/*
   common/functions.cc
   This file is part of the Osirion project and is distributed under 
   the terms of the GNU General Public License version 2 
*/

// project headers
#include "math/functions.h"

namespace math {

float min(float a, float b) {
	return (a < b ? a : b);
}

float max(float a, float b) {
	return (a > b ? a : b);
}

int min(int a, int b) {
	return (a < b ? a : b);
}

int max(int a, int b) {
	return (a > b ? a : b);
}

float randomf(const float max) {
	return ((float) rand() / (float) RAND_MAX) * max;
}

unsigned randomi(const unsigned int max) {
	return ((unsigned int)(rand() % max));
}

float degrees180f(float angle) {	
	float r = angle;
	while (r <= -180.0f)
		r += 360.0f;
	while (r >= 180.0f)
		r -= 360.0f;
	return r;
}

float degrees360f(float angle) {	
	float r = angle;
	while (r < 0.0f)
		r += 360.0f;
	while (r >= 360.0f)
		r -= 360.0f;
	return r;
}

float sgnf(float value)
{
	if (value < 0 )
		return -1;
	else if (value == 0 )
		return 0;

	return 1;
}

} // namespace math