/**
* ******************************************************************************* addMarker
*
* <p>This method is responsible for adding crumbs to the handler and determining when crumbs
* should become invisible. Right now, crumbs are removed once there are more than 20 markers in
* the handler. Crumbs are removed according to when they were placed on the manifold by the user.
* *******************************************************************************
*/
public void addMarker(ManifoldPosition mp) {
ManifoldPosition pos = new ManifoldPosition(mp);
Vector vec = new Vector(pos.getDirectionForward());
vec.scale(-.25);
pos.move(vec);
Marker m = new Marker(pos, crumb, Marker.MarkerType.FIXED);
trail.add(m);
markers.addMarker(m);
counter++;
int numMarkers = trail.size() - 1;
if (numMarkers >= 5) {
Marker toRemove = trail.poll();
toRemove.flagForRemoval();
}
}
