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@@ -31,142 +31,75 @@
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</head>
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<body>
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- <div id="container"></div>
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<div id="info">
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- <a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - webgl HDR texture loader example -
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- based on <a href="http://spidergl.org/example.php?id=13" target="_blank" rel="noopener">SpiderGL</a>
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+ <a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - webgl HDR (RGBE) texture loader example
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</div>
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<script src="../build/three.js"></script>
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<script src="js/loaders/RGBELoader.js"></script>
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- <script src="js/Detector.js"></script>
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- <script src="js/libs/stats.min.js"></script>
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-
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- <!-- HDR fragment shader -->
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-
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- <script id="fs-hdr" type="x-shader/x-fragment">
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-
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- uniform sampler2D tDiffuse;
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- uniform float exposure;
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- uniform float brightMax;
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-
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- varying vec2 vUv;
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-
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- vec3 decode_pnghdr( const in vec4 color ) {
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-
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- vec4 rgbcolor = vec4( 0.0, 0.0, 0.0, 0.0 );
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-
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- if ( color.w > 0.0 ) {
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- float f = pow(2.0, 127.0*(color.w-0.5));
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- rgbcolor.xyz = color.xyz * f;
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- }
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- return rgbcolor.xyz;
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+ <script src="js/libs/dat.gui.min.js"></script>
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- /*
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- // remove gamma correction
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- vec4 res = color * color;
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-
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- // decoded RI
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- float ri = pow( 2.0, res.w * 32.0 - 16.0 );
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-
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- // decoded HDR pixel
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- res.xyz = res.xyz * ri;
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- return res.xyz;
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- */
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- }
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-
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- void main() {
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-
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- vec4 color = texture2D( tDiffuse, vUv );
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- color.xyz = decode_pnghdr( color );
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-
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- // apply gamma correction and exposure
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- //gl_FragColor = vec4( pow( exposure * color.xyz, vec3( 0.474 ) ), 1.0 );
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+ <script src="js/Detector.js"></script>
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- // Perform tone-mapping
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- float Y = dot(vec4(0.30, 0.59, 0.11, 0.0), color);
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- float YD = exposure * (exposure/brightMax + 1.0) / (exposure + 1.0);
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- color *= YD;
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+ <script>
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- gl_FragColor = vec4( color.xyz, 1.0 );
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+ if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
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- }
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+ var params = {
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+ exposure: 1.0
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+ };
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- </script>
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+ var renderer, scene, camera;
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- <!-- HDR vertex shader -->
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+ init();
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- <script id="vs-hdr" type="x-shader/x-vertex">
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+ function init() {
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- varying vec2 vUv;
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+ renderer = new THREE.WebGLRenderer();
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+ renderer.setPixelRatio( window.devicePixelRatio );
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+ renderer.setSize( window.innerWidth, window.innerHeight );
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+ document.body.appendChild( renderer.domElement );
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- void main() {
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+ renderer.toneMapping = THREE.ReinhardToneMapping;
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+ renderer.toneMappingExposure = params.exposure;
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- vUv = uv;
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- gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
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+ renderer.gammaOutput = true;
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- }
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+ scene = new THREE.Scene();
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- </script>
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+ var aspect = window.innerWidth / window.innerHeight;
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+ camera = new THREE.OrthographicCamera( - aspect, aspect, 1, - 1, 0, 1 );
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- <script>
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+ new THREE.RGBELoader().load( 'textures/miranda_uncropped.hdr', function( texture, textureData ) {
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- if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
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+ //console.log( textureData );
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+ //console.log( texture );
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- var container, stats;
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+ texture.encoding = THREE.RGBEEncoding;
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+ texture.minFilter = THREE.NearestFilter;
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+ texture.magFilter = THREE.NearestFilter;
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+ texture.flipY = true;
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- var camera, scene, renderer;
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- var materialHDR, quad, gamma, exposure;
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+ var material = new THREE.MeshBasicMaterial( { map: texture } );
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- var sign = 1, rate = 1;
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+ var quad = new THREE.PlaneBufferGeometry( textureData.width / textureData.height, 1 );
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- var clock = new THREE.Clock();
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+ var mesh = new THREE.Mesh( quad, material );
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- init();
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+ scene.add( mesh );
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- function init() {
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+ render();
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- container = document.getElementById( 'container' );
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-
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- camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 10000 );
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- camera.position.z = 900;
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-
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- scene = new THREE.Scene();
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-
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- var loader = new THREE.RGBELoader();
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-
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- var texture = loader.load( "textures/miranda_uncropped.hdr", function( texture, textureData ){
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- console.log( textureData.header ); // header string
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- console.log( [textureData.width, textureData.height] ); // dimensions
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- materialHDR = new THREE.ShaderMaterial( {
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-
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- uniforms: {
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- tDiffuse: { value: texture },
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- exposure: { value: textureData.exposure },
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- brightMax: { value: textureData.gamma }
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- },
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- vertexShader: getText( 'vs-hdr' ),
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- fragmentShader: getText( 'fs-hdr' )
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-
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- } );
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- quad = new THREE.Mesh( new THREE.PlaneBufferGeometry( textureData.width, textureData.height ), materialHDR );
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- quad.position.z = -100;
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- scene.add( quad );
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- animate();
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} );
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- texture.minFilter = THREE.LinearFilter;
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- texture.magFilter = THREE.NearestFilter;
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+ //
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- renderer = new THREE.WebGLRenderer();
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- renderer.setPixelRatio( window.devicePixelRatio );
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- renderer.setSize( window.innerWidth, window.innerHeight );
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- container.appendChild( renderer.domElement );
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+ var gui = new dat.GUI();
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- stats = new Stats();
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- container.appendChild( stats.dom );
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+ gui.add( params, 'exposure', 0, 2 ).onChange( render );
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+ gui.open();
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//
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@@ -174,55 +107,28 @@
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}
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+ function onWindowResize() {
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+ var aspect = window.innerWidth / window.innerHeight;
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- function onWindowResize() {
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+ var frustumHeight = camera.top - camera.bottom;
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+
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+ camera.left = - frustumHeight * aspect / 2;
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+ camera.right = frustumHeight * aspect / 2;
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- camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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- }
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-
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- function getText( id ) {
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-
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- return document.getElementById( id ).textContent;
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+ render();
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}
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//
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- function animate() {
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-
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- requestAnimationFrame( animate );
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-
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- render();
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- stats.update();
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-
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- }
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-
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function render() {
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- var delta = clock.getDelta() * 5;
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-
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- if ( materialHDR.uniforms.exposure.value > 0 || materialHDR.uniforms.exposure.value < 1 ) {
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-
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- rate = 0.25;
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-
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- } else {
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-
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- rate = 1;
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-
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- }
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-
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- if ( materialHDR.uniforms.exposure.value > 5 || materialHDR.uniforms.exposure.value <= 0 ) {
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-
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- sign *= -1;
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-
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- }
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-
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- materialHDR.uniforms.exposure.value += sign * rate * delta;
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+ renderer.toneMappingExposure = params.exposure;
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renderer.render( scene, camera );
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WestLangley