[vtkusers] vtkPolygon::PointInPolygon 's parameters

[rashedk]

Hi everyone, 

I cant find any reference in the documentation about the parameters of the
static function vtkPolygon::PointInPolygon

Here is the signature: 
int 	PointInPolygon (float x[3], int numPts, float *pts, float bounds[6],
float n[3])

Especially with regards to the 4th parameter bounds[6]. If I have four
corner points of a polygon (i.e. plane) for example, how do I compute
bounds? Are these the min-max of each x,y,z component for the four corner
points? 

Thanks, 
Rashed
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