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from cython cimport numeric
from libcpp.vector cimport vector
from libcpp.utility cimport pair
"""This file is part of the Gudhi Library. The Gudhi library
(Geometric Understanding in Higher Dimensions) is a generic C++
library for computational topology.
Author(s): Vincent Rouvreau
Copyright (C) 2016 Inria
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
__author__ = "Vincent Rouvreau"
__copyright__ = "Copyright (C) 2016 Inria"
__license__ = "GPL v3"
cdef extern from "Strong_witness_complex_interface.h" namespace "Gudhi":
cdef cppclass Strong_witness_complex_interface "Gudhi::witness_complex::Strong_witness_complex_interface":
Strong_witness_complex_interface(vector[vector[pair[size_t, double]]] nearest_landmark_table)
void create_simplex_tree(Simplex_tree_interface_full_featured* simplex_tree, double max_alpha_square)
void create_simplex_tree(Simplex_tree_interface_full_featured* simplex_tree, double max_alpha_square,
unsigned limit_dimension)
# StrongWitnessComplex python interface
cdef class StrongWitnessComplex:
"""Constructs (strong) witness complex for a given table of nearest
landmarks with respect to witnesses.
"""
cdef Strong_witness_complex_interface * thisptr
# Fake constructor that does nothing but documenting the constructor
def __init__(self, nearest_landmark_table=None):
"""StrongWitnessComplex constructor.
:param nearest_landmark_table: A list of nearest landmark.
:type nearest_landmark_table: list of list of pair of unsigned and double
"""
# The real cython constructor
def __cinit__(self, nearest_landmark_table=None):
if nearest_landmark_table is not None:
self.thisptr = new Strong_witness_complex_interface(nearest_landmark_table)
def __dealloc__(self):
if self.thisptr != NULL:
del self.thisptr
def __is_defined(self):
"""Returns true if StrongWitnessComplex pointer is not NULL.
"""
return self.thisptr != NULL
def create_simplex_tree(self, max_alpha_square, limit_dimension = -1):
"""
:param max_alpha_square: The maximum alpha square threshold the
simplices shall not exceed. Default is set to infinity.
:type max_alpha_square: float
:returns: A simplex tree created from the Delaunay Triangulation.
:rtype: SimplexTree
"""
simplex_tree = SimplexTree()
if limit_dimension is not -1:
self.thisptr.create_simplex_tree(simplex_tree.thisptr, max_alpha_square, limit_dimension)
else:
self.thisptr.create_simplex_tree(simplex_tree.thisptr, max_alpha_square)
return simplex_tree
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