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18-postprocessing-blur.html
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18-postprocessing-blur.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - post processing: luminance</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: #f0f0f0;
margin: 0px;
overflow: hidden;
}
#info {
position: absolute;
top: 0px; width: 100%;
color: #222;
padding: 5px;
font-family: Monospace;
font-size: 13px;
text-align: center;
}
a {
color: #000;
text-decoration: none;
}
a:hover {
color: #0080ff;
}
</style>
</head>
<body>
<div id="info">
<a href="https://github.com/robertoranon/int3D" target="_blank">Interactive 3D Graphics 2017 code</a> - post processing: luminance<br />
</div>
<script src="lib/three.min.js"></script>
<script src="lib/stats.min.js"></script>
<script src="lib/OrbitControls.js"></script>
<script src='lib/dat.gui.min.js'></script>
<script src='lib/OBJLoader.js'></script>
<script src="lib/EffectComposer.js"></script>
<script src="lib/CopyShader.js"></script>
<script src="lib/ShaderPass.js"></script>
<script src="lib/RenderPass.js"></script>
<script src="lib/GammaCorrectionShader.js"></script>
<!-- three.js code -->
<script>
// Gaussian kernel
// 1 2 1
// 2 4 2
// 1 2 1
var blurShader = {
uniforms: {
"tDiffuse": { type: "t", value: null },
"width": { type: "f", value: 0.0 },
"height": { type: "f", value: 0.0 },
"kernel": { type: "fv1", value: [0.0625, 0.125, 0.0625, 0.125, 0.25, 0.125, 0.0625, 0.125, 0.0625]}
},
vertexShader: [
"varying vec2 vUv;",
"void main() {",
"vUv = uv;",
"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
"}"
].join("\n"),
fragmentShader: [
"uniform sampler2D tDiffuse;",
"varying vec2 vUv;",
"uniform float width;",
"uniform float height;",
"uniform float kernel[9];",
"void main(void)",
"{",
"float step_w = 1.0/width;",
"float step_h = 1.0/height;",
"vec2 offset[9];",
"offset[0] = vec2(-step_w, -step_h);",
"offset[1] = vec2(0.0, -step_h);",
"offset[2] = vec2(step_w, -step_h);",
"offset[3] = vec2(-step_w, 0.0);",
"offset[4] = vec2(0.0, 0.0);",
"offset[5] = vec2(step_w, 0.0);",
"offset[6] = vec2(-step_w, step_h);",
"offset[7] = vec2(0.0, step_h);",
"offset[8] = vec2(step_w, step_h);",
"vec3 sum = vec3(0.0);",
"for( int i=0; i<9; i++ )",
"sum += texture2D(tDiffuse, vUv + offset[i]).rgb * kernel[i];",
"gl_FragColor = vec4(sum,1.0);",
"}",
].join("\n")
};
var renderer = new THREE.WebGLRenderer( { antialias: true } );
var camera = new THREE.PerspectiveCamera( 35, window.innerWidth / window.innerHeight, 1, 1000 );
var controls = new THREE.OrbitControls( camera, renderer.domElement );
var scene = new THREE.Scene();
var blurEffect;
var guiParams = {
enabled: true,
}
var normalMap = loadTexture( "textures/normal.jpg" );
var loader = new THREE.CubeTextureLoader();
loader.setPath( 'textures/cubemap/' );
var textureCube = loader.load( [
'posx.png', 'negx.png',
'posy.png', 'negy.png',
'posz.png', 'negz.png'
] );
scene.background = textureCube;
textureCube.minFilter = THREE.LinearMipMapLinearFilter;
var ourMaterial = new THREE.MeshStandardMaterial({
envMap: textureCube,
roughness: 0.5,
normalMap: normalMap,
normalScale: new THREE.Vector2(1,1),
color: new THREE.Color(0.8,0.8,0.8),
metalness: 1,
});
var loader = new THREE.OBJLoader();
loader.load( "models/ninjaHead_Low.obj", function ( group ) {
geometry = group.children[ 0 ].geometry;
geometry.center();
mesh = new THREE.Mesh( geometry, ourMaterial );
mesh.scale.multiplyScalar( 0.1 );
scene.add( mesh );
} );
var gui;
var stats = new Stats();
function loadTexture(file) {
var texture = new THREE.TextureLoader().load( file , function ( texture ) {
texture.minFilter = THREE.LinearMipMapLinearFilter;
texture.anisotropy = renderer.getMaxAnisotropy();
texture.wrapS = texture.wrapT = THREE.RepeatWrapping;
texture.offset.set( 0, 0 );
texture.needsUpdate = true;
render();
} )
return texture;
}
function init() {
renderer.setClearColor( 0xf0f0f0 );
camera.position.set( 0, 0, 10 );
scene.add( camera );
document.body.appendChild( renderer.domElement );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.gammaInput = true;
renderer.gammaOutput = false;
controls.minDistance = 1;
controls.maxDistance = 100;
controls.enablePan = false;
controls.update();
window.addEventListener( 'resize', onResize, false );
stats.domElement.style.position = 'absolute';
stats.domElement.style.top = '0px';
document.body.appendChild( stats.domElement );
composer = new THREE.EffectComposer( renderer );
composer.addPass( new THREE.RenderPass( scene, camera ) );
blurEffect = new THREE.ShaderPass( blurShader );
blurEffect.uniforms.width.value = window.innerWidth;
blurEffect.uniforms.height.value = window.innerHeight;
composer.addPass( blurEffect );
passthrough = new THREE.ShaderPass( THREE.GammaCorrectionShader);
passthrough.renderToScreen = true;
composer.addPass( passthrough );
}
function onResize() {
renderer.setSize( window.innerWidth, window.innerHeight );
camera.aspect = ( window.innerWidth / window.innerHeight );
camera.updateProjectionMatrix();
blurEffect.uniforms.width.value = window.innerWidth;
blurEffect.uniforms.height.value = window.innerHeight;
}
function update() {
requestAnimationFrame( update );
stats.update();
render();
}
function render() {
composer.render();
}
function clearGui() {
if ( gui ) gui.destroy();
gui = new dat.GUI();
gui.open();
}
function buildGui() {
clearGui();
gui.add(guiParams,'enabled').onChange( function (value) {
blurEffect.enabled = value;
});
}
init();
buildGui();
update();
render();
</script>
</body>
</html>