FPS Camera - Warped?

Darklance · Post by **Darklance** » Mon Jul 12, 2004 4:57 am

I'm sure many of you have noticed this, but the default Irrlicht FPS camera is really warped.

I think this has something to do with the FOV, but I'm not sure how to change it....I've read the (confusing) documentation, and it refers to a "setFOV" function, but I can't figure out how to use it.

Since I'm fairly new to graphics programming and haven't touched C++ in a long time, I figured it would be best to ask here.

Little help?

thesmileman · Post by **thesmileman** » Mon Jul 12, 2004 5:12 am

The documentation I can assure you is quite good for Irrlicht. If you do not believe me take a look at source for several other open source projects.

Tyn · Post by **Tyn** » Mon Jul 12, 2004 11:33 am

For the most part it is good, yes, although there are a few typo's and things that aren't totally clear. This could be one of them ( although doing a search in the forums would easily have helped you ).

It is measured in degrees, which the docu doesn't say, as well as AFAIK it being set to 45 degrees by default ( I am pretty sure this is correct, I don't know why it says it defaults to PI/3.5f although someone else might know ). Try setting it to 90 degrees to lessen the fish eye effect.

bal · Post by **bal** » Mon Jul 12, 2004 12:24 pm

Tyn wrote:Try setting it to 90 degrees to lessen the fish eye effect.

I did and indeed, now the camera behaves like a "real" FPS camera. But it's just like it is zoomed in.

http://irrlicht.sourceforge.net/phpBB2/ ... ght=camera for pictures ...

Lonewolf · Post by **Lonewolf** » Mon Jul 12, 2004 1:22 pm

Try 60. That should be about right.
Setting it higher creates that zoom effect which is exactly what you would want for a sniper rifle or binoculars

Tyn · Post by **Tyn** » Mon Jul 12, 2004 3:17 pm

Hmm, I use a top down camera so I've never really noticed that zoom effect. Good to know

bal · Post by **bal** » Mon Jul 12, 2004 7:58 pm

Weird, if I use 60 or 80 or maybe others too, the view is rotated, scaled and the mousemovements are odd (left = right and vice versa, up = under and vice versa).

Darklance · Post by **Darklance** » Tue Jul 13, 2004 2:05 am

OK, solved the problem....it was easy, as you guys pointed out. Thanks!

For some reason, it appears that a FOV of 90 in software windowed mode has a strange "zoom" effect, as mentioned, but FOV 90 in DirectX 8 fullscreen mode works just fine.

thesmileman · Post by **thesmileman** » Tue Jul 13, 2004 2:17 am

bal wrote:Weird, if I use 60 or 80 or maybe others too, the view is rotated, scaled and the mousemovements are odd (left = right and vice versa, up = under and vice versa).

That would lead me to believe the field of view is behind the camera so the camera is rotated the oppoiste direction. I would imagine it thinks it is pointing the correct direction so moving left would appear to be moving right exc.

Who knows but that is what it sounds like to me. Bug maybe?

Asterisk Man · Post by **Asterisk Man** » Wed Jul 14, 2004 6:33 pm

The FOV uses radians, so PI/3.5 should be equal to +/- = 51 degrees

If you want 90 degrees in you FOV, simply use PI/2. (3.1415f/2.0f)