def _document_as_border(self) -> None:
"""
Adds a beam blocking contour on the borders of the document to
prevent the beams from going to infinity
"""
svg = self.document.getroot()
w = self.svg.unittouu(svg.get('width'))
h = self.svg.unittouu(svg.get('height'))
contour_geometry = geom.CompositeCubicBezier([geom.CubicBezierPath([
geom.CubicBezier(np.array([[0, 0], [0, 0], [w, 0], [w, 0]])),
geom.CubicBezier(np.array([[w, 0], [w, 0], [w, h], [w, h]])),
geom.CubicBezier(np.array([[w, h], [w, h], [0, h], [0, h]])),
geom.CubicBezier(
np.array([[0, h], [0, h], [0, 0], [0, 0]]))])])
self._document_border = OpticalObject(contour_geometry, mat.BeamDump())
self._world.add_object(self._document_border)
def superpath_to_bezier_segments(superpath: inkex.CubicSuperPath) \
-> geom.CompositeCubicBezier:
"""
Converts a superpath with a representation
[Subpath0[handle0_0, point0, handle0_1], ...], ...]
to a representation of consecutive bezier segments of the form
CompositeCubicBezier([CubicBezierPath[CubicBezier[point0, handle0_1,
handle1_0, point1], ...], ...]).
"""
composite_bezier = list()
for subpath in superpath:
bezier_path = list()
for (__, p0, p1), (p2, p3, __) in pairwise(subpath):
bezier = geom.CubicBezier(np.array([p0, p1, p2, p3]))
bezier_path.append(bezier)
composite_bezier.append(geom.CubicBezierPath(bezier_path))
return geom.CompositeCubicBezier(composite_bezier)