Nightly : bug in vtkCamera::GetFrustumPlanes

[John Biddiscombe]

Nightly Download Wed 6th Oct.

in...
void vtkCamera::GetFrustumPlanes( float aspect, float planes[24] )

Zooming in on a model sometimes causes Div by zero

The computation of the planes normal can throw a wobbly when 
t = sqrt((a*a) + (b*b) + (c*c)) 
and t=0

next division causes problems.

Haven't looked at fixing it, but just thought I'd mention it.

John B







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