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.
262 lines
6.3 KiB
262 lines
6.3 KiB
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<title>three.js webgl - render-to-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">
|
|
</head>
|
|
<body>
|
|
|
|
<div id="container"></div>
|
|
<div id="info"><a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> render-to-texture webgl example</div>
|
|
|
|
<script id="fragment_shader_screen" type="x-shader/x-fragment">
|
|
|
|
varying vec2 vUv;
|
|
uniform sampler2D tDiffuse;
|
|
|
|
void main() {
|
|
|
|
gl_FragColor = texture2D( tDiffuse, vUv );
|
|
|
|
}
|
|
|
|
</script>
|
|
|
|
<script id="fragment_shader_pass_1" type="x-shader/x-fragment">
|
|
|
|
varying vec2 vUv;
|
|
uniform float time;
|
|
|
|
void main() {
|
|
|
|
float r = vUv.x;
|
|
if( vUv.y < 0.5 ) r = 0.0;
|
|
float g = vUv.y;
|
|
if( vUv.x < 0.5 ) g = 0.0;
|
|
|
|
gl_FragColor = vec4( r, g, time, 1.0 );
|
|
|
|
}
|
|
|
|
</script>
|
|
|
|
<script id="vertexShader" type="x-shader/x-vertex">
|
|
|
|
varying vec2 vUv;
|
|
|
|
void main() {
|
|
|
|
vUv = uv;
|
|
gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
|
|
|
|
}
|
|
|
|
</script>
|
|
|
|
<!-- 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';
|
|
|
|
let container, stats;
|
|
|
|
let cameraRTT, camera, sceneRTT, sceneScreen, scene, renderer, zmesh1, zmesh2;
|
|
|
|
let mouseX = 0, mouseY = 0;
|
|
|
|
const windowHalfX = window.innerWidth / 2;
|
|
const windowHalfY = window.innerHeight / 2;
|
|
|
|
let rtTexture, material, quad;
|
|
|
|
let delta = 0.01;
|
|
|
|
init();
|
|
animate();
|
|
|
|
function init() {
|
|
|
|
container = document.getElementById( 'container' );
|
|
|
|
camera = new THREE.PerspectiveCamera( 30, window.innerWidth / window.innerHeight, 1, 10000 );
|
|
camera.position.z = 100;
|
|
|
|
cameraRTT = new THREE.OrthographicCamera( window.innerWidth / - 2, window.innerWidth / 2, window.innerHeight / 2, window.innerHeight / - 2, - 10000, 10000 );
|
|
cameraRTT.position.z = 100;
|
|
|
|
//
|
|
|
|
scene = new THREE.Scene();
|
|
sceneRTT = new THREE.Scene();
|
|
sceneScreen = new THREE.Scene();
|
|
|
|
let light = new THREE.DirectionalLight( 0xffffff );
|
|
light.position.set( 0, 0, 1 ).normalize();
|
|
sceneRTT.add( light );
|
|
|
|
light = new THREE.DirectionalLight( 0xffaaaa, 1.5 );
|
|
light.position.set( 0, 0, - 1 ).normalize();
|
|
sceneRTT.add( light );
|
|
|
|
rtTexture = new THREE.WebGLRenderTarget( window.innerWidth, window.innerHeight );
|
|
|
|
material = new THREE.ShaderMaterial( {
|
|
|
|
uniforms: { time: { value: 0.0 } },
|
|
vertexShader: document.getElementById( 'vertexShader' ).textContent,
|
|
fragmentShader: document.getElementById( 'fragment_shader_pass_1' ).textContent
|
|
|
|
} );
|
|
|
|
const materialScreen = new THREE.ShaderMaterial( {
|
|
|
|
uniforms: { tDiffuse: { value: rtTexture.texture } },
|
|
vertexShader: document.getElementById( 'vertexShader' ).textContent,
|
|
fragmentShader: document.getElementById( 'fragment_shader_screen' ).textContent,
|
|
|
|
depthWrite: false
|
|
|
|
} );
|
|
|
|
const plane = new THREE.PlaneGeometry( window.innerWidth, window.innerHeight );
|
|
|
|
quad = new THREE.Mesh( plane, material );
|
|
quad.position.z = - 100;
|
|
sceneRTT.add( quad );
|
|
|
|
const torusGeometry = new THREE.TorusGeometry( 100, 25, 15, 30 );
|
|
|
|
const mat1 = new THREE.MeshPhongMaterial( { color: 0x555555, specular: 0xffaa00, shininess: 5 } );
|
|
const mat2 = new THREE.MeshPhongMaterial( { color: 0x550000, specular: 0xff2200, shininess: 5 } );
|
|
|
|
zmesh1 = new THREE.Mesh( torusGeometry, mat1 );
|
|
zmesh1.position.set( 0, 0, 100 );
|
|
zmesh1.scale.set( 1.5, 1.5, 1.5 );
|
|
sceneRTT.add( zmesh1 );
|
|
|
|
zmesh2 = new THREE.Mesh( torusGeometry, mat2 );
|
|
zmesh2.position.set( 0, 150, 100 );
|
|
zmesh2.scale.set( 0.75, 0.75, 0.75 );
|
|
sceneRTT.add( zmesh2 );
|
|
|
|
quad = new THREE.Mesh( plane, materialScreen );
|
|
quad.position.z = - 100;
|
|
sceneScreen.add( quad );
|
|
|
|
const n = 5,
|
|
geometry = new THREE.SphereGeometry( 10, 64, 32 ),
|
|
material2 = new THREE.MeshBasicMaterial( { color: 0xffffff, map: rtTexture.texture } );
|
|
|
|
for ( let j = 0; j < n; j ++ ) {
|
|
|
|
for ( let i = 0; i < n; i ++ ) {
|
|
|
|
const mesh = new THREE.Mesh( geometry, material2 );
|
|
|
|
mesh.position.x = ( i - ( n - 1 ) / 2 ) * 20;
|
|
mesh.position.y = ( j - ( n - 1 ) / 2 ) * 20;
|
|
mesh.position.z = 0;
|
|
|
|
mesh.rotation.y = - Math.PI / 2;
|
|
|
|
scene.add( mesh );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
renderer = new THREE.WebGLRenderer();
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
renderer.autoClear = false;
|
|
|
|
container.appendChild( renderer.domElement );
|
|
|
|
stats = new Stats();
|
|
container.appendChild( stats.dom );
|
|
|
|
document.addEventListener( 'mousemove', onDocumentMouseMove );
|
|
|
|
}
|
|
|
|
function onDocumentMouseMove( event ) {
|
|
|
|
mouseX = ( event.clientX - windowHalfX );
|
|
mouseY = ( event.clientY - windowHalfY );
|
|
|
|
}
|
|
|
|
//
|
|
|
|
function animate() {
|
|
|
|
requestAnimationFrame( animate );
|
|
|
|
render();
|
|
stats.update();
|
|
|
|
}
|
|
|
|
function render() {
|
|
|
|
const time = Date.now() * 0.0015;
|
|
|
|
camera.position.x += ( mouseX - camera.position.x ) * .05;
|
|
camera.position.y += ( - mouseY - camera.position.y ) * .05;
|
|
|
|
camera.lookAt( scene.position );
|
|
|
|
if ( zmesh1 && zmesh2 ) {
|
|
|
|
zmesh1.rotation.y = - time;
|
|
zmesh2.rotation.y = - time + Math.PI / 2;
|
|
|
|
}
|
|
|
|
if ( material.uniforms[ 'time' ].value > 1 || material.uniforms[ 'time' ].value < 0 ) {
|
|
|
|
delta *= - 1;
|
|
|
|
}
|
|
|
|
material.uniforms[ 'time' ].value += delta;
|
|
|
|
|
|
// Render first scene into texture
|
|
|
|
renderer.setRenderTarget( rtTexture );
|
|
renderer.clear();
|
|
renderer.render( sceneRTT, cameraRTT );
|
|
|
|
// Render full screen quad with generated texture
|
|
|
|
renderer.setRenderTarget( null );
|
|
renderer.clear();
|
|
renderer.render( sceneScreen, cameraRTT );
|
|
|
|
// Render second scene to screen
|
|
// (using first scene as regular texture)
|
|
|
|
renderer.render( scene, camera );
|
|
|
|
}
|
|
|
|
</script>
|
|
</body>
|
|
</html>
|
|
|