//Rectangle with rounded corners
Painter & Painter::Rectangle(double x, double y, double cx, double cy, double r)
{
	ASSERT(r >= 0.);
	if (cx < 0.) {x+=cx; cx=-cx;}
	if (cy < 0.) {y+=cy; cy=-cy;}

	Move(x+r,y)
	.Arc(x+r,y+r,r,r,-M_PI/2.,-M_PI/2.)
	.Line(x, y+cy-r)
	.Arc(x+r,y+cy-r,r,r,M_PI,-M_PI/2.)
	.Line(x+cx-r, y+cy)
	.Arc(x+cx-r,y+cy-r,r,r,M_PI/2,-M_PI/2.)
	.Line(x+cx, y+r)
	.Arc(x+cx-r,y+r,r,r,0.,-M_PI/2.)
	.Line(x+r, y);
}