mirror of
https://github.com/photonstorm/phaser
synced 2024-11-23 21:24:09 +00:00
130 lines
3.1 KiB
JavaScript
130 lines
3.1 KiB
JavaScript
/**
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* Original shader from http://glsl.heroku.com/e#4122.10
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* Tweaked, uniforms added and converted to Phaser/PIXI by Richard Davey
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*/
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Phaser.Filter.LightBeam = function (game) {
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Phaser.Filter.call(this, game);
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this.uniforms.alpha = { type: '1f', value: 1 }
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this.uniforms.thickness = { type: '1f', value: 70.0 }
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this.uniforms.speed = { type: '1f', value: 1.0 }
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this.uniforms.red = { type: '1f', value: 2.0 }
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this.uniforms.green = { type: '1f', value: 1.0 }
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this.uniforms.blue = { type: '1f', value: 1.0 }
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this.fragmentSrc = [
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"precision mediump float;",
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"uniform vec2 resolution;",
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"uniform float time;",
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"uniform float alpha;",
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"uniform float thickness;",
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"uniform float speed;",
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"uniform float red;",
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"uniform float green;",
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"uniform float blue;",
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"void main(void) {",
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"vec2 uPos = (gl_FragCoord.xy / resolution.xy);",
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"uPos.y -= 0.50;",
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"float vertColor = 0.0;",
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"for (float i = 0.0; i < 1.0; i++)",
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"{",
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"float t = time * (i + speed);",
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"uPos.y += sin(uPos.x + t) * 0.2;",
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"float fTemp = abs(1.0 / uPos.y / thickness);",
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"vertColor += fTemp;",
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"}",
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"vec4 color = vec4(vertColor * red, vertColor * green, vertColor * blue, alpha);",
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"gl_FragColor = color;",
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"}"
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];
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};
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Phaser.Filter.LightBeam.prototype = Object.create(Phaser.Filter.prototype);
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Phaser.Filter.LightBeam.prototype.constructor = Phaser.Filter.LightBeam;
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Phaser.Filter.LightBeam.prototype.init = function (width, height) {
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this.setResolution(width, height);
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}
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Object.defineProperty(Phaser.Filter.LightBeam.prototype, 'alpha', {
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get: function() {
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return this.uniforms.alpha.value;
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},
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set: function(value) {
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this.uniforms.alpha.value = value;
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}
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});
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Object.defineProperty(Phaser.Filter.LightBeam.prototype, 'red', {
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get: function() {
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return this.uniforms.red.value;
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},
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set: function(value) {
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this.uniforms.red.value = value;
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}
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});
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Object.defineProperty(Phaser.Filter.LightBeam.prototype, 'green', {
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get: function() {
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return this.uniforms.green.value;
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},
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set: function(value) {
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this.uniforms.green.value = value;
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}
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});
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Object.defineProperty(Phaser.Filter.LightBeam.prototype, 'blue', {
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get: function() {
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return this.uniforms.blue.value;
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},
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set: function(value) {
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this.uniforms.blue.value = value;
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}
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});
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Object.defineProperty(Phaser.Filter.LightBeam.prototype, 'thickness', {
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get: function() {
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return this.uniforms.thickness.value;
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},
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set: function(value) {
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this.uniforms.thickness.value = value;
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}
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});
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Object.defineProperty(Phaser.Filter.LightBeam.prototype, 'speed', {
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get: function() {
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return this.uniforms.speed.value;
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},
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set: function(value) {
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this.uniforms.speed.value = value;
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}
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});
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