mirror of
https://github.com/wassname/phaser.git
synced 2026-06-29 16:30:29 +08:00
photonstorm
145 lines
3.5 KiB
JavaScript
145 lines
3.5 KiB
JavaScript
PIXI.StarFieldFilter = function(width, height, texture)
|
|
{
|
|
PIXI.AbstractFilter.call( this );
|
|
|
|
this.passes = [this];
|
|
|
|
var d = new Date();
|
|
|
|
var dates = [
|
|
d.getFullYear(), // the year (four digits)
|
|
d.getMonth(), // the month (from 0-11)
|
|
d.getDate(), // the day of the month (from 1-31)
|
|
d.getHours()*60.0*60 + d.getMinutes()*60 + d.getSeconds()
|
|
];
|
|
|
|
this.uniforms = {
|
|
iResolution: { type: '3f', value: { x: width, y: height, z: 0 }},
|
|
iGlobalTime: { type: '1f', value: 1 },
|
|
iDate: { type: '4fv', value: dates },
|
|
iChannel0: { type: 'sampler2D', value: texture, textureData: { repeat: true } }
|
|
};
|
|
|
|
// Shader by Rebb / TRSI (https://www.shadertoy.com/view/XdX3Wn)
|
|
this.fragmentSrc = [
|
|
"precision mediump float;",
|
|
"uniform vec3 iResolution;",
|
|
"uniform float iGlobalTime;",
|
|
"uniform float iChannelTime[4];",
|
|
"uniform vec4 iMouse;",
|
|
"uniform vec4 iDate;",
|
|
"uniform vec3 iChannelResolution[4];",
|
|
"uniform sampler2D iChannel0;",
|
|
|
|
"// add any extra uniforms here",
|
|
|
|
"const float tau = 6.28318530717958647692;",
|
|
|
|
"// Gamma correction",
|
|
"#define GAMMA (2.2)",
|
|
|
|
"vec3 ToLinear( in vec3 col )",
|
|
"{",
|
|
"// simulate a monitor, converting colour values into light values",
|
|
"return pow( col, vec3(GAMMA) );",
|
|
"}",
|
|
|
|
"vec3 ToGamma( in vec3 col )",
|
|
"{",
|
|
"// convert back into colour values, so the correct light will come out of the monitor",
|
|
"return pow( col, vec3(1.0/GAMMA) );",
|
|
"}",
|
|
|
|
"vec4 Noise( in ivec2 x )",
|
|
"{",
|
|
"return texture2D( iChannel0, (vec2(x)+0.5)/256.0, -100.0 );",
|
|
"}",
|
|
|
|
"vec4 Rand( in int x )",
|
|
"{",
|
|
"vec2 uv;",
|
|
"uv.x = (float(x)+0.5)/256.0;",
|
|
"uv.y = (floor(uv.x)+0.5)/256.0;",
|
|
"return texture2D( iChannel0, uv, -100.0 );",
|
|
"}",
|
|
|
|
|
|
"void main(void)",
|
|
"{",
|
|
"vec3 ray;",
|
|
"ray.xy = 2.0*(gl_FragCoord.xy-iResolution.xy*.5)/iResolution.x;",
|
|
"ray.z = 1.0;",
|
|
|
|
"float offset = iGlobalTime*.5;",
|
|
"float speed2 = (cos(offset)+1.0)*2.0;",
|
|
"float speed = speed2+.1;",
|
|
"offset += sin(offset)*.96;",
|
|
"offset *= 2.0;",
|
|
|
|
|
|
"vec3 col = vec3(0);",
|
|
|
|
"vec3 stp = ray/max(abs(ray.x),abs(ray.y));",
|
|
|
|
"vec3 pos = 2.0*stp+.5;",
|
|
"for ( int i=0; i < 20; i++ )",
|
|
"{",
|
|
"float z = Noise(ivec2(pos.xy)).x;",
|
|
"z = fract(z-offset);",
|
|
"float d = 50.0*z-pos.z;",
|
|
"float w = pow(max(0.0,1.0-8.0*length(fract(pos.xy)-.5)),2.0);",
|
|
"vec3 c = max(vec3(0),vec3(1.0-abs(d+speed2*.5)/speed,1.0-abs(d)/speed,1.0-abs(d-speed2*.5)/speed));",
|
|
"col += 1.5*(1.0-z)*c*w;",
|
|
"pos += stp;",
|
|
"}",
|
|
|
|
"gl_FragColor = vec4(ToGamma(col),1.0);",
|
|
"}"];
|
|
|
|
}
|
|
|
|
PIXI.StarFieldFilter.prototype = Object.create( PIXI.AbstractFilter.prototype );
|
|
PIXI.StarFieldFilter.prototype.constructor = PIXI.StarFieldFilter;
|
|
|
|
Object.defineProperty(PIXI.StarFieldFilter.prototype, 'iGlobalTime', {
|
|
get: function() {
|
|
return this.uniforms.iGlobalTime.value;
|
|
},
|
|
set: function(value) {
|
|
this.uniforms.iGlobalTime.value = value;
|
|
}
|
|
});
|
|
|
|
var game = new Phaser.Game(800, 600, Phaser.AUTO, 'phaser-example', { preload: preload, create: create, update: update, render: render });
|
|
|
|
function preload() {
|
|
|
|
// game.load.image('texture', 'wip/64x64.png');
|
|
game.load.image('texture', 'wip/tex16.png');
|
|
|
|
}
|
|
|
|
var filter;
|
|
var sprite;
|
|
|
|
function create() {
|
|
|
|
sprite = game.add.sprite(0, 0, 'texture');
|
|
sprite.width = 800;
|
|
sprite.height = 600;
|
|
|
|
filter = new PIXI.StarFieldFilter(sprite.width, sprite.height, sprite.texture);
|
|
|
|
sprite.filters = [filter];
|
|
|
|
}
|
|
|
|
function update() {
|
|
|
|
filter.iGlobalTime = game.time.totalElapsedSeconds();
|
|
|
|
}
|
|
|
|
function render() {
|
|
}
|