NurbsCurve

class compas.geometry.NurbsCurve

Bases: Curve

A NURBS curve is defined by control points, weights, knots, and a degree.

Parameters:

namestr, optional

The name of the curve.

Attributes:

pointslist[compas.geometry.Point], read-only

The control points.

weightslist[float], read-only

The weights of the control points.

knotslist[float], read-only

The knots, without multiplicity.

knotsequencelist[float], read-only

The complete knot vector.

multiplicitylist[int], read-only

The multiplicities of the knots.

continuityint, read-only

The degree of continuity of the curve.

degreeint, read-only

The degree of the curve.

orderint, read-only

The order of the curve (degree + 1).

Methods

copy	Make an independent copy of the current curve.
elevate_degree
from_arc	Construct a NURBS curve from an arc.
from_circle	Construct a NURBS curve from a circle.
from_ellipse	Construct a NURBS curve from an ellipse.
from_interpolation	Construct a NURBS curve by interpolating a set of points.
from_line	Construct a NURBS curve from a line.
from_native	Construct a NURBS curve from a CAD-native curve geometry.
from_parameters	Construct a NURBS curve from explicit curve parameters.
from_points	Construct a NURBS curve from control points.
from_step	Load a NURBS curve from an STP file.
insert_knot
reduce_degree
refine_knot
remove_knot

Inherited Methods

ToString	Converts the instance to a string.
aabb	Compute the axis-aligned bounding box of the curve.
closest_point	Compute the closest point on the curve to a given point.
compute_aabb	Compute the axis-aligned bounding box of the geometry.
compute_obb	Compute the oriented bounding box of the geometry.
curvature_at	Compute the curvature vector of the curve at a parameter.
divide_by_count	Compute the curve parameters that divide the curve into a specific number of equal length segments.
divide_by_length	Compute the curve parameters that divide the curve into segments of specified length.
fair
frame_at	Compute the local frame of the curve at a parameter.
from_json	Construct an object of this type from a JSON file.
from_jsonstring	Construct an object of this type from a JSON string.
from_obj	Load a curve from an OBJ file.
length	Compute the length of the curve.
normal_at	Compute the normal of the curve at a parameter.
offset
point_at	Compute a point of the curve at a parameter.
reverse	Reverse the parametrisation of the curve.
reversed	Reverse a copy of the curve.
rotate	Rotate the geometry.
rotated	Returns a rotated copy of this geometry.
scale	Scale the geometry.
scaled	Returns a scaled copy of this geometry.
sha256	Compute a hash of the data for comparison during version control using the sha256 algorithm.
smooth
split
tangent_at	Compute the tangent vector of the curve at a parameter.
to_json	Convert an object to its native data representation and save it to a JSON file.
to_jsonstring	Convert an object to its native data representation and save it to a JSON string.
to_obj	Write the curve geometry to an OBJ file.
to_points	Convert the curve to a list of points.
to_polygon	Convert the curve to a polygon.
to_polyline	Convert the curve to a polyline.
to_step	Write the curve geometry to a STP file.
transform	Transform the local coordinate system of the curve.
transformed	Returns a transformed copy of this geometry.
translate	Translate the geometry.
translated	Returns a translated copy of this geometry.
trim
validate_data	Validate the data against the object's data schema.