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GPv3: Fix outline modifier edge cases #119084

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Lukas Tönne merged 2 commits from LukasTonne/blender:fix-gp3-outline-keep-shape into main 2024-03-05 11:57:47 +01:00
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Lukas Tönne commented 2024-03-05 11:54:57 +01:00
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Fixes behavior of the outline modifier in some edge case:

  • When the outline radius gets larger than the input stroke radius it
    caused a negative offset, inverting the outline in thin areas like the
    tips of the default stroke. The offset should always remain positive
    or zero (collapses onto the input curve).
  • When the outline collapses the modifier was skipping points on outside
    corners, where at least one point should be added in all cases.
Fixes behavior of the outline modifier in some edge case: - When the outline radius gets larger than the input stroke radius it caused a negative offset, inverting the outline in thin areas like the tips of the default stroke. The offset should always remain positive or zero (collapses onto the input curve). - When the outline collapses the modifier was skipping points on outside corners, where at least one point should be added in all cases.
Lukas Tönne added 2 commits 2024-03-05 11:55:07 +01:00
0179db6d09 Clamp radius offset to avoid insetting beyond the center line. 
This happens where the input stroke is thin and the outline has a larger
radius than the input stroke.
9ecfe86827 Fix skipped points when the stroke is very thick. 
When the outline stroke thickness is increased the perimeter collapses
onto the input stroke due to the "keep shape" feature. In this edge case
the `add_corner` function was skipping points. It should always add at
least one point.
Lukas Tönne added this to the Grease Pencil project 2024-03-05 11:55:10 +01:00
Lukas Tönne requested review from Falk David 2024-03-05 11:55:36 +01:00
Falk David approved these changes 2024-03-05 11:56:27 +01:00
Lukas Tönne merged commit 01f794a7d5 into main 2024-03-05 11:57:47 +01:00
Lukas Tönne deleted branch fix-gp3-outline-keep-shape 2024-03-05 11:57:50 +01:00
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