立体变换算法

void draw(int a[8][4],CDC* pDC){
POINT point[8];
for(int i=0;i<8;i++){//投影
point[i].x=20+(a[i][0]*10-200)/(a[i][2]+10);
point[i].y=30+10*(a[i][1]*10-200)/(a[i][2]+10);
}
pDC->MoveTo (point[0]);
pDC->LineTo(point[1]);
pDC->LineTo(point[2]);
pDC->LineTo(point[3]);
pDC->LineTo(point[3]);
pDC->LineTo(point[5]);
pDC->LineTo(point[6]);
pDC->LineTo(point[7]);
pDC->LineTo(point[0]);
pDC->LineTo(point[5]);
pDC->MoveTo (point[1]);
pDC->LineTo(point[4]);
pDC->MoveTo (point[2]);
pDC->LineTo(point[7]);
pDC->MoveTo (point[3]);
pDC->LineTo(point[6]);
}
void CYingView::OnDraw(CDC* pDC)
{
CYingDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
int i,j;
int a[8][4]={30,30,40,1,30,50,40,1,30,50,0,1,50,50,0,1,
             50,50,40,1,50,30,40,1,50,30,0,1,30,30,0,1};