"""Provide the :func:`self_intersections` and :func:`curve_intersections` function."""
from typing import Dict, List, Any
from fibomat.shapes import ArcSpline
from fibomat import _libfibomat
[docs]def self_intersections(curve: ArcSpline) -> Dict[str, List[Dict[str, Any]]]:
"""Self intersections of curve.
Args:
curve (ArcSpline): curve
Returns:
Dict[str, List[Dict[str, Any]]]:
dict with key 'intersections'. 'intersections' contains list where each element is a dict with keys 'seg_1',
'seg_2', and 'pos' where the former two elements contain the indices of the segments where the intersection
occurs and the latter the position of the intersection.
"""
return {
'intersections': [
{'seg_1': s1, 'seg_2': s2, 'pos': pos} for s1, s2, pos in
_libfibomat.self_intersections(curve.arc_spline_impl)
]
}
[docs]def curve_intersections(curve_1: ArcSpline, curve_2: ArcSpline) -> Dict[str, List[Dict[str, Any]]]:
"""Intersections between curves.
Args:
curve_1 (ArcSpline): first curve
curve_2 (ArcSpline): second curve
.. todo:: what is seg_1, seg_2 in coincidences?
Returns:
Dict[str, List[Dict[str, Any]]]:
dict with key 'intersections' and 'coincidences'. 'intersections' contains list where each element is a dict
with keys 'seg_1', 'seg_2', and 'pos' where the former two elements contain the indices of the segments
where the intersection occurs and the latter the position of the intersection. 'coincidences' contains a
list where each element is a dict with keys 'seg_1', 'seg_2', 'start_pos' and 'end_pos'. 'start_pos' and
'end_pos' indicate the range where the two curves lie on each other.
"""
intersection, coincidences = _libfibomat.curve_intersections(curve_1.arc_spline_impl, curve_2.arc_spline_impl)
return {
'intersections': [
{'seg_1': s1, 'seg_2': s2, 'pos': pos} for s1, s2, pos in intersection
],
'coincidences': [
{'seg_1': s1, 'seg_2': s2, 'start_pos': start, 'end_pos': end} for s1, s2, start, end in coincidences
]
}