I'm making this gravity script but the objects just keep jumping higher and higher all the time, and I cant find a solution to the problem. Here is the script: ---------------------------------------------------------------------------- ------------------ property spriteNum, x, y, Vx, Vy, Ax, Ay, dTime, gravity, dragC on getPropertyDescriptionList me set pdlist to [:] addprop pdlist, #dTime, [#comment:"Speed or time increasement.", #format:#float, #default:1] addprop pdlist, #Vx, [#comment:"Initial horizontal speed...", #format:#float, #default:0] addprop pdlist, #Vy, [#comment:"Initial vertical speed...", #format:#float, #default:0] addprop pdlist, #gravity, [#comment:"Gravity", #format:#float, #default:1] addprop pdlist, #dragC, [#comment:"Air resistance", #format:#float, #default:0] return pdlist end getPropertyDescriptionList on beginSprite me set x = float(the locH of sprite spriteNum) set y = float(the locV of sprite spriteNum) end on exitFrame me if the locV of sprite me.spriteNum > 230 then set Vy = -Vy if the locV of sprite me.spriteNum < 0 then set Vy = -Vy if the locH of sprite me.spriteNum > 310 then set Vx = -Vx if the locH of sprite me.spriteNum < 0 then set Vx = -Vx -- find the new values for set Ax = -dragC * Vx set Ay = gravity - dragC * Vy -- find the changes in velocity set dVx = Ax * dTime set dVy = Ay * dTime -- find the changes in position set dx = Vx * dTime set dy = Vy * dTime -- set the new velocities and position set Vx = Vx + dVx set Vy = Vy + dVy set x = x + dx set y = y + dy -- and now move the sprite to the -- calculated x and y position set the loc of sprite spriteNum = point(x,y) end ---------------------------------------------------------------------------- ------------- Please help me... Johannes Hansen [To remove yourself from this list, or to change to digest mode, go to http://www.penworks.com/LUJ/lingo-l.cgi To post messages to the list, email [EMAIL PROTECTED] (Problems, email [EMAIL PROTECTED]) Lingo-L is for learning and helping with programming Lingo. Thanks!]
