Hi,
You can't cast Shape3D to OBJModel, since OBJModel doesn't extend Shape3D
Picking is a well-known use case of a HashMap. You could have a HashMap<Shape3D, OBJModel>. But there has to be a better way...
.................(coding....)...................
Okay, I just did a class for you, org.xith3d.utility.general.NodeMap.
IT'S IN THE TOOLKIT but in case you don't use SVN version here's the source :
/**
* A Node Map.<br>
* <br>
* Useful in picking, for example :<br>
* <code>NodeMap<OBJModel> map = new NodeMap("obj");</code><br>
* Each time you create a pickable OBJ Model :<br>
* <code>map.prepare(model);</code><br>
* You have a PickResult, want your OBJ model back</br>
* <code>OBJModel model = map.get(pickResult.getShape3D());<br>
* Then you can do whatever you want with it !<br>
*
* @author Amos Wenger (aka BlueSky)
*/
public class NodeMap<T extends NodeGroup> {
String id;
/**
* Create a new NodeMap
* @param id The ID which will be used when storing
* the data in Nodes. If you have several NodeMap(s)
* on same objects, have different IDs
*/
public NodeMap(String id) {
this.id = id;
}
@SuppressWarnings("unchecked")
public void prepare(T group) {
prepare(group, group);
}
@SuppressWarnings("unchecked")
public void prepare(T group, Object object) {
List<Node> nodes = group.getChildren();
for (Node node : nodes) {
node.setUserData(id, object);
if(node instanceof NodeGroup) {
prepare((T)node, object);
}
}
}
@SuppressWarnings("unchecked")
public T get(Node node) {
return (T) node.getUserData(id);
}
}
Note : not tested yet, but should be right.
General Category
