diff options
Diffstat (limited to 'src/map/map.c')
| -rw-r--r-- | src/map/map.c | 46 |
1 files changed, 0 insertions, 46 deletions
diff --git a/src/map/map.c b/src/map/map.c index c4a0847b6..59eef42cc 100644 --- a/src/map/map.c +++ b/src/map/map.c @@ -177,52 +177,6 @@ int map_getusers(void) return map_users; } -//Distance functions, taken from http://www.flipcode.com/articles/article_fastdistance.shtml -int check_distance(int dx, int dy, int distance) -{ -#ifdef CIRCULAR_AREA - //In this case, we just do a square comparison. Add 1 tile grace for diagonal range checks. - return (dx*dx + dy*dy <= distance*distance + (dx&&dy?1:0)); -#else - if (dx < 0) dx = -dx; - if (dy < 0) dy = -dy; - return ((dx<dy?dy:dx) <= distance); -#endif -} - -unsigned int distance(int dx, int dy) -{ -#ifdef CIRCULAR_AREA - unsigned int min, max; - - if ( dx < 0 ) dx = -dx; - if ( dy < 0 ) dy = -dy; - //There appears to be something wrong with the aproximation below when either dx/dy is 0! [Skotlex] - if ( dx == 0 ) return dy; - if ( dy == 0 ) return dx; - - if ( dx < dy ) - { - min = dx; - max = dy; - } else { - min = dy; - max = dx; - } - // coefficients equivalent to ( 123/128 * max ) and ( 51/128 * min ) - return ((( max << 8 ) + ( max << 3 ) - ( max << 4 ) - ( max << 1 ) + - ( min << 7 ) - ( min << 5 ) + ( min << 3 ) - ( min << 1 )) >> 8 ); -#else - if (dx < 0) dx = -dx; - if (dy < 0) dy = -dy; - return (dx<dy?dy:dx); -#endif -} - -// -// block削除の安全性確保?理 -// - /*========================================== * blockをfreeするときfreeの?わりに呼ぶ * ロックされているときはバッファにためる |