/**
* Update local information from the scene. It's important that this method is synchronized
* because we get ConcurrentModificationException's during rendering otherwise.
*
* <p>This method is called from sceneChanged().
*/
protected synchronized void updateCharges(Scene theScene) {
// Clear cached infos.
cachedBounds = null;
cachedWire = null;
charges.clear();
setPositive = null;
setNegative = null;
// Get all selection sets.
Object layersObj = theScene.getMetadata("selectionsPlugin.selectionSets");
if (layersObj == null) return;
if (!(layersObj instanceof ArrayList)) return;
ArrayList<ObjectSet> layers = (ArrayList<ObjectSet>) layersObj;
// Try to find those which are of interest for us.
for (ObjectSet set : layers) {
if (set.getName().equals(setNamePositive)) {
setPositive = set;
} else if (set.getName().equals(setNameNegative)) {
setNegative = set;
}
}
// Create charges.
if (setPositive != null) {
for (ObjectInfo oi : setPositive.getObjects(theScene)) {
if (oi.getObject() instanceof Sphere) {
Sphere s = (Sphere) oi.getObject();
double q = s.getRadii().x;
Vec3 pos = oi.getCoords().getOrigin();
charges.add(new SphereCharge(pos, q));
}
}
}
if (setNegative != null) {
for (ObjectInfo oi : setNegative.getObjects(theScene)) {
if (oi.getObject() instanceof Sphere) {
Sphere s = (Sphere) oi.getObject();
double q = -s.getRadii().x;
Vec3 pos = oi.getCoords().getOrigin();
charges.add(new SphereCharge(pos, q));
}
}
}
}
@Override
public void sceneChanged(ObjectInfo info, Scene scene) {
updateCharges(scene);
scene.objectModified(this);
}