mirror of
https://github.com/photonstorm/phaser
synced 2024-11-27 23:20:59 +00:00
96 lines
2.8 KiB
JavaScript
96 lines
2.8 KiB
JavaScript
PIXI.FireFilter = function(width, height, texture)
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{
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PIXI.AbstractFilter.call( this );
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this.passes = [this];
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var d = new Date();
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var dates = [
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d.getFullYear(), // the year (four digits)
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d.getMonth(), // the month (from 0-11)
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d.getDate(), // the day of the month (from 1-31)
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d.getHours()*60.0*60 + d.getMinutes()*60 + d.getSeconds()
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];
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this.uniforms = {
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resolution: { type: 'f2', value: { x: width, y: height }},
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mouse: { type: 'f2', value: { x: 0, y: 0 }},
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time: { type: 'f', value: 1 }
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};
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// http://glsl.heroku.com/e#11707.0
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// Heroku shader conversion
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this.fragmentSrc = [
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"#ifdef GL_ES",
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"precision mediump float;",
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"#endif",
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"uniform float time;",
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"uniform vec2 mouse;",
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"uniform vec2 resolution;",
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"vec3 iResolution = vec3(resolution.x,resolution.y,100.);",
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"vec4 iMouse = vec4(mouse.x,mouse.y,5.,5.);",
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"float iGlobalTime = time;",
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"uniform sampler2D iChannel0;",
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"// by @301z",
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"float rand(vec2 n) {",
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"return fract(cos(dot(n, vec2(12.9898, 4.1414))) * 43758.5453);",
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"}",
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"// Genera ruido en función de las coordenadas del pixel",
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"float noise(vec2 n) {",
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"const vec2 d = vec2(0.0, 1.0);",
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"vec2 b = floor(n), f = smoothstep(vec2(0.0), vec2(1.0), fract(n));",
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"return mix(mix(rand(b), rand(b + d.yx), f.x), mix(rand(b + d.xy), rand(b + d.yy), f.x), f.y);",
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"}",
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"// Fractional Brownian Amplitude. Suma varias capas de ruido.",
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"float fbm(vec2 n) {",
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"float total = 0.0, amplitude = 1.0;",
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"for (int i = 0; i < 4; i++) {",
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"total += noise(n) * amplitude;",
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"n += n;",
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"amplitude *= 0.5;",
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"}",
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"return total;",
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"}",
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"void main() {",
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"// Colores",
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"const vec3 c1 = vec3(0.5, 0.0, 0.1); // Rojo oscuro.",
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"const vec3 c2 = vec3(0.9, 0.0, 0.0); // Rojo claro.",
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"const vec3 c3 = vec3(0.2, 0.0, 0.0); // Rojo oscuro.",
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"const vec3 c4 = vec3(1.0, 0.9, 0.0); // Amarillo.",
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"const vec3 c5 = vec3(0.1); // Gris oscuro.",
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"const vec3 c6 = vec3(0.9); // Gris claro.",
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"vec2 p = gl_FragCoord.xy * 8.0 / iResolution.xx; // Desfasa las coordenadas para que haya más cambio de un resultado a los colindantes.",
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"float q = fbm(p - iGlobalTime * 0.1); // Ruido con offset para el movimiento.",
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"vec2 r = vec2(fbm(p + q + iGlobalTime * 0.7 - p.x - p.y), fbm(p + q - iGlobalTime * 0.4));",
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"vec3 c = mix(c1, c2, fbm(p + r)) + mix(c3, c4, r.x) - mix(c5, c6, r.y);",
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"gl_FragColor = vec4(c *",
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"cos(1.57 * gl_FragCoord.y / iResolution.y), // Gradiente más ocuro arriba.",
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"1.0);",
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"}"];
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}
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PIXI.FireFilter.prototype = Object.create( PIXI.AbstractFilter.prototype );
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PIXI.FireFilter.prototype.constructor = PIXI.FireFilter;
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Object.defineProperty(PIXI.FireFilter.prototype, 'iGlobalTime', {
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get: function() {
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return this.uniforms.time.value;
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},
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set: function(value) {
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this.uniforms.time.value = value;
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}
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});
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