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Small tweaks to make labels and texts more correct, consistent and
polished.
Reviewed by: Aaron Carlisle, Julian Eisel
Differential Revision: https://developer.blender.org/D8346
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Conflicts:
source/blender/editors/gpencil/gpencil_primitive.c
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Surface Emission
Changing the surface distance through the flow type is inappropriate here. It had been added to ensure that liquids / smoke use a different emission value.
Now the value will only be changed when changing from a gas to a liquid emitter or, vice-versa, when changing from a liquid to a gas emitter.
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A collection of multiple changes that had been living in my stash:
- Use nullptr instead of NULL in C++ files
- Removed unused/deprecated functions from headers
- Cleared animatable flag in cache UI
- Comment cleanups
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simulation
New option that lets users the define the maximum number of fluid particles that will be allowed in the simulation. This can come in handy, for example, to ensure that the particle count will not exceed the hardware capabilities, or to avoid excessive amounts of particles in a scene.
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simulation
New option that lets users the define the maximum number of fluid particles that will be allowed in the simulation. This can come in handy, for example, to ensure that the particle count will not exceed the hardware capabilities, or to avoid excessive amounts of particles in a scene.
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This refactor is in response to reports in which the adaptive domain with noise caused a crash (e.g. T79009). It should also fix issues where the smoke appeared to be cut off when using the adaptive domain together with noise. It is also possible that some of these changes improve the lines issue from T74559.
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Particles section.
Moved fluid simulation reset to separate functions based on type.
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Changed variable names from mmd, mds, mfs, and mes to fmd, fds, ffs, and fes. The author of this commits lights a candle for all the merge conflicts this will cause.
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Added an offset field to control when to load the simulation files. Since this is a very small but helpful addition it is in my view safe to commit at this point of the bcon cycle.
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This commit makes uses of the new OpenVDB IO in Mantaflow (introduced in 781f783a66ac).
From now on, fluid cache files in OpenVDB format will contain a list of grids per frame (before: one .vdb file per grid per frame). Besides regular grids, particle systems are also stored using OpenVDBs PointGrid data structures.
All older cache formats will remain fully functional:
- Uni caches (.uni) files are still available from the UI and can be used as before
- Raw caches (.raw) are no longer available from the UI, but loading them is still possible
- Old OpenVDB caches (one .vdb per grid) can no longer be baked either, but loading them is still possible.
It is also no longer possible to choose file formats for 'Noise' and 'Particles'. Instead there are now options to set the file format for 'Volumetric' and for 'Mesh' data.
Known issues (planned to be resolved soon):
- OpenVDB files are currently not taking into consideration the clipping value (FluidDomainSettings). Empty cells are therefore being written too. Depending on the scene, this can make file sizes unnecessarily large.
- Domains are not being exported at their world position. Instead they are always clipped to the origin.
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between fluid types
When switching to gas, the fluids were not actually destroyed, leading to
the situation that they were then destroyed when actually switching to
liquid.
Maniphest Tasks: T77264
Differential Revision: https://developer.blender.org/D7907
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Reviewers: sebbas
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Reviewers: sebbas
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Refactored setup that converts from Blender to Mantaflow units.
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Domain size parameter no longer needed (unsed right now). Domain size is directly taken from object.
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When using the 'Replay' cache mode the cache needs to be invalidated whenever simulation variables have been changed.
The invalidation will always only affect the according subcaches, e.g. when changing a mesh paramter only the mesh cache will be invalidated, the base cache will remain intact.
Before this change Blender always invalidated the entire cache.
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mantaflow when clicking the left arrow
Added nore flexibility to cache frame range and ensured validity of frame range.
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Planar object now have a thickness by default. This should make it more intuitive for users as there is no need to specify an object thickness.
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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.
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This is more in line with standard grids and means we don't have to make
many special exceptions in the upcoming change for arbitrary number of volume
grids support in Eevee.
The workbench shader was also changed to fix bugs where squared density was
used, and the smoke color would affect the density so that black smoke would
be invisible. This can change the look of smoke in workbench significantly.
When using the color grid when smoke has a constant color, the color grid
will no longer be premultiplied by the density. If the color is constant
we want to be able not to store a grid at all. This breaks one test for
Cycles and Eevee, but the setup in that test using a color without density
does not make sense. It suffers from artifacts since the unpremultiplied
color grid by itself will not have smooth boundaries.
Differential Revision: https://developer.blender.org/D6951
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The issue of T72253 was that the density threshold (RNA adapt_threshold) was considering cells as empty cells too early and thus also shrinking the domain too early. The fix for this is to use smaller threshold values for the adaptive domain. This fix gives more flexibility in the UI to do just that.
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For optimization purposes these settings need to be enabled explicitly from now on.
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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).
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Simple checkbox that - if enabled - will tell the solver to clear density or liquid particles in obstacle cells.
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Fix typo in fluid RNA.
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Removed scientific variable names from UI.
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More descriptive names for secondary particle options.
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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
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Cleaned up some inconsistencies in the UI, i.e. corrected name for velocity factor and fixed UI visibility for fractional obstacle parameter.
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Use OpenVDB by default, smaller particle radius to avoid volume increase, and shorter names for combined fluid particle systems.
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UI updates include:
- More descriptive tool tips
- Removed texture panel for liquid flow objects
- Adjusted alignment for some smoke / fire parameters
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Fluid domains with (auto-generated) particle systems were set to wireframe drawtype automatically. This was a convenience feature that made particles visible immediately. As the auto switching is sometimes a bit annoying though this has been removed. Instead, the Quick Liquid Operator switches the viewport shading type to wireframe.
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The combined export was using the old flag format.
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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.
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