Sorry your browser is not supported!

Hi!, it's me again!

well, I'm having a problem with limbs...the problem is that the player is driving a tank, and it can rotate the turret and fire. The problem is when I make my bullet. I'm using some of the "matrix alignment" code of the Limit Rush game. Anyway when I create my bullet, I use:

Alright, it orientates to the object, but if my tank is going down on a hill and I rotate my turret 180º, the bullet goes down...
When the turret is created, I attach it to a object...like a limb, sorta like that...

It always happen...¿what's going on?. Anyway if anyone wants the full code I can put it here, but I advise, the code isn't too commented, so you'll have to figure out how things work...sorry for that. The code is only 1039 lines...it's small?

Well, see ya

Try using your own orientation system, might make it easier to control it, and actually orientate it to the correct direction.

Somethign along the lines of:



Note, that isn't tested, and not guarenteed, you might have to play with the newy values to get it right (if you change it to newy = Object Position Y(obj1), then you'll have the bullet fireing out horizontal to the X/Z axis, not takign into account the pitch of the turret ).

Hope I Helped...

In my potato gun simulator I have had good results doing the following. My gun barrel has two small hidden spheres linked to either end of the barrel. My projectile is a seperate object, a small sphere that is normally hidden. When the fire key is pressed, the projectile is positioned in the barrel, unhidden, and then I do the following:

The projectile is tracked with 6 variables:
Position: ppx#, ppy#, ppz#
and Velocity: pvx#, pvy#, pv#

Using the two spheres linked to the barrel, I get the direction vector of the barrel by subtracting the positions of the spheres. I normalize the vector and multiply by the assumed muzzle velocity to get the initial velocity vector for the projectile.

Then each update I get the delta time from the last update, dt#. This can either be assumed from the framerate or use the timer. Then the projectile's position is:

ppx#=ppx#+pvx#*dt#
ppy#=ppy#+(pvy#+0.5*gee#*dt#)*dt#
ppz#=ppz#+pvz#*dt#

pvy#=pvy#+gee#*dt#

position object obj, ppx#, ppy#, ppz#

then check for collisions, hitting the ground, trailing smoke, etc.

gee# is gravity in the y direction (i.e. -9.8 for 1 world unit = 1 meter)

This method can easily be adapted to incorporate air resistance and/or wind. Unfortunately, the spud gun simulator is currently down as I tried to replace the simple cannon made from DB primitives with a nicely modelled cannon. Frankly the models kicked my butt, and I gave up to work on something else for awhile.