Created
November 17, 2014 23:22
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three.js float texture
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>test float texture</title> | |
| <meta charset="UTF-8"> | |
| <script src="//cdnjs.cloudflare.com/ajax/libs/three.js/r68/three.min.js"></script> | |
| </head> | |
| <body style="margin:0; overflow:hidden;"> | |
| <script> | |
| var renderer = new THREE.WebGLRenderer({ antialias:true, alpha:false }); | |
| renderer.setSize(window.innerWidth, window.innerHeight); | |
| renderer.setClearColor(0xccccff, 1); | |
| document.body.appendChild(renderer.domElement); | |
| var scene = new THREE.Scene(); | |
| var camera = new THREE.PerspectiveCamera(15, 1.0 * window.innerWidth / window.innerHeight); | |
| camera.position.z = 8; | |
| camera.lookAt(new THREE.Vector3(0, 0, 0)); | |
| // var texture = THREE.ImageUtils.loadTexture('images/earth_map_flat_2048_w.png'); | |
| // var texture = THREE.ImageUtils.generateDataTexture(32, 32, new THREE.Color(0xff0000)); | |
| var textureWidth = 2055; | |
| var textureHeight = 1027; | |
| var size = textureWidth * textureHeight; | |
| // var dataColor = new Uint8Array( size * 3 ); | |
| // for (var i = 0; i < size; i ++) { | |
| // dataColor[ i * 3 ] = 0; | |
| // dataColor[ i * 3 + 1 ] = 0; | |
| // dataColor[ i * 3 + 2 ] = i % 256; | |
| // } | |
| var dataColor = new Float32Array( size * 2 ); | |
| for (var i = 0; i < size; i ++) { | |
| dataColor[ i * 2 ] = 1.0; | |
| dataColor[ i * 2 + 1 ] = (i % 256) / 255.0; | |
| } | |
| var texture = new THREE.DataTexture(dataColor, textureWidth, textureHeight, THREE.LuminanceAlphaFormat, THREE.FloatType); | |
| texture.needsUpdate = true; | |
| var geometry = new THREE.PlaneGeometry(1, 1); | |
| var material = new THREE.MeshBasicMaterial({ | |
| map: texture, | |
| transparent: true | |
| }); | |
| var mesh = new THREE.Mesh(geometry, material); | |
| scene.add(mesh); | |
| function render() { | |
| requestAnimationFrame(render); | |
| renderer.render(scene, camera); | |
| }; | |
| render(); | |
| </script> | |
| </body> | |
| </html> |
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