void wander() {
float wanderR = 10.0f; // radius for our "wander circle"
float wanderD = 20.0f; // distance for our "wander circle"
wandertheta += random(-1, 1); // randomly changet wander theta
// now we have to calculate the new location to steer towards on the wander circle
Vector3D v = vel.copy();
v.normalize(); // our heading
float xoff =
wanderD * v.x() + wanderR * cos(wandertheta); // x spot on circle based on heading
float yoff =
wanderD * v.y() + wanderR * sin(wandertheta); // y spot on circle based on heading
Vector3D target = Vector3D.add(loc, new Vector3D(xoff, yoff)); // add the location
acc.add(steer(target, false)); // steer towards it
}
// function to display
void render() {
ellipseMode(CENTER);
noStroke();
fill(0, 100, 255, timer);
ellipse(loc.x(), loc.y(), r, r);
}