Hi, I'm developing an application to pick up individual objects in a scenegraph which
is converted from a loaded VRML file. I have no difficulty for the initial pick. But
after I changed the scene(reset or load another new one), there is a problem to pick.
I have checked my code, and am sure that I've added the updated scene branch group to
the newly added pick canvas, the updated BranchGroup is alive,and I set the capability
of the nodes in the updated scenegraph this way:
PickTool.setCapabilities( (Node) sg, PickTool.INTERSECT_FULL );
to allow picking.
The errors I got like this:
java.lang.IllegalStateException: Picking can only work if BranchGroup is alive
at javax.media.j3d.BranchGroup.pickAll(BranchGroup.java:123)
at
com.sun.j3d.utils.picking.PickTool.pickGeomAllSortedIntersect(PickTool.java:835)
at
com.sun.j3d.utils.picking.PickTool.pickGeomClosestIntersect(PickTool.java:915)
at com.sun.j3d.utils.picking.PickTool.pickClosest(PickTool.java:566)
Does anybody know what might cause the problem? Thank you very much in advance!!!
Yi
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