1 files changed, 45 insertions, 0 deletions

diff --git a/old/2021-02-18-piecefilter/src/cube.h b/old/2021-02-18-piecefilter/src/cube.h
new file mode 100644
index 0000000..9b64a0c
--- /dev/null
+++ b/old/2021-02-18-piecefilter/src/cube.h
@@ -0,0 +1,45 @@
+#ifndef CUBE_H
+#define CUBE_H
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include "utils.h"
+
+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;
+
+typedef struct {
+  bool epose, eposs, eposm, eofb, eorl, eoud, cp, coud, cofb, corl, cpos;
+} PieceFilter;
+
+typedef struct {
+  uint16_t eofb, eorl, eoud, coud, cofb, corl,
+           epose, eposs, eposm, cp, cpos;
+} Cube;
+
+typedef struct {
+  int ep[12], eofb[12], eorl[12], eoud[12],
+      cp[8],  coud[8],  corl[8],  cofb[8],  cpos[6];
+} CubeArray;
+
+
+extern PieceFilter fAll;
+
+Cube blank_cube();
+/* Return axis (ud=0, rl=1, fb=0) of center c */
+int center_axis(int c);
+/* Return slice (e=0, s=1, m=2) to which e belongs */
+int edge_slice(int e);
+void cube_to_arrays(Cube cube, CubeArray *arr, PieceFilter f);
+Cube arrays_to_cube(CubeArray arr, PieceFilter f);
+bool equal(Cube c1, Cube c2);
+bool is_solvable(Cube cube);
+bool is_solved(Cube cube);
+void print_cube(Cube cube);
+Cube inverse_cube(Cube cube);
+/* Use c2 as an alg on c1 */
+Cube compose_via_arrays(CubeArray c2, Cube c1, PieceFilter f);
+
+#endif