samien
/
three.js
oglindă de https://github.com/mrdoob/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
<head>
	<title>three.js webgl - instancing - morph targets - raycast </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="container"></div>
<div id="info">
	<a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - WebGL instancing morphTarget raycast
	example
</div>

<script type="module">

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

	import Stats from './jsm/libs/stats.module.js';
	import {OrbitControls} from './jsm/controls/OrbitControls.js';

	var container;

	var camera, scene, renderer, raycaster, controls, stats;

	var mesh, mouse = new THREE.Vector2();

	var object = new THREE.Object3D();

	var amount = parseInt( window.location.search.substr( 1 ) ) || 10;

	var count = Math.pow( amount, 3 );

	var rotationTheta = 0.1;
	var rotationMatrix = new THREE.Matrix4().makeRotationY( rotationTheta );
	var instanceMatrix = new THREE.Matrix4();
	var matrix = new THREE.Matrix4();

	init();
	animate();

	function init() {

		container = document.getElementById( 'container' );

		scene = new THREE.Scene();
		scene.background = new THREE.Color( 0x000000 );

		camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 2000 );
		camera.position.set( 25, 25, 25 );
		camera.lookAt( new THREE.Vector3( 0, 0, 0 ) );
		scene.add( camera );

		var light = new THREE.AmbientLight( 0xffffff );
		scene.add( light );

		var geometry = new THREE.BoxGeometry( 0.5, 0.5, 0.5 );
		var material = new THREE.MeshNormalMaterial( { morphTargets: true } );

		// construct 8 blend shapes

		for ( var i = 0; i < 8; i ++ ) {

			var vertices = [];

			for ( var v = 0; v < geometry.vertices.length; v ++ ) {

				vertices.push( geometry.vertices[ v ].clone() );

				if ( v === i ) {

					vertices[ vertices.length - 1 ].x *= 2;
					vertices[ vertices.length - 1 ].y *= 2;
					vertices[ vertices.length - 1 ].z *= 2;

				}

			}

			geometry.morphTargets.push( { name: "target" + i, vertices: vertices } );

		}

		geometry = new THREE.BufferGeometry().fromGeometry( geometry );

		mesh = new THREE.InstancedMesh( geometry, material, count );

		mesh.position.set( 0, 0, 0 );

		var i = 0;
		var offset = amount / 2;

		for ( var x = 0; x < amount; x ++ ) {

			for ( var y = 0; y < amount; y ++ ) {

				for ( var z = 0; z < amount; z ++ ) {

					object.position.set( ( offset - x ) * 2, ( offset - y ) * 2, ( offset - z ) * 2 );

					object.updateMatrix();

					mesh.setMatrixAt( i ++, object.matrix );

				}

			}

		}

		scene.add( mesh );

		raycaster = new THREE.Raycaster();

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

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

		stats = new Stats();
		document.body.appendChild( stats.dom );

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

		document.addEventListener( 'mousemove', onMouseMove, false );

	}

	function onMouseMove( event ) {

		event.preventDefault();

		mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
		mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;

	}

	function onWindowResize() {

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

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

	}

	function animate() {

		requestAnimationFrame( animate );
		render();

	}

	function updateMorphTargetInfluences() {

		for ( var i = 0; i < mesh.morphTargetInfluences.length; i ++ ) {

			mesh.morphTargetInfluences[ i ] = Math.sin( Date.now() * 0.001 ) + 0.5;

		}

	}

	function render() {

		updateMorphTargetInfluences();

		raycaster.setFromCamera( mouse, camera );

		var intersects = raycaster.intersectObject( mesh );

		if ( intersects.length > 0 ) {

			mesh.getMatrixAt( intersects[ 0 ].instanceId, instanceMatrix );
			matrix.multiplyMatrices( instanceMatrix, rotationMatrix );

			mesh.setMatrixAt( intersects[ 0 ].instanceId, matrix );
			mesh.instanceMatrix.needsUpdate = true;

		}

		renderer.render( scene, camera );

		stats.update();

	}


</script>

</body>
</html>