rnd-20060407-1-src

[rocksndiamonds.git] / src / game_em / convert.c

diff --git a/src/game_em/convert.c b/src/game_em/convert.c
index f53bd21d43d28d8e4e68b049760ad67d50c404a9..8a44053cabfa187cfe24cff148c6729a8b160d69 100644 (file)
--- a/src/game_em/convert.c
+++ b/src/game_em/convert.c
@@ -8,11 +8,11 @@
  * inconsequential, but no doubt it will break some caves.
  */
 
-#include "global.h"
-#include "tile.h"
-#include "level.h"
+#include "main_em.h"
 
 
+#define ALLOW_ROLLING_SPRING
+
 static unsigned char remap_v6[256] =
 {
   /* filter crap for v6 */
@@ -22,7 +22,11 @@ static unsigned char remap_v6[256] =
   0,16,2,18,       36,37,37,37,     40,41,42,43,     44,45,128,128,
   128,148,148,     148,45,45,45,    148,0,57,58,     59,60,61,62,63,
 
+#ifdef ALLOW_ROLLING_SPRING
+  64,65,66,67,     68,69,69,71,     72,73,74,75,     118,75,75,75,
+#else
   64,65,66,67,     68,69,69,69,     69,73,74,75,     118,75,75,75,
+#endif
   75,75,75,75,     75,153,153,153,  153,153,153,153, 153,153,153,153,
   153,153,153,99,  100,68,68,68,    68,68,68,68,     68,118,118,118,
   118,118,114,115, 131,118,118,119, 120,121,122,118, 118,118,118,118,
@@ -181,6 +185,7 @@ int cleanup_em_level(unsigned char *src, int length)
 
     for (i = 0; i < 2106; i++)
       src[i] = (src[i] ^ (j += 7)) - 0x11;
+    src[0] = 131;              /* needed for Emerald Mine II levels */
     src[1] = 131;
     for (i = 0; i < 2048; i++)
       src[i] = remap_v4[src[i]];
@@ -199,7 +204,7 @@ int cleanup_em_level(unsigned char *src, int length)
   {
     /* ---------- this cave has unknown file format ---------- */
 
-#if 1
+#if 0
     printf("::: %d, %d\n", src[0], src[1983]);
 #endif
 
@@ -441,6 +446,11 @@ int cleanup_em_level(unsigned char *src, int length)
  * - rolling spring is now turned into regular spring. it appears the emc
  *   editor only uses the force code for initially moving spring. i will
  *   follow this in my editor.
+ *
+ * 2006-04-02
+ * - introduced ALLOW_ROLLING_SPRING; if defined, do NOT turn rolling spring
+ *   into regular spring, because this breaks at least E.M.C. Mine 3, level 79
+ *   (see comment directly above)
  */
 
 static unsigned short remap_emerald[256] =
@@ -465,10 +475,17 @@ static unsigned short remap_emerald[256] =
   Xstone,              Xgrow_ew,       Xgrow_ns,       Xdynamite_1,
   Xdynamite_2,         Xdynamite_3,    Xdynamite_4,    Xacid_s,
 
+#ifdef ALLOW_ROLLING_SPRING
+  Xexit_1,             Xexit_2,        Xexit_3,        Xballoon,
+  Xplant,              Xspring,        Xspring_fall,   Xspring_w,
+  Xspring_e,           Xball_1,        Xball_2,        Xandroid,
+  Xblank,              Xandroid,       Xandroid,       Xandroid,
+#else
   Xexit_1,             Xexit_2,        Xexit_3,        Xballoon,
   Xplant,              Xspring,        Xspring,        Xspring,
   Xspring,             Xball_1,        Xball_2,        Xandroid,
   Xblank,              Xandroid,       Xandroid,       Xandroid,
+#endif
 
   Xandroid,            Xandroid,       Xandroid,       Xandroid,
   Xandroid,            Xblank,         Xblank,         Xblank,
@@ -547,6 +564,20 @@ static unsigned short remap_emerald[256] =
 #endif
 };
 
+static int get_em_element(unsigned short em_element_raw, int file_version)
+{
+  int em_element = remap_emerald[em_element_raw];
+
+  if (file_version <= FILE_VERSION_EM_V4)
+  {
+    /* versions up to V4 had no grass, but only sand/dirt */
+    if (em_element == Xgrass)
+      em_element = Xdirt;
+  }
+
+  return em_element;
+}
+
 void convert_em_level(unsigned char *src, int file_version)
 {
   static int eater_offset[8] =
@@ -616,9 +647,10 @@ void convert_em_level(unsigned char *src, int file_version)
 
   for (i = 0; i < 8; i++)
     for (x = 0; x < 9; x++)
-      lev.eater_array[i][x] = remap_emerald[src[eater_offset[i] + x]];
+      lev.eater_array[i][x] =
+       get_em_element(src[eater_offset[i] + x], file_version);
 
-  temp = remap_emerald[src[0x86F]];
+  temp = get_em_element(src[0x86F], file_version);
   for (y = 0; y < 8; y++)
   {
     if (src[0x872] & 1)
@@ -888,7 +920,8 @@ void convert_em_level(unsigned char *src, int file_version)
   temp = 0;
   for (y = 0; y < lev.height; y++)
     for (x = 0; x < lev.width; x++)
-      native_em_level.cave[x + 1][y + 1] = remap_emerald[src[temp++]];
+      native_em_level.cave[x + 1][y + 1] =
+       get_em_element(src[temp++], file_version);
 
   /* at last, set the two players at their positions in the playfield */
   /* (native EM[C] levels always have exactly two players in a level) */
@@ -975,7 +1008,7 @@ void prepare_em_level(void)
     }
   }
 
-  num_tape_players = getActivePlayers_EM();
+  num_tape_players = getNumActivePlayers_EM();
 
   if (num_tape_players != -1)
     lev.home_initial = MIN(lev.home_initial, num_tape_players);