utils.h

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#ifndef __UTILS_H__
#define __UTILS_H__

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>
#include <signal.h>
#include <errno.h>
#include <string.h>
#include <assert.h>

#ifndef TRUE
  #define TRUE 1
#endif

#ifndef FALSE
  #define FALSE 0
#endif

#ifndef MIN
  #define MIN(a,b) ((a)<(b)?(a):(b))
#endif

#ifndef MAX
  #define MAX(a,b) ((a)>(b)?(a):(b))
#endif

#ifndef ABS
 #define ABS(x) ((x)<0?-(x):(x))
#endif

#if !defined(SIGN)
  #define SIGN(x) ((x) < 0 ? -1 : ((x) > 0 ? 1 : 0))
#endif

#ifndef PI
 #define PI 3.1415926535897932385f
#endif
#ifndef HALF_PI
  #define HALF_PI (PI / 2.0f)
#endif
#ifndef TWO_PI
  #define TWO_PI (PI * 2.0f)
#endif

#undef EPSILON
  #define EPSILON 0.001f			/* Small value */

#undef SMALL_EPSILON
  #define SMALL_EPSILON 0.000001f		/* Very small value */

#undef SMALL_EPSILON_D
  #define SMALL_EPSILON_D 0.000000000001f	/* Very, very small value */

// The smallest Z at which 3D clipping occurs
#define SMALL_Z 0.01f


typedef unsigned int	UINT;

// Auxiliary union TypePointer
// Used for better readability



union TypePointer
{
	UINT*			dw;
	char*			c;
	void*			p;
	float*			f;
	TypePointer() :p(NULL){};
	TypePointer(void* in) :p(in){};
};



#endif//__UTILS_H__