CODE:

void CtestView::OnDraw(CDC* pDC)
{
	CtestDoc* pDoc =GetDocument();

	// 背景
	bkcolor = RGB(255,255,255);

	// 簡単のためカメラは原点に
	CRect rc;
	GetClientRect(&rc);
	POINT org = {300, 300};

	double ang = 3.14/3;
	double z = 100 - pDoc->z;
	MYPOINT3 p = {0, 0, z};
	MYPOINT3 plight = {100, 400, -100};
	COLORREF light = RGB(255,255,255);

	double r = 30;
	double t = tan(ang);
	double r2 = r / p.z / t * rc.Height();
	COLORREF col = RGB(255,255,50);

	double spratter = 0.8; // 拡散係数(ホンマかいな)
	double base = 0.5;

	MYBITMAP bmp(MYBITMAP::RGB24, 2*r2,2*r2);
	double cx = bmp.getw()/2;
	double cy = bmp.geth()/2;
	double ratio = r2/r;

	int x;
	int y;

	for(int i=0;i= sqrt(r2*r2-x*x))
			{
				memset(bmp.getvp()+i*bmp.getww()+j*3,0,3);
				continue;
			}
			MYPOINT3 vlight = {plight.x,plight.y,z-plight.z};
			MYPOINT3 vgrad = {x/ratio,y/ratio,sqrt(r2*r2-x*x-y*y)/ratio};
			double strength = MYGetCos(vlight,vgrad);
			if(strength >8)*min(strength + base, 1));
			*(bmp.getvp()+i*bmp.getww()+j*3+2)=(char)((BYTE)(col>>16)*min(strength + base, 1));
		}
	}

	bmp.Draw(pDC->m_hDC, org.x-r2/2, org.y-r2/2,true);
}