Hey, sorry for the lacking information.<br><br>May I declare it as this instead:<br><br>C++ Class<br>class GameObjectManager<br>{<br> map<GameObject*, Data> a_map; // this map has "nothing" to do with python dict<br>
GameObject* createGameObject(id)<br> {<br> Gameobject* obj = new Gameobject(id);<br> a_map[ obj ] = ...some data...<br> return obj;<br> }<br><br><br> callPython()<br> {<br> // get game object from map<br>
obj = a_map.getgameobject()<br> boost::python::get_override("callbackFunction")(boost::python::object(boost::python::ptr(obj)));<br> }<br><br>}; // end of class<br><br>The python class:<br><br><br>class myRandomClass:<br>
def __init(self, the_c++_GameobjectManager_pointer):<br> self.manager = the_c++_GameobjectManager_pointer<br> gameobject = self.manager.createGameObject(1) #self.manager.createGameObject() returns a pointer to the gameobject created in c++<br>
self.mylist[gameobject] = ..some data..<br><br> def callPython(self, gameobj): # at some point, c++ will call this function and pass the game object we created above with id 1<br> for x in self.mylist.keys():<br>
print(x == gameobj) # True<br> print(gameobj in mylist) # False<br><br>So basically the c++ class and python class have their own dict but I want them to have the <b>same </b>address value in their keys .. is it possible??<br>
<br>It seems, in c++ the key is the address of the game object and in Python it some other address (but they basically point to the same object/memory). Is there any way around this <u>without</u> changing the type of the key being used, i.e. keep the key as a pointer.<br>
<br><br><br><br><div class="gmail_quote">On Fri, Sep 24, 2010 at 4:27 PM, Stefan Seefeld <span dir="ltr"><<a href="mailto:seefeld@sympatico.ca">seefeld@sympatico.ca</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Simon,<br>
<br>
I don't quite understand what you are trying to do. Please provide a little more detail. Your current mail requires far too much second-guessing to be useful.<div class="im"><br>
<br>
On 09/24/2010 10:08 AM, Simon W wrote:<br>
</div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="im">
Hi,<br>
<br>
Im really scared because I fear a fundamental issue concerning the script system in my game engine.<br>
<br>
<br>
In C++, I have a class. In my class I map data to GameObject like:<br>
<br>
*class<br>
{<br>
map<GameObject*, Data> .....<br></div>
}*<br>
</blockquote>
<br>
OK. (Naming this class would help the discussion, though.)<br>
<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="im">
<br>
As you see, I use the pointer as key.<br>
<br>
When I from c++, in the same class, call a python function I pass the key like this:<br>
<br>
*class::callPythonFunctions()<br>
{<br>
boost::python::get_override("callbackFunction")(boost::python::object(boost::python::ptr(gameobject))); // the variable /gameobj /is of type GameObject*<br>
}<br></div>
*<br>
</blockquote>
<br>
OK.<br>
<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="im">
<br>
When I recieve the call in python I do some checks like this:<br>
<br>
*def callbackFunction(self, gameobj):<br>
for x in self.mydict.keys():<br>
print("Checking")<br>
print(gameobj == self.mydict)<br></div>
print(gameobj in self.mydict)*<br>
</blockquote>
<br>
This looks wrong. You iterate over 'x', but don't use it in the loop. May I assume that 'mydict' relates to the above map<GameObject*, Data> in the unnamed class ?<br>
<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="im">
<br>
<br>
The above will print something like:<br>
/....<br>
Checking<br>
True<br>
False<br></div>
.../<br>
</blockquote>
<br>
This suggests that 'gameobj' compares equal to the 'mydict' object, but that it is not itself included in the sequence returned by mydict.keys().<div class="im"><br>
<br>
<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
I do have a overloaded == operator. But how can I fix so that python checks for my pointer and not the PyObject* pointer ?<br>
</blockquote>
<br></div>
What type do you consider providing an operator== for ?<br>
<br>
Stefan<br><font color="#888888">
<br>
<br>
-- <br>
<br>
...ich hab' noch einen Koffer in Berlin...<br>
<br>
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