Cycles: support for different 3D transform per volume grid

This is not yet fully supported by automatic volume bounds but works fine in
most cases that will have mostly matching bounds.

Ref T73201

1 files changed, 13 insertions, 2 deletions

diff --git a/intern/cycles/kernel/kernels/cuda/kernel_cuda_image.h b/intern/cycles/kernel/kernels/cuda/kernel_cuda_image.h
index 24bc3c7b59e..1d425d132a1 100644
--- a/intern/cycles/kernel/kernels/cuda/kernel_cuda_image.h
+++ b/intern/cycles/kernel/kernels/cuda/kernel_cuda_image.h
@@ -149,10 +149,21 @@ ccl_device float4 kernel_tex_image_interp(KernelGlobals *kg, int id, float x, fl
   }
 }
 
-ccl_device float4 kernel_tex_image_interp_3d(
-    KernelGlobals *kg, int id, float x, float y, float z, InterpolationType interp)
+ccl_device float4 kernel_tex_image_interp_3d(KernelGlobals *kg,
+                                             int id,
+                                             float3 P,
+                                             InterpolationType interp)
 {
   const TextureInfo &info = kernel_tex_fetch(__texture_info, id);
+
+  if (info.use_transform_3d) {
+    P = transform_point(&info.transform_3d, P);
+  }
+
+  const float x = P.x;
+  const float y = P.y;
+  const float z = P.z;
+
   CUtexObject tex = (CUtexObject)info.data;
   uint interpolation = (interp == INTERPOLATION_NONE) ? info.interpolation : interp;