if (angle < PI*1/4 and angle > -PI*1/4) then
		radius = radius*math.cos(angle)
	elseif (angle > PI*3/4 or angle < -PI*3/4) then
		radius = -radius*math.cos(angle)
	elseif (angle < PI*3/4 and angle > PI*1/4) then
		radius = radius*math.sin(angle)
	elseif (angle > -PI*3/4 and angle < -PI*1/4) then
		radius = -radius*math.sin(angle)
	end