t8_geometry_helpers.h

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/*
  This file is part of t8code.
  t8code is a C library to manage a collection (a forest) of multiple
  connected adaptive space-trees of general element classes in parallel.
 
  Copyright (C) 2015 the developers
 
  t8code 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 2 of the License, or
  (at your option) any later version.
 
  t8code 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 t8code; if not, write to the Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
 
#ifndef T8_GEOMETRY_HELPERS_H
#define T8_GEOMETRY_HELPERS_H
 
#include <t8.h>
 
T8_EXTERN_C_BEGIN ();
 
void
t8_geom_compute_linear_geometry (t8_eclass_t tree_class, const double *tree_vertices, const double *ref_coords,
                                 const size_t num_coords, double *out_coords);
 
void
t8_geom_compute_linear_axis_aligned_geometry (t8_eclass_t tree_class, const double *tree_vertices,
                                              const double *ref_coords, const size_t num_coords, double *out_coords);
 
void
t8_geom_linear_interpolation (const double *coefficients, const double *corner_values, int corner_value_dim,
                              int interpolation_dim, double *evaluated_function);
 
void
t8_geom_triangular_interpolation (const double *coefficients, const double *corner_values, int corner_value_dim,
                                  int interpolation_dim, double *evaluated_function);
 
void
t8_geom_get_face_vertices (t8_eclass_t tree_class, const double *tree_vertices, int face_index, int dim,
                           double *face_vertices);
 
void
t8_geom_get_edge_vertices (t8_eclass_t tree_class, const double *tree_vertices, int edge_index, int dim,
                           double *edge_vertices);
 
void
t8_geom_get_ref_intersection (int edge_index, const double *ref_coords, double ref_intersection[2]);
 
double
t8_geom_get_triangle_scaling_factor (int edge_index, const double *tree_vertices, const double *glob_intersection,
                                     const double *glob_ref_point);
 
T8_EXTERN_C_END ();
 
#endif /* !T8_GEOMETRY_HELPERS_H! */