Look at physics.cpp in my code. What you can find there:
- 3D point - segment distance checking algo
- 3D point - triangle distance checking algo (I've disabled some parts of it)
- checking for collision with map (looping through triangles using algo above)
- collision algo with bouncing and friction based on velocity toward plane
- function for rotating ship based on time delta
- function allowing applying force to specific point of ship (not very well done and unused)
- function handling hover engines (unused)
- function handling ship movement (advanced sections commented out)
- function converting forward/up vectors to heading/pitch/roll angles

Ship is described as position/forward/up/velocity and angular velocity vectors which is way less limiting than heading/pitch/roll angle set.

Additionally, allstuff.h has tVector code with some basic vector operations.

A bit complex, but works nice. Unfortunately I was forced to change my idea since I couldn't make physically correct model of hovering aircraft and I had to make simpler model without gravity.

Bruce Perry : As for air resistance, keep in mind that it is only an experimental law, which is only an approximation and is valid only in specific conditions. In fact, at low velocities, the frictional force created by a fluid like air is proportional to the velocity itself ( F = -lambda*v in vectors ), but at high velocities, a force proportional to the velocity squared is a better model.

Then maybe F = -lambda * (gamma * v)^(beta * v + 1) ?

. The very first thing I did after I was able to get into a graphics mode was to mess around with particle physics. That someone could have already made their own games before messing around with physics really amazes me!

My SpeedHack entry actually uses some pretty complicated rigid body dynamics (plr_physics.c,jnts.c and paths.c I think). The code's in a mess though :p. If you know what my code is usually like, then you can imagine what my speedhack code is like....

Bruce Perry: I meant [edit] the force applied by kinetic energy [/edit]. Isn't this kinetic force proportional to the speed multiplied by resistance?

Yeah, that's how I implemented it

Now I remember what I did. The kinetic force is the force that preserves the movement. The friction force is then a force inverse to the kinetic force multiplied by the friction coeficient (>=1). However, in my game, the mass of all objects is 1, so it end up that the friction force is proportional to the speed.

You are not alone. I guess AllegroGL version they compiled our entries with was the buggy version since James Howard's game doesn't run for me too. I'd suggest using CVS version of AllegroGL.

Thanks! Your was great too - best I've tried so far but I guess to difficult for me.

btw. What gfx card do you have? Mine is GeForce 2 and requires hacked version of AllegroGL to run.

Does your system support opengl properly? (ie allegrogl)

Has anyone else played my game yet? I'm quite proud of it, as it was the first time I had written and polished a game in such a short period of time. I'd be greatful of any comments.
You can download windows binaries here

I haven't had a chance to try all the games yet. My favourites so far are the pirate game, the hippy's trip and the raycaster one (forgotten its name)

edit: Krzysztof I can't play your game. It needs fmod.dll to run, which I then googled for and downloaded but now it just opens a window and then closes it again with no error message. I prob got the wrong DLL file or something. Where can I get a working one?

I guess it does since my entry is OpenGL one. Binary you've posted works well. Really nice game although some extra map features would be nice.

Also ImLeftFooted's binary from winbin archive doesn't work for me - probably AllegroGL again.

I thought of adding extra levels but I ran out of time trying to tweak the AI. I could post the map editor if you're interested.

edit:

thanks I thought your game was pretty damn good, although its frustrating as hell when you get sent back to the beginning if you fail a level. Those damn bees! 2 thumbs up!
I got a copy of the fmod dll and can now play krzysztof's game. A bit hard to control at first but I love the graphics. Nice lighting effects!

AFAIK AllegroGL version 0.2.0 or 0.2.2 had some problems with some gfx cards (eg. mine).