[gameprogrammer] Re: need help with bullets....

On 4/14/05, Olof Bjarnason <olof.bjarnason@xxxxxxxxx> wrote:
> 
> Let F be the for ship position, and P be the player ship position.
> 
> 1. Find the vector from F to P and normalize it. (divide each
> coordinate it by the vector's length), call it A
> 2. Decide a speed for the bullet, BULLET_SPEED.
> 3. Each time you update the shot, add A*BULLET_SPEED to the current
> position of the shot
> 
> To normalize a vector A=3D(x,y), you do
> 
> length =3D sqrt(x*x + y*y);
> x /=3D length;
> y /=3D length;
> 
> This kind of math is called Vector Algebra and you're gonna read a lot
> of it at college / uni.. Or beforehand which is more fun :)
> 
> 
weird... last time before i post my question, i have try this vector based 
solution and what i get is, the bullet stay put or else just going to the 
top of the window....
but know... it's fine.... i guess i have miss something here. but thx 
Olof....
guess it's my fault for not good at math since high school :p

-- 
Ade Anom A
[http://www.a3rex.info]



---------------------
To unsubscribe go to http://gameprogrammer.com/mailinglist.html

Other related posts: