testXYPolygonTurningDirections MethodStatic
Test the direction of turn at the vertices of the polygon, ignoring z-coordinates.
- For a polygon without self intersections, this is a convexity and orientation test: all positive is convex and counterclockwise, all negative is convex and clockwise
- Beware that a polygon which turns through more than a full turn can cross itself and close, but is not convex
- Returns 1 if all turns are to the left, -1 if all to the right, and 0 if there are any zero or reverse turns
testXYPolygonTurningDirections(pPointArray: Point2d[] | Point3d[]): number
| Parameter | Type | Description |
|---|---|---|
| pPointArray | Point2d[] | Point3d[] |
Returns - number
Defined in
Last Updated: 13 June, 2024