c++ - 无法将 struct** 转换为 const POINT* 作为参数？

Question

大家好，我使用 winapi，我想在 3d 中做一个正方形，我定义点将它们与一个函数结合起来，我一直在尝试 3 个函数，但我无法让它们工作，我在 3 个 em 中遇到相同的错误 > .<

错误说

In member function `void Cube::Show(void)':|
    cannot convert `const Cube::Show()::POINT3D**' to `const POINT*' 
    for argument `2' to `BOOL Polygon(HDC__*, const POINT*, int)'|

当我使用多边形函数或多边形贝塞尔曲线或折线时出现错误

请提供任何帮助，我们将不胜感激

void Cube::Show(void)
{
    typedef struct point3d
    {
       double x;
       double y;
       double z;
    } POINT3D;

    POINT3D Face1[] = {
   { 20.0,-20.0,-20.0},
   {-20.0,-20.0,-20.0},
   {-20.0, 20.0,-20.0},
   { 20.0, 20.0,-20.0}
    };
    POINT3D Face2[] = {
   {-20.0,-20.0,-20.0},
   {-20.0,-20.0, 20.0},
   {-20.0, 20.0, 20.0},
   {-20.0, 20.0,-20.0}
    };
    POINT3D Face3[] = {
   { 20.0, 20.0, 20.0},
   {-20.0, 20.0, 20.0},
   {-20.0,-20.0, 20.0},
   { 20.0,-20.0, 20.0}
    };
    POINT3D Face4[] = {
   { 20.0,-20.0, 20.0},
   { 20.0,-20.0,-20.0},
   { 20.0, 20.0,-20.0},
   { 20.0, 20.0, 20.0}
    };
    POINT3D Face5[] = {
   { 20.0,-20.0, 20.0},
   {-20.0,-20.0, 20.0},
   {-20.0,-20.0,-20.0},
   { 20.0,-20.0,-20.0}
    };
    POINT3D Face6[] = {
   { 20.0, 20.0,-20.0},
   {-20.0, 20.0,-20.0},
   {-20.0, 20.0, 20.0},
   { 20.0, 20.0, 20.0}
    };

    POINT3D *Faces[] = {Face1,Face2,Face3,Face4,Face5,Face6};
 Rectangle(this->_hdc,this->DrawArea.left,this->DrawArea.top,this->DrawArea.right,this->DrawArea.bottom);

    Polygon(_hdc,Faces,6);
    /*BeginPath(_hdc);
    PolyBezier(Faces,6);
    EndPath(_hdc);*/
    //Polyline(_hdc,Faces,6);
}

Answer 1

您正在传递 POINT3D 版本的 POINT，而不是全局命名空间中的 POINT。结构相同，只是类型转换而成。此外，您传递的是数组的数组而不是单个数组。

因此，我建议您重新访问该 API，看看它需要什么 - 类似

Polygon(_hdc,((POINT *) (Faces[0])),6) perhaps