Class Face

Create a face instance.

Parameters:

• index (int) - the index of this face
• indices (list) - the indices of points making up this face
• points (list of numpy.array) - the points making up this face
• num_unique (int) - the number of symmetry unique edges per face

Overrides: object.__init__

Return a list of Edge.

Returns: list

contains all Edge for this face

Return a list containing the num_unique number of unique edges. These will be the reference edges used to orient the reference face of the polyhedron.

Parameters:

• edges (list) - all Edge objects for this face
• num_unique (int) - the number of symmetry unique edges per face

Returns: list

unique Edge objects to serve as references

Return the intersection point of the specified line segment and the plane in which this face resides or return None if there is no intersection.

Parameters:

• line_start (numpy.array) - the starting point of the line segment
• line_end (numpy.array) - the ending point of the line segment
• inf_nan_thresh (float) - this parameter handles numerical precision for inf and nan cases
• distance_thresh (float) - this parameter controls how the intersection of line segment end-points and a plane are handled for cases where one of the end-points lies in (or near) the plane (see the comment near the module level constant DISTANCE_THRESH)

Returns: numpy.array or None

the single point of intersection along the line segment or None if there is no intersection

Return true if the query point lies on or inside the boundaries of this face, false otherwise.

Parameters:

• point (numpy.array) - a query point

Returns: bool

true if the query point lies on or inside the face boundaries, false otherwise