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  Recreating a bouncy ball effect in Java  (Read 855 times)
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Offline Hendrick

Junior Newbie





« Posted 2007-05-28 08:27:17 »

Hi,

does anyone know how to recreate the bouncy ball effect in this game (Tangerines):

http://www.kontraband.com/show/show...rating=nsfw_sfw


The most I can do at the moment is Pong-like rebounds off the wall...

Kind regards,

Hendrick
Offline Bad Sector

Senior Newbie





« Reply #1 - Posted 2007-05-28 09:16:56 »

I think something like
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// Ball.java
class Ball
{
    public static final double GRAVITY = 6.0;

    public double x, y; // position vector
   public double vx, vy; // velocity vector

    public Ball(double x, double y, double vx, double vy)
    {
        this.x = x;
        this.y = y;
        this.vx = vx;
        this.vy = vy;
    }

    public move(double seconds)
    {
        x += seconds*vx;
        y += seconds*vy;
        if (somehow_collide_with_something)
        {
            x = collision_point_x; // that would be the same as x for floors
           y = collision_point_y; // that would be the floor's height for floors
           vx = reflection_of_vx_on_surface; // that would be the same as vx for floors
           vy = reflection_of_vy_on_surface; // that would be -vy on floors
       }
        vy += seconds*GRAVITY;
    }
}


or something like that (i would begin with something like the above and move forward modifying that).
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