| int transformation[(2*19 - 1) * (2*19 - 1)][8]; |
| |
| const int transformation2[8][2][2] = { |
| {{1, 0}, {0, 1}}, |
| {{0, 1}, {-1, 0}}, |
| {{-1, 0}, {0, -1}}, |
| {{0, -1}, {1, 0}}, |
| {{0, -1}, {-1, 0}}, |
| {{-1, 0}, {0, 1}}, |
| {{0, 1}, {1, 0}}, |
| {{1, 0}, {0, -1}} |
| }; |
| |
| void |
| transformation_init (void) |
| { |
| int k; |
| int dx; |
| int dy; |
| |
| for (k = 0; k < 8; k++) |
| { |
| for (dy = -19 + 1; dy <= 19 - 1; dy++) |
| { |
| for (dx = -19 + 1; dx <= 19 - 1; dx++) |
| { |
| int tx; |
| int ty; |
| do |
| { |
| *&tx = |
| transformation2[k][0][0] * (dx) + |
| transformation2[k][0][1] * (dy); |
| *&ty = |
| transformation2[k][1][0] * (dx) + |
| transformation2[k][1][1] * (dy); |
| } |
| while (0); |
| transformation[((dy + 19 - 1) * (2 * 19 - 1) + |
| (dx + 19 - 1))][k] = ((tx) * (19 + 1) + (ty)); |
| } |
| } |
| } |
| } |