shaders moved to subdir; console click on the actor to type its id in

assets/shaders/alphadither.frag

@@ -0,0 +1,33 @@
+#version 120
+#ifdef GL_ES
+    precision mediump float;
+#endif
+
+varying vec4 v_color;
+varying vec2 v_texCoords;
+uniform sampler2D u_texture;
+
+int bayer[36] = int[](
+192,78,21,120,163,14,
+234,142,184,248,56,106,
+64,7,92,35,149,206,
+128,170,220,199,85,28,
+241,49,113,0,135,177,
+42,156,213,71,227,99
+);
+float bayerSize = 6.0;
+float bayerDivider = 256;
+
+vec2 boolean = vec2(0.0, 1.0);
+
+void main() {
+    vec4 inColor = v_color * (texture2D(u_texture, v_texCoords));
+    vec2 entry = mod(gl_FragCoord.xy, vec2(bayerSize, bayerSize));
+
+    float bayerThreshold = float(bayer[int(entry.y) * int(bayerSize) + int(entry.x)]) / bayerDivider;
+    float alpha = inColor.a;
+
+    vec4 selvec = vec4(0.0, 0.0, 0.0, (alpha > bayerThreshold) ? 1.0 : 0.0);
+
+    gl_FragColor = inColor * boolean.yyyx + selvec;
+}