Question

I have Vector class, representing a 3D point, written as follows in Vector.h:

class Vector {
  public:
    float x,y,z;
    Vector(float _x=0.0,float _y=0.0,float _z=0.0){x=_x;y=_y;z=_z;};
    operator float *() { return &x;};
};

I also declare a extern vector<Vector>model_vertices; on model.h

On a model.cpp file I implement Vector.h and declare a std::vector<Vector>model_vertices; globally (yes, I know the vector/Vector thing is confusing, but I must use the Vector naming for consistency).

On model.cpp, when initializing the contents of this vector I use a for loop with the following content:

float X,Y,Z;

offFileStream>>X;
offFileStream>>Y;
offFileStream>>Z;


Vector v=new Vector(X,Y,Z);


model_vertices[loadVertexIndex]=v;

I get the following error:

error C2440: 'initializing' : cannot convert from 'Vector *' to 'Vector'

Why?

Answer 1

The error is on this line:

Vector v=new Vector(X,Y,Z);

v is of type Vector, but new Vector(X,Y,Z) returns a Vector*:

What you probably wanted instead is just:

Vector v(X,Y,Z);

As a side note, I didn’t see you initialize a size for the model_vertices. So you may want to use push_back() instead.