1 files changed, 87 insertions, 0 deletions
diff --git a/intern/cycles/bvh/bvh4.h b/intern/cycles/bvh/bvh4.h
new file mode 100644
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+++ b/intern/cycles/bvh/bvh4.h
@@ -0,0 +1,87 @@
+/*
+ * Adapted from code copyright 2009-2010 NVIDIA Corporation
+ * Modifications Copyright 2011, 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.
+ */
+
+#ifndef __BVH4_H__
+#define __BVH4_H__
+
+#include "bvh/bvh.h"
+#include "bvh/bvh_params.h"
+
+#include "util/util_types.h"
+#include "util/util_vector.h"
+
+CCL_NAMESPACE_BEGIN
+
+class BVHNode;
+struct BVHStackEntry;
+class BVHParams;
+class BoundBox;
+class LeafNode;
+class Object;
+class Progress;
+
+#define BVH_QNODE_SIZE           8
+#define BVH_QNODE_LEAF_SIZE      1
+#define BVH_UNALIGNED_QNODE_SIZE 14
+
+/* BVH4
+ *
+ * Quad BVH, with each node having four children, to use with SIMD instructions.
+ */
+class BVH4 : public BVH {
+protected:
+	/* constructor */
+	friend class BVH;
+	BVH4(const BVHParams& params, const vector<Object*>& objects);
+
+	/* pack */
+	void pack_nodes(const BVHNode *root);
+
+	void pack_leaf(const BVHStackEntry& e, const LeafNode *leaf);
+	void pack_inner(const BVHStackEntry& e, const BVHStackEntry *en, int num);
+
+	void pack_aligned_inner(const BVHStackEntry& e,
+	                        const BVHStackEntry *en,
+	                        int num);
+	void pack_aligned_node(int idx,
+	                       const BoundBox *bounds,
+	                       const int *child,
+	                       const uint visibility,
+	                       const float time_from,
+	                       const float time_to,
+	                       const int num);
+
+	void pack_unaligned_inner(const BVHStackEntry& e,
+	                          const BVHStackEntry *en,
+	                          int num);
+	void pack_unaligned_node(int idx,
+	                         const Transform *aligned_space,
+	                         const BoundBox *bounds,
+	                         const int *child,
+	                         const uint visibility,
+	                         const float time_from,
+	                         const float time_to,
+	                         const int num);
+
+	/* refit */
+	void refit_nodes();
+	void refit_node(int idx, bool leaf, BoundBox& bbox, uint& visibility);
+};
+
+CCL_NAMESPACE_END
+
+#endif /* __BVH4_H__ */