def build(angle, dx, dy, dz, axis, start, end, count):
ellipse = Ellipse.new(dxfattribs={
'start_param': start,
'end_param': end,
})
vertices = list(ellipse.vertices(ellipse.params(count)))
m = Matrix44.chain(Matrix44.axis_rotate(axis=axis, angle=angle),
Matrix44.translate(dx=dx, dy=dy, dz=dz))
return synced_transformation(ellipse, vertices, m)
def test_from_ellipse():
from ezdxf.entities import Ellipse
from ezdxf.math import ConstructionEllipse
e = ConstructionEllipse(center=(3, 0), major_axis=(1, 0), ratio=0.5,
start_param=0, end_param=math.pi)
ellipse = Ellipse.new()
ellipse.apply_construction_tool(e)
path = Path.from_ellipse(ellipse)
assert path.start == (4, 0)
assert path.end == (2, 0)
def _virtual_edge_path(path: EdgePath, dxfattribs: Dict, ocs: OCS,
elevation: float) -> List["DXFGraphic"]:
from ezdxf.entities import Line, Arc, Ellipse, Spline
def pnt_to_wcs(v):
return ocs.to_wcs(Vec3(v).replace(z=elevation))
def dir_to_wcs(v):
return ocs.to_wcs(v)
edges: List["DXFGraphic"] = []
for edge in path.edges:
attribs = dict(dxfattribs)
if isinstance(edge, LineEdge):
attribs["start"] = pnt_to_wcs(edge.start)
attribs["end"] = pnt_to_wcs(edge.end)
edges.append(Line.new(dxfattribs=attribs))
elif isinstance(edge, ArcEdge):
attribs["center"] = edge.center
attribs["radius"] = edge.radius
attribs["elevation"] = elevation
# Arcs angles are always stored in counter clockwise orientation
# around the extrusion vector!
attribs["start_angle"] = edge.start_angle
attribs["end_angle"] = edge.end_angle
attribs["extrusion"] = ocs.uz
edges.append(Arc.new(dxfattribs=attribs))
elif isinstance(edge, EllipseEdge):
attribs["center"] = pnt_to_wcs(edge.center)
attribs["major_axis"] = dir_to_wcs(edge.major_axis)
attribs["ratio"] = edge.ratio
# Ellipse angles are always stored in counter clockwise orientation
# around the extrusion vector!
attribs["start_param"] = edge.start_param
attribs["end_param"] = edge.end_param
attribs["extrusion"] = ocs.uz
edges.append(Ellipse.new(dxfattribs=attribs))
elif isinstance(edge, SplineEdge):
spline = Spline.new(dxfattribs=attribs)
spline.dxf.degree = edge.degree
spline.knots = edge.knot_values
spline.control_points = [
pnt_to_wcs(v) for v in edge.control_points
]
if edge.weights:
spline.weights = edge.weights
if edge.fit_points:
spline.fit_points = [pnt_to_wcs(v) for v in edge.fit_points]
if edge.start_tangent is not None:
spline.dxf.start_tangent = dir_to_wcs(edge.start_tangent)
if edge.end_tangent is not None:
spline.dxf.end_tangent = dir_to_wcs(edge.end_tangent)
edges.append(spline)
return edges
def build():
ellipse = Ellipse.new(dxfattribs={
'start_param': start,
'end_param': end,
})
vertices = list(ellipse.vertices(ellipse.params(vertex_count)))
m = Matrix44.chain(
Matrix44.axis_rotate(axis=Vec3.random(), angle=random.uniform(0, math.tau)),
Matrix44.translate(dx=random.uniform(-2, 2), dy=random.uniform(-2, 2), dz=random.uniform(-2, 2)),
)
return synced_transformation(ellipse, vertices, m)
def ellipse1():
return Ellipse.new(dxfattribs={
"center": (
298998.9237372455,
105908.98587737791,
0.0218015606544459,
),
"major_axis": (-2.005925505480262, 9.590684825374422e-13, 0.0),
"ratio":
0.6052078628034204,
"start_param":
7.898e-13,
"end_param":
7.878142582740111e-13,
"extrusion": (0.0, -0.0, 1.0),
}, )
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 ellipse(major_axis=(1, 0),
ratio: float = 0.5,
start: float = 0,
end: float = math.tau,
count: int = 8):
major_axis = Vector(major_axis).replace(z=0)
ellipse_ = Ellipse.new(dxfattribs={
'center': (0, 0, 0),
'major_axis': major_axis,
'ratio': min(max(ratio, 1e-6), 1),
'start_param': start,
'end_param': end
},
doc=doc)
control_vertices = list(ellipse_.vertices(ellipse_.params(count)))
axis_vertices = list(
ellipse_.vertices([0, math.pi / 2, math.pi, math.pi * 1.5]))
return ellipse_, control_vertices, axis_vertices
def test_upright_ellipse():
ellipse = Ellipse.new(
dxfattribs={
"center": (5, 5, 5),
"major_axis": (5, 0, 0),
"ratio": 0.5,
"start_param": 0.5,
"end_param": 1.5,
"extrusion": (0, 0, -1),
})
p0 = path.make_path(ellipse)
assert p0.has_curves is True
upright(ellipse)
assert ellipse.dxf.extrusion.isclose(Z_AXIS)
p1 = path.make_path(ellipse)
# has reversed vertex order of source entity:
assert path.have_close_control_vertices(p0, p1.reversed())
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 ellipse(
major_axis=(1, 0),
ratio: float = 0.5,
start: float = 0,
end: float = math.tau,
count: int = 8,
):
major_axis = Vec3(major_axis).replace(z=0)
ellipse_ = Ellipse.new(
dxfattribs={
"center": (0, 0, 0),
"major_axis": major_axis,
"ratio": min(max(ratio, 1e-6), 1),
"start_param": start,
"end_param": end,
},
doc=doc,
)
control_vertices = list(ellipse_.vertices(ellipse_.params(count)))
axis_vertices = list(
ellipse_.vertices([0, math.pi / 2, math.pi, math.pi * 1.5]))
return ellipse_, control_vertices, axis_vertices