XMMATRIX operator() working with xnamath.h but not with DirectXMath.h

Question

I am new to directX programming and Visual C++ and I am having an issue migrating an example I found from xnamath.h to DirectXMath.h. I am using Visual Studio 2012.

The purpose of the code is simply to initialize a XMMATRIX and then display it in the console. The original code is shown below (it works just fine):

#include <windows.h>
#include <xnamath.h>
#include <iostream>
using namespace std;

ostream& operator<<(ostream& os, CXMMATRIX m)
{
    for(int i = 0; i < 4; ++i)
    {
        for(int j = 0; j < 4; ++j)
            os << m(i, j) << "\t";
        os << endl;
    }
    return os;
}

int main()
{
    XMMATRIX A(1.0f, 0.0f, 0.0f, 0.0f,
               0.0f, 2.0f, 0.0f, 0.0f,
               0.0f, 0.0f, 4.0f, 0.0f,
               1.0f, 2.0f, 3.0f, 1.0f);

    cout << "A = " << endl << A << endl;

    return 0;
}

When I run the program it gives the following output:

A =
1       0       0       0
0       2       0       0
0       0       4       0
1       2       3       1

Press any key to continue . . .

However, when I change the headers to DirectXMath it no longer works:

#include <windows.h>
#include <iostream>
#include <DirectXMath.h>
#include <DirectXPackedVector.h>
using namespace DirectX; 
using namespace DirectX::PackedVector;
using namespace std;

ostream& operator<<(ostream& os, CXMMATRIX m)
{
    for(int i = 0; i < 4; ++i)
    {
        for(int j = 0; j < 4; ++j)
            os << m(i, j) << "\t";
        os << endl;
    }
    return os;
}

int main()
{
    XMMATRIX A(1.0f, 0.0f, 0.0f, 0.0f,
               0.0f, 2.0f, 0.0f, 0.0f,
               0.0f, 0.0f, 4.0f, 0.0f,
               1.0f, 2.0f, 3.0f, 1.0f);

    cout << "A = " << endl << A << endl;

    return 0;
}

When I try to compile I get an error with os << m(i, j) << "\t"; which says:

error C2064: term does not evaluate to a function taking 2 arguments

When I hover over the red squiggly line under m(i, j) it tells me:

DirectX::CXMMATRIX m
Error: call of an object of a class type without appropriate operator() or conversion function to pointer-to-function type

Any advice would be greatly appreciated.

Answer 1

I changed the example code to use

ostream& operator<<(ostream& os, CXMMATRIX m)
{
    for(int i = 0; i < 4; ++i)
    {
            for(int j = 0; j < 4; ++j)
                os << m.r[i].m128_f32[j] << "\t";
            os << endl;
    }
    return os;
}

This will have the same effect as the old xnamath had.

Answer 2

It depends on the version you are using for DirectXMath, you can define _XM_NO_INTRINSICS_ to get the result you want. See http://msdn.microsoft.com/en-us/library/windows/desktop/microsoft.directx_sdk.reference.xmmatrix(v=vs.85).aspx for more information