Partial 7.0 merge - API preview

core/assets/shaders/caustics.frag

@@ -0,0 +1,24 @@
+#define HIGHP
+
+#define NSCALE 200.0 / 1.8
+
+uniform sampler2D u_texture;
+uniform sampler2D u_noise;
+
+uniform vec2 u_campos;
+uniform vec2 u_resolution;
+uniform float u_time;
+
+varying vec2 v_texCoords;
+
+void main(){
+    vec2 c = v_texCoords.xy;
+    vec2 coords = vec2(c.x * u_resolution.x + u_campos.x, c.y * u_resolution.y + u_campos.y);
+
+    float btime = u_time / 3400.0;
+    vec4 noise1 = texture2D(u_noise, (coords) / NSCALE + vec2(btime) * vec2(-0.9, 0.8));
+    vec4 noise2 = texture2D(u_noise, (coords) / NSCALE + vec2(btime * 1.1) * vec2(0.8, -1.0));
+    //vec4 noise3 = texture2D(u_noise, (coords) / (NSCALE * 2.0) + vec2(btime * 0.9) * vec2(0.8, 1.0));
+
+    gl_FragColor = vec4(vec3(min(noise1.r, noise2.r)), 0.2);
+}