Currently, the polygon's normal is calculated as the normal of one of its triangles: normal_triangle([polygon.centroid, polygon.points[0], polygon.points[1]]). However, this is problematic when the polygon is simple but concave, because the first two points might be on the concave ears, as pointed out by the comments inside polygon.plane.
The compas.geometry.normal_polygon seem to offer a more robust method of calculating such normal, with O(n) instead of O(1) for calculating the normal.
Is it possible to incorporate such method into polygon.normal, since the code is already available in compas? Or let the user choose if they would sacrifice computation efficiency for more accurate handling with concave polygons?
Currently, the polygon's normal is calculated as the normal of one of its triangles:
normal_triangle([polygon.centroid, polygon.points[0], polygon.points[1]]). However, this is problematic when the polygon is simple but concave, because the first two points might be on the concave ears, as pointed out by the comments insidepolygon.plane.The
compas.geometry.normal_polygonseem to offer a more robust method of calculating such normal, with O(n) instead of O(1) for calculating the normal.Is it possible to incorporate such method into
polygon.normal, since the code is already available in compas? Or let the user choose if they would sacrifice computation efficiency for more accurate handling with concave polygons?