Determine winding of a 2D triangles after triangulation

Question

I\'m using triangulation code that works pretty well (it processes polygons with holes and integrates with JTS) but apparently it doesn\'t respect the winding of triangles. Some

Answer 1

For a triangle A B C, you can find the winding by computing the cross product (B - A) x (C - A). For 2d tri's, with z=0, it will only have a z component.

To give all the same winding, swap vertices C and B if this z component is negative.