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/*
* Copyright 2011-2016 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 __BVH_UNALIGNED_H__
#define __BVH_UNALIGNED_H__
#include "util/vector.h"
CCL_NAMESPACE_BEGIN
class BoundBox;
class BVHObjectBinning;
class BVHRange;
class BVHReference;
struct Transform;
class Object;
/* Helper class to perform calculations needed for unaligned nodes. */
class BVHUnaligned {
public:
BVHUnaligned(const vector<Object *> &objects);
/* Calculate alignment for the oriented node for a given range. */
Transform compute_aligned_space(const BVHObjectBinning &range,
const BVHReference *references) const;
Transform compute_aligned_space(const BVHRange &range, const BVHReference *references) const;
/* Calculate alignment for the oriented node for a given reference.
*
* Return true when space was calculated successfully.
*/
bool compute_aligned_space(const BVHReference &ref, Transform *aligned_space) const;
/* Calculate primitive's bounding box in given space. */
BoundBox compute_aligned_prim_boundbox(const BVHReference &prim,
const Transform &aligned_space) const;
/* Calculate bounding box in given space. */
BoundBox compute_aligned_boundbox(const BVHObjectBinning &range,
const BVHReference *references,
const Transform &aligned_space,
BoundBox *cent_bounds = NULL) const;
BoundBox compute_aligned_boundbox(const BVHRange &range,
const BVHReference *references,
const Transform &aligned_space,
BoundBox *cent_bounds = NULL) const;
/* Calculate affine transform for node packing.
* Bounds will be in the range of 0..1.
*/
static Transform compute_node_transform(const BoundBox &bounds, const Transform &aligned_space);
protected:
/* List of objects BVH is being created for. */
const vector<Object *> &objects_;
};
CCL_NAMESPACE_END
#endif /* __BVH_UNALIGNED_H__ */
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