Actor class... | GameDev.net

ZitherMan · 2002-07-27T09:17:37+00:00

Hey all. I''m making an actor class which several of my moving objects should use. So i start with something simple like: class actor { int x,y,z; GLvoid draw(); }; the draw function should draw the objects model, ie. a pyramid. So how would i make this support several models? Thanks /ZitherMan

The best way is to derive a class from actor, and to make the draw function virtual.

For example:


class actor
{
public:
  union // i would put this in a union for ease of use
  {
    GLfloat x,y,z;  
    GLfloat position[3];
  };
  virtual GLvoid draw();
};

class mesh : public actor
{
public:
  mesh(char* filename); //constructor which loads mesh from file
  float vertexindex[]; //or put whatever storage system you want
  virtual GLvoid draw(); //virtual in case you want to derive
                         //more mesh classes from mesh
};

With that, you would be able to do something like this


mesh pyramid = new mesh("pyramid.3ds");
mesh box = new mesh("box.3ds");

pyramid.x = 5; 
pyramid.y = 5; //these lines do the same thing as
pyramid.z = 5;

box.position = {5, 5, 5}; // this

pyramid.draw();
box.draw();  //draws the meshes

Hope that helped

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