c++ - 对象类型私有(private)类成员

Question

边界框和立方体都在它们的构造函数中接受一些参数

标题:

#ifndef WALL_H
#define WALL_H

#include "cube.h"
#include "BoundingBox.h"

class Wall
{
    private:
        Cube* cube;
        BoundingBox* boundingBox;
    public:
        Wall(D3DXVECTOR3 min, D3DXVECTOR3 max);
        ~Wall();
        void Draw(D3DXMATRIX matView, D3DXMATRIX matProjection);
};

#endif

来源:

#include "Wall.h"

Wall::Wall(D3DXVECTOR3 min, D3DXVECTOR3 max)
{
    cube = new Cube(D3DXCOLOR(255, 20, 20, 255), min, max);
    boundingBox = new BoundingBox(min, max);
}

void Wall::Draw(D3DXMATRIX matView, D3DXMATRIX matProjection)
{
    cube->Draw(matView, matProjection);
}

Wall::~Wall()
{
    delete cube;
    delete boundingBox;
}

我的问题是，我如何修改这些类，使 cube 和 boundingBox 不是指针，而是简单的实例？提前致谢。

Answer 1

很简单。就像这样:

#ifndef WALL_H
#define WALL_H

#include "cube.h"
#include "BoundingBox.h"

class Wall
{
private:
Cube cube;
BoundingBox boundingBox;
public:
Wall(D3DXVECTOR3 min, D3DXVECTOR3 max);
void Draw(D3DXMATRIX matView, D3DXMATRIX matProjection);
};

#endif

来源:

#include "Wall.h"

Wall::Wall(D3DXVECTOR3 min, D3DXVECTOR3 max)
    :cube(D3DXCOLOR(255, 20, 20, 255), min, max)
    ,boundingBox(min, max)
{
}

void Wall::Draw(D3DXMATRIX matView, D3DXMATRIX matProjection)
{
    cube.Draw(matView, matProjection);
}