// check for move out of bounds
private Vector getBounce(Dimension bounds) {
final double IMPULSE_MAGNITUDE = 2;
int tolerance = 10;
Vector impulse = new Vector();
if (getLeft() < tolerance) {
impulse = new Vector(RIGHT_DIRECTION, IMPULSE_MAGNITUDE);
} else if (getRight() - tolerance > bounds.width) {
impulse = new Vector(LEFT_DIRECTION, IMPULSE_MAGNITUDE);
}
if (getTop() < tolerance) {
impulse = new Vector(DOWN_DIRECTION, IMPULSE_MAGNITUDE);
} else if (getBottom() - tolerance > bounds.height) {
impulse = new Vector(UP_DIRECTION, IMPULSE_MAGNITUDE);
}
impulse.scale(getMyMass());
impulse.scale(getVelocity().getRelativeMagnitude(impulse));
return impulse;
}
/**
* ******************************************************************************* 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();
}
}
/** Use the given force to change this mass's acceleration. */
public void applyForce(Vector force) {
Vector scaled = new Vector(force);
scaled.scale(1 / myMass);
myAcceleration.sum(scaled);
}
public void applyVescosity(Mass m) {
Vector vescoForce = new Vector(m.getVelocity());
vescoForce.scale(myViscosity);
vescoForce.negate();
m.applyForce(vescoForce);
}
public void applyGravity(Mass m) {
Vector g = new Vector(getMyGravity());
g.scale(m.getMyMass());
m.applyForce(g);
}