javascript
/
three.js
mirror da https://github.com/tazdij/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - modifier - Edge Split modifier</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>

		<script type="module">

			import * as THREE from '../build/three.module.js';

			import { OrbitControls } from './jsm/controls/OrbitControls.js';
			import { OBJLoader } from "./jsm/loaders/OBJLoader.js";
			import { BufferGeometryUtils } from "./jsm/utils/BufferGeometryUtils.js";
			import { EdgeSplitModifier } from "./jsm/modifiers/EdgeSplitModifier.js";

			import { GUI } from "./jsm/libs/dat.gui.module.js";

			let renderer, scene, camera;
			let modifier, mesh, baseGeometry;

			const params = {
				smoothShading: true,
				edgeSplit: true,
				cutOffAngle: 20,
			};

			init();

			function init() {

				const info = document.createElement( 'div' );
				info.style.position = 'absolute';
				info.style.top = '10px';
				info.style.width = '100%';
				info.style.textAlign = 'center';
				info.innerHTML = '<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - Edge Split modifier';
				document.body.appendChild( info );

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				document.body.appendChild( renderer.domElement );

				scene = new THREE.Scene();

				camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight );

				const controls = new OrbitControls( camera, renderer.domElement );
				controls.addEventListener( 'change', render ); // use if there is no animation loop
				controls.enableDamping = true;
				controls.dampingFactor = 0.25;
				controls.rotateSpeed = 0.35;
				controls.minZoom = 1;
				camera.position.set( 0, 0, 4 );

				scene.add( new THREE.HemisphereLight( 0xffffff, 0x444444 ) );

				new OBJLoader().load(
					'./models/obj/cerberus/Cerberus.obj',
					function ( group ) {

						// Retrieve Cerberus vertex positions only
						const modelGeometry = group.children[ 0 ].geometry;
						modelGeometry.deleteAttribute( 'normal' );
						modelGeometry.deleteAttribute( 'uv' );

						modifier = new EdgeSplitModifier();
						baseGeometry = modelGeometry;

						mesh = new THREE.Mesh( getGeometry(), new THREE.MeshStandardMaterial() );
						mesh.material.flatShading = ! params.smoothShading;
						mesh.rotateY( - Math.PI / 2 );
						mesh.scale.set( 3.5, 3.5, 3.5 );
						mesh.translateZ( 1.5 );
						scene.add( mesh );

						render();

					}
				);

				window.addEventListener( 'resize', onWindowResize, false );


				const gui = new GUI( { name: "Edge split modifier parameters" } );

				gui.add( params, "smoothShading" ).onFinishChange( updateMesh );
				gui.add( params, "edgeSplit" ).onFinishChange( updateMesh );
				gui.add( params, "cutOffAngle" ).min( 0 ).max( 180 ).onFinishChange( updateMesh );

			}

			function onWindowResize() {

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

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

				render();

			}


			function getGeometry() {

				let geometry;

				if ( params.edgeSplit ) {

					geometry = modifier.modify( baseGeometry, params.cutOffAngle * Math.PI / 180 );

				} else {

					geometry = BufferGeometryUtils.mergeVertices( baseGeometry );

				}

				geometry.computeVertexNormals();

				return geometry;

			}


			function updateMesh() {

				mesh.geometry = getGeometry();

				mesh.material.flatShading = params.smoothShading === false;
				mesh.material.needsUpdate = true;

				render();

			}


			function render() {

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>