class Object
{
public:
Object() {}
~Object() {}
void addChild(Object* pChild)
{
assert(pChild);
pChild->setParent(this);
children.push_back(pChild);
}
std::vector<Object*>* getChildList()
{
return &children
}
protected:
std::vector<Object*> children;
GameObject* parent;
private:
void setParent(Object* pParent)
{
parent = pParent;
}
};
void Render::updateScene(Object* pObject)
{
// Base case for the recursion
if (pObject == NULL)
return;
else
{
pObject->update();
pObject->draw();
// begin problem code
std::vector<pObject*>::iterator it = pObject->getChildList()->begin();
assert(it);
while (it != pObject->getChildList()->end())
{
updateScene(*it);
}
// end problem code
}
}
Problem with children
Author
Im trying to get a decent way to render all my OO classes. Using one of the Columns on this site I implemented this code(its not the TOTAL code, but it should be enough for someone to point out what im doing wrong)
The problem is that my iterator in Render::updateScene always asserts and i dont know what is the matter.
Any help is appreciated
[edited by - useful on June 7, 2002 5:36:42 PM]
[edited by - useful on June 7, 2002 5:37:53 PM]
Author
I agree, yet I dont even know how to explain the problem. So I took my english 101 approach =)
Author
sorry, thought i commented the problem properly. It asserts after declaring the iterator in Render::updateScene.
I dont understand if the iterator is screwed or if the vector of objects is being passed incorrectly.
I dont understand if the iterator is screwed or if the vector of objects is being passed incorrectly.
assert (it) doesn''t make any sense. If you''re trying to make sure that your container isn''t empty, you should:
assert (pObject->getChildList()->end () != it);
assert (*it) will assert the contained object (a pointer) is not null.
I''m not sure which of those is what you meant.
assert (pObject->getChildList()->end () != it);
assert (*it) will assert the contained object (a pointer) is not null.
I''m not sure which of those is what you meant.
Author
i figured it out, i wasnt accually using the iterator (stupid me) and asserting it doesnt help because it is an iterator.
thx for the suggestion, it helped alot. code works now.
thx for the suggestion, it helped alot. code works now.
This topic is closed to new replies.
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