Bugfix in rotation angle calculation when transforming arcs

Use arctan to properly account for quadrant of angle.
2024-06-09 18:00:09 -07:00 · 2024-06-09 18:00:09 -07:00 · 260a44ed2c
parent fcb648b9bb
commit 260a44ed2c
1 changed files with 1 additions and 1 deletions
--- a/svgpathtools/path.py
+++ b/svgpathtools/path.py
@ -334,7 +334,7 @@ def transform(curve, tf):
        new_radius = complex(rx, ry)

        xeigvec = eigvecs[:, 0]
-        rot = np.degrees(np.arccos(xeigvec[0]))
+        rot = np.degrees(np.arctan2(xeigvec[1], xeigvec[0]))

        if new_radius.real == 0 or new_radius.imag == 0 :
            return Line(new_start, new_end)