implemented global warming (glacier belts with age > 200 can melt)

src/common/gamecode/randenc.c

@@ -909,8 +909,7 @@ melt_iceberg(region *r)
 	for (u=r->units; u; u=u->next) freset(u->faction, FL_DH);
 	for (u=r->units; u; u=u->next) if (!fval(u->faction, FL_DH)) {
 		fset(u->faction, FL_DH);
-		ADDMSG(&u->faction->msgs, new_message(u->faction,
+		ADDMSG(&u->faction->msgs, msg_message("iceberg_melt", "region", r));
-			"iceberg_melt%r:region", r));
 	}
 
 	/* driftrichtung löschen */
@@ -1049,13 +1048,18 @@ move_icebergs(void)
 {
 	region *r;
 
-	for (r=regions; r; r=r->next) if (rterrain(r) == T_ICEBERG && !fval(r, RF_DH)) {
+  for (r=regions; r; r=r->next) {
-		if (rand()%100 < 60) {
+    if (rterrain(r) == T_ICEBERG && !fval(r, RF_DH)) {
-			fset(r, RF_DH);
+      int select = rand() % 10;
-			move_iceberg(r);
+      if (select < 4) {
-		} else if (rand()%100 < 10){
+        /* 4% chance */
   			fset(r, RF_DH);
 	  		melt_iceberg(r);
+      } else if (select<64) {
+        /* 60% chance */
+        fset(r, RF_DH);
+        move_iceberg(r);
+      }
 		}
 	}
 }
@@ -1065,7 +1069,8 @@ create_icebergs(void)
 {
 	region *r;
 
-	for (r=regions; r; r=r->next) if (rterrain(r) == T_ICEBERG_SLEEP && rand()%100 < 5) {
+  for (r=regions; r; r=r->next) {
+    if (rterrain(r) == T_ICEBERG_SLEEP && chance(0.05)) {
       boolean has_ocean_neighbour = false;
       direction_t dir;
       region *rc;
@@ -1086,12 +1091,17 @@ create_icebergs(void)
       fset(r, RF_DH);
       move_iceberg(r);
 
-		for (u=r->units; u; u=u->next) freset(u->faction, FL_DH);
+      for (u=r->units; u; u=u->next) {
-		for (u=r->units; u; u=u->next) if (!fval(u->faction, FL_DH)) {
+        freset(u->faction, FL_DH);
+      }
+      for (u=r->units; u; u=u->next) {
+        if (!fval(u->faction, FL_DH)) {
           fset(u->faction, FL_DH);
           ADDMSG(&u->faction->msgs, msg_message("iceberg_create", "region", r));
         }
       }
+    }
+	}
 }
 
 static void

src/eressea/korrektur.c

@@ -24,8 +24,9 @@
 /* misc includes */
 #include <attributes/key.h>
 #include <attributes/otherfaction.h>
-#include <modules/xecmd.h>
+#include <attributes/targetregion.h>
 #include <modules/autoseed.h>
+#include <modules/xecmd.h>
 
 /* gamecode includes */
 #include <gamecode/economy.h>
@@ -57,16 +58,17 @@
 #include <kernel/unit.h>
 
 /* util includes */
-#include <attrib.h>
+#include <util/attrib.h>
-#include <language.h>
+#include <util/base36.h>
-#include <base36.h>
+#include <util/cvector.h>
-#include <log.h>
-#include <cvector.h>
 #include <util/event.h>
-#include <goodies.h>
+#include <util/goodies.h>
-#include <resolve.h>
+#include <util/language.h>
-#include <sql.h>
+#include <util/log.h>
-#include <vset.h>
+#include <util/rand.h>
+#include <util/resolve.h>
+#include <util/sql.h>
+#include <util/vset.h>
 
 /* libc includes */
 #include <stdio.h>
@@ -74,10 +76,6 @@
 #include <stdlib.h>
 #include <string.h>
 
-/* attributes includes */
-#include <attributes/targetregion.h>
-#include <attributes/key.h>
-
 #undef XMAS1999
 #undef XMAS2000
 #undef XMAS2001
@@ -749,7 +747,7 @@ fix_gates(void)
 static void
 frame_regions(void)
 {
-  unsigned short ocean_age = turn;
+  unsigned short ocean_age = (unsigned short)turn;
   region * r = regions;
   for (r=regions;r;r=r->next) {
     direction_t d;
@@ -785,6 +783,46 @@ frame_regions(void)
   }
 }
 
+#define GLOBAL_WARMING 200
+
+#ifdef GLOBAL_WARMING
+static void
+global_warming(void)
+{
+  region * r;
+  for (r=regions;r;r=r->next) {
+    if (r->age<GLOBAL_WARMING) continue;
+    if (r->terrain==T_GLACIER) {
+      /* 1% chance that an existing glacier gets unstable */
+      if (chance(0.01)) {
+        direction_t d;
+        for (d=0;d!=MAXDIRECTIONS;++d) {
+          region * rn = rconnect(r, d);
+          if (rn!=NULL) {
+            terrain_t rt = rn->terrain;
+            if (rt!=T_ICEBERG && rt!=T_ICEBERG_SLEEP && rt!=T_GLACIER && rt!=T_OCEAN) {
+              break;
+            }
+          }
+        }
+        if (d==MAXDIRECTIONS) {
+          terraform(r, T_ICEBERG_SLEEP);
+        }
+      }
+    } else if (r->terrain==T_ICEBERG || r->terrain==T_ICEBERG_SLEEP) {
+      direction_t d;
+      for (d=0;d!=MAXDIRECTIONS;++d) {
+        region * rn = rconnect(r, d);
+        if (rn && rn->terrain==T_GLACIER && chance(0.10)) {
+          /* 10% chance that a glacier next to an iceberg gets unstable */
+          terraform(rn, T_ICEBERG_SLEEP);
+        }
+      }
+    }
+  }
+}
+#endif
+
 static int
 fix_astralplane(void)
 {
@@ -1131,6 +1169,9 @@ korrektur(void)
   do_once("atrx", fix_attribflags());
   do_once("asfi", fix_astral_firewalls());
   frame_regions();
+#ifdef GLOBAL_WARMING
+  global_warming();
+#endif
 	fix_astralplane();
 	fix_firewalls();
 	fix_gates();