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webgl_materials_blending.html
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<!doctype html>
<html lang="en">
<head>
<title>three.js webgl - materials - blending</title>
<meta charset="utf-8">
<style>
body {
margin: 0px;
background-color: #000000;
overflow: hidden;
}
</style>
</head>
<body>
<script src="../build/Three.js"></script>
<script src="js/Detector.js"></script>
<script>
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
var camera, scene, renderer;
var mesh;
init();
animate();
function init() {
// SCENE
scene = new THREE.Scene();
// CAMERA
camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 1000 );
camera.position.z = 600;
scene.add( camera );
// BACKGROUND
var x = document.createElement( "canvas" );
var xc = x.getContext( "2d" );
x.width = x.height = 128;
xc.fillStyle = "#ddd";
xc.fillRect( 0, 0, 128, 128 );
xc.fillStyle = "#555";
xc.fillRect( 0, 0, 64, 64 );
xc.fillStyle = "#999";
xc.fillRect( 32, 32, 32, 32 );
xc.fillStyle = "#555";
xc.fillRect( 64, 64, 64, 64 );
xc.fillStyle = "#777";
xc.fillRect( 96, 96, 32, 32 );
var mapBg = new THREE.Texture( x );
mapBg.wrapS = mapBg.wrapT = THREE.RepeatWrapping;
mapBg.repeat.set( 128, 64 );
mapBg.needsUpdate = true;
/*
var mapBg = THREE.ImageUtils.loadTexture( "textures/disturb.jpg" );
mapBg.wrapS = mapBg.wrapT = THREE.RepeatWrapping;
mapBg.repeat.set( 8, 4 );
*/
var materialBg = new THREE.MeshBasicMaterial( { map: mapBg } );
var meshBg = new THREE.Mesh( new THREE.PlaneGeometry( 4000, 2000 ), materialBg );
meshBg.position.set( 0, 0, -1 );
meshBg.rotation.x = Math.PI / 2;
scene.add( meshBg );
// OBJECTS
var blendings = [ "NoBlending", "NormalBlending", "AdditiveBlending", "SubtractiveBlending", "MultiplyBlending", "AdditiveAlphaBlending" ];
var map0 = THREE.ImageUtils.loadTexture( 'textures/ash_uvgrid01.jpg' );
var map1 = THREE.ImageUtils.loadTexture( 'textures/sprite0.jpg' );
var map2 = THREE.ImageUtils.loadTexture( 'textures/sprite0.png' );
var map3 = THREE.ImageUtils.loadTexture( 'textures/lensflare/lensflare0.png' );
var map4 = THREE.ImageUtils.loadTexture( 'textures/lensflare/lensflare0_alpha.png' );
var geo1 = new THREE.PlaneGeometry( 100, 100 );
var geo2 = new THREE.PlaneGeometry( 100, 25 );
addImageRow( map0, 300 );
addImageRow( map1, 150 );
addImageRow( map2, 0 );
addImageRow( map3, -150 );
addImageRow( map4, -300 );
function addImageRow( map, y ) {
for ( var i = 0; i < blendings.length; i ++ ) {
var blending = blendings[ i ];
var material = new THREE.MeshBasicMaterial( { map: map } );
material.transparent = true;
material.blending = THREE[ blending ];
var x = ( i - blendings.length / 2 ) * 110;
var z = 0;
var mesh = new THREE.Mesh( geo1, material );
mesh.position.set( x, y, z );
mesh.rotation.x = Math.PI / 2;
scene.add( mesh );
var mesh = new THREE.Mesh( geo2, generateLabelMaterial( blending.replace( "Blending", "" ) ) );
mesh.position.set( x, y - 75, z );
mesh.rotation.x = Math.PI / 2;
scene.add( mesh );
}
}
// RENDERER
renderer = new THREE.WebGLRenderer( { clearColor: 0x000000, clearAlpha: 1 } );
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
// EVENTS
window.addEventListener( 'resize', onWindowResize, false );
}
//
function onWindowResize( event ) {
var SCREEN_WIDTH = window.innerWidth;
var SCREEN_HEIGHT = window.innerHeight;
renderer.setSize( SCREEN_WIDTH, SCREEN_HEIGHT );
camera.aspect = SCREEN_WIDTH / SCREEN_HEIGHT;
camera.updateProjectionMatrix();
}
function generateLabelMaterial( text ) {
var x = document.createElement( "canvas" );
var xc = x.getContext( "2d" );
x.width = 128;
x.height = 32;
xc.fillStyle = "rgba( 0, 0, 0, 0.95 )";
xc.fillRect( 0, 0, 128, 32 );
xc.fillStyle = "white";
xc.font = "12pt arial bold";
xc.fillText( text, 10, 22 );
var map = new THREE.Texture( x );
map.needsUpdate = true;
var material = new THREE.MeshBasicMaterial( { map: map, transparent: true } );
return material;
}
function animate() {
requestAnimationFrame( animate );
renderer.render( scene, camera );
}
</script>
</body>
</html>