CODEWITHSUNDEEP
c++pointers
HeroesVII
HeroesVII

Reputation: 148

Should I use pointer here?

Let`s create three classes:

Class Vector3d:

class Vector3d{
    int a,b,c;
}

Class Face, every Face contains 3 vector:

class Face{
    Vector3d *a, *b, *c;
}

And class Mesh(3d object): in class mesh i can just get vector of faces, but most object of Vector3d class will be shared between many Faces so I`d like to store Vector3d in Mesh class and store only pointer in Face object;

class Mesh{
    std::vector<Vector3d> points;
    std::vector<Face> faces;
}

Problem is, that i don`t understand when should I delete pointer in Face class, should I use something else instead of this?

Edit: 3 int are just to explain my concept, in final verison there will be more data in Vector3d class

Upvotes: 3

Views: 123

Answers (1)

Raildex
Raildex

Reputation: 4727

Face should store indices, not pointers.
I.e. Face should have three members:
unsigned a,b,c;

Indices are safe if you add/remove/resize the Vector3d vector.
It also allows you to share points between faces in a more convenient way.

It also means you can copy the conents of your faces vector directly into a Graphics API buffer (taking granted types match).

Upvotes: 6

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