-void init_direction_table() {
- SquareDelta deltas[8] = {
- DELTA_E, DELTA_W, DELTA_N, DELTA_S, DELTA_NE, DELTA_SW, DELTA_NW, DELTA_SE
- };
- for(Square s1 = SQ_A1; s1 <= SQ_H8; s1++)
- for(Square s2 = SQ_A1; s2 <= SQ_H8; s2++) {
- DirectionTable[s1][s2] = uint8_t(DIR_NONE);
- SignedDirectionTable[s1][s2] = uint8_t(SIGNED_DIR_NONE);
- if(s1 == s2) continue;
- for(SignedDirection d = SIGNED_DIR_E; d <= SIGNED_DIR_SE; d++) {
- SquareDelta delta = deltas[d];
- Square s3, s4;
- for(s4 = s1 + delta, s3 = s1;
- square_distance(s4, s3) == 1 && s4 != s2 && square_is_ok(s4);
- s3 = s4, s4 += delta);
- if(s4 == s2 && square_distance(s4, s3) == 1) {
- SignedDirectionTable[s1][s2] = uint8_t(d);
- DirectionTable[s1][s2] = uint8_t(d/2);
- break;
- }
+ for (int idx = 0; idx < 8; idx++)
+ {
+ from = orig;
+ to = from + directions[idx];
+
+ while (to != dest && square_distance(to, from) == 1 && square_is_ok(to))
+ {
+ from = to;
+ to += directions[idx];