Patrick Mours
3df90de6c2
NanoVDB is a platform-independent sparse volume data structure that makes it possible to use OpenVDB volumes on the GPU. This patch uses it for volume rendering in Cycles, replacing the previous usage of dense 3D textures. Since it has a big impact on memory usage and performance and changes the OpenVDB branch used for the rest of Blender as well, this is not enabled by default yet, which will happen only after 2.82 was branched off. To enable it, build both dependencies and Blender itself with the "WITH_NANOVDB" CMake option. Reviewed By: brecht Differential Revision: https://developer.blender.org/D8794
69 lines
1.7 KiB
C++
69 lines
1.7 KiB
C++
/*
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* Copyright 2011-2020 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 __IMAGE_VDB__
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#define __IMAGE_VDB__
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#ifdef WITH_OPENVDB
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# include <openvdb/openvdb.h>
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#endif
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#ifdef WITH_NANOVDB
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# include <nanovdb/util/GridHandle.h>
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#endif
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#include "render/image.h"
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CCL_NAMESPACE_BEGIN
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class VDBImageLoader : public ImageLoader {
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public:
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VDBImageLoader(const string &grid_name);
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~VDBImageLoader();
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virtual bool load_metadata(ImageMetaData &metadata) override;
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virtual bool load_pixels(const ImageMetaData &metadata,
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void *pixels,
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const size_t pixels_size,
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const bool associate_alpha) override;
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virtual string name() const override;
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virtual bool equals(const ImageLoader &other) const override;
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virtual void cleanup() override;
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virtual bool is_vdb_loader() const override;
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#ifdef WITH_OPENVDB
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openvdb::GridBase::ConstPtr get_grid();
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#endif
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protected:
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string grid_name;
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#ifdef WITH_OPENVDB
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openvdb::GridBase::ConstPtr grid;
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openvdb::CoordBBox bbox;
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#endif
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#ifdef WITH_NANOVDB
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nanovdb::GridHandle<> nanogrid;
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#endif
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};
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CCL_NAMESPACE_END
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#endif /* __IMAGE_VDB__ */
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