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Fix #104842: Incorrect cyclic curve parameter node factor #105079

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Hans Goudey wants to merge 3 commits from HooglyBoogly:fix-curve-parameter-cyclic into blender-v3.5-release
pull from: HooglyBoogly:fix-curve-parameter-cyclic
merge into: blender:blender-v3.5-release

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Hans Goudey commented 2023-02-22 16:48:00 +01:00
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66dda2b902 made an incorrect change to account for the special
case for NURBS. Instead, make the step that turns the lengths into
parameters more explicit, and pass the correct total length for each
curve, even in the cyclic case.

66dda2b902f0e2d1ee4 made an incorrect change to account for the special case for NURBS. Instead, make the step that turns the lengths into parameters more explicit, and pass the correct total length for each curve, even in the cyclic case.
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Hans Goudey added this to the 3.5 milestone 2023-02-22 16:48:00 +01:00
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Hans Goudey added 1 commit 2023-02-22 16:48:12 +01:00
580ba88a66 Fix #104842: Incorrect cyclic curve parameter node factor 
66dda2b902 made an incorrect change to account for the special
case for NURBS. Instead, make the step that turns the lengths into
parameters more explicit, and pass the correct total length for each
curve, even in the cyclic case.
Hans Goudey requested review from Jacques Lucke 2023-02-22 16:48:28 +01:00
Hans Goudey added this to the Nodes & Physics project 2023-02-22 16:48:34 +01:00
Hans Goudey commented 2023-02-22 16:49:09 +01:00
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The existing curve parameter test file needs to be updated when this lands. I'll also add the new one from #104842

The existing curve parameter test file needs to be updated when this lands. I'll also add the new one from #104842
Jacques Lucke approved these changes 2023-02-22 17:59:56 +01:00
source/blender/nodes/geometry/nodes/node_geo_curve_spline_parameter.cc
@ -83,1 +83,3 @@
static Array<float> calculate_point_lengths(const bke::CurvesGeometry &curves)
static Array<float> calculate_point_lengths(
const bke::CurvesGeometry &curves,
FunctionRef<void(MutableSpan<float> lengths, float total)> postprocess_fn)
Jacques Lucke commented 2023-02-22 17:59:06 +01:00
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Bit unconventional but seems ok with improved naming and comment. Maybe use total_curve_length and postprocess_lengths_for_curve.

Bit unconventional but seems ok with improved naming and comment. Maybe use `total_curve_length` and `postprocess_lengths_for_curve`.
Hans Goudey commented 2023-02-22 18:06:31 +01:00
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I thought going over the lengths with a single pass using a callback instead of two passes might improve performance. Didn't notice any difference though. It matches what's happening conceptually fairly well though at least. Thanks for the naming suggestions.

I thought going over the lengths with a single pass using a callback instead of two passes might improve performance. Didn't notice any difference though. It matches what's happening conceptually fairly well though at least. Thanks for the naming suggestions.
HooglyBoogly marked this conversation as resolved
Hans Goudey added 2 commits 2023-02-22 19:14:36 +01:00
Hans Goudey closed this pull request 2023-02-22 19:17:15 +01:00
Hans Goudey deleted branch fix-curve-parameter-cyclic 2023-02-22 19:17:24 +01:00

Pull request closed

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