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

assets/shaders/skyboxfill.frag

@@ -0,0 +1,38 @@
+#version 120
+#ifdef GL_ES
+    precision mediump float;
+#endif
+
+
+varying vec4 v_color;
+varying vec2 v_texCoords;
+uniform sampler2D u_texture;
+
+
+uniform vec3 topColor;
+uniform vec3 bottomColor;
+uniform float parallax = 0.0; // +1.0: all top col, -1.0: all bototm col, 0.0: normal grad
+uniform float parallax_size = 1.0/3.0; // 0: no parallax
+
+
+
+void main(void) {
+    float scale = v_texCoords.y * (1.0 - parallax_size) + (parallax_size / 2.0) + (parallax * parallax_size / 2.0);
+
+    float inR = mix(bottomColor.r, topColor.r, scale);
+    float inG = mix(bottomColor.g, topColor.g, scale);
+    float inB = mix(bottomColor.b, topColor.b, scale);
+
+    gl_FragColor = vec4(inR, inG, inB, 1.0);
+}
+/*
+UV mapping coord.y
+
+-+ <- 1.0  =
+D|         = // parallax of +1
+i|  =      =
+s|  = // parallax of 0
+p|  =      =
+.|         = // parallax of -1
+-+ <- 0.0  =
+*/