GCodeViewer -> Newer version of shader for options

resources/shaders/options_120_flat.fs

@@ -0,0 +1,35 @@
+// version 120 is needed for gl_PointCoord
+#version 120
+
+uniform vec3 uniform_color;
+uniform float percent_outline_radius;
+uniform float percent_center_radius;
+
+vec4 hardcoded_color(float sq_radius)
+{
+    if ((sq_radius < 0.005625) || (sq_radius > 0.180625))
+        return vec4(0.5 * uniform_color, 1.0);
+    else
+        return vec4(uniform_color, 1.0);
+}
+
+vec4 customizable_color(float sq_radius)
+{
+    float in_radius = 0.5 * percent_center_radius;
+    float out_radius = 0.5 * (1.0 - percent_outline_radius);
+    if ((sq_radius < in_radius * in_radius) || (sq_radius > out_radius * out_radius))
+        return vec4(0.5 * uniform_color, 1.0);
+    else
+        return vec4(uniform_color, 1.0);
+}
+
+void main()
+{
+    vec2 pos = gl_PointCoord - vec2(0.5, 0.5);
+    float sq_radius = dot(pos, pos);
+    if (sq_radius > 0.25)
+        discard;
+     
+    gl_FragColor = customizable_color(sq_radius);
+//    gl_FragColor = hardcoded_color(sq_radius);
+}