pointsseq

Sequences of Points.

class nutils.pointsseq.PointsSequence(ndims)

Bases: Singleton

Abstract base class for a sequence of Points.

Parameters:: ndims (int) – The dimension of the point coordinates.

ndims

The dimension of the point coordinates.

Type:: int

Notes

Subclasses must implement __len__() and get().

static from_iter(value, ndims)

Create a PointsSequence from an iterator.

Parameters:

value (iterable of Points objects)
ndims (int)

Returns:

sequence

Return type:

PointsSequence

static uniform(value, length)

Create a uniform PointsSequence.

Parameters:

value (Points)
length (int)

Returns:

sequence

Return type:

PointsSequence

static empty(ndims)

Create an empty PointsSequence.

Parameters:: ndims (int)
Returns:: sequence
Return type:: PointsSequence

property npoints: int: The total number of points in this sequence.

__bool__(self): Return bool(self).

abstractmethod __len__(self): Return len(self).

__iter__(self): Implement iter(self).

__getitem__(index: int) → Points
__getitem__(index: slice | ndarray) → PointsSequence: Return self[index].

__add__(self, other): Return self+other.

__mul__(other: int) → Points
__mul__(other: PointsSequence) → PointsSequence: Return self*other.

abstractmethod get(self, index)

Return the points at index.

Parameters:: index (int)
Returns:: points – The points at index.
Return type:: Points

take(self, indices)

Return a selection of this sequence.

Parameters:: indices (numpy.ndarray, ndim: 1, dtype: int) – The indices of points of this sequence to select.
Returns:: points – The sequence of selected points.
Return type:: PointsSequence

compress(self, mask)

Return a selection of this sequence.

Parameters:: mask (numpy.ndarray, ndim: 1, dtype: bool) – A boolean mask of points of this sequence to select.
Returns:: sequence – The sequence of selected points.
Return type:: PointsSequence

repeat(self, count)

Return this sequence repeated count times.

Parameters:: count (int)
Returns:: sequence – This sequence repeated count times.
Return type:: PointsSequence

product(self, other)

Return the product of this sequence with another sequence.

Parameters:: other (PointsSequence)
Returns:: sequence – This product sequence.
Return type:: PointsSequence

chain(self, other)

Return the chained sequence of this sequence with other.

Parameters:: other (PointsSequence)
Returns:: sequence – The chained sequence.
Return type:: PointsSequence

property tri: ndarray

Triangulation of interior.

A two-dimensional integer array with ndims+1 columns, of which every row defines a simplex by mapping vertices into the list of points.

property hull: ndarray

Triangulation of the exterior hull.

A two-dimensional integer array with ndims columns, of which every row defines a simplex by mapping vertices into the list of points. Note that the hull often does contain internal element boundaries as the triangulations originating from separate elements are disconnected.