/**
* Adds the given edge to those to be displayed in the viewer. Note that the edge must connect
* nodes that have already been added to the viewer. This version will use the locations of the
* two nodes to calculate their distance of separation.
*
* @param edge Edge to add to the display.
* @return True if edge was added successfully. False if edge contains nodes that have not been
* added to the viewer.
*/
public boolean addEdge(E edge) {
Particle p1 = nodes.get(edge.getNode1());
if (p1 == null) {
System.err.println("Warning: Node1 not found when creating edge.");
return false;
}
Particle p2 = nodes.get(edge.getNode2());
if (p2 == null) {
System.err.println("Warning: Node2 not found when creating edge.");
return false;
}
// Only add edge if it does not already exist in the collection
if (!edges.containsKey(edge)) {
float x1 = p1.position().x();
float y1 = p1.position().y();
float x2 = p2.position().x();
float y2 = p2.position().y();
// Strength, damping, reset length
edges.put(
edge,
physics.makeSpring(
p1,
p2,
EDGE_STRENGTH,
DAMPING,
(float) Math.sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2))));
}
return true;
}
/**
* Adds the given edge to those to be displayed in the viewer. Note that the edge must connect
* nodes that have already been added to the viewer. This version will fix the distance of
* separation between nodes to the given value
*
* @param edge Edge to add to the display.
* @return True if edge was added successfully. False if edge contains nodes that have not been
* added to the viewer.
*/
public boolean addEdge(E edge, float distance) {
Particle p1 = nodes.get(edge.getNode1());
if (p1 == null) {
System.err.println("Warning: Node1 not found when creating edge.");
return false;
}
Particle p2 = nodes.get(edge.getNode2());
if (p2 == null) {
System.err.println("Warning: Node2 not found when creating edge.");
return false;
}
// Only add edge if it does not already exist in the collection
if (!edges.containsKey(edge)) {
// Strength, damping, reset length
edges.put(edge, physics.makeSpring(p1, p2, EDGE_STRENGTH, DAMPING, distance));
}
return true;
}