Re: [Pipmak-Devel] A strange behaviour: visualization bug or what?

[Christian W. <cwa...@gm...>]

Andrea Viarengo wrote:
> Why the rectangular patch (the third) doesn't cut circles exactly half? But it seems moved back?

Let me guess: The rectangle does cut the circles in half. But you're 
using an extremely large field of view and therefore have lots of 
perspective distortion.

Try placing your eye so close to the screen that you actually see it 
under the field of view that you've set the camera to, and you'll see 
that the cylinder looks perfectly normal.

Or try zooming in the camera as far as it will go (5 degrees) and move 
the scene farther away in the y direction so you still see all of it.

> The attached picture is shown what I would have expected ....

You'd expect that with an orthographic camera, or in the limit of FOV -> 
0 for a perspective camera.

  -Christian