Jump to content
  • Advertisement
Sign in to follow this  
clapton

Vertex normal ??

This topic is 5153 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

Hello I can't figure out what does 'vertex normal' mean. What's a use of it? It seems obvious that surface normal points a direction the surface is facing but how can a vertex point in any direction? I am little confiused about it. Thanks for your help!

Share this post


Link to post
Share on other sites
Advertisement
The vertex normal can be the same as a face normal, but it needn't be. Think of a sphere-mesh, for instance. The triangles are "flat" and their normals point in one direction. Multiple faces may (and do) share vertices. These vertices will have a normal different from that of any one of the faces they're assigned to. In this case, the vertex normal wil be the (normalised) average of the normals of the faces the vertex is a part of.

Share this post


Link to post
Share on other sites
A vertex normal is a surface normal (usually). It simply happens to be evaluated on the surface, but at the location of the vertex. Kippesoep's sphere example is a good one.

Share this post


Link to post
Share on other sites
Thanks for replies. :)

OK, I understand. Could you tell me some examples where 'vertex normals' are used in practice?

Share this post


Link to post
Share on other sites
Sign in to follow this  

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

We are the game development community.

Whether you are an indie, hobbyist, AAA developer, or just trying to learn, GameDev.net is the place for you to learn, share, and connect with the games industry. Learn more About Us or sign up!

Sign me up!