Quote:Original post by matches81
but we don´t have anything like stereo view on a screen anyway?

We have! The nVidia GPU Programming Guide has a whole chaper about this.
They have a stereo driver, what you can find in the Drivers section. They recommend glasses like this: i-glasses, but you can use an ordinary red-blue glass too.

kp

I made a quick study on the effect of tweaking the FOV parameter for the standard projection matrix. The following images all show exactly the same screen with different FOV angles.



Even with the 90 degrees fov the effect is noticable. When you look at the sails for example, these are parallel to eachother, but because of the wide angle the 'distorted' perspective is already there. With increasingly larger angles, this distortion becomes more and more prominent.

I don't know if this is the effect you are after, but the 164 degrees FOV gives a nice result without any extra code and only a small performance decrease. If you'd want accurately recreate the FOV for non-hunter animals, you'll probably have to use two camera's using the 164 degrees (or higher) FOV and render this on the left and right halves of the screen. From the 164 deg shot though, I'd say it's doable but probably quite queasiness inducing ;)

Just a quick remark : the DirectX fovs are only HALF fovs. So when you wrote 45° on your screenshot, you were in fact using a 90° fov ^^

Thanks for the remark! Finally them frustrum pictures in those books are starting to make sense :)

Well, then I guess you're done with using Math.PI/1.1 for your perspective matrix for the basic effect. There's still depth/perspective in the shot, but it is so distorted it could very well pass for the non-hunter FOV.