Open source Star Ruler 2 source code!

data/shaders/source/distant_faded_icon_ps.txt

@@ -0,0 +1,8 @@
+varying vec2 uv;
+
+void main() {
+	float rad = length(uv - vec2(0.5));
+	if(rad > 0.33)
+		discard;
+	gl_FragColor = vec4(gl_Color.rgb, (1.0 - max((rad - 0.28) / 0.05, 0)) * gl_Color.a);
+}