diff options
| -rw-r--r-- | lib/extensions/convert_to_satin.py | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/extensions/convert_to_satin.py b/lib/extensions/convert_to_satin.py index c666b625..cf292281 100644 --- a/lib/extensions/convert_to_satin.py +++ b/lib/extensions/convert_to_satin.py @@ -164,6 +164,13 @@ class ConvertToSatin(InkstitchExtension): # The dot product of two vectors is |v1| * |v2| * cos(angle). # These are unit vectors, so their magnitudes are 1. cos_angle_between = prev_direction * direction + + # Clamp to the valid range for a cosine. The above _should_ + # already be in this range, but floating point inaccuracy can + # push it outside the range causing math.acos to throw + # ValueError ("math domain error"). + cos_angle_between = max(-1.0, min(1.0, cos_angle_between)) + angle = abs(math.degrees(math.acos(cos_angle_between))) # Use the square of the angle, measured in degrees. |