| 01-23-2007, 06:57 PM | #1 |
What kind of formula can I use to calulate a point in a curve using distance between points? I hope it's not too much of a question to ask. |
| 01-23-2007, 07:33 PM | #2 |
Well, pick a formula and evaluate it. Simple line: d = sqrt((targetx-startx)*(targetx-startx)) x = (targetx-startx)*v*t/d + startx y = (targety-starty)*v*t/d + starty z = 0 or some constant v = velocity Simple parabola: d = sqrt((targetx-startx)*(targetx-startx)) x = (targetx-startx)*v*t/d + startx y = (targety-starty)*v*t/d + starty z = -1/2g(t^2) + Vt + C (where g = gravitational constant, V = initial upwards velocity, and C = initial Z location, probably 0 or some constant). v = velocity Simple circle: x = r*cos(t*w) + centerx y = r*sin(t*w) + centery z = 0 or some constant w in both cases = angular velocity r in both cases = radius of the circle the unit moves along. If you want formulas without constant acceleration, I suggest taking a calculas orientated physics course. In all cases, t = the time elapsed since the start of the movement Keep in mind, evaluating these formulas often will be extremely slow, you'll want to calculate the derivatives of the functions and apply changes. Good luck! |
| 01-23-2007, 11:52 PM | #3 |
| 01-25-2007, 03:26 PM | #4 |
Hmm, i'm taking up physics soon so maybe it'll be a lot clearer then. TY i'll try these out. |