Cycles: shadow pass support. Note that this only takes into account lamps,

emitting objects or world lighting do not contribute to the shadow pass.

Consider this more as a pass useful for some compositing tricks, unlike
other lighting passes this pass can't be used to exactly reconstruct the
combined pass.

1 files changed, 4 insertions, 1 deletions

diff --git a/intern/cycles/kernel/kernel_emission.h b/intern/cycles/kernel/kernel_emission.h
index 2243858a403..764ac599991 100644
--- a/intern/cycles/kernel/kernel_emission.h
+++ b/intern/cycles/kernel/kernel_emission.h
@@ -60,7 +60,8 @@ __device float3 direct_emissive_eval(KernelGlobals *kg, float rando,
 }
 
 __device bool direct_emission(KernelGlobals *kg, ShaderData *sd, int lindex,
-	float randt, float rando, float randu, float randv, Ray *ray, BsdfEval *eval)
+	float randt, float rando, float randu, float randv, Ray *ray, BsdfEval *eval,
+	bool *is_lamp)
 {
 	LightSample ls;
 
@@ -135,6 +136,8 @@ __device bool direct_emission(KernelGlobals *kg, ShaderData *sd, int lindex,
 		ray->t = 0.0f;
 	}
 
+	*is_lamp = (ls.prim == ~0);
+
 	return true;
 }