javascript
/
three.js
tükrözi: https://github.com/tazdij/three.js.git


			
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							<!doctype html>
<html lang="en">
	<head>
		<title>three.js webgl - postprocessing - godrays</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 {
				background-color: #000000;
				margin: 0px;
				overflow: hidden;
				font-family:Monospace;
				font-size:13px;
				text-align:center;
				font-weight: bold;
				text-align:center;
			}

			a {
				color:#0078ff;
			}

			#info {
				color:#fff;
				position: absolute;
				top: 0px; width: 100%;
				padding: 5px;
				z-index:100;
			}
		</style>
	</head>

	<body>
		<script src="../build/Three.js"></script>

		<script src="js/Detector.js"></script>
		<script src="js/ShaderGodRays.js"></script>
		<script src="js/Stats.js"></script>

		<script src='js/DAT.GUI.min.js'></script>

		<div id="info">
			<a href="http://github.com/mrdoob/three.js" target="_blank">three.js</a> - webgl god-rays example - tree from turbosquid</a>
		</div>


		<script>

			if ( ! Detector.webgl ) Detector.addGetWebGLMessage();

			var container, stats;
			var camera, scene, renderer,
				materials = [], objects = [],
				singleMaterial, zmaterial = [],
				parameters, i, j, k, h, color, x, y, z, s, n, nobjects,
				material_depth, cubeMaterial;
            var tree_mesh, sphere_mesh;
            
    		var proj = new THREE.Projector();
            var sunPos = new THREE.Vector3(0,1000,-1000);
            
			var mouseX = 0, mouseY = 0;
            
			var windowHalfX = window.innerWidth / 2;
			var windowHalfY = window.innerHeight / 2;

			var height = window.innerHeight-100;

			var postprocessing = { enabled  : true };

			init();
			animate();

			function init() {

				container = document.createElement( 'div' );
				document.body.appendChild( container );

				scene = new THREE.Scene();

				camera = new THREE.PerspectiveCamera( 70, window.innerWidth / height, 1, 3000 );
				camera.position.z = 200;
				scene.add( camera );

				renderer = new THREE.WebGLRenderer( { antialias: false } );
				renderer.setSize( window.innerWidth, height );
				container.appendChild( renderer.domElement );

				renderer.sortObjects = false;


                // todo - try with fog?
				//scene.fog = new THREE.Fog( 0xffaa55, 1000, FAR );
				//THREE.ColorUtils.adjustHSV( scene.fog.color, 0.02, -0.15, -0.65 );
                
				material_depth = new THREE.MeshDepthMaterial();

				var path = "textures/cube/SwedishRoyalCastle/";
				var format = '.jpg';
				var urls = [
						path + 'px' + format, path + 'nx' + format,
						path + 'py' + format, path + 'ny' + format,
						path + 'pz' + format, path + 'nz' + format
					];

				var textureCube = THREE.ImageUtils.loadTextureCube( urls );

                // was 0x003300
                // then 0x050500
				parameters = { color: 0x000000, /*envMap: textureCube,*/ shading: THREE.FlatShading };
				cubeMaterial = new THREE.MeshBasicMaterial( parameters );

				singleMaterial = false;

				if( singleMaterial ) zmaterial = [ cubeMaterial ];

				var start = new Date().getTime();

				renderer.initMaterial( cubeMaterial, scene.__lights, scene.fog );

				var xgrid = 1, //14,
					ygrid = 1, //9,
					zgrid = 1; //14;

				nobjects = xgrid * ygrid * zgrid;

				c = 0;

                var zmat = new THREE.MeshBasicMaterial( parameters );
				//renderer.initMaterial( materials[ c ], scene.__lights, scene.fog, mesh );
        		
        		// tree mesh	
                var jsonLoader = new THREE.JSONLoader();
                jsonLoader.load( "obj/tree/tree.js",
                    function( geometry ) {
                        var m = new THREE.Mesh( geometry, zmat );
				        m.position.set( 0, -150, -150 );
				        var sc = 400;
				        m.scale.set( sc, sc, sc );
				        m.matrixAutoUpdate = false;
				        m.updateMatrix();
				        scene.add( m );
				        objects.push( m );
				        tree_mesh = m;
                    }
                    );
                /*
        		// cog mesh	
                var jsonLoader = new THREE.JSONLoader();
                jsonLoader.load( "obj/cog/cog1.js",
                    function( geometry ) {
                        var m = new THREE.Mesh( geometry, zmat );
				        m.position.set( -150, -150, -150 );
				        var sc = 400;
				        m.scale.set( sc, sc, sc );
				        m.matrixAutoUpdate = false;
				        m.updateMatrix();
				        scene.add( m );
				        objects.push( m );
				        //tree_mesh = m;
                    }
                    );
                */

				var geo = new THREE.SphereGeometry( 1, 20, 10 );
				mesh = new THREE.Mesh( geo, zmat );

                var sc = 20;
				mesh.scale.set( sc, sc, sc );

				mesh.matrixAutoUpdate = false;
				mesh.updateMatrix();

				scene.add( mesh );
				objects.push( mesh );
				sphere_mesh = mesh;
				
				scene.matrixAutoUpdate = false;

				initPostprocessing();

				renderer.autoClear = false;
                renderer.setClearColorHex( 0x000033, 1);

				renderer.domElement.style.position = 'absolute';
				renderer.domElement.style.top = "50px";
				renderer.domElement.style.left = "0px";

				stats = new Stats();
				stats.domElement.style.position = 'absolute';
				stats.domElement.style.top = '0px';
				container.appendChild( stats.domElement );

				document.addEventListener( 'mousemove', onDocumentMouseMove, false );
				document.addEventListener( 'touchstart', onDocumentTouchStart, false );
				document.addEventListener( 'touchmove', onDocumentTouchMove, false );

                /*
				var effectController  = {
                    
                    intensity:  0.69,
                    patchSize: 0.3,
				};

				var matChanger = function( ) {

					postprocessing.godray_combine_uniforms[ "fGodRayIntensity" ].value = effectController.intensity;
					patchSize = effectController.patchSize;
				};

				var gui = new DAT.GUI();
				gui.add( effectController, "intensity", 0.0, 1.0, 0.001 ).onChange( matChanger );
				gui.add( effectController, "patchSize", 0.0, 1.0, 0.001 ).onChange( matChanger );
				gui.close();
				*/

			}

			function onDocumentMouseMove( event ) {

				mouseX = event.clientX - windowHalfX;
				mouseY = event.clientY - windowHalfY;
			}

			function onDocumentTouchStart( event ) {

				if ( event.touches.length == 1 ) {

					event.preventDefault();

					mouseX = event.touches[ 0 ].pageX - windowHalfX;
					mouseY = event.touches[ 0 ].pageY - windowHalfY;
				}
			}

			function onDocumentTouchMove( event ) {

				if ( event.touches.length == 1 ) {

					event.preventDefault();

					mouseX = event.touches[ 0 ].pageX - windowHalfX;
					mouseY = event.touches[ 0 ].pageY - windowHalfY;
				}
			}

			function initPostprocessing() {

				postprocessing.scene = new THREE.Scene();

				postprocessing.camera = new THREE.OrthographicCamera( window.innerWidth / - 2, window.innerWidth / 2,  window.innerHeight / 2, window.innerHeight / - 2, -10000, 10000 );
				postprocessing.camera.position.z = 100;

				postprocessing.scene.add( postprocessing.camera );

				var pars = { minFilter: THREE.LinearFilter, magFilter: THREE.LinearFilter, format: THREE.RGBFormat };
				postprocessing.rtTextureColors = new THREE.WebGLRenderTarget( window.innerWidth, height, pars );
				
				// Switching the depth formats to luminance from rgb doesn't seem to work. I didn't
				// investigate further for now.
				//pars.format = THREE.LuminanceFormat;
				
				// I would have this quarter size and use it as one of the ping-pong render
				// targets but the aliasing causes some temporal flickering
				postprocessing.rtTextureDepth = new THREE.WebGLRenderTarget( window.innerWidth, height, pars );
				
				// Aggressive downsizing to minimize cost of postprocessing passes. God rays
				// are low frequency so aliasing is less noticeable.
				var w = window.innerWidth / 4.0;
				var h = height / 4.0;
				postprocessing.rtTextureGodRays1 = new THREE.WebGLRenderTarget( w, h, pars );
				postprocessing.rtTextureGodRays2 = new THREE.WebGLRenderTarget( w, h, pars );
				
                // GOD RAY POST PROC

				var godray_gen_shader = THREE.ShaderGodRays[ "godrays_generate" ];
				postprocessing.godray_gen_uniforms = THREE.UniformsUtils.clone( godray_gen_shader.uniforms );
				postprocessing.materialGodraysGenerate = new THREE.ShaderMaterial( {
					uniforms: postprocessing.godray_gen_uniforms,
					vertexShader: godray_gen_shader.vertexShader,
					fragmentShader: godray_gen_shader.fragmentShader
				} );
                
                var godrays_combine_shader = THREE.ShaderGodRays[ "godrays_combine" ];
				postprocessing.godray_combine_uniforms = THREE.UniformsUtils.clone( godrays_combine_shader.uniforms );
				postprocessing.materialGodraysCombine = new THREE.ShaderMaterial( {
					uniforms: postprocessing.godray_combine_uniforms,
					vertexShader: godrays_combine_shader.vertexShader,
					fragmentShader: godrays_combine_shader.fragmentShader
				} );
                
                var godrays_fake_sun_shader = THREE.ShaderGodRays[ "godrays_fake_sun" ];
				postprocessing.godrays_fake_sun_uniforms = THREE.UniformsUtils.clone( godrays_fake_sun_shader.uniforms );
				postprocessing.materialGodraysFakeSun = new THREE.ShaderMaterial( {
					uniforms: postprocessing.godrays_fake_sun_uniforms,
					vertexShader: godrays_fake_sun_shader.vertexShader,
					fragmentShader: godrays_fake_sun_shader.fragmentShader
				} );
				
				postprocessing.quad = new THREE.Mesh( new THREE.PlaneGeometry( window.innerWidth, window.innerHeight ), postprocessing.materialGodraysGenerate );
				postprocessing.quad.position.z = -9900;
				postprocessing.scene.add( postprocessing.quad );
			}

			function animate() {

				requestAnimationFrame( animate, renderer.domElement );
				
                if( sphere_mesh ) {
                    var radius = 100;
                    sphere_mesh.position.x = 200*Math.cos(Date.now()/4000);
                    sphere_mesh.position.z = 200*Math.sin(Date.now()/4000)-100;
                    sphere_mesh.updateMatrix();
                }
                
				render();
				stats.update();

			}

			function render() {

				var time = Date.now() * 0.00005;

				camera.position.x += ( mouseX - camera.position.x ) * 0.036;
				camera.position.y += ( - (mouseY) - camera.position.y ) * 0.036;

				camera.lookAt( scene.position );
				
				if (  postprocessing.enabled ) {

		            var sspos = new THREE.Vector3( sunPos.x, sunPos.y, sunPos.z); //new THREE.Vector3();
		            //var sspos = new THREE.Vector3( sphere_mesh.position.x, sphere_mesh.position.y, sphere_mesh.position.z); //new THREE.Vector3();
    				proj.projectVector(sspos,camera);
    				sspos.x = (sspos.x+1)/2;
    				sspos.y = (sspos.y+1)/2;
					postprocessing.godray_gen_uniforms[ "vSunPositionScreenSpace" ].value = 
					    new THREE.Vector2(sspos.x,sspos.y);
					postprocessing.godrays_fake_sun_uniforms[ "vSunPositionScreenSpace" ].value = 
					    new THREE.Vector2(sspos.x,sspos.y);
					
					// Draw sun and sky ----------------------------------
					
					// Clear colors and depths, will clear to sky color
					renderer.clearTarget(postprocessing.rtTextureColors,true,true,false);
					
					// My poor excuse for rendering a sun. Runs a shader that gives
					// a brightness based on the screen space distance to the sun. Not very
					// efficient, so i make a scissor rect around the suns position to
					// avoid rendering surrounding pixels
					var sunsqH = 0.74 * height; // .74 depends on extent of sun from shader
					var sunsqW = 0.74 * height; // both dep on height because sun is aspect-corrected
					sspos.x *= window.innerWidth;
					sspos.y *= height;
					renderer.setScissor( sspos.x-sunsqW/2,sspos.y-sunsqH/2,sunsqW,sunsqH );
					renderer.enableScissorTest ( true );
					
					postprocessing.godrays_fake_sun_uniforms[ "fAspect" ].value = window.innerWidth / height;
					    
					postprocessing.scene.overrideMaterial = postprocessing.materialGodraysFakeSun;
					renderer.render( postprocessing.scene, postprocessing.camera, postprocessing.rtTextureColors );
					
					renderer.enableScissorTest ( false );
					
					// draw scene objects (e.g. tree)
					scene.overrideMaterial = null;
					renderer.render( scene, camera, postprocessing.rtTextureColors );
					
					// Render scene objects depth into texture
					scene.overrideMaterial = material_depth;
					renderer.render( scene, camera, postprocessing.rtTextureDepth, true );
                    
                    
					// Render godray composite
                    
    				var filterLen = 1.0;
    				var TAPS_PER_PASS = 6.0;
    				
    				// pass order could equivalently be 3,2,1 (instead of 1,2,3), which
    				// would start with a small filter support and grow to large. however
    				// the large-to-small order produces less objectionable aliasing artifacts that
    				// appear as a glimmer along the length of the beams
    				
                    // pass 1 - render into first ping-pong target
    				var pass = 1.0;
    				var stepLen = filterLen*Math.pow(TAPS_PER_PASS, -pass);
    				postprocessing.godray_gen_uniforms[ "fStepSize" ].value = stepLen;
    				postprocessing.godray_gen_uniforms[ "tInput" ].texture = postprocessing.rtTextureDepth;
					postprocessing.scene.overrideMaterial = postprocessing.materialGodraysGenerate;

                    var onepass = 0;
                    
    				if( onepass ) {
					    renderer.render( postprocessing.scene, postprocessing.camera );
    				} else {
					    renderer.render( postprocessing.scene, postprocessing.camera, postprocessing.rtTextureGodRays2 );
    					
					    // pass 2 - render into second ping-pong target
        				pass = 2.0;
        				stepLen = filterLen*Math.pow(TAPS_PER_PASS, -pass);
    				    postprocessing.godray_gen_uniforms[ "fStepSize" ].value = stepLen;
    				    postprocessing.godray_gen_uniforms[ "tInput" ].texture = postprocessing.rtTextureGodRays2;
				        renderer.render( postprocessing.scene, postprocessing.camera , postprocessing.rtTextureGodRays1  );
					    
				        // pass 3 - RT
				        pass = 3.0;
    				    stepLen = filterLen*Math.pow(TAPS_PER_PASS, -pass);
				        postprocessing.godray_gen_uniforms[ "fStepSize" ].value = stepLen;
				        postprocessing.godray_gen_uniforms[ "tInput" ].texture = postprocessing.rtTextureGodRays1;
				        renderer.render( postprocessing.scene, postprocessing.camera , postprocessing.rtTextureGodRays2  );
				        
				        postprocessing.godray_combine_uniforms["tColors"].texture = postprocessing.rtTextureColors;
				        postprocessing.godray_combine_uniforms["tGodRays"].texture = postprocessing.rtTextureGodRays2;
    					postprocessing.scene.overrideMaterial = postprocessing.materialGodraysCombine;
   				        renderer.render( postprocessing.scene, postprocessing.camera );
	    				postprocessing.scene.overrideMaterial = null;
				        
				    }

				} else {

					renderer.clear();
					renderer.render( scene, camera );

				}

			}


		</script>
	</body>
</html>