#undef ABS
#undef SIGN
#undef MIN
#undef MAX
#undef IN
#undef CLIP
#undef RND
#undef INSIDE

#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
#define IN(v,min,max) (((v)>=(min))&&((v)<=(max)))
#define CLIP(v,min,max)	(((v)>(max))?(max):((v)<(min))?(min):(v))
#define RND(v)	(((v)>0.0)?((int)((v)+0.5)):((int)((v)-0.5)))
#define ABS(v) (((v)<0.0)?(-(v)):(v))
#define SIGN(v) (((v)<0.0)?(-1.0):(1.0))
#define INSIDE( vdim, hdim, v, h ) \
  (((v)>=0) && ((v)<(vdim)) && ((h)>=0) && ((h)<(hdim)))
#define ASSERT( val ) if( !(val) ) \
{ fprintf(stderr,"ASSERTION ERROR %s:%d\n",__FILE__, __LINE__); exit(-1); }