Question

I have this constructor:

Transform::Transform( float matrix[4][4] )
{
    m = matrix;
}

And this class definition:

class Transform
{
    float m[4][4];
public:
    Transform();
    Transform(float matrix[4][4]);

But this does not compile.

What could be wrong?

Error 1 error C2440: ‘=’ : cannot convert from ‘float [][4]’ to ‘float [4][4]’ c:\Users\Josh\Documents\agui\trunk\src\Agui\Transform.cpp 75

Thanks

Answer 1

If you are using c++11 try to change float matrix[4][4] to std::array<std::array<float,4>,4>

It is a mouthful, but it supports such operations that c arrays do not natively support.

You could do something like this to clean up the syntax.

typedef std::array<std::array<float,4>,4> Matrix;

Now you can do

Matrix myMatrix;

p.s If you are not using C++11, you could use vector instead of array. It is a little different from array, but adds more features as well, and after you set it up access is identical.