1 files changed, 55 insertions, 0 deletions
diff --git a/intern/cycles/kernel/svm/voxel.h b/intern/cycles/kernel/svm/voxel.h
new file mode 100644
index 00000000000..43947fbc54f
--- /dev/null
+++ b/intern/cycles/kernel/svm/voxel.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2011-2015 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+CCL_NAMESPACE_BEGIN
+
+/* TODO(sergey): Think of making it more generic volume-type attribute
+ * sampler.
+ */
+ccl_device_noinline int svm_node_tex_voxel(
+    KernelGlobals kg, ccl_private ShaderData *sd, ccl_private float *stack, uint4 node, int offset)
+{
+  uint co_offset, density_out_offset, color_out_offset, space;
+  svm_unpack_node_uchar4(node.z, &co_offset, &density_out_offset, &color_out_offset, &space);
+#ifdef __VOLUME__
+  int id = node.y;
+  float3 co = stack_load_float3(stack, co_offset);
+  if (space == NODE_TEX_VOXEL_SPACE_OBJECT) {
+    co = volume_normalized_position(kg, sd, co);
+  }
+  else {
+    kernel_assert(space == NODE_TEX_VOXEL_SPACE_WORLD);
+    Transform tfm;
+    tfm.x = read_node_float(kg, &offset);
+    tfm.y = read_node_float(kg, &offset);
+    tfm.z = read_node_float(kg, &offset);
+    co = transform_point(&tfm, co);
+  }
+
+  float4 r = kernel_tex_image_interp_3d(kg, id, co, INTERPOLATION_NONE);
+#else
+  float4 r = make_float4(0.0f, 0.0f, 0.0f, 0.0f);
+#endif
+  if (stack_valid(density_out_offset))
+    stack_store_float(stack, density_out_offset, r.w);
+  if (stack_valid(color_out_offset))
+    stack_store_float3(stack, color_out_offset, make_float3(r.x, r.y, r.z));
+  return offset;
+}
+
+CCL_NAMESPACE_END