Grafika zvezda

void DrawStar(CDC* pDC, CPoint ptCenter, int radius1, int radius2, int n)
{
	CBrush boja, *oldBrush;
	boja.CreateSolidBrush(RGB(255, 255, 0));
	CPen olovka, *oldPen;
	olovka.CreatePen(PS_SOLID, 4, RGB(0, 0, 0));
	XFORM forma, oldForm;
	forma.eDx = ptCenter.x;
	forma.eDy = ptCenter.y;
	forma.eM11 = 0;
	forma.eM12 = 0;
	forma.eM21 = 0;
	forma.eM22 = 0;
	float ugao = 360 / n;
	oldPen = pDC->SelectObject(&olovka);

	GetWorldTransform(pDC->m_hDC, &oldForm);

	SetWorldTransform(pDC->m_hDC, &forma);
	pDC->BeginPath();
	pDC->MoveTo(0, -radius1);

	forma.eDx = 0;
	forma.eDy = 0;
	forma.eM11 = cos((ugao / 2) * (pi / 180));
	forma.eM12 = sin((ugao / 2) * (pi / 180));
	forma.eM21 = -sin((ugao / 2) * (pi / 180));
	forma.eM22 = cos((ugao / 2) * (pi / 180));

	for (int i = 0; i < n * 2; i++)
	{
		ModifyWorldTransform(pDC->m_hDC, &forma, MWT_LEFTMULTIPLY);
		if (i % 2 == 0)
			pDC->LineTo(0, -radius2);
		else
			pDC->LineTo(0, -radius1);
	}
	oldBrush = pDC->SelectObject(&boja);
	pDC->EndPath();
	pDC->FillPath();

	pDC->SelectObject(oldPen);
	pDC->SelectObject(oldBrush);
	boja.DeleteObject();
	olovka.DeleteObject();

	SetWorldTransform(pDC->m_hDC, &oldForm);
}