Commit Graph

4 Commits

Author SHA1 Message Date
Aras Pranckevicius
389d770bf4 Fix #122256, #123862: OBJ import Clamp Size option issues
- #122256: Clamp Size option did not work at all, due to mesh
  bounding box still not being calculated (and was firing an assert
  in Debug build).
- #123862: Clamp Size option was rounding the resulting scale to
  powers of ten, which is not what anyone would expect.

This fixes both issues, and adds test coverage.

Co-authored-by: dshot92 <dshot92@gmail.com>
Pull Request: https://projects.blender.org/blender/blender/pulls/139145
2025-05-20 11:57:42 +02:00
Mattias Fredriksson
bc0913240f Fix: Improve Obj importers parsing and detection of NURBS knot mode
Reworks the implementation for how knots are interpreted when importing
NURBS in .obj format. It refactors each test into a separate function
and simplifies functions using a 'multiplicity sequence' which counts
repeated occurances of knot values (or their 'multiplicity'). Making
comparisons simpler, clearer, and with improved correctness.

With regard to regression tests behavior is almost the same, noticable
difference is consideration of cyclic. Allowing curves with multiplicity
at the endpoints to be cyclic (so Bezier curves can be cyclic given
one repeated point). Untested behavior may also have been 'refined'
(changed), but additional tests would be needed to identify those cases.

Pull Request: https://projects.blender.org/blender/blender/pulls/138778
2025-05-16 15:44:38 +02:00
Mattias Fredriksson
d0cf7dd8b5 Fix: Improve OBJ NURBS IO, support exporting custom knots
Corrects behavior with NURBS knot values in .obj exporter. Knot values
denoting the curve parameter range and values at the boundary region
in the span ends had hardcoded knot values. It also implemented its own
knot calculation, which is not ideal...

Importer is updated to not try to second guess the knot values.
Not entirely sure what it was trying to do but it used wrong indices
and missed writing the end of the knot vector. Combined the changes
should make it possible to import and export a simple NURBS curve with
custom knots and leaving it intact.

This replaces some of the erronous behavior using functions from [new]
Curves implementation. Mixing new and legacy curve implementation is not
ideal but exporter is exporting POLY curves as NURBS while legacy method
does not support computing the knot vector. To avoid introducing
additional branch cases nor update legacy functions, using the new
functions seems to be the correct choice. These functions should be
functionally equivalent but is not identical (e.g. legacy curve returns
knots in [0, 1] range). It should also make it easier to transition to
exporting new Curves.

Pull Request: https://projects.blender.org/blender/blender/pulls/138732
2025-05-12 16:51:21 +02:00
Sergey Sharybin
bbfc97ad6f Move tests/data and assets to the main repository
This change moves the tests data files and publish folder of assets
repository to the main blender.git repository as LFS files.

The goal of this change is to eliminate toil of modifying tests,
cherry-picking changes to LFS branches, adding tests as part of a
PR which brings new features or fixes.

More detailed explanation and conversation can be found in the
design task.

Ref #137215

Pull Request: https://projects.blender.org/blender/blender/pulls/137219
2025-05-05 15:10:22 +02:00