[vtkusers] simple camera question

[Louis Desjardins]

ok nevemrind i just set my viewup vector and that solved it
thanks again!
LD


>From: "Louis Desjardins" <lost_bits1110 at hotmail.com>
>To: vtkusers at vtk.org
>Subject: [vtkusers] simple camera question
>Date: Wed, 14 Jul 2004 19:31:28 +0000
>
>Hi vtk users,
>
>Just a simple question
>
>Picture the y-axis coming out of the screen, the z axis going horizontal, 
>and the x axis being vertical
>
>When I do:
>
>Cam->SetPosition( 0.00001, 100, 10 );
>Cam->SetFocalPoint( 0, 0, 10 );
>
>I see my scene as I would expect, and I use the y-axis to determine how 
>close/far I am to the scene (since this is the axis coming out of the 
>screen for me)
>
>and I want to look at my scene straight-on, so the x values and z values of 
>both camera position and focal point should be the same, i.e i am just 
>changing the y-variable to control how close/far i am lookign from
>
>however if I set the x value of both camera position and focal point to be 
>the same (i.e. say I cahnged Cam->SetPosition( 0.00001, 100, 10 ) to 
>Cam->SetPosition( 0, 100, 10 ) ) then I see nothing!!
>however by adding something as small as 0.000001, everythign looks normal 
>again
>
>I don't get it?
>whats happening?
>thanks
>!!!!!!!!!!
>
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