2007-11-25 19:42:40 +00:00
|
|
|
/* copyright (c) 2007 magnus auvinen, see licence.txt for more info */
|
2007-08-22 07:52:33 +00:00
|
|
|
#ifndef BASE_MATH_H
|
|
|
|
#define BASE_MATH_H
|
|
|
|
|
2008-01-12 17:09:00 +00:00
|
|
|
#include <stdlib.h>
|
|
|
|
|
2007-08-22 07:52:33 +00:00
|
|
|
template <typename T>
|
|
|
|
inline T clamp(T val, T min, T max)
|
|
|
|
{
|
|
|
|
if(val < min)
|
|
|
|
return min;
|
|
|
|
if(val > max)
|
|
|
|
return max;
|
|
|
|
return val;
|
|
|
|
}
|
|
|
|
|
|
|
|
inline float sign(float f)
|
|
|
|
{
|
|
|
|
return f<0.0f?-1.0f:1.0f;
|
|
|
|
}
|
|
|
|
|
2008-11-16 22:07:46 +00:00
|
|
|
inline int round(float f)
|
|
|
|
{
|
|
|
|
if(f > 0)
|
|
|
|
return (int)(f+0.5f);
|
|
|
|
return (int)(f-0.5f);
|
|
|
|
}
|
|
|
|
|
2007-08-22 07:52:33 +00:00
|
|
|
template<typename T, typename TB>
|
|
|
|
inline T mix(const T a, const T b, TB amount)
|
|
|
|
{
|
|
|
|
return a + (b-a)*amount;
|
|
|
|
}
|
2008-01-12 17:09:00 +00:00
|
|
|
|
|
|
|
inline float frandom() { return rand()/(float)(RAND_MAX); }
|
|
|
|
|
2008-02-02 12:38:36 +00:00
|
|
|
// float to fixed
|
|
|
|
inline int f2fx(float v) { return (int)(v*(float)(1<<10)); }
|
|
|
|
inline float fx2f(int v) { return v*(1.0f/(1<<10)); }
|
|
|
|
|
|
|
|
class fxp
|
|
|
|
{
|
|
|
|
int value;
|
|
|
|
public:
|
|
|
|
void set(int v) { value = v; }
|
|
|
|
int get() const { return value; }
|
|
|
|
fxp &operator = (int v) { value = v<<10; return *this; }
|
|
|
|
fxp &operator = (float v) { value = (int)(v*(float)(1<<10)); return *this; }
|
|
|
|
operator float() const { return value/(float)(1<<10); }
|
|
|
|
};
|
|
|
|
|
|
|
|
class tune_param
|
|
|
|
{
|
|
|
|
int value;
|
|
|
|
public:
|
|
|
|
void set(int v) { value = v; }
|
|
|
|
int get() const { return value; }
|
|
|
|
tune_param &operator = (int v) { value = (int)(v*100.0f); return *this; }
|
|
|
|
tune_param &operator = (float v) { value = (int)(v*100.0f); return *this; }
|
|
|
|
operator float() const { return value/100.0f; }
|
|
|
|
};
|
|
|
|
|
2007-08-22 07:52:33 +00:00
|
|
|
const float pi = 3.1415926535897932384626433f;
|
|
|
|
|
|
|
|
template <typename T> inline T min(T a, T b) { return a<b?a:b; }
|
|
|
|
template <typename T> inline T max(T a, T b) { return a>b?a:b; }
|
|
|
|
|
|
|
|
#endif // BASE_MATH_H
|