Hi Allan,
On Wed, 2005-10-05 at 16:29 +0200, Allan Rasmusson wrote:
> Hi.
> I've been trying to get picking to work on an orthogonal projection
> using the camera->calcViewRay(...) function.
>
> I've tried using a matrix camera with the identity matrix as projection
> matrix and also the new orthogonal camera. What I believe is the problem
> is that neither the matrix camera nor orhogonal camera has reimplemented
> the calcViewRay() method.
thanks for the hint. I changed Camera::calcViewRay() to not implicitly
expect a perspective Camera. It should now work with every kind of
Camera (it does work with the OrthographicCamera).
> During my debugging of all this picking-stuff, I believe I found an
> ambiguity. The doc for camera->calcViewRay() states:
> "Calculate a ray that starts at the camera position and goes through the
> pixel /x/, /y/ in the viewport /port/. /x/ and /y/ are relative to the
> viewport's lower left corner."
>
> In the example "testPicking.cpp" which uses GLUT has (0,0) in the upper
> left corner however.
Good catch, that's a documentation bug. All the code actually uses the
upper left corner.
Thanks
Dirk
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