X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;f=src%2Ftools.c;h=62965af09d2df0e90ce0f15107f6e4c2d9453fe6;hb=e2f44b4cef0a3a0441a8c031181a543751ef9cb3;hp=88c813441050f05ac9595b2a56261e3d586b1866;hpb=ba702cd338586991ab20176cf5587afbb4d77af7;p=rocksndiamonds.git

diff --git a/src/tools.c b/src/tools.c
index 88c81344..62965af0 100644
--- a/src/tools.c
+++ b/src/tools.c
@@ -5578,6 +5578,115 @@ int font2baseimg(int font_nr)
   return font_info[font_nr].special_graphic[GFX_SPECIAL_ARG_DEFAULT];
 }
 
+int getBeltNrFromBeltElement(int element)
+{
+  return (element < EL_CONVEYOR_BELT_2_LEFT ? 0 :
+	  element < EL_CONVEYOR_BELT_3_LEFT ? 1 :
+	  element < EL_CONVEYOR_BELT_4_LEFT ? 2 : 3);
+}
+
+int getBeltNrFromBeltActiveElement(int element)
+{
+  return (element < EL_CONVEYOR_BELT_2_LEFT_ACTIVE ? 0 :
+	  element < EL_CONVEYOR_BELT_3_LEFT_ACTIVE ? 1 :
+	  element < EL_CONVEYOR_BELT_4_LEFT_ACTIVE ? 2 : 3);
+}
+
+int getBeltNrFromBeltSwitchElement(int element)
+{
+  return (element < EL_CONVEYOR_BELT_2_SWITCH_LEFT ? 0 :
+	  element < EL_CONVEYOR_BELT_3_SWITCH_LEFT ? 1 :
+	  element < EL_CONVEYOR_BELT_4_SWITCH_LEFT ? 2 : 3);
+}
+
+int getBeltDirNrFromBeltElement(int element)
+{
+  static int belt_base_element[4] =
+  {
+    EL_CONVEYOR_BELT_1_LEFT,
+    EL_CONVEYOR_BELT_2_LEFT,
+    EL_CONVEYOR_BELT_3_LEFT,
+    EL_CONVEYOR_BELT_4_LEFT
+  };
+
+  int belt_nr = getBeltNrFromBeltElement(element);
+  int belt_dir_nr = element - belt_base_element[belt_nr];
+
+  return (belt_dir_nr % 3);
+}
+
+int getBeltDirNrFromBeltSwitchElement(int element)
+{
+  static int belt_base_element[4] =
+  {
+    EL_CONVEYOR_BELT_1_SWITCH_LEFT,
+    EL_CONVEYOR_BELT_2_SWITCH_LEFT,
+    EL_CONVEYOR_BELT_3_SWITCH_LEFT,
+    EL_CONVEYOR_BELT_4_SWITCH_LEFT
+  };
+
+  int belt_nr = getBeltNrFromBeltSwitchElement(element);
+  int belt_dir_nr = element - belt_base_element[belt_nr];
+
+  return (belt_dir_nr % 3);
+}
+
+int getBeltDirFromBeltElement(int element)
+{
+  static int belt_move_dir[3] =
+  {
+    MV_LEFT,
+    MV_NONE,
+    MV_RIGHT
+  };
+
+  int belt_dir_nr = getBeltDirNrFromBeltElement(element);
+
+  return belt_move_dir[belt_dir_nr];
+}
+
+int getBeltDirFromBeltSwitchElement(int element)
+{
+  static int belt_move_dir[3] =
+  {
+    MV_LEFT,
+    MV_NONE,
+    MV_RIGHT
+  };
+
+  int belt_dir_nr = getBeltDirNrFromBeltSwitchElement(element);
+
+  return belt_move_dir[belt_dir_nr];
+}
+
+int getBeltElementFromBeltNrAndBeltDir(int belt_nr, int belt_dir)
+{
+  static int belt_base_element[4] =
+  {
+    EL_CONVEYOR_BELT_1_LEFT,
+    EL_CONVEYOR_BELT_2_LEFT,
+    EL_CONVEYOR_BELT_3_LEFT,
+    EL_CONVEYOR_BELT_4_LEFT
+  };
+  int belt_dir_nr = (belt_dir == MV_LEFT ? 0 : belt_dir == MV_RIGHT ? 2 : 1);
+
+  return belt_base_element[belt_nr] + belt_dir_nr;
+}
+
+int getBeltSwitchElementFromBeltNrAndBeltDir(int belt_nr, int belt_dir)
+{
+  static int belt_base_element[4] =
+  {
+    EL_CONVEYOR_BELT_1_SWITCH_LEFT,
+    EL_CONVEYOR_BELT_2_SWITCH_LEFT,
+    EL_CONVEYOR_BELT_3_SWITCH_LEFT,
+    EL_CONVEYOR_BELT_4_SWITCH_LEFT
+  };
+  int belt_dir_nr = (belt_dir == MV_LEFT ? 0 : belt_dir == MV_RIGHT ? 2 : 1);
+
+  return belt_base_element[belt_nr] + belt_dir_nr;
+}
+
 int getNumActivePlayers_EM()
 {
   int num_players = 0;