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path docs: Clarify curvature

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The curvature of lines is zero, not infinite.
This commit is contained in:
Matthias Clasen 2023-08-24 11:13:08 -04:00
parent d873643407
commit ebd4ceca15
1 changed files with 5 additions and 2 deletions
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7
gsk/gskpathpoint.c
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@ -255,8 +255,11 @@ gsk_path_point_get_rotation (const GskPathPoint *point,
* Optionally, returns the center of the osculating circle as well.
* The curvature is the inverse of the radius of the osculating circle.
*
* If the curvature is infinite (at line segments), zero is returned,
* and @center is not modified.
* Lines have a curvature of zero (indicating an osculating circle of
* infinite radius. In this case, the @center is not modified.
*
* If curvature does not exist (at sharp turns), zero is returned and
* the @center is again not modified.
*
* <picture>
* <source srcset="curvature-dark.png" media="(prefers-color-scheme: dark)">