mirror of
https://github.com/photonstorm/phaser
synced 2024-11-30 16:39:34 +00:00
71 lines
1.9 KiB
JavaScript
71 lines
1.9 KiB
JavaScript
/**
|
|
* Original shader by 4rknova (https://www.shadertoy.com/view/lssGDn)
|
|
* Tweaked, uniforms added and converted to Phaser/PIXI by Richard Davey
|
|
*/
|
|
Phaser.Filter.Tunnel = function (game) {
|
|
|
|
Phaser.Filter.call(this, game);
|
|
|
|
this.uniforms.alpha = { type: '1f', value: 1 };
|
|
this.uniforms.origin = { type: '1f', value: 2.0 };
|
|
this.uniforms.iChannel0 = { type: 'sampler2D', value: null, textureData: { repeat: true } };
|
|
|
|
this.fragmentSrc = [
|
|
|
|
"precision mediump float;",
|
|
"uniform vec2 resolution;",
|
|
"uniform float time;",
|
|
"uniform sampler2D iChannel0;",
|
|
"uniform float alpha;",
|
|
"uniform float origin;",
|
|
|
|
"#define S 0.79577471545 // Precalculated 2.5 / PI",
|
|
"#define E 0.0001",
|
|
|
|
"void main(void)",
|
|
"{",
|
|
"vec2 p = (origin * gl_FragCoord.xy / resolution.xy - 1.0) * vec2(resolution.x / resolution.y, 1.0);",
|
|
"vec2 t = vec2(S * atan(p.x, p.y), 1.0 / max(length(p), E));",
|
|
"vec3 c = texture2D(iChannel0, t + vec2(time * 0.1, time)).xyz;",
|
|
"gl_FragColor = vec4(c / (t.y + 0.5), alpha);",
|
|
"}"
|
|
|
|
];
|
|
|
|
};
|
|
|
|
Phaser.Filter.Tunnel.prototype = Object.create(Phaser.Filter.prototype);
|
|
Phaser.Filter.Tunnel.prototype.constructor = Phaser.Filter.Tunnel;
|
|
|
|
Phaser.Filter.Tunnel.prototype.init = function (width, height, texture) {
|
|
|
|
this.setResolution(width, height);
|
|
this.uniforms.iChannel0.value = texture;
|
|
|
|
texture.baseTexture._powerOf2 = true;
|
|
|
|
};
|
|
|
|
Object.defineProperty(Phaser.Filter.Tunnel.prototype, 'alpha', {
|
|
|
|
get: function() {
|
|
return this.uniforms.alpha.value;
|
|
},
|
|
|
|
set: function(value) {
|
|
this.uniforms.alpha.value = value;
|
|
}
|
|
|
|
});
|
|
|
|
Object.defineProperty(Phaser.Filter.Tunnel.prototype, 'origin', {
|
|
|
|
get: function() {
|
|
return this.uniforms.origin.value;
|
|
},
|
|
|
|
set: function(value) {
|
|
this.uniforms.origin.value = value;
|
|
}
|
|
|
|
});
|