1 files changed, 19 insertions, 2 deletions
diff --git a/shaders/test.frag b/shaders/test.frag
index d9b76c1..9dd03ea 100644
--- a/shaders/test.frag
+++ b/shaders/test.frag
@@ -6,7 +6,24 @@ out vec4 color;
 uniform float offset;
 uniform float r;
 
+uniform float radius = 1.;
+uniform float pitch = 440.;
+
+vec3 getcol() {
+	vec2 c = vec2(0.8, 0.2);
+	if (pitch > 4.0)
+		return c.xyy;
+    else if (pitch > 3.0)
+		return c.yxy;
+	else
+		return c.yxx;
+}
+
 void main() {
-  color = vec4(mod(uv.xyx + offset + vec2(0,0.5).xxy, vec3(1)), 1);
-  color.r = r;
+    vec2 p = uv*2.-1.;
+	p.y *= 16./9.;
+
+	color = vec4(mod(p.xyx + offset + vec2(0,0.5).xxy, vec3(1)), 1);
+	color.r = r;
+	color.rgb = mix(color.rgb, getcol(), smoothstep(1, 0.9, length(p) / pow(radius, 0.4)));
 }