[vtk-developers] vtkCamera and 0.0002

[Robert M.O'Bara]

Hi All,

vtkCamera enforces the policy that the distance between the camera 
position and the focal point always be >= 0.0002.  Besides the fact 
that having them be the same would be a bad thing, is there any other 
justification for this?  The problem I'm seeing is that my entire scene 
might fit in a sphere of radius 0.0001 which would make dollying the 
camera useless.

I was wondering if this should be something that the user could set 
since he/she would know the scale of the scene being looked at.

Also, when this limit is violated the behavior is to move the focal 
point so the distance is 0.0002, perhaps a better thing to do is 
nothing - don't change the camera at all and perhaps in debug mode put 
out message stating that happened.

Comments?


Robert M. O'Bara, MEng.
Senior Software Engineer

Simmetrix Inc.
10 Halfmoon Executive Park Drive
Clifton Park, NY 12065

Phone (518) 348-1639 x-104