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Diffstat (limited to 'src/basis.h')
| -rw-r--r-- | src/basis.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/basis.h b/src/basis.h new file mode 100644 index 0000000..f076096 --- /dev/null +++ b/src/basis.h @@ -0,0 +1,49 @@ +/* + * Basis sets for pseudospectral methods + * Copyright (C) 2016 Anton Khirnov <anton@khirnov.net> + * + * 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/>. + */ + +#ifndef QMS_BASIS_H +#define QMS_BASIS_H + +/* a set of basis functions */ +typedef struct BasisSet { + /* evaluate the idx-th basis function at the specified point*/ + double (*eval) (double coord, int idx); + /* evaluate the first derivative of the idx-th basis function at the specified point*/ + double (*eval_diff1)(double coord, int idx); + /* evaluate the second derivative of the idx-th basis function at the specified point*/ + double (*eval_diff2)(double coord, int idx); + /** + * Get the idx-th collocation point for the specified order. + * idx runs from 0 to order - 1 (inclusive) + */ + double (*colloc_point)(int order, int idx); +} BasisSet; + +extern const BasisSet qms_cheb_basis; +extern const BasisSet qms_cheb_even_basis; +extern const BasisSet qms_full_basis; +extern const BasisSet qms_tb_even_basis; +extern const BasisSet qms_sb_even_basis; +extern const BasisSet qms_sb_odd_basis; +extern const BasisSet qms_tl_basis; +extern const BasisSet qms_cos_even_basis; + +#define SCALE_FACTOR scale_factor +extern double scale_factor; + +#endif /* QMS_BASIS_H */ |