#if DM_VERSION < 513

#define ismovable(A) (istype(A, /atom/movable))

#define islist(L) (istype(L, /list))

#define CLAMP01(x) (CLAMP(x, 0, 1))

#define CLAMP(CLVALUE,CLMIN,CLMAX) ( max( (CLMIN), min((CLVALUE), (CLMAX)) ) )

#define ATAN2(x, y) ( !(x) && !(y) ? 0 : (y) >= 0 ? arccos((x) / sqrt((x)*(x) + (y)*(y))) : -arccos((x) / sqrt((x)*(x) + (y)*(y))) )

#define TAN(x) (sin(x) / cos(x))

#define arctan(x) (arcsin(x/sqrt(1+x*x)))

#define between(x, y, z) max(min(y, z), x)

//////////////////////////////////////////////////

#else

#define CLAMP01(x) clamp(x, 0, 1)

#define CLAMP(CLVALUE, CLMIN, CLMAX) clamp(CLVALUE, CLMIN, CLMAX)

#define TAN(x) tan(x)

#define ATAN2(x, y) arctan(x, y)

#define between(x, y, z) clamp(y, x, z)

#endif