CollisionNode add_solid CollisionPolygon

Scripting Issues
1 
LVecBase3f a = LVecBase3f(100, 100, 100);
LVecBase3f b = LVecBase3f(-100, 100, 100);
LVecBase3f c = LVecBase3f(-100, -100, 100);
LVecBase3f d = LVecBase3f(100, -100, 100);
PT(CollisionPolygon) map_quad = new CollisionPolygon(a,b,c,d);

PT(CollisionNode) map_CNode = new CollisionNode("mapColl");
map_CNode->add_solid(map_quad);
map_NP.attach_new_node(map_CNode);

c_trav.add_collider(map_NP, pick_handler);

I tried to make a CollisionPolygon with the 4 points above for my picking. It builds fine but when i run the application, i get an asserton error on the line map_CNode->add_solid(map_quad);

I used somewhat the same code to create other collision solids such as spheres which worked fine (replace new CollisionPolygon() with CollisionSphere()). But it just isn’t working for CollisionPolygon.

2

Without knowing exactly which version of Panda you’re using, I can’t tell you precisely what this assertion means, but this is a NodePath assertion, not a collision assertion. I suspect you’re actually getting the error with the line:

map_NP.attach_new_node(map_CNode);

Is it possible that map_NP is an empty NodePath? Maybe you meant to do this line instead:

map_NP = NodePath(map_CNode);

David