javascript
/
three.js
-ын хуулбар https://github.com/tazdij/three.js.git


			
				
					
						
						
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274
							<!DOCTYPE html>
<html lang="en">
<head>
	<title>three.js webgl - instancing test (single triangle)</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 {
			color: #ffffff;
			font-family: Monospace;
			font-size: 13px;
			text-align: center;
			font-weight: bold;
			background-color: #000000;
			margin: 0px;
			overflow: hidden;
		}

		#info {
			position: absolute;
			top: 0px;
			width: 100%;
			padding: 5px;
		}

		a {
			color: #ffffff;
		}

		#webglmessage a {
			color: #da0;
		}

		#notSupported {
			width: 50%;
			margin: auto;
			border: 2px red solid;
			margin-top: 20px;
			padding: 10px;
		}
	</style>
</head>
<body>

	<div id="container"></div>
	<div id="info">
		<a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - instancing demo (single triangle)
		<div id="notSupported" style="display:none">Sorry your graphics card + browser does not support hardware instancing</div>
	</div>

	<script src="js/libs/dat.gui.min.js"></script>
	<script src="../build/three.js"></script>
	<script src="js/libs/stats.min.js"></script>
	<script src="js/WebGL.js"></script>

	<script id="vertexShader" type="x-shader/x-vertex">
		precision highp float;

		uniform float sineTime;

		uniform mat4 modelViewMatrix;
		uniform mat4 projectionMatrix;

		attribute vec3 position;
		attribute vec3 offset;
		attribute vec4 color;
		attribute vec4 orientationStart;
		attribute vec4 orientationEnd;

		varying vec3 vPosition;
		varying vec4 vColor;

		void main(){

			vPosition = offset * max( abs( sineTime * 2.0 + 1.0 ), 0.5 ) + position;
			vec4 orientation = normalize( mix( orientationStart, orientationEnd, sineTime ) );
			vec3 vcV = cross( orientation.xyz, vPosition );
			vPosition = vcV * ( 2.0 * orientation.w ) + ( cross( orientation.xyz, vcV ) * 2.0 + vPosition );

			vColor = color;

			gl_Position = projectionMatrix * modelViewMatrix * vec4( vPosition, 1.0 );

		}

	</script>

	<script id="fragmentShader" type="x-shader/x-fragment">

		precision highp float;

		uniform float time;

		varying vec3 vPosition;
		varying vec4 vColor;

		void main() {

			vec4 color = vec4( vColor );
			color.r += sin( vPosition.x * 10.0 + time ) * 0.5;

			gl_FragColor = color;

		}

	</script>

	<script>

		if ( WEBGL.isWebGLAvailable() === false ) {

			document.body.appendChild( WEBGL.getWebGLErrorMessage() );

		}

		var container, stats;

		var camera, scene, renderer;

		init();
		animate();

		function init() {

			container = document.getElementById( 'container' );

			camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 10 );
			camera.position.z = 2;

			scene = new THREE.Scene();

			// geometry

			var vector = new THREE.Vector4();

			var instances = 50000;

			var positions = [];
			var offsets = [];
			var colors = [];
			var orientationsStart = [];
			var orientationsEnd = [];

			positions.push( 0.025, -0.025, 0 );
			positions.push( -0.025, 0.025, 0 );
			positions.push( 0, 0, 0.025 );

			// instanced attributes

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

				// offsets

				offsets.push( Math.random() - 0.5, Math.random() - 0.5, Math.random() - 0.5 );

				// colors

				colors.push( Math.random(), Math.random(), Math.random(), Math.random() );

				// orientation start

				vector.set( Math.random() * 2 - 1, Math.random() * 2 - 1, Math.random() * 2 - 1, Math.random() * 2 - 1 );
				vector.normalize();

				orientationsStart.push( vector.x, vector.y, vector.z, vector.w );

				// orientation end

				vector.set( Math.random() * 2 - 1, Math.random() * 2 - 1, Math.random() * 2 - 1, Math.random() * 2 - 1 );
				vector.normalize();

				orientationsEnd.push( vector.x, vector.y, vector.z, vector.w );

			}

			var geometry = new THREE.InstancedBufferGeometry();
			geometry.maxInstancedCount = instances; // set so its initalized for dat.GUI, will be set in first draw otherwise

			geometry.addAttribute( 'position', new THREE.Float32BufferAttribute( positions, 3 ) );

			geometry.addAttribute( 'offset', new THREE.InstancedBufferAttribute( new Float32Array( offsets ), 3 ) );
			geometry.addAttribute( 'color', new THREE.InstancedBufferAttribute( new Float32Array( colors ), 4 ) );
			geometry.addAttribute( 'orientationStart', new THREE.InstancedBufferAttribute( new Float32Array( orientationsStart ), 4 ) );
			geometry.addAttribute( 'orientationEnd', new THREE.InstancedBufferAttribute( new Float32Array( orientationsEnd ), 4 ) );

			// material

			var material = new THREE.RawShaderMaterial( {

				uniforms: {
					time: { value: 1.0 },
					sineTime: { value: 1.0 }
				},
				vertexShader: document.getElementById( 'vertexShader' ).textContent,
				fragmentShader: document.getElementById( 'fragmentShader' ).textContent,
				side: THREE.DoubleSide,
				transparent: true

			} );

			//

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

			//

			renderer = new THREE.WebGLRenderer();
			renderer.setPixelRatio( window.devicePixelRatio );
			renderer.setSize( window.innerWidth, window.innerHeight );
			container.appendChild( renderer.domElement );

			if ( renderer.extensions.get( 'ANGLE_instanced_arrays' ) === null ) {

				document.getElementById( 'notSupported' ).style.display = '';
				return;

			}

			//

			var gui = new dat.GUI( { width: 350 } );
			gui.add( geometry, 'maxInstancedCount', 0, instances );

			//

			stats = new Stats();
			container.appendChild( stats.dom );

			//

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

		}

		function onWindowResize( event ) {

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

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

		}

		//

		function animate() {

			requestAnimationFrame( animate );

			render();
			stats.update();

		}

		function render() {

			var time = performance.now();

			var object = scene.children[ 0 ];

			object.rotation.y = time * 0.0005;
			object.material.uniforms.time.value = time * 0.005;
			object.material.uniforms.sineTime.value = Math.sin( object.material.uniforms.time.value * 0.05 );

			renderer.render( scene, camera );

		}

	</script>

</body>

</html>