protected void initSimulator(ForceSimulator fsim) {
// make sure we have force items to work with
TupleSet t = (TupleSet) m_vis.getGroup(m_group);
t.addColumns(ANCHORITEM_SCHEMA);
t.addColumns(FORCEITEM_SCHEMA);
Iterator iter = m_vis.visibleItems(m_nodeGroup);
while (iter.hasNext()) {
VisualItem item = (VisualItem) iter.next();
// get force item
ForceItem fitem = (ForceItem) item.get(FORCEITEM);
if (fitem == null) {
fitem = new ForceItem();
item.set(FORCEITEM, fitem);
}
fitem.location[0] = (float) item.getEndX();
fitem.location[1] = (float) item.getEndY();
fitem.mass = getMassValue(item);
// get spring anchor
ForceItem aitem = (ForceItem) item.get(ANCHORITEM);
if (aitem == null) {
aitem = new ForceItem();
item.set(ANCHORITEM, aitem);
aitem.location[0] = fitem.location[0];
aitem.location[1] = fitem.location[1];
}
fsim.addItem(fitem);
fsim.addSpring(fitem, aitem, 0);
}
}
public void clear() {
// System.err.println("run clear");
ForceSimulator fsim = getForceSimulator();
fsim.clear();
// make sure we have force items to work with
TupleSet t = (TupleSet) m_vis.getGroup(m_nodeGroup);
Iterator iter = m_vis.visibleItems(m_nodeGroup);
while (iter.hasNext()) {
VisualItem item = (VisualItem) iter.next();
if (!item.canGet(ANCHORITEM, ForceItem.class)) break;
// get force item
ForceItem fitem = (ForceItem) item.get(FORCEITEM);
if (fitem != null) {
fitem.location[0] = (float) item.getEndX();
fitem.location[1] = (float) item.getEndY();
fitem.mass = getMassValue(item);
// get spring anchor
ForceItem aitem = (ForceItem) item.get(ANCHORITEM);
// only reset if an anchor exists
if (aitem != null) {
aitem.location[0] = fitem.location[0];
aitem.location[1] = fitem.location[1];
fsim.addItem(fitem);
fsim.addSpring(fitem, aitem, 0);
}
}
}
}
