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source: code/branches/gui/src/util/Math.h @ 1696

Last change on this file since 1696 was 1625, checked in by rgrieder, 16 years ago

merged hud branch back to trunk

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1/*
2 *   ORXONOX - the hottest 3D action shooter ever to exist
3 *                    > www.orxonox.net <
4 *
5 *
6 *   License notice:
7 *
8 *   This program is free software; you can redistribute it and/or
9 *   modify it under the terms of the GNU General Public License
10 *   as published by the Free Software Foundation; either version 2
11 *   of the License, or (at your option) any later version.
12 *
13 *   This program is distributed in the hope that it will be useful,
14 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
15 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 *   GNU General Public License for more details.
17 *
18 *   You should have received a copy of the GNU General Public License
19 *   along with this program; if not, write to the Free Software
20 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
21 *
22 *   Author:
23 *      Fabian 'x3n' Landau
24 *   Co-authors:
25 *      ...
26 *
27 */
28
29#ifndef _Util_Math_H__
30#define _Util_Math_H__
31
32#include "UtilPrereqs.h"
33
34#include <ostream>
35#include <string>
36
37#include <OgreMath.h>
38#include <OgreVector2.h>
39#include <OgreVector3.h>
40#include <OgreVector4.h>
41#include <OgreMatrix3.h>
42#include <OgreMatrix4.h>
43#include <OgreQuaternion.h>
44#include <OgreColourValue.h>
45
46namespace orxonox
47{
48  typedef Ogre::Radian Radian;
49  typedef Ogre::Degree Degree;
50  typedef Ogre::Vector2 Vector2;
51  typedef Ogre::Vector3 Vector3;
52  typedef Ogre::Vector4 Vector4;
53  typedef Ogre::Matrix3 Matrix3;
54  typedef Ogre::Matrix4 Matrix4;
55  typedef Ogre::Quaternion Quaternion;
56  typedef Ogre::ColourValue ColourValue;
57}
58
59_UtilExport std::ostream& operator<<(std::ostream& out, const orxonox::Radian& radian);
60_UtilExport std::istream& operator>>(std::istream& in, orxonox::Radian& radian);
61_UtilExport std::ostream& operator<<(std::ostream& out, const orxonox::Degree& degree);
62_UtilExport std::istream& operator>>(std::istream& in, orxonox::Degree& degree);
63
64_UtilExport float getAngle(const orxonox::Vector3& myposition, const orxonox::Vector3& mydirection, const orxonox::Vector3& otherposition);
65_UtilExport orxonox::Vector2 get2DViewdirection(const orxonox::Vector3& myposition, const orxonox::Vector3& mydirection, const orxonox::Vector3& myorthonormal, const orxonox::Vector3& otherposition);
66_UtilExport orxonox::Vector2 get2DViewcoordinates(const orxonox::Vector3& myposition, const orxonox::Vector3& mydirection, const orxonox::Vector3& myorthonormal, const orxonox::Vector3& otherposition);
67_UtilExport orxonox::Vector3 getPredictedPosition(const orxonox::Vector3& myposition, float projectilespeed, const orxonox::Vector3& targetposition, const orxonox::Vector3& targetvelocity);
68
69template <typename T>
70inline T sgn(T x)
71{
72    return (x >= 0) ? 1 : -1;
73}
74
75template <typename T>
76inline T min(T a, T b)
77{
78    return (a <= b) ? a : b;
79}
80
81template <typename T>
82inline T max(T a, T b)
83{
84    return (a >= b) ? a : b;
85}
86
87template <typename T>
88inline T clamp(T x, T min, T max)
89{
90    if (x < min)
91        return min;
92
93    if (x > max)
94        return max;
95
96    return x;
97}
98
99template <typename T>
100inline T square(T x)
101{
102    return x*x;
103}
104
105template <typename T>
106inline T cube(T x)
107{
108    return x*x*x;
109}
110
111template <typename T>
112inline int floor(T x)
113{
114    return (int)(x);
115}
116
117template <typename T>
118inline int ceil(T x)
119{
120    int temp = floor(x);
121    return (temp != x) ? (temp + 1) : temp;
122}
123
124template <typename T>
125inline int round(T x)
126{
127    return (int)(x + 0.5);
128}
129
130template <typename T>
131inline int mod(T x, int max)
132{
133    if (x >= 0)
134        return (x % max);
135    else
136        return ((x % max) + max);
137}
138
139template <typename T>
140T interpolate(float time, const T& start, const T& end)
141{
142    return time * (end - start) + start;
143}
144
145template <typename T>
146T interpolateSmooth(float time, const T& start, const T& end)
147{
148    return (-2 * (end - start) * cube(time)) + (3 * (end - start) * square(time)) + start;
149}
150
151inline _UtilExport float rnd()
152{
153    return ((float)rand() / RAND_MAX);
154}
155
156inline _UtilExport float rnd(float max)
157{
158    return rnd() * max;
159}
160
161inline _UtilExport float rnd(float min, float max)
162{
163    return rnd(max - min) + min;
164}
165
166_UtilExport unsigned long getUniqueNumber();
167_UtilExport std::string getUniqueNumberStr();
168
169class _UtilExport IntVector2
170{
171public:
172  IntVector2() : x(0), y(0) { }
173  IntVector2(int _x, int _y) : x(_x), y(_y) { }
174  int x;
175  int y;
176};
177
178class _UtilExport IntVector3
179{
180public:
181  IntVector3() : x(0), y(0), z(0) { }
182  IntVector3(int _x, int _y, int _z) : x(_x), y(_y), z(_z) { }
183  int x;
184  int y;
185  int z;
186};
187
188#endif /* _Util_Math_H__ */
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