def to_svg_path(line_segment_chain: LineSegmentChain, transformation=None, color="black",
stroke_width="0.864583px", draw_arrows=False) -> ElementTree.Element:
"""
A handy debugging function which converts the current line-chain to svg form
:param line_segment_chain: The LineSegmentChain to the converted.
:param transformation: A transformation to apply to every line before converting it.
:param color: The path's color.
:param stroke_width: The path's stroke width.
:param stroke_width: Whether or not to draw arrows at the end of each segment. Requires placing the output of
arrow_defs() in the document.
"""
start = Vector(line_segment_chain.get(0).start.x, line_segment_chain.get(0).start.y)
if transformation:
start = transformation.apply_transformation(start)
d = f"M{start.x} {start.y}"
for line in line_segment_chain:
end = Vector(line.end.x, line.end.y)
if transformation:
end = transformation.apply_transformation(end)
d += f" L {end.x} {end.y}"
style = f"fill:none;stroke:{color};stroke-width:{stroke_width};stroke-linecap:butt;stroke-linejoin:miter;stroke" \
"-opacity:1 "
path = ElementTree.Element("{%s}path" % svg_namespace)
path.set("d", d)
path.set("style", style)
if draw_arrows:
path.set("marker-mid", "url(#arrow-346)")
return path
def append_line_chain(self, line_chain: LineSegmentChain):
"""
Draws a LineSegmentChain by calling interface.linear_move() for each segment. The resulting code is appended to
self.body
"""
if line_chain.chain_size() == 0:
warnings.warn("Attempted to parse empty LineChain")
return []
code = []
start = line_chain.get(0).start
# Don't turn off laser if the new start is at the current position
if self.interface.position is None or abs(
self.interface.position - start) > TOLERANCES["operation"]:
code = [
self.interface.laser_off(),
self.interface.linear_move(z=self.movement_height),
self.interface.set_movement_speed(self.movement_speed),
self.interface.linear_move(start.x, start.y),
self.interface.set_movement_speed(self.cutting_speed),
self.interface.set_laser_power(1),
self.interface.linear_move(z=self.cutting_height)
]
for line in line_chain:
code.append(self.interface.linear_move(line.end.x, line.end.y))
self.body.extend(code)