1int transformation[(2*19 - 1) * (2*19 - 1)][8]; 2 3const int transformation2[8][2][2] = { 4 {{1, 0}, {0, 1}}, 5 {{0, 1}, {-1, 0}}, 6 {{-1, 0}, {0, -1}}, 7 {{0, -1}, {1, 0}}, 8 {{0, -1}, {-1, 0}}, 9 {{-1, 0}, {0, 1}}, 10 {{0, 1}, {1, 0}}, 11 {{1, 0}, {0, -1}} 12}; 13 14void 15transformation_init (void) 16{ 17 int k; 18 int dx; 19 int dy; 20 21 for (k = 0; k < 8; k++) 22 { 23 for (dy = -19 + 1; dy <= 19 - 1; dy++) 24 { 25 for (dx = -19 + 1; dx <= 19 - 1; dx++) 26 { 27 int tx; 28 int ty; 29 do 30 { 31 *&tx = 32 transformation2[k][0][0] * (dx) + 33 transformation2[k][0][1] * (dy); 34 *&ty = 35 transformation2[k][1][0] * (dx) + 36 transformation2[k][1][1] * (dy); 37 } 38 while (0); 39 transformation[((dy + 19 - 1) * (2 * 19 - 1) + 40 (dx + 19 - 1))][k] = ((tx) * (19 + 1) + (ty)); 41 } 42 } 43 } 44} 45