(3D) What Are Normalos and how are they used?

[Vallan]

I'd try a little bit with Ogre and now I want to use Light and Shadow.
I did try it with a sample cube and found out that I have to set the "Normalos". Now is my question:

How can I use normalos,
and how do I calculate them,
and before everything What are normalos?

[traumatic]

normals


The following pages should clear some things up I hope:
http://www.euclideanspace.com/maths/alg ... /index.htm
http://www.euclideanspace.com/maths/alg ... /index.htm

[Vallan]

Thanks, I hope it helps.

[Vallan]

This did explain almost all. But how do I calculate the cross product in PB?

[Comtois]

May be this can help ?

http://purebasic.fr/english/viewtopic.php?t=11527

[traumatic]

This did explain almost all. But how do I calculate the cross product in PB?

Just like the article says

For example:

Code: Select all

Structure VECTOR3
  x.f
  y.f
  z.f
EndStructure 

Procedure VectorCross(*out.VECTOR3, *v1.VECTOR3, *v2.VECTOR3)
  *out\x = (*v1\y * *v2\z) - (*v1\z * *v2\y)
  *out\y = (*v1\z * *v2\x) - (*v1\x * *v2\z)
  *out\z = (*v1\x * *v2\y) - (*v1\y * *v2\x)
  ProcedureReturn *out
EndProcedure