[Insight-users] info about tube spatial object

[Julien Jomier]

Hi Lorenzo,

The best way to compute normals and tangents to a TubeSpatialObject is 
to use the function ComputeTangentAndNormals() which specify the normals 
and tangent automatically from the centerline points.

If you want to specify the normals manually, in 2D you don't need to 
define the second normal. Normal2 is used only in 3D when defining a 
normal plane (specified by normal1 and normal2).
As you pointed out, normal1 and normal2 are two covariant vectors (not 
extremes of the same normal vector).

Hope that helps,

Julien

Lorenzo Cesario wrote:
> hi to all, i have a question about normal1 and normal2 used in tube spatial
> object algorithm. In what way can i choose values to give to these normals?
> and...normal1 and normal2 are vertices of two vectors or are extreme of the
> same normal vector? tks
> 
> 
> 
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