From 0e8d73bb3edcc8bdff6e3ded442b66f68265059a Mon Sep 17 00:00:00 2001
From: Sebastiano Tronto <sebastiano.tronto@gmail.com>
Date: Sun, 21 Jun 2020 23:01:57 +0200
Subject: First push

---
 src/coordinates.h | 92 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 src/coordinates.h

(limited to 'src/coordinates.h')

diff --git a/src/coordinates.h b/src/coordinates.h
new file mode 100644
index 0000000..10f7d18
--- /dev/null
+++ b/src/coordinates.h
@@ -0,0 +1,92 @@
+/* General rule for piece numbering (visually nicer):
+ *
+ *   0   1   2   3   4   5   6   7   8   9  10  11
+ *  UF  UL  UB  UR  DF  DL  DB  DR  FR  FL  BL  BR
+ * UFR UFL UBL UBR DFR DFL DBL DBR
+ *                                                   
+ * The order of moves is
+ *  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18
+ *  -  U U2 U'  D D2 D'  R R2 R'  L L2 L'  F F2 F'  B B2 B'
+ *  (0 is reserved for no move)                              */
+
+#define UF 0
+#define UL 1
+#define UB 2
+#define UR 3
+#define DF 4
+#define DL 5
+#define DB 6
+#define DR 7
+#define FR 8
+#define FL 9
+#define BL 10
+#define BR 11
+
+#define UFR 0
+#define UFL 1
+#define UBL 2
+#define UBR 3
+#define DFR 4
+#define DFL 5
+#define DBL 6
+#define DBR 7
+
+#define U  1
+#define U2 2
+#define U3 3
+#define D  4
+#define D2 5
+#define D3 6
+#define R  7
+#define R2 8
+#define R3 9
+#define L  10
+#define L2 11
+#define L3 12
+#define F  13
+#define F2 14
+#define F3 15
+#define B  16
+#define B2 17
+#define B3 18
+
+extern char edge_string_list[12][5];
+extern char corner_string_list[8][5];
+extern char move_string_list[19][5];
+extern int inverse_move[19];
+
+/* Convert piece representation from integer to array.
+ * Come convertions are not "perfect": for example, and epud type of piece
+ * is represented by a permutation index in 8! elements, but it as an array
+ * it is converted to the first 8 elements of a 12 elements ep array (with
+ * meaningless values for the other 4 elements). */
+
+void ep_int_to_array(int ep, int a[12]);
+void epud_int_to_array(int epud, int a[12]);
+void epfb_int_to_array(int epfb, int a[12]);
+void eprl_int_to_array(int eprl, int a[12]);
+void epose_int_to_array(int epos, int a[12]);
+void eposs_int_to_array(int epos, int a[12]);
+void eposm_int_to_array(int epos, int a[12]);
+void epe_int_to_array(int epe, int a[12]);
+void epm_int_to_array(int epe, int a[12]);
+void eps_int_to_array(int epe, int a[12]);
+void emslices_int_to_array(int emslices, int a[12]);
+void cp_int_to_array(int cp, int a[8]);
+void eo_11bits_to_array(int eo, int a[12]);
+void co_7trits_to_array(int co, int a[8]);
+
+int ep_array_to_int(int ep[12]);
+int epud_array_to_int(int ep[12]);
+int epfb_array_to_int(int ep[12]);
+int eprl_array_to_int(int ep[12]);
+int epose_array_to_int(int ep[12]);
+int eposs_array_to_int(int ep[12]);
+int eposm_array_to_int(int ep[12]);
+int epe_array_to_int(int epe[12]);
+int epm_array_to_int(int epe[12]);
+int eps_array_to_int(int epe[12]);
+int emslices_array_to_int(int ep[12]);
+int cp_array_to_int(int cp[8]);
+int eo_array_to_11bits(int a[12]);
+int co_array_to_7trits(int a[8]);
-- 
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