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.
173 lines
4.0 KiB
173 lines
4.0 KiB
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<title>three.js webgl - postprocessing - sobel (edge detection)</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:#777;
|
|
padding:0;
|
|
margin:0;
|
|
font-weight: bold;
|
|
overflow:hidden;
|
|
}
|
|
|
|
#info {
|
|
position: absolute;
|
|
top: 0px;
|
|
width: 100%;
|
|
color: #ffffff;
|
|
padding: 5px;
|
|
font-family:Monospace;
|
|
font-size:13px;
|
|
text-align:center;
|
|
}
|
|
|
|
a {
|
|
color: #ffffff;
|
|
}
|
|
</style>
|
|
</head>
|
|
<body>
|
|
|
|
<script src="../build/three.js"></script>
|
|
<script src="js/controls/OrbitControls.js"></script>
|
|
<script src="js/WebGL.js"></script>
|
|
<script src="js/libs/dat.gui.min.js"></script>
|
|
|
|
<script src="js/shaders/CopyShader.js"></script>
|
|
<script src="js/shaders/LuminosityShader.js"></script>
|
|
<script src="js/shaders/SobelOperatorShader.js"></script>
|
|
|
|
<script src="js/postprocessing/EffectComposer.js"></script>
|
|
<script src="js/postprocessing/RenderPass.js"></script>
|
|
<script src="js/postprocessing/ShaderPass.js"></script>
|
|
|
|
<div id="info">
|
|
<a href="https://threejs.org" target="_blank" rel="noopener noreferrer">three.js</a> - webgl - postprocessing - sobel (edge detection)
|
|
</div>
|
|
|
|
<script>
|
|
|
|
if ( WEBGL.isWebGLAvailable() === false ) {
|
|
|
|
document.body.appendChild( WEBGL.getWebGLErrorMessage() );
|
|
|
|
}
|
|
|
|
var camera, scene, renderer, composer;
|
|
|
|
var effectSobel;
|
|
|
|
var params = {
|
|
enable: true
|
|
};
|
|
|
|
init();
|
|
animate();
|
|
|
|
function init() {
|
|
|
|
//
|
|
|
|
scene = new THREE.Scene();
|
|
|
|
camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 1000 );
|
|
camera.position.set( 0, 10, 25 );
|
|
camera.lookAt( scene.position );
|
|
|
|
//
|
|
|
|
var geometry = new THREE.TorusKnotBufferGeometry( 8, 3, 256, 32, 2, 3 );
|
|
var material = new THREE.MeshPhongMaterial( { color: 0xffff00 } );
|
|
|
|
var mesh = new THREE.Mesh( geometry, material );
|
|
scene.add( mesh );
|
|
|
|
//
|
|
|
|
var ambientLight = new THREE.AmbientLight( 0xcccccc, 0.4 );
|
|
scene.add( ambientLight );
|
|
|
|
var pointLight = new THREE.PointLight( 0xffffff, 0.8 );
|
|
camera.add( pointLight );
|
|
scene.add( camera );
|
|
|
|
//
|
|
|
|
renderer = new THREE.WebGLRenderer();
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
document.body.appendChild( renderer.domElement );
|
|
|
|
// postprocessing
|
|
|
|
composer = new THREE.EffectComposer( renderer );
|
|
var renderPass = new THREE.RenderPass( scene, camera );
|
|
composer.addPass( renderPass );
|
|
|
|
// color to grayscale conversion
|
|
|
|
var effectGrayScale = new THREE.ShaderPass( THREE.LuminosityShader );
|
|
composer.addPass( effectGrayScale );
|
|
|
|
// you might want to use a gaussian blur filter before
|
|
// the next pass to improve the result of the Sobel operator
|
|
|
|
// Sobel operator
|
|
|
|
effectSobel = new THREE.ShaderPass( THREE.SobelOperatorShader );
|
|
effectSobel.uniforms[ "resolution" ].value.x = window.innerWidth;
|
|
effectSobel.uniforms[ "resolution" ].value.y = window.innerHeight;
|
|
composer.addPass( effectSobel );
|
|
|
|
var controls = new THREE.OrbitControls( camera );
|
|
|
|
//
|
|
|
|
var gui = new dat.GUI();
|
|
|
|
gui.add( params, 'enable' );
|
|
gui.open();
|
|
|
|
//
|
|
|
|
window.addEventListener( 'resize', onWindowResize, false );
|
|
|
|
}
|
|
|
|
function onWindowResize() {
|
|
|
|
camera.aspect = window.innerWidth / window.innerHeight;
|
|
camera.updateProjectionMatrix();
|
|
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
composer.setSize( window.innerWidth, window.innerHeight );
|
|
|
|
effectSobel.uniforms[ "resolution" ].value.x = window.innerWidth;
|
|
effectSobel.uniforms[ "resolution" ].value.y = window.innerHeight;
|
|
|
|
}
|
|
|
|
function animate() {
|
|
|
|
requestAnimationFrame( animate );
|
|
|
|
if ( params.enable === true ) {
|
|
|
|
composer.render();
|
|
|
|
} else {
|
|
|
|
renderer.render( scene, camera );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
</script>
|
|
|
|
</body>
|
|
</html>
|