blender/intern/cycles/bvh/bvh.h
Patrick Mours bfb6fce659 Cycles: Add CPU+GPU rendering support with OptiX
Adds support for building multiple BVH types in order to support using both CPU and OptiX
devices for rendering simultaneously. Primitive packing for Embree and OptiX is now
standalone, so it only needs to be run once and can be shared between the two. Additionally,
BVH building was made a device call, so that each device backend can decide how to
perform the building. The multi-device for instance creates a special multi-BVH that holds
references to several sub-BVHs, one for each sub-device.

Reviewed By: brecht, kevindietrich

Differential Revision: https://developer.blender.org/D9718
2020-12-11 13:24:29 +01:00

103 lines
2.7 KiB
C++

/*
* 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 __BVH_H__
#define __BVH_H__
#include "bvh/bvh_params.h"
#include "util/util_array.h"
#include "util/util_types.h"
#include "util/util_vector.h"
CCL_NAMESPACE_BEGIN
class BoundBox;
class BVHNode;
class BVHParams;
class Device;
class DeviceScene;
class Geometry;
class LeafNode;
class Object;
class Progress;
class Stats;
#define BVH_ALIGN 4096
#define TRI_NODE_SIZE 3
/* Packed BVH
*
* BVH stored as it will be used for traversal on the rendering device. */
struct PackedBVH {
/* BVH nodes storage, one node is 4x int4, and contains two bounding boxes,
* and child, triangle or object indexes depending on the node type */
array<int4> nodes;
/* BVH leaf nodes storage. */
array<int4> leaf_nodes;
/* object index to BVH node index mapping for instances */
array<int> object_node;
/* Mapping from primitive index to index in triangle array. */
array<uint> prim_tri_index;
/* Continuous storage of triangle vertices. */
array<float4> prim_tri_verts;
/* primitive type - triangle or strand */
array<int> prim_type;
/* visibility visibilitys for primitives */
array<uint> prim_visibility;
/* mapping from BVH primitive index to true primitive index, as primitives
* may be duplicated due to spatial splits. -1 for instances. */
array<int> prim_index;
/* mapping from BVH primitive index, to the object id of that primitive. */
array<int> prim_object;
/* Time range of BVH primitive. */
array<float2> prim_time;
/* index of the root node. */
int root_index;
PackedBVH()
{
root_index = 0;
}
};
/* BVH */
class BVH {
public:
BVHParams params;
vector<Geometry *> geometry;
vector<Object *> objects;
static BVH *create(const BVHParams &params,
const vector<Geometry *> &geometry,
const vector<Object *> &objects,
Device *device);
virtual ~BVH()
{
}
protected:
BVH(const BVHParams &params,
const vector<Geometry *> &geometry,
const vector<Object *> &objects);
};
CCL_NAMESPACE_END
#endif /* __BVH_H__ */