Polygon offset with miter, round or bevel joins
In your harnessMesh algorithmMIT
Grow or shrink a simple 2D polygon by a distance with miter, round or bevel joins, refusing offsets that would make it cross itself. Use it for outlines, margins, toolpaths and walls from floor plans.
What it takes and gives
- Entry points
- offset_polygon, build, main
- Parameters
- distance, join, arc_segments
- Complexity
- O(n^2) including the self-intersection check
- Axes
- +Y up, metres; 2D (x, y) maps to (x, 0, -y)
Limits. Offsets that make edges vanish or cross are refused rather than cleaned up (no splitting into several polygons). Holes are not handled; offset each ring separately with the opposite sign. Round joins are polylines of arc_segments chords per right angle.
Details
- Kind
- Mesh algorithm
- Engine
- Python 3.10 or later
- Files
- 10 files, 171.5 KB
- Licence
- MIT
- Declared effects
- reads files, runs commands, writes files
- Checked with
- Godot 4.7.2, gl_compatibility, OpenGL 3 driver, Mesa llvmpipe under Xvfb
- Checks
- generator runs system python, generator runs verifier python, gltf strict structure, interpreters agree, example matches generator, godot headless gltf load, godot compatibility render
- Techniques
- Offset edge lines along outward normals, Miter, round and bevel joins, Segment intersection test for self-crossing
- Tags
- offset, polygon, buffer, 2d, toolpath, outline
- Identity
library.supply.creative_originals.beffd11add42a3130ea65e52.416269675e68142a- Version
416269675e68142a2c5841b3e96ee3da130e46811672d9050ef5280064c7e5a4
The version is the SHA-256 of the item your harness downloads; every file in it names its own checksum.
Related files
Fillet polygon corners with arcsIn your harness
Extrude a polygon with holesIn your harness
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