• Advertisement

Archived

This topic is now archived and is closed to further replies.

complex polygon winding

This topic is 6461 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

I have a list of vertices that represent a complex polygon (can be concave or convex, but not self intersecting) lying on the z-plane does anybody know of an algorithm to determine whether it''s winding is counterclockwise or clockwise just from the list of vertices? thanks!

Share this post


Link to post
Share on other sites
Advertisement
One simple way of doing this is (for each polygon): calculate the centre of the vertices, calculate the polar angle from the centre out to each vertex, then check the order of the polar angles.

Anygood?

Matt



Check out my project at: www.btinternet.com/~Matthew.Bennett

Edited by - 3dmodelman on June 15, 2000 4:02:57 PM

Edited by - 3dmodelman on June 15, 2000 6:35:56 PM

Share this post


Link to post
Share on other sites

  • Advertisement