Passing an int to a function, then using that int to create an array

Question

I\'m trying to create a textureLoader class for my openGL project and I can\'t initialize an array of textures inside of my class constructor because the the array won\'t accept

Answer 1

Your second options is close, you can get at the underlying array of the vector by calling .data()

myConstructor(int num)
{
    std::vector <GLuint> textures(num);
    glGenTextures(num, textures.data());
}

Assuming glGenTextures has a signature like

void glGenTextures(int, GLuint*)

I don't know much about this function, but be careful who owns that array. The vector will fall out of scope after your constructor so I'm hoping that glGenTextures will copy whatever it needs. Otherwise if the array needs to persist

myConstructor(int num)
{
    GLuint* textures = new GLuint[num];
    glGenTextures(num, textures);
}

But then I'm not sure who is supposed to clean up that memory.