def test_from_ellipse():
from ezdxf.entities import Ellipse
spline = Spline.from_arc(
Ellipse.new(
dxfattribs={
'center': (1, 1),
'major_axis': (2, 0),
'ratio': 0.5,
'start_param': 0.5, # radians
'end_param': 3,
'layer': 'ellipse',
}))
assert spline.dxf.layer == 'ellipse'
assert spline.dxf.degree == 2
assert len(spline.control_points) > 2
assert len(spline.weights) > 2
assert len(spline.fit_points) == 0
assert len(spline.knots) == required_knot_values(
len(spline.control_points), spline.dxf.degree + 1)
def _audit_control_points(self, auditor: 'Auditor'):
name = str(self)
order = self.dxf.degree + 1
n_control_points = len(self.control_points)
# Splines with to few control points can't be processed:
n_control_points_required = required_control_points(order)
if n_control_points < n_control_points_required:
auditor.fixed_error(
code=AuditError.INVALID_SPLINE_CONTROL_POINT_COUNT,
message=f"Removed {name} with invalid control point count: "
f"{n_control_points} < {n_control_points_required}"
)
auditor.trash(self)
return
n_weights = len(self.weights)
n_knots = len(self.knots)
n_knots_required = required_knot_values(
n_control_points, order)
if n_knots < n_knots_required:
# Can not fix entity: because the knot values are basic
# values which define the geometry of SPLINE.
auditor.fixed_error(
code=AuditError.INVALID_SPLINE_KNOT_VALUE_COUNT,
message=f"Removed {name} with invalid knot value count: "
f"{n_knots} < {n_knots_required}"
)
auditor.trash(self)
return
if n_weights and n_weights != n_control_points:
# Can not fix entity: because the weights are basic
# values which define the geometry of SPLINE.
auditor.fixed_error(
code=AuditError.INVALID_SPLINE_WEIGHT_COUNT,
message=f"Removed {name} with invalid weight count: "
f"{n_weights} != {n_control_points}"
)
auditor.trash(self)
return
def test_from_ellipse():
from ezdxf.entities import Ellipse
spline = Spline.from_arc(
Ellipse.new(
dxfattribs={
"center": (1, 1),
"major_axis": (2, 0),
"ratio": 0.5,
"start_param": 0.5, # radians
"end_param": 3,
"layer": "ellipse",
}))
assert spline.dxf.layer == "ellipse"
assert spline.dxf.degree == 2
assert len(spline.control_points) > 2
assert len(spline.weights) > 2
assert len(spline.fit_points) == 0
assert len(spline.knots) == required_knot_values(
len(spline.control_points), spline.dxf.degree + 1)