[SOLVED] Multiple parent nodes?

C++ coding using Panda3D
1

I’m using get_surface_point to get the point on a node, in the objects reference frame.
Here is some of the code.

NodePath node = entry->get_into_node_path();
LPoint3f pt = entry->get_surface_point(node.node());

And on the second line, every time I call it, I get this error message

:pgraph(warning): ModelRoot node has 2 parents; choosing arbitrary path to root.
:pgraph(warning): Chose: render/node

But everything still works ok. And when I run node.ls(), I only see one parent (of course?). Why am I getting this error? And how can I suppress it?

Thanks

2

It means node.node() (or one of its ancestors) has multiple parents–the node is instanced repeatedly in the scene graph.

To avoid this message, don’t use instancing.

Or, just use entry->get_surface_point(node), which is the correct way to call get_surface_point() anyway. You want to pass it a NodePath, not the PandaNode it references. A NodePath is by its nature unambiguous even in the presence of instancing, while a PandaNode is ambiguous.

The warning message is telling you that Panda internally made an arbitrary decision to resolve the ambiguity. It’s not necessarily a problem, but it means that the answer may not always be right, depending on what path it happened to choose.

David

3

aahhh, thanks, must have misread the api