To find negative normals and change to pozitif

[Baram]

Hello Friends,

 

How can I find negative normals of a geometry and reverse them to positive with vop operation,

 

Thank you for your help

 

Baram,

[davpe]

Hi,

 

not sure how you can do it in VOPs but it is easily possible with Clean SOP > Orient Polygons

 

D.

[acey195]

if you want to specifically want to do the operation in vops, you can compare

 

the cross product (of the normalized vector (of the previous vertex to current vertex position, in the primitive) and the normalized vector( of current vertex position to the next vertex position in the primitive))

 

if the dot product between (this cross product) and (the normal)) is smaller than 0, you need to flip the normal.

 

it could be I got the input ordering backwards, but that should be easy to figure out.

[Baram]

Thank you guys,

 

i will give a try, but probably will be difficult to set up in vop for me. if you have a time please do hip file

 

cheers

 

B