1 files changed, 59 insertions, 0 deletions

diff --git a/old/2020-unknown-date/pieces.h b/old/2020-unknown-date/pieces.h
new file mode 100644
index 0000000..dbdd740
--- /dev/null
+++ b/old/2020-unknown-date/pieces.h
@@ -0,0 +1,59 @@
+/* Moves and other things */
+
+#ifndef PIECES_H
+#define PIECES_H
+
+typedef enum {
+  U, U2, U3, D, D2, D3, R, R2, R3, L, L2, L3, F, F2, F3, B, B2, B3,
+  Uw, Uw2, Uw3, Dw, Dw2, Dw3, Rw, Rw2, Rw3,
+  Lw, Lw2, Lw3, Fw, Fw2, Fw3, Bw, Bw2, Bw3,
+  M, M2, M3, S, S2, S3, E, E2, E3,
+  X, X2, X3, Y, Y2, Y3, Z, Z2, Z3,
+  NULLMOVE
+} Move;
+typedef enum {
+  U_center, D_center, R_center, L_center, F_center, B_center
+} Center;
+typedef enum { UF, UL, UB, UR, DF, DL, DB, DR, FR, FL, BL, BR } Edge;
+typedef enum { UFR, UFL, UBL, UBR, DFR, DFL, DBL, DBR } Corner;
+
+/* Arrays for strings of pieces and moves */
+extern char edge_string[12][5];
+extern char corner_string[8][5];
+extern char center_string[6][5];
+extern char move_string[NULLMOVE+1][5];
+
+/* Three big arrays that determine the movement of edges, corners and
+ * centers for some of the basic moves. Yes, one can be much more elegant and
+ * write much fewer lines. But then things get less elegant somewhere else. */
+extern int edge_cycle[NULLMOVE+1][12];
+extern int corner_cycle[NULLMOVE+1][8];
+extern int center_cycle[NULLMOVE+1][6];
+
+/* Representation of the cube */
+typedef struct {
+  /* Edge orientation */
+  int eofb;
+  int eorl;
+  int eoud;
+  
+  /* Corner orientation */
+  int coud;
+  int cofb;
+  int corl;
+
+  /* Position of M/E/S slice edges */
+  /* TODO: keep in mind that the 4! positions with edges in correct slice
+   * must be the first 4! indeces */
+  int epose;
+  int eposs;
+  int eposm;
+
+  /* Permutation of corners */
+  int cp;
+
+  /* Position of centers */
+  int centerpos;
+} Cube;
+
+#endif