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# -*-cython-*-
"""
Qhull shared definitions, for use by other Cython modules
"""
#
# Copyright (C) Pauli Virtanen, 2010.
#
# Distributed under the same BSD license as Scipy.
#
cdef extern from "numpy/ndarrayobject.h":
cdef enum:
NPY_MAXDIMS
ctypedef struct DelaunayInfo_t:
int ndim
int npoints
int nsimplex
double *points
int *simplices
int *neighbors
double *equations
double *transform
int *vertex_to_simplex
double paraboloid_scale
double paraboloid_shift
double *max_bound
double *min_bound
int *vertex_neighbors_indices
int *vertex_neighbors_indptr
cdef int _get_delaunay_info(DelaunayInfo_t *, obj,
int compute_transform,
int compute_vertex_to_simplex,
int compute_vertex_neighbors) except -1
#
# N-D geometry
#
cdef int _barycentric_inside(int ndim, double *transform,
double *x, double *c, double eps) nogil
cdef void _barycentric_coordinate_single(int ndim, double *transform,
double *x, double *c, int i) nogil
cdef void _barycentric_coordinates(int ndim, double *transform,
double *x, double *c) nogil
#
# N+1-D geometry
#
cdef void _lift_point(DelaunayInfo_t *d, double *x, double *z) nogil
cdef double _distplane(DelaunayInfo_t *d, int isimplex, double *point) nogil
#
# Finding simplices
#
cdef int _is_point_fully_outside(DelaunayInfo_t *d, double *x, double eps) nogil
cdef int _find_simplex_bruteforce(DelaunayInfo_t *d, double *c, double *x,
double eps, double eps_broad) nogil
cdef int _find_simplex_directed(DelaunayInfo_t *d, double *c, double *x,
int *start, double eps, double eps_broad) nogil
cdef int _find_simplex(DelaunayInfo_t *d, double *c, double *x, int *start,
double eps, double eps_broad) nogil
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