function rough_tin(obj)
{
        return
                color(0.6, 0.6, 0.8,
                        o_bump(0.03, 0.05,
                                obj
                        )
                );
}

function knee_arc(outer_dia, thickness, width, sweep)
{
	return
		intersection(
				#translate(0,-outer_dia,-width/3,cube(outer_dia, outer_dia, width*3)),
				color(0,0,1,difference(cylinder(outer_dia,width),
					translate(0,0,-width/2,cylinder(outer_dia-thickness*2,width*2)))),
				color(1,0,0,translate(0,-outer_dia,-width/3,cube(outer_dia, outer_dia, width*3))),
				color(0,1,0,rotate(0,0,-sweep, translate(-outer_dia,-outer_dia*2,-width/3,cube(outer_dia*2,outer_dia*2,width*4))))
			);
}


function main(ARGV)
{

length_total = "2.0";
thickness = "0.3";
outer_dia = "0.8";
height = "1.0";
width = "0.4";
bend_angle = "15.0";
bend_start = "0.75";


diag_length = (height-outer_dia+outer_dia/2*sin(bend_angle/180*3.14159265359)+(outer_dia/2-thickness)*sin(bend_angle/180*3.14159265359))/cos(bend_angle/180*3.14159265359);

bend_shift = diag_length*sin(bend_angle/180*3.14159265359)-(1-cos(bend_angle/180*3.14159265359))*(outer_dia/2-thickness)-(1-cos(bend_angle/180*3.14159265359))*outer_dia/2;

knee1 = translate(bend_start,outer_dia/2,0,knee_arc(outer_dia, thickness, width, bend_angle));
knee2 = translate(length_total-bend_start+bend_shift,height-outer_dia/2,0,rotate(0,0,180, knee_arc(outer_dia, thickness, width, bend_angle)));
commit(o_fn(30,union(leg1, knee1, leg2, knee2, leg3)));
}