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1 | /* |
2 | * Copyright (C) 2008 Patrik Gornicz, Gornicz_P (at) hotmail (dot) com. | |
3 | * | |
4 | * This program is free software: you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation, either version 3 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program 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 | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
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18 | #include "mathw.h" |
19 | ||
20 | ||
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21 | /// ***** Public Methods ***** |
22 | ||
23 | int mod(int x, int y) | |
24 | { | |
25 | return x % y + (x < 0 ? y : 0); | |
26 | } | |
27 | ||
617dcc71 | 28 | // Vector2 Math |
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29 | |
30 | Vector2 perp(const Vector2& vec) | |
31 | { | |
32 | return Vector2(-vec.y, vec.x); | |
33 | } | |
34 | ||
35 | float dot(const Vector2& vec1, const Vector2& vec2) | |
36 | { | |
37 | return vec1.x * vec2.x + vec1.y * vec2.y; | |
38 | } | |
39 | ||
40 | //TODO float Vector2::projectionCoeff(const Vector2* vec) const; | |
41 | //TODO Vector2* Vector2::projection(const Vector2* vec) const; | |
42 |