A very simple bouncing ball. Add a friction variable to control the bounce. The friction force is there to make the y velocity gradually loses it momentum and eventuall the bounce will come to an end.
Friction can be adjust through the slidebar.
import Vector;
var velocity:Vector=new Vector(0,0); var gravity:Vector=new Vector(0,.3); var friction:Number=.7;
function bounce():Void{
// add gravity to velocity to create acceleration
velocity.plus(gravity);
ball._x+=velocity.vx;
ball._y+=velocity.vy;
if(ball._y-Stage.height>-ball._width/2){
ball._y=Stage.height-ball._width/2;
// reverse the y velocity, and lose momentum
velocity.reset(velocity.vx,-velocity.vy*friction);
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