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Fix #123918: STL exporter does not reverse faces for mirrored objects #124219

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Aras Pranckevicius merged 2 commits from aras_p/blender:stl_mirrored_fix into blender-v4.2-release 2024-07-05 11:08:33 +02:00
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Aras Pranckevicius commented 2024-07-05 10:41:05 +02:00
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Old python STL exporter, as well as other exporters like OBJ,
reverse the face order when object being exported has odd number
of negative scales in the matrix. The C++ STL exporter was lacking
that, resulting in the exported object looking "inside out".

The extra branch inside triangle export inner loop has no measurable
performance impact, probably because it is entirely predictable.

Old python STL exporter, as well as other exporters like OBJ, reverse the face order when object being exported has odd number of negative scales in the matrix. The C++ STL exporter was lacking that, resulting in the exported object looking "inside out". The extra branch inside triangle export inner loop has no measurable performance impact, probably because it is entirely predictable.
Aras Pranckevicius added 1 commit 2024-07-05 10:41:15 +02:00
Fix #123918: STL exporter does not reverse faces for mirrored objects
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6c3d67f43f 
Old python STL exporter, as well as other exporters like OBJ,
reverse the face order when object being exported has odd number
of negative scales in the matrix. The C++ STL exporter was lacking
that, resulting in the exported object looking "inside out".

The extra branch inside triangle export inner loop has no measurable
performance impact, probably because it is entirely predictable.
Aras Pranckevicius commented 2024-07-05 10:42:22 +02:00
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@blender-bot build

@blender-bot build
Aras Pranckevicius added 1 commit 2024-07-05 11:07:40 +02:00
Aras Pranckevicius merged commit b238df312d into blender-v4.2-release 2024-07-05 11:08:33 +02:00
Aras Pranckevicius deleted branch stl_mirrored_fix 2024-07-05 11:08:40 +02:00
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Reference: blender/blender#124219
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