Original Post
Ok. I posted this question here a couple of months ago but the only answer I received was "Use STLport instead of the vc++ libs", which I did to no avail. So, here is a more detailed explanation of what is happening in hopes of someone having a real solution.
Basically, what is happening is that when I use vectors in my code I can only ever put one object in each vector. When debugging in VC++, the variables window lists info for three members of each vector: _M_start, _M_finish, and _M_end_of_storage. After placing one object in a vector _M_start correctly lists the info for the object placed in the vector, but the info for _M_finish is listed as "CXX0030: Error: Expression cannot be evaluated" and subsequent additions of objects to the vector are not successfull -- _M_finish is still listed as "CXX0030: Error: Expression cannot be evaluated." Here is the pertinent code:
If I am adding the node to the root node I pass NULL for the parent and otherwise search thru the msceneNodes to make sure that the parent passed is already in the graph. I realize that I don't have anything in the above code for what happens if the parent is not in the graph, but for this problem that is irrelevent. So, what is happening is that the second and all subsequent calls to pushback() on any vector fail so that I can get at most one child per node in the graph. This is REALLY frustrating me as this is basic scene graph/node and vector stuff. Also, of note: I have reproduced the same problem with somebody else's scene graph code, so I'm pretty sure that the problem is not actually with my code. As far as the compiler goes I have added C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\INCLUDE\STLPORT to my list of include directories as per STLport docs. Is there anything else I need to do, or is it something else?
[edited by - Mage2k on March 20, 2003 4:40:18 AM]
class SceneGraph
{
public:
void addNode(Node* _parent, Node* _child);
private:
std::vector<Node*> msceneNodes;
RootNode* mrootNode;
};
/*the constructor builds mrootNode and adds it to the msceneNodes vector (the first node)*/
SceneGraph::SceneGraph()
{
mrootNode = new RootNode();
msceneNodes.push_back(mrootNode);
}
void SceneGraph::addNode(Node* _parent, Node* _child)
{
if(_parent == NULL)
{
_child->setParent(mrootNode);
msceneNodes.push_back(_child);
mrootNode->attachChild(_child);
}
else
{
//make sure _parent is in the graph
std::vector<Node*>::iterator it = msceneNodes.begin();
bool found = FALSE;
for(; it != msceneNodes.end(); ++it)
{
if((Node*) it == _parent)
{
found = TRUE;
break;
}
}
if(found)
{
_child->setParent(_parent);
_parent->attachChild(_child);
msceneNodes.push_back(_child);
}
}
return;
}