Raydium 3D Game Engine

Permission to commit a few changes over 2d capture:

-I have fixed the jpeg capture function (it was capturing with TGA format file).
-Added a new raydium_capture_frame_jpeg_auto () That captures automatically the frame but coding it in jpeg format, without asking name.
-Added and updated some doc (in capture.h)

Good point for the raydium_capture_frame_jpeg() bug !
For the jpeg_auto, you use the same "filename format" as raydium_capture_frame_auto() ? If yes, it's probably a good idea to move all the gmtime() stuff in another function so we don't duplicate it. Something like "void raydium_capture_filename_auto(char *dest)" perhaps ?

about the gmtime() i have think :
-should be better to have the screenshots in a split folder like screenshots/ or captures/, but i have no idea of how to make folders in win32
- the captures could have the following format:
raycap1.jpg
That 1 will be a incremental counter.
That way have a problem, if you launch the game a second time, the new captures will erase the older ones, so we can do a previous scan in the capture flder to see the last number...

Anyway, i don't have clear what's the problem with gmtime() ? And duplicate two gmtime strings is quite difficult...

There's no problem! It's just that you'll probably need to duplicate this code (string generation) in both functions. (I like to have the date of the capture on the filename)