1 /* CPML - Cairo Path Manipulation Library
2 * Copyright (C) 2008, Nicola Fontana <ntd at entidi.it>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
20 #ifndef __CPML_PAIR_H__
21 #define __CPML_PAIR_H__
28 typedef struct _CpmlPair CpmlPair
;
29 typedef struct _CpmlPair CpmlVector
;
36 CpmlPair
* cpml_pair_copy (CpmlPair
*pair
,
39 void cpml_pair_negate (CpmlPair
*pair
);
40 cairo_bool_t
cpml_pair_invert (CpmlPair
*pair
);
41 void cpml_pair_add (CpmlPair
*pair
,
43 void cpml_pair_sub (CpmlPair
*pair
,
45 void cpml_pair_mul (CpmlPair
*pair
,
47 cairo_bool_t
cpml_pair_div (CpmlPair
*pair
,
49 void cpml_pair_transform (CpmlPair
*pair
,
50 const cairo_matrix_t
*matrix
);
51 double cpml_pair_squared_distance (const CpmlPair
*from
,
53 double cpml_pair_distance (const CpmlPair
*from
,
56 CpmlVector
* cpml_vector_from_pair (CpmlVector
*vector
,
59 CpmlVector
* cpml_vector_from_angle (CpmlVector
*vector
,
62 double cpml_vector_angle (const CpmlVector
*vector
);
63 void cpml_vector_set_length (CpmlVector
*vector
,
65 void cpml_vector_normal (CpmlVector
*vector
);
71 #endif /* __CPML_PAIR_H__ */