Cycles: support for motion vector and UV passes.

Most of the changes are related to adding support for motion data throughout
the code. There's some code for actual camera/object motion blur raytracing
but it's unfinished (it badly slows down the raytracing kernel even when the
option is turned off), so that code it disabled still.

Motion vector export from Blender tries to avoid computing derived meshes
when the mesh does not have a deforming modifier, and it also won't store
motion vectors for every vertex if only the object or camera is moving.

1 files changed, 8 insertions, 5 deletions

diff --git a/intern/cycles/kernel/kernel_light.h b/intern/cycles/kernel/kernel_light.h
index 42260577069..c2cf293cab3 100644
--- a/intern/cycles/kernel/kernel_light.h
+++ b/intern/cycles/kernel/kernel_light.h
@@ -251,7 +251,7 @@ __device float regular_light_pdf(KernelGlobals *kg,
 /* Triangle Light */
 
 __device void triangle_light_sample(KernelGlobals *kg, int prim, int object,
-	float randu, float randv, LightSample *ls)
+	float randu, float randv, float time, LightSample *ls)
 {
 	/* triangle, so get position, normal, shader */
 	ls->P = triangle_sample_MT(kg, prim, randu, randv);
@@ -264,8 +264,11 @@ __device void triangle_light_sample(KernelGlobals *kg, int prim, int object,
 #ifdef __INSTANCING__
 	/* instance transform */
 	if(ls->object >= 0) {
-		object_position_transform(kg, ls->object, &ls->P);
-		object_normal_transform(kg, ls->object, &ls->Ng);
+		Transform tfm = object_fetch_transform(kg, ls->object, time, OBJECT_TRANSFORM);
+		Transform itfm = object_fetch_transform(kg, ls->object, time, OBJECT_INVERSE_TRANSFORM);
+
+		ls->P = transform_point(&tfm, ls->P);
+		ls->Ng = transform_direction_transposed(&itfm, ls->Ng);
 	}
 #endif
 }
@@ -313,7 +316,7 @@ __device int light_distribution_sample(KernelGlobals *kg, float randt)
 
 /* Generic Light */
 
-__device void light_sample(KernelGlobals *kg, float randt, float randu, float randv, float3 P, LightSample *ls, float *pdf)
+__device void light_sample(KernelGlobals *kg, float randt, float randu, float randv, float time, float3 P, LightSample *ls, float *pdf)
 {
 	/* sample index */
 	int index = light_distribution_sample(kg, randt);
@@ -324,7 +327,7 @@ __device void light_sample(KernelGlobals *kg, float randt, float randu, float ra
 
 	if(prim >= 0) {
 		int object = __float_as_int(l.w);
-		triangle_light_sample(kg, prim, object, randu, randv, ls);
+		triangle_light_sample(kg, prim, object, randu, randv, time, ls);
 	}
 	else {
 		int point = -prim-1;