Edgedirection
From GMLwiki
e0:E → v:P3
[edit] Description
vector along edge e0 in faceCCW direction. Equals in effect to: ’ e0 faceCCW vertexpos e0 vertexpos sub ’
e0:E → v:P3
vector along edge e0 in faceCCW direction. Equals in effect to: ’ e0 faceCCW vertexpos e0 vertexpos sub ’