<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - materials - custom blending</title>
<meta charset="utf-8">
<style>
body {
margin: 0px;
background-color: #111;
overflow: hidden;
font-family: arial;
}
.menu { color: #fff; font-weight: bold; font-size: 12px; z-index: 100; width: 75px; position: absolute; top: 0px; padding: 16px; }
.menu img, .menu canvas { width: 75px; margin: 10px 0 }
#images { background: rgba(0,0,0,0); left: 0px; }
#backgrounds { background: rgba(0,0,0,0.0); left: 107px; }
#labels { background: rgba(0,0,0,0.75); left: 214px; width: 100px }
.lbl { color: #fff; z-index: 150; float:left; padding: 0.25em; width: 75px; display: block }
#lbl_dst { background:#800; }
#lbl_src { background:green; }
.btn { background: darkorange; width: 100px; cursor: pointer }
#btn_sub { background: transparent }
#btn_rsub { background: transparent }
#btn_pre { background: transparent }
#btn_rsub, #btn_nopre { margin-bottom: 2em }
</style>
</head>
<body>
<div id="images" class="menu">
Foreground
<a id="img_0" href="#"><img src="textures/disturb.jpg" /></a>
<a id="img_1" href="#"><img src="textures/sprite0.jpg" /></a>
<a id="img_2" href="#"><img src="textures/sprite0.png" /></a>
<a id="img_3" href="#"><img src="textures/lensflare/lensflare0.png" /></a>
<a id="img_4" href="#"><img src="textures/lensflare/lensflare0_alpha.png" /></a>
<a id="img_5" href="#"><img src="textures/sprites/ball.png" /></a>
<a id="img_6" href="#"><img src="textures/sprites/snowflake7_alpha.png" /></a>
</div>
<div id="backgrounds" class="menu">
Background
<a id="bg_0" href="#"><img src="textures/disturb.jpg" /></a>
<a id="bg_1" href="#"></a>
<a id="bg_2" href="#"></a>
<a id="bg_3" href="#"><img src="textures/crate.gif" /></a>
<a id="bg_4" href="#"><img src="textures/lava/lavatile.jpg" /></a>
<a id="bg_5" href="#"><img src="textures/water.jpg" /></a>
<a id="bg_6" href="#"><img src="textures/lava/cloud.png" /></a>
</div>
<div id="labels" class="menu">
Equation<br/><br/>
<div class="lbl btn" id="btn_add">Add</div>
<div class="lbl btn" id="btn_sub">Subtract</div>
<div class="lbl btn" id="btn_rsub">ReverseSubtract</div>
Premultiply alpha<br/><br/>
<div class="lbl btn" id="btn_pre">On</div>
<div class="lbl btn" id="btn_nopre">Off</div>
Labels<br/><br/>
<div class="lbl" id="lbl_src">Source</div>
<div class="lbl" id="lbl_dst">Destination</div>
</div>
<script src="../build/three.min.js"></script>
<script src="js/Detector.js"></script>
<script>
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
var camera, scene, renderer;
var materialBg;
var materials = [];
var mapsPre = [];
var mapsNoPre = [];
var currentMaps = mapsNoPre;
var currentIndex = 4;
init();
animate();
function init() {
// CAMERA
camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 1000 );
camera.position.z = 700;
// SCENE
scene = new THREE.Scene();
// BACKGROUND IMAGES
var x = document.createElement( "canvas" );
var xc = x.getContext( "2d" );
x.width = x.height = 128;
xc.fillStyle = "#eee";
xc.fillRect( 0, 0, 128, 128 );
xc.fillStyle = "#999";
xc.fillRect( 0, 0, 64, 64 );
xc.fillStyle = "#aaa";
xc.fillRect( 32, 32, 32, 32 );
xc.fillStyle = "#999";
xc.fillRect( 64, 64, 64, 64 );
xc.fillStyle = "#bbb";
xc.fillRect( 96, 96, 32, 32 );
document.getElementById("bg_1").appendChild( x );
var x2 = document.createElement( "canvas" );
var xc2 = x2.getContext( "2d" );
x2.width = x2.height = 128;
xc2.fillStyle = "#444";
xc2.fillRect( 0, 0, 128, 128 );
xc2.fillStyle = "#000";
xc2.fillRect( 0, 0, 64, 64 );
xc2.fillStyle = "#111";
xc2.fillRect( 32, 32, 32, 32 );
xc2.fillStyle = "#000";
xc2.fillRect( 64, 64, 64, 64 );
xc2.fillStyle = "#222";
xc2.fillRect( 96, 96, 32, 32 );
document.getElementById("bg_1").appendChild( x );
document.getElementById("bg_2").appendChild( x2 );
var mapBg0 = new THREE.Texture( x );
mapBg0.wrapS = mapBg0.wrapT = THREE.RepeatWrapping;
mapBg0.repeat.set( 128, 64 );
mapBg0.needsUpdate = true;
var mapBg1 = new THREE.Texture( x2 );
mapBg1.wrapS = mapBg1.wrapT = THREE.RepeatWrapping;
mapBg1.repeat.set( 128, 64 );
mapBg1.needsUpdate = true;
var mapBg2 = THREE.ImageUtils.loadTexture( "textures/disturb.jpg" );
mapBg2.wrapS = mapBg2.wrapT = THREE.RepeatWrapping;
mapBg2.repeat.set( 8, 4 );
var mapBg3 = THREE.ImageUtils.loadTexture( "textures/crate.gif" );
mapBg3.wrapS = mapBg3.wrapT = THREE.RepeatWrapping;
mapBg3.repeat.set( 32, 16 );
var mapBg4 = THREE.ImageUtils.loadTexture( "textures/lava/lavatile.jpg" );
mapBg4.wrapS = mapBg4.wrapT = THREE.RepeatWrapping;
mapBg4.repeat.set( 8, 4 );
var mapBg5 = THREE.ImageUtils.loadTexture( "textures/water.jpg" );
mapBg5.wrapS = mapBg5.wrapT = THREE.RepeatWrapping;
mapBg5.repeat.set( 8, 4 );
var mapBg6 = THREE.ImageUtils.loadTexture( "textures/lava/cloud.png" );
mapBg6.wrapS = mapBg6.wrapT = THREE.RepeatWrapping;
mapBg6.repeat.set( 2, 1 );
// BACKGROUND
materialBg = new THREE.MeshBasicMaterial( { map: mapBg1 } );
var meshBg = new THREE.Mesh( new THREE.PlaneBufferGeometry( 4000, 2000 ), materialBg );
meshBg.position.set( 0, 0, -1 );
scene.add( meshBg );
// FOREGROUND IMAGES
var images = [ 'textures/disturb.jpg',
'textures/sprite0.jpg',
'textures/sprite0.png',
'textures/lensflare/lensflare0.png',
'textures/lensflare/lensflare0_alpha.png',
'textures/sprites/ball.png',
'textures/sprites/snowflake7_alpha.png' ];
for ( var i = 0; i < images.length; i ++ ) {
var map = THREE.ImageUtils.loadTexture( images[ i ] );
var mapPre = map.clone();
mapPre.premultiplyAlpha = true;
mapPre.needsUpdate = true;
mapsNoPre.push( map );
mapsPre.push( mapPre );
}
// FOREGROUND OBJECTS
var blendings = [ "NoBlending", "NormalBlending", "AdditiveBlending", "SubtractiveBlending", "MultiplyBlending", "AdditiveAlphaBlending" ];
var src = [ "ZeroFactor", "OneFactor", "SrcAlphaFactor", "OneMinusSrcAlphaFactor", "DstAlphaFactor", "OneMinusDstAlphaFactor", "DstColorFactor", "OneMinusDstColorFactor", "SrcAlphaSaturateFactor" ];
var dst = [ "ZeroFactor", "OneFactor", "SrcColorFactor", "OneMinusSrcColorFactor", "SrcAlphaFactor", "OneMinusSrcAlphaFactor", "DstAlphaFactor", "OneMinusDstAlphaFactor" ];
var geo1 = new THREE.PlaneBufferGeometry( 100, 100 );
var geo2 = new THREE.PlaneBufferGeometry( 100, 25 );
var blending = "CustomBlending";
for ( var i = 0; i < dst.length; i ++ ) {
var blendDst = dst[ i ];
for ( var j = 0; j < src.length; j ++ ) {
var blendSrc = src[ j ];
var material = new THREE.MeshBasicMaterial( { map: currentMaps[ currentIndex ] } );
material.transparent = true;
material.blending = THREE[ blending ];
material.blendSrc = THREE[ blendSrc ];
material.blendDst = THREE[ blendDst ];
material.blendEquation = THREE.AddEquation;
var x = ( j - src.length / 2 ) * 110;
var z = 0;
var y = ( i - dst.length / 2 ) * 110 + 50;
var mesh = new THREE.Mesh( geo1, material );
mesh.position.set( x, y, z );
mesh.matrixAutoUpdate = false;
mesh.updateMatrix();
scene.add( mesh );
materials.push( material );
}
}
for ( var j = 0; j < src.length; j ++ ) {
var blendSrc = src[ j ];
var x = ( j - src.length / 2 ) * 110;
var z = 0;
var y = ( 0 - dst.length / 2 ) * 110 + 50;
var mesh = new THREE.Mesh( geo2, generateLabelMaterial( blendSrc.replace( "Factor", "" ), "rgba( 0, 150, 0, 1 )" ) );
mesh.position.set( x, - (y - 70), z );
mesh.matrixAutoUpdate = false;
mesh.updateMatrix();
scene.add( mesh );
}
for ( var i = 0; i < dst.length; i ++ ) {
var blendDst = dst[ i ];
var x = ( 0 - src.length / 2 ) * 110 - 125;
var z = 0;
var y = ( i - dst.length / 2 ) * 110 + 165;
var mesh = new THREE.Mesh( geo2, generateLabelMaterial( blendDst.replace( "Factor", "" ), "rgba( 150, 0, 0, 1 )" ) );
mesh.position.set( x, - (y - 70), z );
mesh.matrixAutoUpdate = false;
mesh.updateMatrix();
scene.add( mesh );
}
// RENDERER
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.domElement.style.position = "absolute";
renderer.domElement.style.left = "215px";
document.body.appendChild( renderer.domElement );
// EVENTS
window.addEventListener( 'resize', onWindowResize, false );
addImgHandler( "img_0", 0 );
addImgHandler( "img_1", 1 );
addImgHandler( "img_2", 2 );
addImgHandler( "img_3", 3 );
addImgHandler( "img_4", 4 );
addImgHandler( "img_5", 5 );
addImgHandler( "img_6", 6 );
addBgHandler( "bg_0", mapBg2 );
addBgHandler( "bg_1", mapBg0 );
addBgHandler( "bg_2", mapBg1 );
addBgHandler( "bg_3", mapBg3 );
addBgHandler( "bg_4", mapBg4 );
addBgHandler( "bg_5", mapBg5 );
addBgHandler( "bg_6", mapBg6 );
addEqHandler( "btn_add", THREE.AddEquation );
addEqHandler( "btn_sub", THREE.SubtractEquation );
addEqHandler( "btn_rsub", THREE.ReverseSubtractEquation );
addPreHandler( "btn_pre", mapsPre );
addPreHandler( "btn_nopre", mapsNoPre );
}
//
function addImgHandler( id, index ) {
var el = document.getElementById( id );
el.addEventListener( 'click', function () {
for ( var i = 0; i < materials.length; i ++ ) {
materials[ i ].map = currentMaps[ index ];
}
currentIndex = index;
} );
}
function addEqHandler( id, eq ) {
var el = document.getElementById( id );
el.addEventListener( 'click', function () {
for ( var i = 0; i < materials.length; i ++ ) {
materials[ i ].blendEquation = eq;
}
document.getElementById( "btn_add" ).style.backgroundColor = "transparent";
document.getElementById( "btn_sub" ).style.backgroundColor = "transparent";
document.getElementById( "btn_rsub" ).style.backgroundColor = "transparent";
el.style.backgroundColor = "darkorange";
});
}
function addBgHandler( id, map ) {
var el = document.getElementById( id );
el.addEventListener( 'click', function () { materialBg.map = map; } );
}
function addPreHandler( id, marray ) {
var el = document.getElementById( id );
el.addEventListener( 'click', function () {
currentMaps = marray;
for ( var i = 0; i < materials.length; i ++ ) {
materials[ i ].map = currentMaps[ currentIndex ];
}
document.getElementById( "btn_pre" ).style.backgroundColor = "transparent";
document.getElementById( "btn_nopre" ).style.backgroundColor = "transparent";
el.style.backgroundColor = "darkorange";
} );
}
//
function onWindowResize( event ) {
renderer.setSize( window.innerWidth, window.innerHeight );
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
}
//
function generateLabelMaterial( text, bg ) {
var x = document.createElement( "canvas" );
var xc = x.getContext( "2d" );
x.width = 128;
x.height = 32;
xc.fillStyle = bg;
xc.fillRect( 0, 0, 128, 32 );
//xc.shadowColor = "#000";
//xc.shadowBlur = 3;
xc.fillStyle = "white";
xc.font = "12pt arial bold";
xc.fillText( text, 8, 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 );
var time = Date.now() * 0.00025;
var ox = ( time * -0.01 * materialBg.map.repeat.x ) % 1;
var oy = ( time * -0.01 * materialBg.map.repeat.y ) % 1;
materialBg.map.offset.set( ox, oy );
renderer.render( scene, camera );
}
</script>
</body>
</html>