Mobility models for ad-hoc networks

Column model

The '+' simbol denotes the gravity center.
The '.' points are the reference locations of the nodes.
The "0" node is the target point, it is not animated.
Click with the mouse to move the column  toward this position.

public static Pos move_column(int node) { // move a node in column model
    // Move semi_random the node requested, with the limitations of the model
    Pos p=(Pos)loc.get(new Integer(node)); // real position
    Pos r=(Pos)ref.get(new Integer(node)); // theoretic position
    double d=p.distance(r);
    int xi=(int)(Math.random()*(d+5));
    int yi=(int)(Math.random()*(d+5));
    if (p.isLeft(r)) xi+=p.x; else xi=p.x-xi;
    if (p.isUp(r)) yi+=p.y; else yi=p.y-yi;
    return new Pos(xi,yi);
}

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Miguel Sanchez 1998