Repo created

libs/shaders/GL/traffic.fsh.glsl

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+layout (location = 0) in vec2 v_colorTexCoord;
+layout (location = 1) in vec2 v_maskTexCoord;
+layout (location = 2) in float v_halfLength;
+
+layout (location = 0) out vec4 v_FragColor;
+
+layout (binding = 0) uniform UBO
+{
+  mat4 u_modelView;
+  mat4 u_projection;
+  mat4 u_pivotTransform;
+  vec4 u_trafficParams;
+  vec4 u_outlineColor;
+  vec4 u_lightArrowColor;
+  vec4 u_darkArrowColor;
+  float u_outline;
+  float u_opacity;
+};
+
+layout (binding = 1) uniform sampler2D u_colorTex;
+layout (binding = 2) uniform sampler2D u_maskTex;
+
+const float kAntialiasingThreshold = 0.92;
+const float kOutlineThreshold1 = 0.8;
+const float kOutlineThreshold2 = 0.5;
+const float kMaskOpacity = 0.7;
+
+void main()
+{
+  vec4 color = texture(u_colorTex, v_colorTexCoord);
+  float alphaCode = color.a;
+  vec4 mask = texture(u_maskTex, v_maskTexCoord);
+  color.a = u_opacity * (1.0 - smoothstep(kAntialiasingThreshold, 1.0, abs(v_halfLength)));
+  color.rgb = mix(color.rgb, mask.rgb * mix(u_lightArrowColor.rgb, u_darkArrowColor.rgb, step(alphaCode, 0.6)), mask.a * kMaskOpacity);
+  if (u_outline > 0.0)
+  {
+    color.rgb = mix(color.rgb, u_outlineColor.rgb, step(kOutlineThreshold1, abs(v_halfLength)));
+    color.rgb = mix(color.rgb, u_outlineColor.rgb, smoothstep(kOutlineThreshold2, kOutlineThreshold1, abs(v_halfLength)));
+  }
+  v_FragColor = color;
+}