mirror of
https://github.com/wahyd4/three.js.git
synced 2026-08-09 04:56:01 +10:00
Added alpha-test particle billboards example.
This commit is contained in:
alteredq
@@ -0,0 +1,282 @@
|
||||
<!doctype html>
|
||||
<html>
|
||||
<head>
|
||||
<meta charset="utf-8" />
|
||||
<title>three.js webgl - custom attributes [particles][billboards][alphatest]</title>
|
||||
<style>
|
||||
body {
|
||||
color: #ffffff;
|
||||
font-family:Monospace;
|
||||
font-size:13px;
|
||||
text-align:center;
|
||||
font-weight: bold;
|
||||
|
||||
background-color: #000000;
|
||||
margin: 0px;
|
||||
overflow: hidden;
|
||||
}
|
||||
#info {
|
||||
color: #fff;
|
||||
position: absolute;
|
||||
top: 0px; width: 100%;
|
||||
padding: 5px;
|
||||
z-index:100;
|
||||
}
|
||||
|
||||
</style>
|
||||
</head>
|
||||
|
||||
<body>
|
||||
<div id="info"><a href="http://github.com/mrdoob/three.js" target="_blank">three.js</a> - custom attributes example - particles - billboards - alphatest</div>
|
||||
<div id="container"></div>
|
||||
|
||||
<script src="../build/Three.js"></script>
|
||||
|
||||
<script type="text/javascript" src="js/RequestAnimationFrame.js"></script>
|
||||
<script type="text/javascript" src="js/Detector.js"></script>
|
||||
<script type="text/javascript" src="js/Stats.js"></script>
|
||||
|
||||
<script type="x-shader/x-vertex" id="vertexshader">
|
||||
|
||||
attribute float size;
|
||||
attribute vec4 ca;
|
||||
|
||||
varying vec4 vColor;
|
||||
|
||||
void main() {
|
||||
|
||||
vColor = ca;
|
||||
|
||||
vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );
|
||||
|
||||
gl_PointSize = size * ( 150.0 / length( mvPosition.xyz ) );
|
||||
|
||||
gl_Position = projectionMatrix * mvPosition;
|
||||
|
||||
}
|
||||
|
||||
</script>
|
||||
|
||||
<script type="x-shader/x-fragment" id="fragmentshader">
|
||||
|
||||
uniform vec3 color;
|
||||
uniform sampler2D texture;
|
||||
|
||||
varying vec4 vColor;
|
||||
|
||||
void main() {
|
||||
|
||||
vec4 outColor = texture2D( texture, gl_PointCoord );
|
||||
|
||||
if ( outColor.a < 0.5 ) discard;
|
||||
|
||||
gl_FragColor = outColor * vec4( color * vColor.xyz, 1.0 );
|
||||
|
||||
float depth = gl_FragCoord.z / gl_FragCoord.w;
|
||||
const vec3 fogColor = vec3( 0.0 );
|
||||
|
||||
float fogFactor = smoothstep( 200.0, 600.0, depth );
|
||||
gl_FragColor = mix( gl_FragColor, vec4( fogColor, gl_FragColor.w ), fogFactor );
|
||||
|
||||
}
|
||||
|
||||
</script>
|
||||
|
||||
|
||||
<script type="text/javascript">
|
||||
|
||||
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
|
||||
|
||||
var renderer, scene, camera, stats;
|
||||
|
||||
var object, uniforms, attributes;
|
||||
|
||||
var vc1;
|
||||
|
||||
var WIDTH = window.innerWidth,
|
||||
HEIGHT = window.innerHeight;
|
||||
|
||||
init();
|
||||
animate();
|
||||
|
||||
function init() {
|
||||
|
||||
camera = new THREE.Camera( 40, WIDTH / HEIGHT, 1, 1000 );
|
||||
camera.position.z = 500;
|
||||
|
||||
scene = new THREE.Scene();
|
||||
|
||||
attributes = {
|
||||
|
||||
size: { type: 'f', value: [] },
|
||||
ca: { type: 'c', value: [] }
|
||||
|
||||
};
|
||||
|
||||
uniforms = {
|
||||
|
||||
amplitude: { type: "f", value: 1.0 },
|
||||
color: { type: "c", value: new THREE.Color( 0xffffff ) },
|
||||
texture: { type: "t", value: 0, texture: THREE.ImageUtils.loadTexture( "textures/sprites/ball.png" ) },
|
||||
|
||||
};
|
||||
|
||||
uniforms.texture.texture.wrapS = uniforms.texture.texture.wrapT = THREE.RepeatWrapping;
|
||||
|
||||
var shaderMaterial = new THREE.MeshShaderMaterial( {
|
||||
|
||||
uniforms: uniforms,
|
||||
attributes: attributes,
|
||||
vertexShader: document.getElementById( 'vertexshader' ).textContent,
|
||||
fragmentShader: document.getElementById( 'fragmentshader' ).textContent
|
||||
|
||||
});
|
||||
|
||||
|
||||
var radius = 100, inner = 0.6 * radius;
|
||||
var geometry = new THREE.Geometry();
|
||||
|
||||
for ( var i = 0; i < 100000; i++ ) {
|
||||
|
||||
vector = new THREE.Vector3( Math.random() * 2 - 1, Math.random() * 2 - 1, Math.random() * 2 - 1 );
|
||||
|
||||
vector.multiplyScalar( radius );
|
||||
|
||||
if ( ( vector.x > inner || vector.x < -inner ) ||
|
||||
( vector.y > inner || vector.y < -inner ) ||
|
||||
( vector.z > inner || vector.z < -inner ) )
|
||||
|
||||
geometry.vertices.push( new THREE.Vertex( vector ) );
|
||||
|
||||
}
|
||||
|
||||
vc1 = geometry.vertices.length;
|
||||
|
||||
var m, dummyMaterial = new THREE.MeshFaceMaterial();
|
||||
|
||||
radius = 200;
|
||||
var geometry2 = new THREE.CubeGeometry( radius, 0.1 * radius, 0.1 * radius, 50, 5, 5 );
|
||||
|
||||
function addGeo( geo, x, y, z, ry ) {
|
||||
|
||||
m = new THREE.Mesh( geo, dummyMaterial );
|
||||
m.rotation.y = ry;
|
||||
m.position.set( x, y, z );
|
||||
THREE.GeometryUtils.merge( geometry, m );
|
||||
|
||||
}
|
||||
|
||||
// side 1
|
||||
|
||||
addGeo( geometry2, 0, 110, 110, 0 );
|
||||
addGeo( geometry2, 0, 110, -110, 0 );
|
||||
addGeo( geometry2, 0, -110, 110, 0 );
|
||||
addGeo( geometry2, 0, -110, -110, 0 );
|
||||
|
||||
// side 2
|
||||
|
||||
addGeo( geometry2, 110, 110, 0, 1.57 );
|
||||
addGeo( geometry2, 110, -110, 0, 1.57 );
|
||||
addGeo( geometry2, -110, 110, 0, 1.57 );
|
||||
addGeo( geometry2, -110, -110, 0, 1.57 );
|
||||
|
||||
// corner edges
|
||||
|
||||
var geometry3 = new THREE.CubeGeometry( 0.1 * radius, radius * 1.2, 0.1 * radius, 5, 60, 5 );
|
||||
|
||||
addGeo( geometry3, 110, 0, 110, 0 );
|
||||
addGeo( geometry3, 110, 0, -110, 0 );
|
||||
addGeo( geometry3, -110, 0, 110, 0 );
|
||||
addGeo( geometry3, -110, 0, -110, 0 );
|
||||
|
||||
// particle system
|
||||
|
||||
object = new THREE.ParticleSystem( geometry, shaderMaterial );
|
||||
object.dynamic = true;
|
||||
|
||||
// custom attributes
|
||||
|
||||
var vertices = object.geometry.vertices;
|
||||
|
||||
var values_size = attributes.size.value;
|
||||
var values_color = attributes.ca.value;
|
||||
|
||||
for( var v = 0; v < vertices.length; v++ ) {
|
||||
|
||||
values_size[ v ] = 10;
|
||||
values_color[ v ] = new THREE.Color( 0xffffff );
|
||||
|
||||
if ( v < vc1 ) {
|
||||
|
||||
values_color[ v ].setHSV( 0.5 + 0.2 * ( v / vc1 ), 0.99, 1.0 );
|
||||
|
||||
} else {
|
||||
|
||||
values_size[ v ] = 55;
|
||||
values_color[ v ].setHSV( 0.1, 0.99, 1.0 );
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
console.log( vertices.length );
|
||||
|
||||
scene.addObject( object );
|
||||
|
||||
renderer = new THREE.WebGLRenderer( { clearColor: 0x000000, clearAlpha: 1 } );
|
||||
renderer.setSize( WIDTH, HEIGHT );
|
||||
|
||||
var container = document.getElementById( 'container' );
|
||||
container.appendChild( renderer.domElement );
|
||||
|
||||
stats = new Stats();
|
||||
stats.domElement.style.position = 'absolute';
|
||||
stats.domElement.style.top = '0px';
|
||||
container.appendChild( stats.domElement );
|
||||
|
||||
}
|
||||
|
||||
function cap( x, a, b ) {
|
||||
|
||||
return ( x < a ) ? a : ( ( x > b ) ? b : x );
|
||||
|
||||
}
|
||||
|
||||
var i, value;
|
||||
|
||||
function animate() {
|
||||
|
||||
requestAnimationFrame( animate );
|
||||
|
||||
render();
|
||||
stats.update();
|
||||
|
||||
}
|
||||
|
||||
function render() {
|
||||
|
||||
var time = new Date().getTime() * 0.01;
|
||||
|
||||
object.rotation.y = 0.02 * time;
|
||||
object.rotation.z = 0.02 * time;
|
||||
|
||||
for( i = 0; i < attributes.size.value.length; i++ ) {
|
||||
|
||||
if ( i < vc1 )
|
||||
attributes.size.value[ i ] = 26 + 32 * Math.sin( 0.1 * i + 0.6 * time );
|
||||
|
||||
|
||||
}
|
||||
|
||||
attributes.size.needsUpdate = true;
|
||||
|
||||
renderer.render( scene, camera );
|
||||
|
||||
}
|
||||
|
||||
|
||||
</script>
|
||||
|
||||
</body>
|
||||
|
||||
</html>
|
||||
Reference in New Issue
Block a user