Arrr... I'm struggling to get started using STL (yeah yeah, I know i should have done it a long time ago :) ) and it seems that my dynamic 2d array using vectors simply wont work.
I have a matrix class as follows:
#include <vector>
template <typename T>
class Matrix
{
public:
Matrix(){};
Matrix(int rows, int cols)
{
for(int i=0; i<rows; ++i)
{
data_.push_back(std::vector<T>(cols));
}
}
inline std::vector<T> & operator[](int i) { return data_; }
inline const std::vector<T> & operator[] (int i) const { return data_; }
private:
std::vector<std::vector<T> > data_;
};
and a socket class (basically just a simple struct):
[
class Socket
{
public:
Socket::Socket() {};
Socket::Socket(Ball* ball_, int x, int y)
{
// do things
}
// copy ctor
Socket::Socket(const Socket& p)
{
// do things
}
Ball* ball;
cpBody* body;
};
and I have a data member thats a matrix of sockets:
class BallManagerClass
{
public:
Matrix<Socket> Sockets;
// Ctor that initializes the matrix with a dynamic size
BallManagerClass::BallManagerClass() :
Sockets(GameData->GetMaxRows(),GameData->GetBallsPerRow())
// has other methods - will post if needed
};
and lastly, i have a ball class that recieves the sockets matrix and does some manipulation on it:
class Ball
{
public:
.
.
.
void UpdateSocket(Matrix<Socket> Sockets);
};
this compiles but Sockets is passed by value.
now here's the problem - i cant manage to pass the Sockets matrix by reference so that the UpdateSocket method can manipulate it. the way i see it i have 2 options:
1. change the sockets matrix to type <Socket*>, but then i have to 'new' all the objects and it seems kind of silly to me
2. pass the matrix<socket> as by reference (e.g: sending a pointer to the matrix). when i try to do that by chaning the header to UpdateSocket(Matrix<Socket>* Sockets) and sending it as such:
obj->UpdateSocket(&Sockets) I get the following error:
error C2440: 'initializing' : cannot convert from 'std::vector<_Ty>' to 'Socket *' on the following line of code in UpdateSocket:
Socket* newSocket = &Sockets[0][0];
could it be that the matrix is already all made pointers, therefor i should do something else here? Im trying all sorts of things, but nothing seems to work.
If someone actually manages to read everything I just wrote and solve this I shall built him a little shrine in my study.
Thanks! :)
