void DoRect(SDraw &sw, double size)
{
	if(size < 0.5)
		return;
	
	sw.Move(0, 0);
	sw.Line(0, size);
	sw.Line(size, size);
	sw.Line(size, 0);
	sw.Fill(Blue());
	
	sw.Begin();
	sw.Translate(0, size);
	sw.Rotate(M_PI/4.);
	DoRect(sw, size / M_SQRT2);
	sw.End();

	sw.Begin();
	sw.Translate(size / 2, 1.5 * size);
	sw.Rotate(-M_PI/4.);
	DoRect(sw, size / M_SQRT2);
	sw.End();
}

void DrawPythagorasTree(Size sz, SDraw *sw, Cairo *ca)
{
	double size = 128;
	
	if (sw)
	{
		sw->Begin();
		sw->Translate(sz.cx / 2 - size / 2, sz.cy);
		sw->Scale(1, -1);
		
		DoRect(*sw, size);
		sw->End();
	}