fix(polygon): Add extra checks to avoid ZeroDivisionErrors

ladybug-tools · Mar 23, 2023 · 14f43fa · 14f43fa
1 parent 649f787
commit 14f43fa
Show file tree

Hide file tree

Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/ladybug_geometry/geometry2d/polygon.py b/ladybug_geometry/geometry2d/polygon.py
@@ -606,17 +606,22 @@ def offset(self, distance, check_intersection=False):
         # loop through the vertices and get the new offset vectors
         init_verts = self._vertices if not self.is_clockwise \
             else list(reversed(self._vertices))
+        init_verts = [pt for i, pt in enumerate(init_verts) if pt != init_verts[i - 1]]
         move_vecs, max_i = [], len(init_verts) - 1
         for i, pt in enumerate(init_verts):
             v1 = init_verts[i - 1] - pt
             end_i = i + 1 if i != max_i else 0
             v2 = init_verts[end_i] - pt
             if not self.is_clockwise:
                 ang = v1.angle_clockwise(v2) / 2
+                if ang == 0:
+                    ang = math.pi / 2
                 m_vec = v1.rotate(-ang).normalize()
                 m_dist = distance / math.sin(ang)
             else:
                 ang = v1.angle_counterclockwise(v2) / 2
+                if ang == 0:
+                    ang = math.pi / 2
                 m_vec = v1.rotate(ang).normalize()
                 m_dist = -distance / math.sin(ang)
             m_vec = m_vec * m_dist

diff --git a/ladybug_geometry/intersection2d.py b/ladybug_geometry/intersection2d.py
@@ -71,7 +71,7 @@ def intersect_line2d_infinite(line_ray_a, line_ray_b):
 
     Args:
         line_ray_a: A LineSegment2D or Ray2D object.
-        line_ray_b: ALineSegment2D or Ray2D that will be extended infinitely
+        line_ray_b: A LineSegment2D or Ray2D that will be extended infinitely
             for intersection.
 
     Returns: