X-Git-Url: https://plomlompom.com/repos/foo.html?a=blobdiff_plain;f=src%2Fyx_uint16.c;h=0d607cb9da63eca1aace7ffaaa9c762d7028478d;hb=f07cfd3448cb75abc1ae6fbfc9a946b8c4b91f5d;hp=afcab4db7a17d064a1faa36890576845bbd572b3;hpb=1f4244b457c7df5b5981e4c0efcf93a8b6386360;p=plomrogue

diff --git a/src/yx_uint16.c b/src/yx_uint16.c
index afcab4d..0d607cb 100644
--- a/src/yx_uint16.c
+++ b/src/yx_uint16.c
@@ -6,3 +6,11 @@ extern char yx_uint16_cmp (struct yx_uint16 a, struct yx_uint16 b) {
   if (a.y == b.y && a.x == b.x) return 1;
   else                          return 0; }
 
+extern struct yx_uint16 mv_yx_in_dir (char d, struct yx_uint16 yx) {
+// Return yx coordinates one step to the direction d of yx.
+  if      (d == NORTH) yx.y--;
+  else if (d == EAST)  yx.x++;
+  else if (d == SOUTH) yx.y++;
+  else if (d == WEST)  yx.x--;
+  return yx; }
+