Added phaser build and hellophaser sample

filters/Tunnel.js

@@ -0,0 +1,71 @@
+/**
+* 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;
+    }
+
+});