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lengths along a set of points. This can be used for the sample curves
node, or finding new points along a curve when extending
or shrinking it.
This commit uses it in the snake hook brush as an example.
The logic is similar to the uniform length sampling, but the next
sample length is retrieved from the input instead of multiplication.
For the sample node in the future, though this sort of sampling can be
potentially done more efficiently for specific curve types besides
poly curves, it's simpler, at least as a start, to work on a set of
evaluated points that can be treated like a poly curve.
Differential Revision: https://developer.blender.org/D14571
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Add "for_write" on function names that retrieve mutable data arrays.
Though this makes function names longer, it's likely worth it because
it allows more easily using the const functions in a non-const context,
and reduces cases of mistakenly retrieving with edit access.
In the long term, this situation might change more if we implement
attributes storage that is accessible directly on `CurvesGeometry`
without duplicating the attribute API on geometry components,
which is currently the rough plan.
Differential Revision: https://developer.blender.org/D14562
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This implements the spherical brush and different falloff
modes for the Snake Hook brush.
Differential Revision: https://developer.blender.org/D14408
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Rename "size" variables and functions to use "num" instead,
based on T85728 (though this doesn't apply to simple C++
containers, it applies here). Rename "range" to "points" in
some functions, so be more specific.
Differential Revision: https://developer.blender.org/D14431
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This makes it easier to work on these brushes in parallel.
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