RhinoNurbsCurve

class compas_rhino.geometry.RhinoNurbsCurve(*args, **kwargs)[source]

Bases: compas.geometry.curves.nurbs.NurbsCurve

Class representing a NURBS curve based on the NurbsCurve of Rhino.Geometry.

Attributes

points (list of compas.geometry.Point) – The control points of the curve.
weights (list of float) – The weights of the control points.
knots (list of float) – The knot vector, without duplicates.
multiplicities (list of int) – The multiplicities of the knots in the knot vector.
knotsequence (list of float) – The knot vector, with repeating values according to the multiplicities.
degree (int) – The degree of the polynomials.
order (int) – The order of the curve.
domain (tuple of float) – The parameter domain.
start (compas.geometry.Point) – The point corresponding to the start of the parameter domain.
end (compas.geometry.Point) – The point corresponding to the end of the parameter domain.
is_closed (bool) – True if the curve is closed.
is_periodic (bool) – True if the curve is periodic.
is_rational (bool) – True is the curve is rational.

References

2: https://developer.rhino3d.com/api/RhinoCommon/html/T_Rhino_Geometry_NurbsCurve.htm
3: https://en.wikipedia.org/wiki/Non-uniform_rational_B-spline
4: https://developer.rhino3d.com/guides/opennurbs/nurbs-geometry-overview/

Attributes

`data`	The representation of the object as native Python data.
`degree`	The degree of the curve (degree = order - 1).
`dimension`	The dimension of the curve.
`domain`	The parameter domain of the curve.
`end`	The point at the end of the curve.
`is_closed`	bool
`is_periodic`	bool
`is_rational`	bool
`knots`	Knots without repeating elements.
`knotsequence`	Knots with multiplicities.
`multiplicities`	Multiplicities of the knots.
`order`	The order of the curve (order = degree + 1).
`points`	The control points.
`start`	The point at the start of the curve.
`weights`	The weights of the control points.

Inherited Attributes

`DATASCHEMA`	The schema of the data of this object.
`JSONSCHEMA`	The schema of the JSON representation of the data of this object.
`JSONSCHEMANAME`
`bounding_box`
`dtype`	The type of the object in the form of a '2-level' import and a class name.
`guid`	The globally unique identifier of the object.
`jsondefinitions`	Reusable schema definitions.
`jsonstring`	The representation of the object data in JSON format.
`jsonvalidator`	JSON schema validator for draft 7.
`name`	The name of the object.

Methods

`aabb`	Compute the axis aligned bounding box of the curve.
`closest_point`	Compute the closest point on the curve to a given point.
`copy`	Make an independent copy of the current curve.
`curvature_at`	Compute the curvature at a point on the curve.
`divide_by_count`	Divide the curve into a specific number of equal length segments.
`divide_by_length`	Divide the curve into segments of specified length.
`frame_at`	Compute the local frame at a point on the curve.
`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_parameters`	Construct a NURBS curve from explicit curve parameters.
`from_points`	Construct a NURBS curve from control points.
`from_rhino`	Construct a NURBS curve from an existing Rhino curve.
`from_step`	Load a NURBS curve from an STP file.
`length`	Compute the length of the curve.
`locus`	Compute the locus of the curve.
`obb`	Compute the oriented bounding box of the curve.
`point_at`	Compute a point on the curve.
`reverse`	Reverse the parametrisation of the curve.
`segment`	Modifies this curve by segmenting it between the parameters u and v.
`segmented`	Returns a copy of this curve by segmenting it between the parameters u and v.
`space`	Compute evenly spaced parameters over the curve domain.
`tangent_at`	Compute the tangent vector at a point on the curve.
`to_line`	Convert the NURBS curve to a line.
`to_polyline`	Convert the NURBS curve to a polyline.
`to_step`	Write the curve geometry to a STP file.
`transform`	Transform this curve.
`transformed`	Transform a copy of the curve.
`xyz`	Compute point locations corresponding to evenly spaced parameters over the curve domain.

Inherited Methods

`fair`
`from_data`	Construct a NURBS curve from its data representation.
`from_json`	Construct an object from serialized data contained in a JSON file.
`from_jsonstring`	Construct an object from serialized data contained in a JSON string.
`to_data`	Convert an object to its native data representation.
`to_json`	Serialize the data representation of an object to a JSON file.
`to_jsonstring`	Serialize the data representation of an object to a JSON string.
`validate_data`	Validate the object's data against its data schema (self.DATASCHEMA).
`validate_json`	Validate the object's data against its json schema (self.JSONSCHEMA).

RhinoNurbsCurve

COMPAS