def roundedRectangle(length,
width,
corner_radius,
bit_diameter,
path_ref='outside'):
""" Assumes it's in INCREMENTAL MODE.
Since length and width arguments are not related to any position.
With path_ref='outside', the length and width define the outer boundary of the cut.
With path_ref='center', the length and width define the cut path (centerline of cut) boundary.
With path_ref='inside', the length and width define the inner boundary of the cut.
Assumes that the bit is already in a starting position, at least X of least Y edge;
path_ref is not a consideration.
"""
bit_radius = bit_diameter / 2.0
corner_diameter = 2 * corner_radius
if corner_radius <= 0:
raise ValueError('corner_radius %d must be greater than 0.' %
corner_radius)
if path_ref is 'outside':
# TODO: check that corner_radius > bit_radius
if corner_radius <= bit_radius:
raise ValueError(
'corner_radius %d must be greater than bit radius %d.' %
(corner_radius, bit_radius))
center_offset = corner_radius - bit_radius
file_text = G.G1_X(length - corner_diameter)
file_text += G.G3XY_to_INCR_FULL((center_offset, center_offset),
(0, center_offset))
file_text += G.G1_Y(width - corner_diameter)
file_text += G.G3XY_to_INCR_FULL((-center_offset, center_offset),
(-center_offset, 0))
file_text += G.G1_X(-length + corner_diameter)
file_text += G.G3XY_to_INCR_FULL((-center_offset, -center_offset),
(0, -center_offset))
file_text += G.G1_Y(-width + corner_diameter)
file_text += G.G3XY_to_INCR_FULL((center_offset, -center_offset),
(center_offset, 0))
elif path_ref is 'center':
file_text = G.G1_X(length - corner_diameter)
file_text += G.G3XY_to_INCR_FULL((corner_radius, corner_radius),
(0, corner_radius))
file_text += G.G1_Y(width - corner_diameter)
file_text += G.G3XY_to_INCR_FULL((-corner_radius, corner_radius),
(-corner_radius, 0))
file_text += G.G1_X(-length + corner_diameter)
file_text += G.G3XY_to_INCR_FULL((-corner_radius, -corner_radius),
(0, -corner_radius))
file_text += G.G1_Y(-width + corner_diameter)
file_text += G.G3XY_to_INCR_FULL((corner_radius, -corner_radius),
(corner_radius, 0))
elif path_ref is 'inside':
center_offset = corner_radius + bit_radius
file_text = G.G1_X(length - corner_diameter)
file_text += G.G3XY_to_INCR_FULL((center_offset, center_offset),
(0, center_offset))
file_text += G.G1_Y(width - corner_diameter)
file_text += G.G3XY_to_INCR_FULL((-center_offset, center_offset),
(-center_offset, 0))
file_text += G.G1_X(-length + corner_diameter)
file_text += G.G3XY_to_INCR_FULL((-center_offset, -center_offset),
(0, -center_offset))
file_text += G.G1_Y(-width + corner_diameter)
file_text += G.G3XY_to_INCR_FULL((center_offset, -center_offset),
(center_offset, 0))
else:
raise ValueError('Invalid path reference specified: %s.' % path_ref)
return file_text
