
||
|
|
scene = new THREE.Scene();
|
||
|
|
|
||
|
|
const geometry = new THREE.TorusKnotGeometry( 1, 0.3, 128, 64 );
|
||
|
|
const material = new THREE.MeshBasicMaterial( { color: 'blue' } );
|
||
|
|
|
||
|
|
const count = 50;
|
||
|
|
const scale = 5;
|
||
|
|
|
||
|
|
for ( let i = 0; i < count; i ++ ) {
|
||
|
|
|
||
|
|
const r = Math.random() * 2.0 * Math.PI;
|
||
|
|
const z = ( Math.random() * 2.0 ) - 1.0;
|
||
|
|
const zScale = Math.sqrt( 1.0 - z * z ) * scale;
|
||
|
|
|
||
|
|
const mesh = new THREE.Mesh( geometry, material );
|
||
|
|
mesh.position.set(
|
||
|
|
Math.cos( r ) * zScale,
|
||
|
|
Math.sin( r ) * zScale,
|
||
|
|
z * scale
|
||
|
|
);
|
||
|
|
mesh.rotation.set( Math.random(), Math.random(), Math.random() );
|
||
|
|
scene.add( mesh );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function onWindowResize() {
|
||
|
|
|
||
|
|
const aspect = window.innerWidth / window.innerHeight;
|
||
|
|
camera.aspect = aspect;
|
||
|
|
camera.updateProjectionMatrix();
|
||
|
|
|
||
|
|
const dpr = renderer.getPixelRatio();
|
||
|
|
target.setSize( window.innerWidth * dpr, window.innerHeight * dpr );
|
||
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function animate() {
|
||
|
|
|
||
|
|
if ( ! supportsExtension ) return;
|
||
|
|
|
||
|
|
requestAnimationFrame( animate );
|
||
|
|
|
||
|
|
// render scene into target
|
||
|
|
renderer.setRenderTarget( target );
|
||
|
|
renderer.render( scene, camera );
|
||
|
|
|
||
|
|
// render post FX
|
||
|
|
postMaterial.uniforms.tDiffuse.value = target.texture;
|
||
|
|
postMaterial.uniforms.tDepth.value = target.depthTexture;
|
||
|
|
|
||
|
|
renderer.setRenderTarget( null );
|
||
|
|
renderer.render( postScene, postCamera );
|
||
|
|
|
||
|
|
controls.update(); // required because damping is enabled
|
||
|
|
|
||
|
|
stats.update();
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
</script>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|