Shooting objects: Problem with geometry assignment

Troubleshooting import-assets
1

Hi there,

i`m loading spatials via:
[java]
Spatial flashlight = assetManager.loadModel(“Models/flashlight/flashlight3.j3o”);
[/java]

Now i attach them to the rootNode and try to shoot them. I use this code for shooting inside the onAction-Method of the ActionListener-Class:
[java]
CollisionResults results = new CollisionResults();
Ray ray = new Ray(cam.getLocation(), cam.getDirection());
rootNode.collideWith(ray, results);

        for (int i = 0; i < results.size(); i++) {
            CollisionResult colRes = results.getCollision(i);
            String hit = colRes.getGeometry().getName();
            float distance = colRes.getDistance();
            System.out.println(hit);
            break;
        }

[/java]

Works fine so far! The Problem is that the spatial`s name (variable: hit) is “flashlight”. When i try to set the name of the spatial during import with “flashlight.setName(“SHOOTABLE_Flashlight”);” it has no effect. And when i cast it to Node and check all names of the Node-children, there is no child with the name “flashlight”.

Now the question: How can i set a Geometry name during asset import so i can see this name when i shoot it?

I need some kind of mapping here because some loaded spatials are wrapped by another class. This classes contain the spatial itself and some other information about this spatial. I want the name to map it to the class these geometry belongs to.

Thanks!

2

flashlight.setName(name);

3

no that does not work. assetManager.loadModel… returns a Spatial that is an instance of Node, not of Geometry. And in the collision result i get something of type geometry. So these two objects can not be the same ones.

4

If only there were some way to get the parent node… or to search the forum for a similar question that is posted two times a week… :wink:

2 Likes
5
@dano said: no that does not work. assetManager.loadModel.. returns a Spatial that is an instance of Node, not of Geometry. And in the collision result i get something of type geometry. So these two objects can not be the same ones.

You can set the name of any Spatial, whether it’s a Geometry or a Node. If the collision result is a descendant of the named node, you should be able to search rootward in the scene graph to find the named node, like so:
[java]
Spatial spatial = colRes.getGeometry();
while (spatial != null) {
if (spatial.getName().matches(pattern)) {
return spatial;
}
spatial = spatial.getParent();
}
return null;
[/java]

6

Most recently:
http://hub.jmonkeyengine.org/forum/topic/scene-graph-insanity/

7

Okay. you are right. works like a charm! it`s really late and my brain is almost empty =)

1 Like