Module offset_geometry 

Offset / buffer geometry operations.

Provides algorithms for:

• Polygon offset via Minkowski sum approach (inward/outward)
• Curve offset (equidistant curves for polylines)
• Fillet (rounding interior corners)
• Chamfer (beveling corners)
• Rounded rectangles generation
• Minkowski sum / difference for convex 2-D shapes
• Morphological operations (erosion, dilation, opening, closing)
• Tubular neighborhoods (thickening of curves/surfaces)

Structs

Point2

A 2-D point / vector.

Functions

chamfer_polygon

Apply a chamfer (bevel) at each vertex of a polygon.

ensure_ccw

Ensure polygon is in CCW order.

fillet_polygon

Apply a fillet (arc rounding) at each vertex of a polygon.

is_convex

Check if a polygon is convex.

minkowski_difference_convex

Minkowski difference of two convex polygons.

minkowski_sum_convex

Minkowski sum of two convex polygons (both assumed CCW).

morphological_closing

Morphological closing: dilation followed by erosion.

morphological_dilation

Dilate a polygon by radius (outward offset).

morphological_erosion

Erode a polygon by radius (inward offset).

morphological_opening

Morphological opening: erosion followed by dilation.

point_in_polygon

Point-in-polygon test (ray casting).

point_in_tubular

Check if a point is within distance d of a polyline.

point_to_segment_distance

Compute the distance from a point to a line segment.

polygon_area

Absolute area.

polygon_centroid

Centroid of a simple polygon.

polygon_offset

Offset a simple polygon by distance.

polygon_offset_3d

Offset a 3-D polygon (planar) by distance along edge normals.

polygon_offset_round

Polygon offset with arc joins at convex corners.

polygon_perimeter

Perimeter of a polygon.

polyline_offset

Offset an open polyline by distance.

rounded_rectangle

Generate a rounded rectangle polygon.

signed_area

Signed area of a simple polygon (positive = CCW).

tubular_neighborhood

Generate a tubular neighborhood (thickened polyline).