1 files changed, 113 insertions, 0 deletions
diff --git a/source/blender/draw/engines/eevee/shaders/closure_eval_volume_lib.glsl b/source/blender/draw/engines/eevee/shaders/closure_eval_volume_lib.glsl
new file mode 100644
index 00000000000..e450b8ad3c8
--- /dev/null
+++ b/source/blender/draw/engines/eevee/shaders/closure_eval_volume_lib.glsl
@@ -0,0 +1,113 @@
+
+void output_aov(vec4 color, float value, uint hash)
+{
+  /* Unsupported. */
+}
+
+/* Surface BSDFs. */
+Closure closure_eval(ClosureDiffuse diffuse)
+{
+  return CLOSURE_DEFAULT;
+}
+Closure closure_eval(ClosureTranslucent translucent)
+{
+  return CLOSURE_DEFAULT;
+}
+Closure closure_eval(ClosureReflection reflection)
+{
+  return CLOSURE_DEFAULT;
+}
+Closure closure_eval(ClosureRefraction refraction)
+{
+  return CLOSURE_DEFAULT;
+}
+Closure closure_eval(ClosureEmission emission)
+{
+  Closure closure = CLOSURE_DEFAULT;
+  closure.emission = emission.emission;
+  return closure;
+}
+Closure closure_eval(ClosureTransparency transparency)
+{
+  return CLOSURE_DEFAULT;
+}
+Closure closure_eval(ClosureReflection reflection, ClosureRefraction refraction)
+{
+  return CLOSURE_DEFAULT;
+}
+Closure closure_eval(ClosureDiffuse diffuse, ClosureReflection reflection)
+{
+  return CLOSURE_DEFAULT;
+}
+Closure closure_eval(ClosureDiffuse diffuse,
+                     ClosureReflection reflection,
+                     ClosureReflection clearcoat)
+{
+  return CLOSURE_DEFAULT;
+}
+Closure closure_eval(ClosureDiffuse diffuse,
+                     ClosureReflection reflection,
+                     ClosureReflection clearcoat,
+                     ClosureRefraction refraction)
+{
+  return CLOSURE_DEFAULT;
+}
+Closure closure_eval(ClosureReflection reflection, ClosureReflection clearcoat)
+{
+  return CLOSURE_DEFAULT;
+}
+Closure closure_eval(ClosureHair hair)
+{
+  return CLOSURE_DEFAULT;
+}
+
+Closure closure_eval(ClosureVolumeScatter volume_scatter)
+{
+  Closure closure = CLOSURE_DEFAULT;
+  closure.scatter = volume_scatter.scattering;
+  closure.anisotropy = volume_scatter.anisotropy;
+  return closure;
+}
+Closure closure_eval(ClosureVolumeAbsorption volume_absorption)
+{
+  Closure closure = CLOSURE_DEFAULT;
+  closure.absorption = volume_absorption.absorption;
+  return closure;
+}
+Closure closure_eval(ClosureVolumeScatter volume_scatter,
+                     ClosureVolumeAbsorption volume_absorption,
+                     ClosureEmission emission)
+{
+  Closure closure = CLOSURE_DEFAULT;
+  closure.absorption = volume_absorption.absorption;
+  closure.scatter = volume_scatter.scattering;
+  closure.anisotropy = volume_scatter.anisotropy;
+  closure.emission = emission.emission;
+  return closure;
+}
+
+vec4 closure_to_rgba(Closure closure)
+{
+  /* Not supported */
+  return vec4(0.0);
+}
+
+Closure closure_mix(Closure cl1, Closure cl2, float fac)
+{
+  Closure cl;
+  cl.absorption = mix(cl1.absorption, cl2.absorption, fac);
+  cl.scatter = mix(cl1.scatter, cl2.scatter, fac);
+  cl.emission = mix(cl1.emission, cl2.emission, fac);
+  cl.anisotropy = mix(cl1.anisotropy, cl2.anisotropy, fac);
+  return cl;
+}
+
+Closure closure_add(Closure cl1, Closure cl2)
+{
+  Closure cl;
+  cl.absorption = cl1.absorption + cl2.absorption;
+  cl.scatter = cl1.scatter + cl2.scatter;
+  cl.emission = cl1.emission + cl2.emission;
+  cl.anisotropy = (cl1.anisotropy + cl2.anisotropy) / 2.0; /* Average phase (no multi lobe) */
+  return cl;
+}