[WIP] XRacer - a racing gamexracer

Plan:
-----

A simple racing game like Pole Position or Enduro.

Status:
-------
 - Currently generates a random road and scrolls through it
 - Random road generation (curves and hills)
 - Supports loading of maps from a file ("/output.xrm")
 - Sample map at http://a.pomf.se/ynhlwq.xrm

Todo:
-----
 - Convert to fixed-point math in all places (only one place left!)
 - Improve/fix track looping
 - Improve random road generation to start and end at the same height
 - Finish sprite code
 - Make sprites
 - Game-ify!

What's new:
-----------
 - NEW: uses greylib on low-depth targets!
 - Loadable maps implemented, UNTESTED!
 - Sprites in progress (see render() in graphics.c)

Change-Id: Ia2ff60b3c43d9f2e3a4f63e0ad90d2cb571c605e

1 files changed, 47 insertions, 0 deletions

diff --git a/apps/plugins/xracer/map.h b/apps/plugins/xracer/map.h
new file mode 100644
index 0000000..1681b12
--- /dev/null
+++ b/apps/plugins/xracer/map.h
@@ -0,0 +1,47 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2015 Franklin Wei
+ *
+ * This program 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 (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#ifndef _MAP_H_
+#define _MAP_H_
+
+#include <stdint.h>
+
+#define MAP_VERSION 0x0001
+
+struct road_segment;
+
+struct road_section {
+    unsigned char type;
+    uint32_t len;
+    int32_t  slope;
+
+    /* FP, 8 fracbits */
+    long     curve;
+};
+
+/* takes a map in internal format and converts it to road_segment's */
+
+unsigned int load_map(struct road_segment*, unsigned max_road_length, struct road_section*, unsigned map_len);
+
+/* loads a map in interchange format from a file */
+unsigned load_external_map(struct road_segment*, unsigned int max_road_length, const char*);
+
+#endif