Hi again all. Many thanks to you that helped me on the set distance movement problem i had, now a new one I''m trying to make an actor jump, using this formula: a = a + (Cos(b) * (0.01 * T)) * b where: a = the total jump (in height) so far b = the height the jump has to reach T = time now, It''s half working. it seems the player does this in the jump: /\ not: .-. if that makes any sense. Any help would be greatly appreciated.

Well he should jump following a parabolic path rather than a cosine...

I''d use the formulae for motion with constant acceleration...

a = a

v = u + at (u = velocity at t=0), integrate above equation to get this result

r = ut + 0.5 * a * t * t

where r is the relative displacement from time t. Again, it''s the integral of the equation above.

Use the third formula, with a constant downwards (negative) acceleration (9.81 m/s or whatever). Set off with a velocity u (upwards) and then apply the 3rd equation until r becomes negative (under the floor). Bingo, and Newton would be happy.

"Most people think, great God will come from the sky, take away everything, and make everybody feel high" - Bob Marley

Thanks shifter, I''m a little when you say stuff like this though:

"v = u + at (u = velocity at t=0)"

when you say "at", what exactly do you mean?

He''s saying the initial velocity.

No, when he says "at" he really means a*t, where ''t'' is the time increment from the moment that the object had velocity ''u'' and ''a'' is the acceleration (assumed constant).

Cheers,

Timkin