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This updates fixes the following issues (critical for 2.92):
- Issue that prevented dense 'int' grids from being exported (incorrect clip value)
- Issue with particles outside out of domain bounds (position between -1 and 0) not being deleted
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Includes improvements for the file IO. Namely, more meta data will be written from now on.
This change is required to prevent IO issues (e.g. T84649) that arised through the use of sparse grids caching (introduced in 2.92).
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Fixes issue where files would not be written when 'resumable' option was checked.
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This update introduces two improvements from the Mantaflow repository:
(1) Improved particle sampling:
- Liquid and secondary particles are sampled more predictably. With all parameters being equal, baked particles will be computed at the exact same position during every bake.
- Before, this was not guaranteed.
(2) Sparse grid caching:
- While saving grid data to disk, grids will from now on be saved in a sparse structure whenever possible (e.g. density, flame but not levelsets).
- With the sparse optimization grid cells with a value under the 'Empty Space' value (already present in domain settings) will not be cached.
- The main benefits of this optimization are: Smaller cache sizes and faster playback of simulation data in the viewport.
- This optimization works 'out-of-the-box'. There is no option in the UI to enable it.
- For now, only smoke simulation grids will take advantage of this optimization.
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Switched from NULL to nullptr.
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Updated files includes:
- Fix for smoke / fire emission from particles
- Custom precision for liquid particles when saving in OpenVDB format
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Among code cleanups, this update includes a new flood-fill helper function for levelsets.
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New files contain updated sampling function (support for maximum number of particles cap).
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No longer including unused dependencies. Should numpy IO be needed at some point, the Manta source update script can be configured so that the required dependencies are included again.
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New files include fixes for obj mesh import and minor cleanups.
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Kudos to brecht for noticing the issue
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This updated set of Mantaflow files includes the improved OpenVDB file IO. With this update it is finally possible to store multiple grids per file. It is also possible to save particle systems and particle data to OpenVDB files.
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Updates include:
- A fix from Jacques that changed the loop order in the mesh creation function (the fix speeds up the function significantly due to fewer cache misses).
- Some of the grid copy helper functions are now multithreaded.
- A fix for Windows file IO. Now it possible to load files with non ASCII characters on Windows too.
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Needs more consideration. This fixes compilation for now.
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Updates in the files include:
- New manta files now use an platform independent gzopen function
- Adjusted argument name for vorticity
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Includes the OpenVDB read/write functions for int grids. This essential for the resume bake functionality in modular fluid caches.
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The memory leak described in T72498 has been fixed in Mantaflow, the updated files should reflect this in Blender.
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Added missing resize for vector that holds vert velocities
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Includes preprocessed Mantaflow source files for both OpenMP and TBB (if OpenMP is not present, TBB files will be used instead).
These files come directly from the Mantaflow repository. Future updates to the core fluid solver will take place by updating the files.
Reviewed By: sergey, mont29
Maniphest Tasks: T59995
Differential Revision: https://developer.blender.org/D3850
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