/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
- * Ken Stevens, Steve McClure
+ * Copyright (C) 1986-2021, Dave Pare, Jeff Bailey, Thomas Ruschak,
+ * Ken Stevens, Steve McClure, Markus Armbruster
*
- * This program is free software; you can redistribute it and/or modify
+ * Empire is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* ---
*
- * See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
- * related information and legal notices. It is expected that any future
- * projects/authors will amend these files as needed.
+ * See files README, COPYING and CREDITS in the root of the source
+ * tree for related information and legal notices. It is expected
+ * that future projects/authors will amend these files as needed.
*
* ---
*
* xy.h: Constants having to do with world locations.
- *
+ *
* Known contributors to this file:
* Steve McClure, 1998
*/
-#ifndef _XY_H_
-#define _XY_H_
+#ifndef XY_H
+#define XY_H
+
+#include "types.h"
-#include "sect.h"
-#include "nat.h"
+/* Return the number of sectors in the world */
+#define WORLD_SZ() (WORLD_X * WORLD_Y / 2)
-/* Used to calculate an offset into an array. Used for
- dynamically sizing the world. */
-#define XYOFFSET(x, y) ((y * WORLD_X) + x)
+/* Fast version of sctoff() for normalized arguments */
+#define XYOFFSET(x, y) (((y) * WORLD_X + (x)) / 2)
-#define XNORM(x) (((x)<0) ? ((WORLD_X-(-(x)%WORLD_X))%WORLD_X) : ((x)%WORLD_X))
-#define YNORM(y) (((y)<0) ? ((WORLD_Y-(-(y)%WORLD_Y))%WORLD_Y) : ((y)%WORLD_Y))
+#define XNORM(x) \
+ (((x) < 0) ? (WORLD_X - 1 - ((-(x) - 1) % WORLD_X)) : ((x) % WORLD_X))
+#define YNORM(y) \
+ (((y) < 0) ? (WORLD_Y - 1 - ((-(y) - 1) % WORLD_Y)) : ((y) % WORLD_Y))
struct range {
- coord lx; /* low-range x,y */
- coord ly;
- coord hx; /* high-range x,y */
- coord hy;
- int width; /* range width, height */
- int height;
+ coord lx, ly; /* low-range x,y (inclusive) */
+ coord hx, hy; /* high-range x,y (inclusive) */
+ int width, height;
};
-extern s_char *xyfmt();
-extern s_char *xyas(coord x, coord y, natid country);
-extern s_char *ownxy(struct sctstr *sp);
-extern coord xrel(struct natstr *np, coord absx);
-extern coord yrel(struct natstr *np, coord absy);
-extern void xyrelrange(struct natstr *np, struct range *src,struct range *dst);
-extern void xyabsrange(struct natstr *np, struct range *src,struct range *dst);
-extern void inputxy(coord *xp, coord *yp, natid cn);
+extern char *xyas(coord x, coord y, natid country);
+extern char *ownxy(struct sctstr *sp);
+extern coord xrel(struct natstr *np, coord absx);
+extern coord yrel(struct natstr *np, coord absy);
+extern void xyrelrange(struct natstr *, struct range *, struct range *);
+extern void xyabsrange(struct natstr *, struct range *, struct range *);
+extern void xydist_range(coord, coord, int, struct range *);
+extern void xysize_range(struct range *);
+extern coord strtox(char *str, char **end);
+extern coord strtoy(char *str, char **end);
extern coord xabs(struct natstr *np, coord relx);
extern coord yabs(struct natstr *np, coord rely);
-extern coord xnorm(register coord x);
-extern coord ynorm(register coord y);
+extern int sctoff(coord x, coord y);
+extern void sctoff2xy(coord *, coord *, int);
+extern coord xnorm(coord x);
+extern coord ynorm(coord y);
extern int xyinrange(coord x, coord y, struct range *rp);
-#endif /* _XY_H_ */
-
+#endif