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未验证 提交 8e974ee3 编写于 作者: M Mr.doob 提交者： GitHub
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Merge pull request #12932 from wongbryan/pixel-shader 

Pixelation shader w/ example
上级 92dacdcc b04eed4c
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examples/js/shaders/PixelShader.js 0 → 100644
浏览文件 @ 8e974ee3
/**
* @author wongbryan / http://wongbryan.github.io
*
* Pixelation shader
*/
THREE.PixelShader = {
uniforms: {
"tDiffuse": { value: null },
"resolution": { value: null },
"pixelSize": { value: 1. },
},
vertexShader: [
"varying highp vec2 vUv;",
"void main() {",
"vUv = uv;",
"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
"}"
].join( "\n" ),
fragmentShader: [
"uniform sampler2D tDiffuse;",
"uniform float pixelSize;",
"uniform vec2 resolution;",
"varying highp vec2 vUv;",
"void main(){",
"vec2 dxy = pixelSize / resolution;",
"vec2 coord = dxy * floor( vUv / dxy );",
"gl_FragColor = texture2D(tDiffuse, coord);",
"}"
].join( "\n" )
};
examples/webgl_postprocessing_pixel.html 0 → 100644
浏览文件 @ 8e974ee3
<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - postprocessing - pixel shader</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<style>
body {
background-color: #000000;
margin: 0px;
overflow: hidden;
font-family:Monospace;
font-size:13px;
/*text-align:center;*/
font-weight: lighter;
}
a {
color: gray;
font-weight: bold;
}
#info {
color: gray;
position: absolute;
bottom: 0px;
width: 100%;
padding: 15px;
}
.dg.ac {
z-index: 1 !important;
}
</style>
</head>
<body>
<script src="../build/three.js"></script>
<script src="js/shaders/CopyShader.js"></script>
<script src="js/shaders/PixelShader.js"></script>
<script src="js/postprocessing/EffectComposer.js"></script>
<script src="js/postprocessing/RenderPass.js"></script>
<script src="js/postprocessing/ShaderPass.js"></script>
<script src="js/controls/TrackballControls.js"></script>
<script src='js/libs/dat.gui.min.js'></script>
<div id="container"></div>
<div id="info">
<a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - pixel shader example<br/>
shader by <a href="http://wongbryan.github.io">wongbryan</a>
</div>
<script>
var camera, scene, renderer, gui, composer;
var pixelPass, params;
var geomData = [], group;
init();
animate();
function updateGUI() {
pixelPass.uniforms.pixelSize.value = params.pixelSize;
}
function resize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
pixelPass.uniforms.resolution.value.set( window.innerWidth, window.innerHeight ).multiplyScalar( window.devicePixelRatio );
}
function init() {
var container = document.getElementById( 'container' );
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.setClearColor( 0xbfe7ff );
container.appendChild( renderer.domElement );
camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.set( 0, 0, 30 );
controls = new THREE.TrackballControls( camera, renderer.domElement );
controls.rotateSpeed = 2.0;
controls.panSpeed = 0.8;
controls.zoomSpeed = 1.5;
scene = new THREE.Scene();
var hemisphereLight = new THREE.HemisphereLight( 0xfceafc, 0x000000, .8 );
scene.add( hemisphereLight );
var dirLight = new THREE.DirectionalLight( 0xffffff, .5 );
dirLight.position.set( 150, 75, 150 );
scene.add( dirLight );
var dirLight2 = new THREE.DirectionalLight( 0xffffff, .2 );
dirLight2.position.set( - 150, 75, - 150 );
scene.add( dirLight2 );
var dirLight3 = new THREE.DirectionalLight( 0xffffff, .1 );
dirLight3.position.set( 0, 125, 0 );
scene.add( dirLight3 );
scene.add( hemisphereLight );
scene.add( dirLight );
scene.add( dirLight2 );
scene.add( dirLight3 );
geomData.push( new THREE.SphereGeometry( 1, 64, 64 ) );
geomData.push( new THREE.BoxGeometry( 1, 1, 1 ) );
geomData.push( new THREE.ConeGeometry( 1, 1, 32 ) );
geomData.push( new THREE.TetrahedronGeometry( 1 ) );
geomData.push( new THREE.TorusKnotGeometry( 1, .4 ) );
var numShapes = 25;
group = new THREE.Group();
for ( var i = 0; i < numShapes; i ++ ) {
var geom = geomData[ Math.floor( Math.random() * geomData.length ) ];
var color = new THREE.Color();
color.setHSL( Math.random(), .7 + .2 * Math.random(), .5 + .1 * Math.random() );
var mat = new THREE.MeshPhongMaterial( { color: color, shininess: 200 } );
var mesh = new THREE.Mesh( geom, mat );
var s = 4 + Math.random() * 10;
mesh.scale.set( s, s, s );
mesh.position.set( Math.random() - 0.5, Math.random() - 0.5, Math.random() - 0.5 ).normalize();
mesh.position.multiplyScalar( Math.random() * 200 );
mesh.rotation.set( Math.random() * 2, Math.random() * 2, Math.random() * 2 );
group.add( mesh );
}
scene.add( group );
composer = new THREE.EffectComposer( renderer );
composer.addPass( new THREE.RenderPass( scene, camera ) );
pixelPass = new THREE.ShaderPass( THREE.PixelShader );
pixelPass.uniforms.resolution.value = new THREE.Vector2( window.innerWidth, window.innerHeight );
pixelPass.uniforms.resolution.value.multiplyScalar( window.devicePixelRatio );
pixelPass.renderToScreen = true;
composer.addPass( pixelPass );
window.addEventListener( 'resize', resize );
params = {
pixelSize: 128,
postprocessing: true
};
gui = new dat.GUI();
gui.add( params, 'pixelSize' ).min( 2 ).max( 256 ).step( 2 );
gui.add( params, 'postprocessing' );
}
function update() {
controls.update();
updateGUI();
group.rotation.y += .0015;
group.rotation.z += .001;
}
function animate() {
update();
if ( params.postprocessing ) {
composer.render();
} else {
renderer.render( scene, camera );
}
window.requestAnimationFrame( animate );
}
</script>
</body>
</html>
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