[vtkusers] normals

[David Doria]

On Mon, Oct 24, 2011 at 11:22 AM, andon <antoniod987 at gmail.com> wrote:
> Could someone tell me what i obtain from normals?? when i extract normals i
> have a double array of 3 components, but what does this array contain?? what
> are these 3 numbers?? these normal are driving me crazy
> thank you all
> Antonio

A 'normal' is the direction orthogonal to the tangent plane of a surface.

http://en.wikipedia.org/wiki/Surface_normal

David