Using PickTool

Hi,
I am trying to use PickTool for an application that uses a 3d virtual environment. However, when I pick an object, and acquire the SceneGraphPath from the PickResult, I almost always end up with the same Shape3D object when I print it out to standard out. I'm wondering if the PickTool is returning the Shape3D of the entire scene that I am displaying, or just one small shape3D of the entire scene?
Also, the other peculiar thing is that the SceneGraphPath has no intermediate nodes, it only returns the locale and the terminal node.
Any suggestions how to retrieve the full scene graph pathway?

As for your first question, I'm not quite sure myself,
but on your last I think I can help:
You have to set the capability "ENABLE_PICK_REPORTING"
for every Branch/TransformGroup that is supposed to show
up in the SceneGraphPath - otherwise it will be ignored.
See also:
http://java.sun.com/products/java-media/3D/forDevelopers/J3D_1_3_API/j3dapi/javax/media/j3d/Node.html#ENABLE_PICK_REPORTING
Happy Coding... ;-)

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Collision prevension using picking

Hi everybody:
i am working on a java 3d game demo which uses picking as the collision avoidance utility.the code below is quite simple but in fact it cant pick anything. the problem has made me crazy for quite a long time and i still not find out the correction answer.if anyone could solve this problem ,i will be very thankful~ :)
public class TestBound extends Applet {
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root.compile();
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setLayout(new BorderLayout());
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createBranchGraph();
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su.addBranchGraph(root);
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TestBound tb = new TestBound();
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PickTool tool = new PickTool(tb.root);
tool.setShapeRay(new Point3d(1000,0,0),new Vector3d(-1,0,0));
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the picking ray should intersect with the color cube,but in fact it cant pick anything and returns null always.

When you post code, please use[code] and [/code] tags as described in Formatting Help on the message entry page. It makes it much easier to read.

Picking distand objects with PickTool

hi,
I have a succesfully implemented a PickTool which allows me to pick objects. BUT my problem is, that it only seems to work on close objects and not on distant objects.
    PickTool picker = new PickTool(thebranch);
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I've had the same problem myself, but it turned out that I couldn't pick objects that were too close either.
The problem is the fact that I was not accounting for the aspect.
Essentially, if you draw a pickRay straight ahead from the image plate, the bloody thing will not go in the direction of the mouse click on the canvas (bastard!).
So, I had to do some weird maths using the field of view (FOV) of the current canvas to find the proper angles of diversion and hence, the actual direction of my mouse click.
Anywho, the thing that led me to discover this was: I coded up a quick debug-tool that would actually draw my pickRay in 3d space. This allowed me to see where I was actually pointing. Only when I got a single point visible for every click and not a long line did I see that I had gotten it right.
Well, anywho, it worked for me and seems to be pretty accurate.

PickTool with PickBounds object

I've run into what seems to be a stumbling block for what I'm working on. I'm writing a 3D viewer for post processing of finite element models (basically a viewer of simple 3D objects, points, lines, squares, etc...). The objects will be defined by the appropriate arrays (LineArray, TriangleArray, etc...).
What I need to do is give the user the ability to pick multiple objects that lie within a user defined rectangle (or better yet, a general polygon).
The problem I have is PickTool will not return intersection data when using a PickBounds object as stated by the JavaDoc for PickTool. I was going to use a BoundingBox for the picking region, but I cannot determine which specific graphic objects have been picked. Only the particular array in which they're contained because of the lack of intersection data.
Is there another way I can do this? Or a way to resolve the problem I describe in the preceding paragraph?
Any suggestions are appreciated. TIA
Talon

Yes, that's the problem I ran into. I guess my real question would be, is there a way to get around this limitation if I need to use a rectangular/polygonal region for picking?
One way to get around this is to put each object in a separate geometry array, but this chews up incredible amounts of memory when there are tens of thousands of geometry objects.
I obviously also could write all of the picking code myself, which I may end up doing, but it would be nice to use the existing classes for this.
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