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Age	Commit message (Collapse)	Author
2021-07-05	Cleanup: unused variable	Jacques Lucke

2021-07-02	Fix T89581: Cycles crash rendering some OpenVDB files with inactive voxels	Brecht Van Lommel
	Print an error message instead.
2021-07-02	Cleanup: use template utility function to handle OpenVDB grid types in Cycles	Brecht Van Lommel

2021-04-01	Fix "unused variable" warning when compiling without nanovdb	Sebastian Parborg

2021-03-30	Cycles: disable NanoVDB for AMD OpenCL	Brecht Van Lommel
	It is causing issue with AMD OpenCL drivers, due to a potential driver bug. Ref T84461
2020-11-12	Cleanup: compiler warning	Brecht Van Lommel

2020-11-09	Cycles: Fix tricubic sampling with NanoVDB	Patrick Mours
	Volumes using tricubic sampling were producing different results with NanoVDB compared to dense textures. This fixes that by using the same tricubic sampling algorithm in both cases. It also fixes some remaining offset issues and some minor things that broke OpenCL kernel compilation on NVIDIA. Reviewed By: brecht Differential Revision: https://developer.blender.org/D9491
2020-11-04	Fix Cycles volume render differences with NanoVDB when using linear sampling	Patrick Mours
	The NanoVDB sampling implementation behaves different from dense texture sampling, so this adds a small offset to the voxel indices to correct for that. Also removes the need to modify the sampling coordinates by moving all the necessary transformations into the image transform. See also T81454.
2020-10-05	Cycles: Add NanoVDB support for rendering volumes	Patrick Mours
	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
2020-08-12	Fixes T77882: artifacts rendering OpenVDB volumes with multiple grids in Cycles	Kévin Dietrich
	The previous algorithm was not using all of the requested grids to build a mesh around the volume due to limitations regarding the use of a dense buffer to gather information about the volume's topology. This resulted in artefacts during rendering. The mesh generation is now done by merging all of the input grids and using the resulting grid's topology to create the mesh. The generation of the mesh is still done in index space as before, and the vertices are converted to object space by using the merged topology grid indexToWorld transform. To be able to merge the grids together we have to make sure that their transformation matrices and their index spaces match, thus, if they do not match we simply resample the grids. This behaviour should tackle one other limitation of the current algorithm, which is that only one transformation matrix was used to generate the final mesh. If we do not have an OpenVDB grid for the requested volume data, we generate a temporary OpenVDB grid for it. Differential Revision: https://developer.blender.org/D8401
2020-03-18	Cycles: support rendering new Volume object type	Brecht Van Lommel
	Voxels are loaded directly from the OpenVDB grid. Rendering still only supports dense grid, so memory usage is not great for sparse volumes, this is to be addressed in the future. Ref T73201