vectori.h

#ifndef __VECTORI_H__
#define __VECTORI_H__
/*=============================================================================   
     Module  : vectori.h
     Purpose : Define some simple INTEGER vector operations.
     Author  : Doug Ehlenberger, CNIC Mt. Sinai School of Medicine
               
==============================================================================*/


/*-----------------------------------------------------------------------------
   Vector2i
-----------------------------------------------------------------------------*/

typedef struct tagVector2i
   {
   int x;
   int y;
   }
   Vector2i;


#define ZeroVector2i( V ) \
   {                      \
   ( V ).x = 0;           \
   ( V ).y = 0;           \
   }


#define IsZeroVector2i( V ) \
   (                        \
   0 == ( V ).x  &&         \
   0 == ( V ).y             \
   )


#define SetVector2i( V, X, Y ) \
   {                           \
   ( V ).x = ( X );            \
   ( V ).y = ( Y );            \
   }


#define AddVector2i( A, B, C )  \
   {                            \
   ( C ).x = ( A ).x + ( B ).x; \
   ( C ).y = ( A ).y + ( B ).y; \
   }


#define SubVector2i( A, B, C )  \
   {                            \
   ( C ).x = ( A ).x - ( B ).x; \
   ( C ).y = ( A ).y - ( B ).y; \
   }


#define ReverseVector2i( A, C ) \
   {                            \
   ( C ).x = -( A ).x;          \
   ( C ).y = -( A ).y;          \
   }


#define DotProduct2i( A, B )\
   ( ( A ).x*( B ).x + ( A ).y*( B ).y )


/*-----------------------------------------------------------------------------
   Vector3i
-----------------------------------------------------------------------------*/

typedef struct tagVector3i  
   {
   int x;
   int y;
   int z;
   }
   Vector3i;


#define ZeroVector3i( V ) \
   {                      \
   ( V ).x = 0;           \
   ( V ).y = 0;           \
   ( V ).z = 0;           \
   }


#define IsZeroVector3i( V ) \
   (                        \
   0 == ( V ).x  &&         \
   0 == ( V ).y  &&         \
   0 == ( V ).z             \
   )


#define SetVector3i( V, X, Y, Z ) \
   {                              \
   ( V ).x = ( X );               \
   ( V ).y = ( Y );               \
   ( V ).z = ( Z );               \
   }


#define AddVector3i( A, B, C )  \
   {                            \
   ( C ).x = ( A ).x + ( B ).x; \
   ( C ).y = ( A ).y + ( B ).y; \
   ( C ).z = ( A ).z + ( B ).z; \
   }


#define SubVector3i( A, B, C )  \
   {                            \
   ( C ).x = ( A ).x - ( B ).x; \
   ( C ).y = ( A ).y - ( B ).y; \
   ( C ).z = ( A ).z - ( B ).z; \
   }


#define ReverseVector3i( A, C ) \
   {                            \
   ( C ).x = -( A ).x;          \
   ( C ).y = -( A ).y;          \
   ( C ).z = -( A ).z;          \
   }


#endif/* __VECTORI_H__ */

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