forked from bartvdbraak/blender
bc7ff3c2b4
This commit enables BVH leaf nodes split by the primitive type and makes it so BVH traversal code is now aware and benefits from this. As was mentioned in original commit, this change is crucial to be able to do single ray to multiple triangle intersection. But it also appears to give barely visible speedup in some scene. In any case there should be no noticeable slowdown, and this change is what we need to have anyway.
128 lines
3.3 KiB
C++
128 lines
3.3 KiB
C++
/*
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* Adapted from code copyright 2009-2010 NVIDIA Corporation
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* Modifications Copyright 2011, Blender Foundation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __BVH_BUILD_H__
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#define __BVH_BUILD_H__
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#include <float.h>
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#include "bvh.h"
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#include "bvh_binning.h"
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#include "util_boundbox.h"
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#include "util_task.h"
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#include "util_vector.h"
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CCL_NAMESPACE_BEGIN
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class BVHBuildTask;
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class BVHParams;
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class InnerNode;
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class Mesh;
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class Object;
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class Progress;
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/* BVH Builder */
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class BVHBuild
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{
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public:
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/* Constructor/Destructor */
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BVHBuild(
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const vector<Object*>& objects,
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vector<int>& prim_type,
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vector<int>& prim_index,
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vector<int>& prim_object,
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const BVHParams& params,
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Progress& progress);
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~BVHBuild();
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BVHNode *run();
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protected:
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friend class BVHMixedSplit;
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friend class BVHObjectSplit;
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friend class BVHSpatialSplit;
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friend class BVHBuildTask;
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/* adding references */
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void add_reference_mesh(BoundBox& root, BoundBox& center, Mesh *mesh, int i);
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void add_reference_object(BoundBox& root, BoundBox& center, Object *ob, int i);
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void add_references(BVHRange& root);
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/* building */
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BVHNode *build_node(const BVHRange& range, int level);
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BVHNode *build_node(const BVHObjectBinning& range, int level);
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BVHNode *create_leaf_node(const BVHRange& range);
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BVHNode *create_object_leaf_nodes(const BVHReference *ref, int start, int num);
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/* Leaf node type splitting. */
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BVHNode *create_primitive_leaf_node(const int *p_type,
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const int *p_index,
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const int *p_object,
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const BoundBox& bounds,
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uint visibility,
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int start,
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int nun);
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bool range_within_max_leaf_size(const BVHRange& range);
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/* threads */
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enum { THREAD_TASK_SIZE = 4096 };
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void thread_build_node(InnerNode *node, int child, BVHObjectBinning *range, int level);
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thread_mutex build_mutex;
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/* progress */
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void progress_update();
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/* tree rotations */
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void rotate(BVHNode *node, int max_depth);
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void rotate(BVHNode *node, int max_depth, int iterations);
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/* objects and primitive references */
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vector<Object*> objects;
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vector<BVHReference> references;
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int num_original_references;
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/* output primitive indexes and objects */
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vector<int>& prim_type;
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vector<int>& prim_index;
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vector<int>& prim_object;
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/* build parameters */
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BVHParams params;
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/* progress reporting */
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Progress& progress;
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double progress_start_time;
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size_t progress_count;
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size_t progress_total;
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size_t progress_original_total;
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/* spatial splitting */
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float spatial_min_overlap;
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vector<BoundBox> spatial_right_bounds;
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BVHSpatialBin spatial_bins[3][BVHParams::NUM_SPATIAL_BINS];
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/* threads */
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TaskPool task_pool;
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};
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CCL_NAMESPACE_END
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#endif /* __BVH_BUILD_H__ */
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