With this change baking jobs will be aborted faster. The user will not have to wait for the current frame to finish baking. The bake job will exit early and discard the incomplete frame.
This option existed already and was just hidden in the UI. With the new fluids system though, it will only be used for rendering - and not to optimize the cache.
Since the bounding boxes are now also being used for effector objects, there needs to be a better name for them. Instead of calling them EmissionMap, which caters only to emission objects, they will now be called FluidObjectBB.
- Use 'BKE_object_defgroup' prefix for object functions.
- Rename 'defvert_verify_index' to 'defvert_ensure_index'
since this adds the group if it isn't found.
This commit adds bounding box support for emission objects - similarly to flow objects. Before, each effector object had to iterate over the entire domain. Bake times of scenes with multiple obstacles improved significantly with this optimization.
Other improvements that were implemented alongside the bbox feature:
- Option for subframe sampling for effector objects
- Option to enable / disable effectors (can be animated)
- Optimization for static objects. If a flow or effector object does not move and the adaptive domain is not in use, the bake time will be optimized further by reusing the flow / effector grids from the previous frame (no recalculation).
Various fixes for smoke / fire flow objects:
- Apply inflow at every subframe (new: also emit during adaptive steps in between frames)
- Fix issue with fire not being emitted on first frame
- Higher value range for smoke flow density variable
Fluid guiding functionality was broken in the bake / read cache loop in fluid.c. Committing this to the release branch as otherwise fluid guiding would not have worked as expected (i.e. not at all).
Cache files are currently loaded via the Manta Python API. With very big caches this can slow down the viewport playback. Especially smoke simulations, which just load grids and no meshes, can suffer from this. This fix solves this problem by directly loading the cache files from disk (no Python). This fix has been in the works for some time. The developer of this patch is ready to handle any potential fall-out of this patch quickly.
This is a small optimization that makes sure the adaptive domain only considers active inflow objects. Ones with disabled fluid flow are skipped and thus the adaptive domain will not try to cover them.
Added sanity check in the flow / obstacle object loops that check if the modifier data is valid. Ideally this should not be needed. However, in remove_particle_systems_from_object() the fluid modifier can get freed. It is not yet clear whether the modifier free call is really needed or not.
This commit cleans up the flow emission code (i.e. the code that determines where flow is generated). It also addresses an issue with initial velocities.
Related issues (that might be fixed through this commit) are: T73422, T72949
- Initial velocities are no longer influenced by surface distance value.
- Added optimizations for different flow types (e.g. skip part of loop for liquid flow objects).
- Comments style cleanup and removed old todos.
This code is currently not in use and so removing it based on the YAGNI principle. If there really is need for a high-res emission loop it could be easily added again. However, I believe for the smoke noise it is sufficient to upscale the base emission map. A high-res emission map can easily be achieved by increasing the base resolution. Note also that in the new fluid system base loop and noise loop are decoupled making the need for a high-res emission loop even more unneccessary.
Cache file loading for mesh and particle files now works through the direct update_structures functions. The final cache mode now also only bakes the most essential files and is therefore not resumable anymore.
