[vtkusers] vtkCamera focal distance
cafaro at dis.uniroma1.it
Wed Sep 17 13:58:58 EDT 2014
hope someone can help:
I use vtk 5.8 and i'm tryng to get the K matrix for the vtkCamera, as
defined in Hartley and Zisserman:
alpha_x s p_x
K = alpha_y p_y
I know it is based on the OpenGL camera, so i already gave a look to:
However i am not interesed in setting a particular value for the alpha_x
and alpha_y, but only in retrieving their values, as the i need to
reproject some points which are not in the renderer, in the same camera,
for postprocessing. What i need is to know the alpha_x and alpha_y
values, also with p_x and p_y.
For what i have understood in the previous posts i should use
where aspect=window_width/window_eight and ranges come from
the result i get is this:
2.79904 0 0 0
0 3.73205 0 0
0 0 -1000.02 -10.0001
0 0 -1 0
but i'm almost sure there is something wrong.
Dip.to Ingegneria informatica, automatica e gestionale "Antonio Ruberti"
Università "La Sapienza"
Via Ariosto, 25
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