-inline bool squares_aligned(Square s1, Square s2, Square s3) {
- return DirectionTable[s1][s2] != DELTA_NONE
- && abs(DirectionTable[s1][s2]) == abs(DirectionTable[s2][s3]);
-}
-
-inline bool direction_is_straight(Square s1, Square s2) {
- return abs(DirectionTable[s1][s2]) == DELTA_N
- || abs(DirectionTable[s1][s2]) == DELTA_E;
-}
-
-////
-//// Prototypes
-////
-
-extern void init_direction_table();
-