Spline3D

Canonical path: NemAll_Python_Geometry.Spline3D

Bases: PolyPoints3D

class for 3D spline geometry

Methods:

• CalculateEndVector –

  Calculates end vector

• CalculatePoint –

  Overloaded function. See individual overloads.

• CalculateStartVector –

  Calculates start vector

• CreateClosedSpline –

  Create closed spline from given points

• GetControlPoints –

  Compute bezier control points

• GetEndVector –

  Get end vector.

• GetStartVector –

  Get start vector.

• IsClosed –

  Check if spline is closed ( first/last points are equal )

• IsCollinear –

  Function checks if the 3D spline is collinear - all control points are on same line

• IsPlanar –

  Function checks if the 3D spline is planar, if yes sets the plane

• Reverse –

  Reverse of current spline

• SetEndVector –

  Set end vector.

• SetStartVector –

  Set start vector.

• __eq__ –

  Comparison of splines.

• __init__ –

  Overloaded function. See individual overloads.

• __repr__ –

  Convert to string

Attributes:

• EndVector (Vector3D) –

  Get end vector.

• IsPeriodic (bool) –

  Check if spline is periodic ( first/last points are equal + start and end tangents are equal)

• StartVector (Vector3D) –

  Get start vector.

EndVector property writable

EndVector: Vector3D

Get end vector.

IsPeriodic property writable

IsPeriodic: bool

Check if spline is periodic ( first/last points are equal + start and end tangents are equal)

StartVector property writable

StartVector: Vector3D

Get start vector.

CalculateEndVector

CalculateEndVector() -> Vector3D

Calculates end vector

Returns:

• Vector3D –

  End vector

CalculatePoint overloaded staticmethod

CalculatePoint(param: float) -> Point3D

Calculates point on spline

Parameters:

• param (float) –

  parameter of spline.

Returns:

• Point3D –

  Resulting point

CalculatePoint(param: float, cpoints: Point3DList) -> Point3D

Calculates point on spline

Parameters:

• param (float) –

  parameter of spline.

• cpoints (Point3DList) –

  control points of spline.

Returns:

• Point3D –

  Resulting point

CalculateStartVector

CalculateStartVector() -> Vector3D

Calculates start vector

Returns:

• Vector3D –

  Start vector

CreateClosedSpline staticmethod

CreateClosedSpline(points: Point3DList) -> Spline3D

Create closed spline from given points

Parameters:

• points (Point3DList) –

  Points

Returns:

• Spline3D –

  Spline

GetControlPoints

GetControlPoints() -> tuple[eGeometryErrorCode, list[Point3D]]

Compute bezier control points

Returns:

• tuple[eGeometryErrorCode, list[Point3D]] –

  tuple(error code, vector of control points)

GetEndVector

GetEndVector() -> Vector3D

Get end vector.

Returns:

• Vector3D –

  constant the end vector.

GetStartVector

GetStartVector() -> Vector3D

Get start vector.

Returns:

• Vector3D –

  constant the start vector.

IsClosed

IsClosed() -> bool

Check if spline is closed ( first/last points are equal )

Returns:

• bool –

  closed spline true/false

IsCollinear

IsCollinear() -> bool

Function checks if the 3D spline is collinear - all control points are on same line

Returns:

• bool –

  true if collinear

IsPlanar

IsPlanar() -> tuple[bool, Plane3D]

Function checks if the 3D spline is planar, if yes sets the plane

Returns:

• tuple[bool, Plane3D] –

  tuple(true if planar, the plane the spline is laying on)

Reverse

Reverse()

Reverse of current spline

Method reverse Spline using reverse from PolyPoints and swapping tangents.

SetEndVector

SetEndVector(vec: Vector3D)

Set end vector.

Parameters:

• vec (Vector3D) –

  new end vector.

SetStartVector

SetStartVector(vec: Vector3D)

Set start vector.

Parameters:

• vec (Vector3D) –

  new start vector.

__eq__

__eq__(spline: Spline3D) -> bool

Comparison of splines.

Be careful, this method work without tolerance!

Parameters:

• spline (Spline3D) –

  spline to be compared.

Returns:

• bool –

  True when splines are equal, otherwise false.

__init__ overloaded

__init__()

Initialize

__init__(splinePoints: list[Point3D])

constructor.

__init__(spline: Spline3D)

Copy constructor.

Parameters:

• spline (Spline3D) –

  Spline which will be copied.

__init__(spline: Spline2D, zPlane: float = 0)

Copy constructor.

Parameters:

• spline (Spline2D) –

  Spline which will be copied.

• zPlane (float, default: 0 ) –

  Z plane for the spline

__repr__

__repr__() -> str

Convert to string

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