Repo created

libs/shaders/GL/transit_marker.vsh.glsl

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+layout (location = 0) in vec3 a_position;
+layout (location = 1) in vec4 a_normal;
+layout (location = 2) in vec4 a_color;
+
+layout (location = 0) out vec4 v_offsets;
+layout (location = 1) out vec4 v_color;
+
+layout (binding = 0) uniform UBO
+{
+  mat4 u_modelView;
+  mat4 u_projection;
+  mat4 u_pivotTransform;
+  vec4 u_params;
+  float u_lineHalfWidth;
+  float u_maxRadius;
+};
+
+void main()
+{
+  vec4 pos = vec4(a_position.xy, 0, 1) * u_modelView;
+  vec2 normal = vec2(a_normal.x * u_params.x - a_normal.y * u_params.y,
+                     a_normal.x * u_params.y + a_normal.y * u_params.x);
+  vec2 shiftedPos = normal * u_params.z + pos.xy;
+  pos = vec4(shiftedPos, a_position.z, 1.0) * u_projection;
+  gl_Position = applyPivotTransform(pos, u_pivotTransform, 0.0);
+  vec2 offsets = abs(a_normal.zw);
+  v_offsets = vec4(a_normal.zw, offsets - 1.0);
+  v_color = a_color;
+}