samien
/
three.js
-ын хуулбар https://github.com/mrdoob/three.js.git


			
				
					
						
						
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							<!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">
		<link type="text/css" rel="stylesheet" href="main.css">
	</head>
	<body>

		<div id="info">
			<a href="https://threejs.org" target="_blank" rel="noopener noreferrer">three.js</a> - webgl - postprocessing<br/>
			sobel (edge detection)
		</div>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.module.js",
					"three/addons/": "./jsm/"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three';

			import { GUI } from 'three/addons/libs/lil-gui.module.min.js';

			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';

			import { ShaderPass } from 'three/addons/postprocessing/ShaderPass.js';

			import { LuminosityShader } from 'three/addons/shaders/LuminosityShader.js';
			import { SobelOperatorShader } from 'three/addons/shaders/SobelOperatorShader.js';

			let camera, scene, renderer;

			let effectGrayScale, effectSobel;

			const params = {
				enable: true
			};

			init();

			function init() {

				//

				scene = new THREE.Scene();

				camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 0.1, 100 );
				camera.position.set( 0, 1, 3 );
				camera.lookAt( scene.position );

				//

				const geometry = new THREE.TorusKnotGeometry( 1, 0.3, 256, 32 );
				const material = new THREE.MeshPhongMaterial( { color: 0xffff00 } );

				const mesh = new THREE.Mesh( geometry, material );
				scene.add( mesh );

				//

				const ambientLight = new THREE.AmbientLight( 0xe7e7e7 );
				scene.add( ambientLight );

				const pointLight = new THREE.PointLight( 0xffffff, 20 );
				camera.add( pointLight );
				scene.add( camera );

				//

				renderer = new THREE.WebGLRenderer( { outputBufferType: THREE.HalfFloatType } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setAnimationLoop( animate );
				document.body.appendChild( renderer.domElement );

				// postprocessing

				// color to grayscale conversion

				effectGrayScale = new ShaderPass( LuminosityShader );

				// 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 ShaderPass( SobelOperatorShader );
				effectSobel.uniforms[ 'resolution' ].value.x = window.innerWidth * window.devicePixelRatio;
				effectSobel.uniforms[ 'resolution' ].value.y = window.innerHeight * window.devicePixelRatio;

				renderer.setEffects( [ effectGrayScale, effectSobel ] );

				const controls = new OrbitControls( camera, renderer.domElement );
				controls.enableZoom = false;

				//

				const gui = new GUI();

				gui.add( params, 'enable' ).onChange( ( value ) => {

					renderer.setEffects( value ? [ effectGrayScale, effectSobel ] : null );

				} );
				gui.open();

				//

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

				effectSobel.uniforms[ 'resolution' ].value.x = window.innerWidth * window.devicePixelRatio;
				effectSobel.uniforms[ 'resolution' ].value.y = window.innerHeight * window.devicePixelRatio;

			}

			function animate() {

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>