/*
  MODULE : COL (Intersection & Collision Library)
  AUTHOR : Frederic PHILIPPE
           UBI R&D
  FILE : Futil.h (Util macro definition)
*/
 
#ifndef COL_FUTIL_H
#define COL_FUTIL_H
 
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
 
#include "cpa_expt.h"
 
/* For Global declaration in C files : */
#ifdef COL_GLOBALS
 #define COL_EXTERN extern
#else /* !COL_GLOBALS */
 #define COL_EXTERN
#endif /* !COL_GLOBALS */
 
/*
-----------------------------------------------------------------------------
FUNCTIONS DECLARATION:
-----------------------------------------------------------------------------
*/
 
/*
--------------------------------------------------------------------------------
-- Description : Return true if two values (NOZ) have the same sign
--------------------------------------------------------------------------------
-- Creation date : 12 feb 1997               Author : FPI
--------------------------------------------------------------------------------
*/
 
#define FUT_M_bSameSign( A, B ) ( MTH_M_bGreaterEqualZero ( A ) == MTH_M_bGreaterEqualZero ( B ) )
 
/*
--------------------------------------------------------------------------------
-- Description : Return the max value of three values
--------------------------------------------------------------------------------
-- Creation date : 22 aug 1996               Author : FPI
--------------------------------------------------------------------------------
*/
 
#define FUT_M_xMaxValue3( A, B, C ) (\
                                      ( ( (A) > (B) ) && ( (A) > (C) ) ) ?\
                                      (A) :\
                                      ( ( (B) > (C) ) ? (B) : (C) )\
                                    )
 
#define FUT_M_vMaxValue3( V, A, B, C )\
{\
  if ( (A) > (B) )\
  {\
    if ( (A) > (C) )\
    {\
      (V) = (A);\
    }\
    else\
    {\
      (V) = (C);\
    }\
  }\
  else\
  {\
    if ( (B) > (C) )\
    {\
      (V) = (B);\
    }\
    else\
    {\
      (V) = (C);\
    }\
  }\
}
 
/*
--------------------------------------------------------------------------------
-- Description : Return the min value of three values
--------------------------------------------------------------------------------
-- Creation date : 22 aug 1996               Author : FPI
--------------------------------------------------------------------------------
*/
 
#define FUT_M_xMinValue3( A, B, C ) (\
                                      ( ( (A) < (B) ) && ( (A) < (C) ) ) ?\
                                      (A) :\
                                      ( ( (B) < (C) ) ? (B) : (C) )\
                                    )
 
#define FUT_M_vMinValue3( V, A, B, C )\
{\
  if ( (A) < (B) )\
  {\
    if ( (A) < (C) )\
    {\
      (V) = (A);\
    }\
    else\
    {\
      (V) = (C);\
    }\
  }\
  else\
  {\
    if ( (B) < (C) )\
    {\
      (V) = (B);\
    }\
    else\
    {\
      (V) = (C);\
    }\
  }\
}
 
/*
--------------------------------------------------------------------------------
-- Description : Return the delta of a trinome
--------------------------------------------------------------------------------
-- Creation date : 06 feb 1997               Author : FPI
--------------------------------------------------------------------------------
*/
 
#define FUT_M_xTrinomeDelta( A, B, C ) ( MTH_M_xSub ( MTH_M_xSqr ( B ),\
                                                      MTH_M_xMul ( MTH_C_4,\
                                                                   MTH_M_xMul ( A, C )\
                                                                 )\
                                                    )\
                                       )
 
/*
--------------------------------------------------------------------------------
-- Description : Return the interval inclusion for 2 two values
--------------------------------------------------------------------------------
-- Creation date : 22 aug 1996               Author : FPI
--------------------------------------------------------------------------------
*/
 
#define FUT_M_bInRangeE2( A, B, C, D, E, F ) ( ( (A) <= (B) ) &&\
                                               ( (B) <= (C) ) &&\
                                               ( (D) <= (E) ) &&\
                                               ( (E) <= (F) )\
                                             )
 
/*
--------------------------------------------------------------------------------
-- Description : Add a scalar to a vector
--------------------------------------------------------------------------------
-- Creation date : 22 jan 1997               Author : FPI
--------------------------------------------------------------------------------
*/
 
/* MTH3D_M_vAddVector(VectDest, VectA, S)   : VectDest = VectA + S */
#define FUT_M_vAddScaleVector( VectDest, VectA, S )\
{\
  (VectDest)->xX = MTH_M_xAdd ( (VectA)->xX, (S) );\
  (VectDest)->xY = MTH_M_xAdd ( (VectA)->xY, (S) );\
  (VectDest)->xZ = MTH_M_xAdd ( (VectA)->xZ, (S) );\
}
 
/*
--------------------------------------------------------------------------------
-- Description : Sub a scalar to a vector
--------------------------------------------------------------------------------
-- Creation date : 22 jan 1997               Author : FPI
--------------------------------------------------------------------------------
*/
 
/* MTH3D_M_vSubVector(VectDest, VectA, S)   : VectDest = VectA - S */
#define FUT_M_vSubScaleVector( VectDest, VectA, S )\
{\
  (VectDest)->xX = MTH_M_xSub ( (VectA)->xX, (S) );\
  (VectDest)->xY = MTH_M_xSub ( (VectA)->xY, (S) );\
  (VectDest)->xZ = MTH_M_xSub ( (VectA)->xZ, (S) );\
}
 
/*
--------------------------------------------------------------------------------
-- Description : Swap two vector 3D pointers
--------------------------------------------------------------------------------
-- Creation date : 22 aug 1996               Author : FPI
--------------------------------------------------------------------------------
*/
 
#define FUT_M_vSwapVector3DPointer( A, B )\
{\
  MTH3D_tdstVector *p_stT;\
\
  p_stT = *A;\
  *A = *B;\
  *B = p_stT;\
}
 
#ifdef __cplusplus
};
#endif /* __cplusplus */
 
#endif /* COL_FUTIL_H */