/**
* Tethers the given node to its location with the given strength.
*
* @param node The node to be tethered.
* @param strength Strength of the tether.
* @return True if the viewer contains the given node and it was tethered successfully.
*/
public boolean tether(N node, float strength) {
Particle p1 = nodes.get(node);
if (p1 == null) {
return false;
}
// Grab the tethering stake if it has already been created, otherwise create a new one.
Particle stake = stakes.get(node);
if (stake == null) {
stake = physics.makeParticle(1, node.getLocation().x, node.getLocation().y, 0);
stake.makeFixed();
stakes.put(node, stake);
}
// Grab the tether if it has already been created, otherwise create a new one.
Spring tether = tethers.get(stake);
if (tether == null) {
tether = physics.makeSpring(stake, p1, strength, DAMPING, Float.MIN_VALUE);
tethers.put(stake, tether);
} else {
tether.setStrength(strength);
}
return true;
}
/**
* Adds a node to those to be displayed in the viewer.
*
* @param node Node to add to the viewer.
*/
public void addNode(N node) {
Particle p = physics.makeParticle(1, node.getLocation().x, node.getLocation().y, 0);
nodes.put(node, p);
}