Repo created

libs/shaders/GL/route_marker.fsh.glsl

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+// Warning! Beware to use this shader. "discard" command may significally reduce performance.
+// Unfortunately some CG algorithms cannot be implemented without discarding fragments from depth buffer.
+
+layout (location = 0) in vec4 v_radius;
+layout (location = 1) in vec4 v_color;
+
+layout (location = 0) out vec4 v_FragColor;
+
+layout (binding = 0) uniform UBO
+{
+  mat4 u_modelView;
+  mat4 u_projection;
+  mat4 u_pivotTransform;
+  vec4 u_routeParams;
+  vec4 u_color;
+  vec4 u_maskColor;
+  vec4 u_outlineColor;
+  vec4 u_fakeColor;
+  vec4 u_fakeOutlineColor;
+  vec2 u_fakeBorders;
+  vec2 u_pattern;
+  vec2 u_angleCosSin;
+  float u_arrowHalfWidth;
+  float u_opacity;
+};
+
+const float kAntialiasingPixelsCount = 2.5;
+
+void main()
+{
+  vec4 finalColor = v_color;
+  float aaRadius = max(v_radius.z - kAntialiasingPixelsCount, 0.0);
+  float stepValue = smoothstep(aaRadius * aaRadius, v_radius.z * v_radius.z,
+                               dot(v_radius.xy, v_radius.xy));
+  finalColor.a = finalColor.a * u_opacity * (1.0 - stepValue);
+  if (finalColor.a < 0.01 || u_routeParams.y > v_radius.w)
+    discard;
+  finalColor = vec4(mix(finalColor.rgb, u_maskColor.rgb, u_maskColor.a), finalColor.a);
+  v_FragColor = finalColor;
+}