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


			
				
					
						
						
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							<!DOCTYPE HTML>
<html lang="en">
    <head>
        <title>three.js - render-to-texture - webgl</title>
        <meta charset="utf-8">
        <style type="text/css">
            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;
            }

        </style>
    </head>
    <body>

        <div id="container"></div>
        <div id="info"><a href="http://github.com/mrdoob/three.js" target="_blank">three.js</a> render-to-texture webgl example</div>

        <script type="text/javascript" src="js/Stats.js"></script>
        <script type="text/javascript" src="../build/ThreeExtras.js"></script>

        <script id="vertex_shader" type="x-shader/x-vertex">
            varying vec2 vUv;

            void main()
            {
               vUv = uv;
               gl_Position = vec4( position, 1.0 );
           }
        </script>

        <script id="fragment_shader_pass_1" type="x-shader/x-fragment">
			varying vec2 vUv;
			uniform float time;
			
            void main(void)
            {
                //gl_FragColor = vec4( time, vUv.x, vUv.y, 1.0 );
				float r = vUv.x;
				if( vUv.y < 0.5 ) r = 0.0;
				float g = vUv.y;
				if( vUv.x < 0.5 ) g = 0.0;
				
				gl_FragColor = vec4( r, g, 0.25, 1.0 );
            }
        </script>

        <script type="text/javascript">

            var container, stats;

            var cameraRTT, camera, sceneRTT, scene, renderer;

			var mouseX = 0, mouseY = 0;
			
			var windowHalfX = window.innerWidth / 2;
			var windowHalfY = window.innerHeight / 2;
			
            var rtTexture, material, quad;

            init();
            setInterval( loop, 1000 / 60 );

            function init() {

                container = document.getElementById( 'container' );

                cameraRTT = new THREE.Camera();
                cameraRTT.position.z = 100;

				camera = new THREE.Camera( 30, window.innerWidth / window.innerHeight, 1, 10000 );
				camera.position.z = 100;
				camera.updateMatrix();

                sceneRTT = new THREE.Scene();
				scene = new THREE.Scene();

				var light = new THREE.DirectionalLight( 0xffffff );
				light.position.x = 0;
				light.position.y = 0;
				light.position.z = 1;
				light.position.normalize();
				scene.addLight( light );

				light = new THREE.DirectionalLight( 0xffaaaa, 0.5 );
				light.position.x = -1;
				light.position.y = 0;
				light.position.z = -1;
				light.position.normalize();
				scene.addLight( light );

                rtTexture = new THREE.RenderTarget( 256, 256 );

                material = new THREE.MeshShaderMaterial( {

                    uniforms: { time: { type: "f", value: 0.0 } },
                    vertex_shader: document.getElementById( 'vertex_shader' ).textContent,
                    fragment_shader: document.getElementById( 'fragment_shader_pass_1' ).textContent

                } );

                quad = new THREE.Mesh( new Plane( 2, 2 ), material );
                sceneRTT.addObject( quad );
				
				var n = 5,
					geometry = new Sphere( 10, 64, 32 ),
					material2 = new THREE.MeshLambertMaterial( { color:0xffffff, map: rtTexture } );
					//material2 = new THREE.MeshBasicMaterial( { color:0xffffff, map: rtTexture } );
				
				for( var j = 0; j < n; j++ ) {
					for( var i = 0; i < n; i++ ) {
					
						mesh = new THREE.Mesh( geometry, material2 );
						mesh.position.x = ( i - (n-1)/2 ) * 20;
						mesh.position.y = ( j - (n-1)/2 ) * 20;
						scene.addObject( mesh );
						
					}
				}

                renderer = new THREE.WebGLRenderer();
				renderer.setSize( window.innerWidth, window.innerHeight );
                container.appendChild( renderer.domElement );
				
                stats = new Stats();
                stats.domElement.style.position = 'absolute';
                stats.domElement.style.top = '0px';
                container.appendChild( stats.domElement );
				
				document.addEventListener( 'mousemove', onDocumentMouseMove, false );

            }

			function onDocumentMouseMove( event ) {

				mouseX = ( event.clientX - windowHalfX );
				mouseY = ( event.clientY - windowHalfY );

			}

			var delta = 0.01;
			
            function loop() {

				camera.position.x += ( mouseX - camera.position.x ) * .05;
				camera.position.y += ( - mouseY - camera.position.y ) * .05;

                // Render to texture
				
				if ( material.uniforms.time.value > 1 || material.uniforms.time.value < 0 ) {
				
					delta *= -1;
					
				}
					
				material.uniforms.time.value += delta;
					
                renderer.render( sceneRTT, cameraRTT, rtTexture );
				//renderer.render( sceneRTT, cameraRTT );

                // Render to screen
				
                renderer.render( scene, camera );

                stats.update();

            }

        </script>

    </body>
</html>