[vtkusers] Ray casting and intersection point

[Biddiscombe, John A.]

One thing to watch out for is that the ray start and ends are mapped to 0-1 and the intersection is always on the ray 0<=i<=1 somewhere. If you make the ray end very far away then the accuracy may be limited by the precision used. Try not to make the ray end millions of miles away - better to use some distance like 1.5 diagonal of dataset, then you know you aren't over compensating for the ray end.

JB
-----Original Message-----
From: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] On Behalf Of wingsneak
Sent: 17 March 2012 16:52
To: vtkusers at vtk.org
Subject: Re: [vtkusers] Ray casting and intersection point

Ok. Thank you, I manage to get it working !

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