1 files changed, 31 insertions, 0 deletions
diff --git a/source/blender/gpu/shaders/material/gpu_shader_material_light_path.glsl b/source/blender/gpu/shaders/material/gpu_shader_material_light_path.glsl
new file mode 100644
index 00000000000..50c87e3f105
--- /dev/null
+++ b/source/blender/gpu/shaders/material/gpu_shader_material_light_path.glsl
@@ -0,0 +1,31 @@
+void node_light_path(out float is_camera_ray,
+                     out float is_shadow_ray,
+                     out float is_diffuse_ray,
+                     out float is_glossy_ray,
+                     out float is_singular_ray,
+                     out float is_reflection_ray,
+                     out float is_transmission_ray,
+                     out float ray_length,
+                     out float ray_depth,
+                     out float diffuse_depth,
+                     out float glossy_depth,
+                     out float transparent_depth,
+                     out float transmission_depth)
+{
+  /* Supported. */
+  is_camera_ray = (rayType == EEVEE_RAY_CAMERA) ? 1.0 : 0.0;
+  is_shadow_ray = (rayType == EEVEE_RAY_SHADOW) ? 1.0 : 0.0;
+  is_diffuse_ray = (rayType == EEVEE_RAY_DIFFUSE) ? 1.0 : 0.0;
+  is_glossy_ray = (rayType == EEVEE_RAY_GLOSSY) ? 1.0 : 0.0;
+  /* Kind of supported. */
+  is_singular_ray = is_glossy_ray;
+  is_reflection_ray = is_glossy_ray;
+  is_transmission_ray = is_glossy_ray;
+  ray_depth = rayDepth;
+  diffuse_depth = (is_diffuse_ray == 1.0) ? rayDepth : 0.0;
+  glossy_depth = (is_glossy_ray == 1.0) ? rayDepth : 0.0;
+  transmission_depth = (is_transmission_ray == 1.0) ? glossy_depth : 0.0;
+  /* Not supported. */
+  ray_length = 1.0;
+  transparent_depth = 0.0;
+}