Angles

[PiCkstix]

If a ball were to hit a wall and bounce back, what would be the best formula to use?

eg. A ball hits a wall at 90 degrees, what formula would I use to give it the most realistic "bounce off" angle?

Thanks,
PiCk

 

[UndeadDragon]

Check out this vector system:

http://hilton.gw.oiccam.com/showthread.php?t=87027

 

[PiCkstix]

Ok I have figured out a simple way of doing SOME of the angles that lie towards a positive angle where you can just go Angle - 135' and it will work np.

For the other angles it seems very unusual and would need to use Angle + 135' which I am struggling to fit in...

I will check the link now...

EDIT: I am doing mine in GUI and to be honest, I hardly understand anything about JASS...
I am closing to a conclusion and might find this out but, any help will be nice...

 

[Waaaaagh]

velocity x/y tracking will help you so much here. Then, check for lack of pathability at little offsets, like (x+xspeed,y) and (x,y+yspeed), and if the first one isn't pathable, flip the x velocity, if the second isn't, flip the y velocity.