def test_issue_494_make_path_from_spline_defined_by_fit_points_and_tangents():
from ezdxf.entities import Spline
spline = Spline.new(dxfattribs={
"degree":
3,
"start_tangent": (0.9920663924871818, 0.1257150464243202, 0.0),
"end_tangent": (0.9999448476387669, -0.0105024606965807, 0.0),
}, )
spline.fit_points = [
(209.5080107190219, 206.963463282597, 0.0),
(209.55254921431026, 206.96662062623636, 0.0),
]
p = make_path(spline)
assert len(p) > 0
def _process_2d_spline(self, spline: dxf.Spline, delta=0.1):
"""
Uses geomdl module to create intermediate b-spline from dxf spline.
This is then sampled as a linestring since shapely does not support splines.
"""
curve = NURBS.Curve()
curve.degree = spline.dxf.degree
curve.ctrlpts = spline.control_points
curve.weights = [1] * spline.control_point_count() #spline.weights
#curve.weights = spline.weights + [1] * np.array(spline.control_point_count()- len(spline.weights))
curve.knotvector = spline.knots
curve.delta = delta # TODO sampling - this could get out of hand depending on model dims and scale
#TODO conditional delta: min length, n and check for straight lines
xyz = np.array(curve.evalpts)
xy = list([x[:-1] for x in xyz]) #remove z data
pl = sg.LineString(xy)
self.geometry.append(pl)
def to_splines_and_polylines(
paths: Iterable[Path],
*,
g1_tol: float = G1_TOL,
dxfattribs: Optional[Dict] = None
) -> Iterable[Union[Spline, Polyline]]:
""" Convert the given `paths` into :class:`~ezdxf.entities.Spline` and 3D
:class:`~ezdxf.entities.Polyline` entities.
Args:
paths: iterable of :class:`Path` objects
g1_tol: tolerance for G1 continuity check
dxfattribs: additional DXF attribs
Returns:
iterable of :class:`~ezdxf.entities.Line` objects
.. versionadded:: 0.16
"""
if isinstance(paths, Path):
paths = [paths]
dxfattribs = dxfattribs or {}
for path in paths:
for data in to_bsplines_and_vertices(path, g1_tol):
if isinstance(data, BSpline):
spline = Spline.new(dxfattribs=dxfattribs)
spline.apply_construction_tool(data)
yield spline
else:
attribs = dict(dxfattribs)
attribs['flags'] = const.POLYLINE_3D_POLYLINE
polyline = Polyline.new(dxfattribs=dxfattribs)
polyline.append_vertices(data)
yield polyline
def _from_spline(spline: Spline, **kwargs) -> 'Path':
level = kwargs.get('level', 4)
path = Path()
tools.add_spline(path, spline.construction_tool(), level=level, reset=True)
return path
def make_spline_with_linear_segments():
s = Spline()
s.dxf.degree = 3
s.control_points = [
(56.22273085144742, -52.38516304166649, 0.0),
(56.22273085144742, -52.38516304166649, 0.0),
(239.1976236415998, -52.38516304166649, 0.0),
(239.1976236415998, -52.38516304166649, 0.0),
(240.3021931409851, -52.38516304166649, 0.0),
(241.1976236410993, -53.28059354178134, 0.0),
(241.1976236410993, -54.38516304116636, 0.0),
(241.1976236410993, -54.38516304116636, 0.0),
(241.1976236410993, -62.34529113912412, 0.0),
(241.1976236410993, -62.34529113912412, 0.0),
(241.1976236410993, -62.34529113912412, 0.0),
(241.1976236410993, -77.39045415751698, 0.0),
(241.1976236410993, -77.39045415751698, 0.0),
(241.1976236410993, -78.49328674892469, 0.0),
(240.3049021562092, -79.38799615050624, 0.0),
(239.2020722930055, -79.39044920938571, 0.0),
(239.2020722930055, -79.39044920938571, 0.0),
(233.6681749915751, -79.40275842984373, 0.0),
(233.6681749915751, -79.40275842984373, 0.0),
(232.5653451283714, -79.40521148872287, 0.0),
(231.6726236434806, -80.29992089030473, 0.0),
(231.6726236434806, -81.40275348171245, 0.0),
(231.6726236434806, -81.40275348171245, 0.0),
(231.6726236434806, -96.45719719271867, 0.0),
(231.6726236434806, -96.45719719271867, 0.0),
(231.6726236434806, -97.561766692104, 0.0),
(232.5680541435954, -98.4571971922182, 0.0),
(233.6726236429801, -98.4571971922182, 0.0),
(233.6726236429801, -98.4571971922182, 0.0),
(234.4351236427904, -98.4571971922182, 0.0),
(234.4351236427904, -98.4571971922182, 0.0),
(235.5396931421758, -98.4571971922182, 0.0),
(236.43512364229, -99.35262769233242, 0.0),
(236.43512364229, -100.4571971917187, 0.0),
(236.43512364229, -100.4571971917187, 0.0),
(236.43512364229, -115.5181506304424, 0.0),
(236.43512364229, -115.5181506304424, 0.0),
(236.43512364229, -116.6184332447135, 0.0),
(237.3238741828279, -117.512078028625, 0.0),
(238.4241402052798, -117.5181204707455, 0.0),
(238.4241402052798, -117.5181204707455, 0.0),
(243.9709633052181, -117.5485825197861, 0.0),
(243.9709633052181, -117.5485825197861, 0.0),
(245.07122932767, -117.5546249619067, 0.0),
(245.9599798682079, -118.4482697458182, 0.0),
(245.9599798682079, -119.5485523600892, 0.0),
(245.9599798682079, -119.5485523600892, 0.0),
(245.9599798682079, -161.5989385369997, 0.0),
(245.9599798682079, -161.5989385369997, 0.0),
(245.9599798682079, -162.7033810946488, 0.0),
(245.0647474718881, -163.5987590049695, 0.0),
(243.9603049288262, -163.5989385100843, 0.0),
(243.9603049288262, -163.5989385100843, 0.0),
(56.22327959401533, -163.6294514203422, 0.0),
(56.22327959401533, -163.6294514203422, 0.0),
(54.01388681794636, -163.6298105130854, 0.0),
(52.22262959575984, -161.838844498455, 0.0),
(52.2226294747784, -159.6294516932054, 0.0),
(52.2226294747784, -159.6294516932054, 0.0),
(52.22262382108676, -56.3802148685014, 0.0),
(52.22262382108676, -56.3802148685014, 0.0),
(52.22262372278778, -54.17103400176151, 0.0),
(54.01354998549841, -52.38015558004202, 0.0),
(56.22273085144742, -52.38021469295069, 0.0),
(56.22273085144742, -52.38021469295069, 0.0),
(56.22273085144742, -52.38516304166649, 0.0),
(56.22273085144742, -52.38516304166649, 0.0),
]
s.knots = [
0.0,
0.0,
0.0,
0.0,
1.0,
1.0,
1.0,
2.0,
2.0,
2.0,
3.0,
3.0,
3.0,
4.0,
4.0,
4.0,
5.0,
5.0,
5.0,
6.0,
6.0,
6.0,
7.0,
7.0,
7.0,
8.0,
8.0,
8.0,
9.0,
9.0,
9.0,
10.0,
10.0,
10.0,
11.0,
11.0,
11.0,
12.0,
12.0,
12.0,
13.0,
13.0,
13.0,
14.0,
14.0,
14.0,
15.0,
15.0,
15.0,
16.0,
16.0,
16.0,
17.0,
17.0,
17.0,
18.0,
18.0,
18.0,
19.0,
19.0,
19.0,
20.0,
20.0,
20.0,
21.0,
21.0,
21.0,
22.0,
22.0,
22.0,
22.0,
]
return s