From 2b6f23670b3add2cb845b9606d13e6aad6360f11 Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Sat, 3 Oct 2015 00:46:44 +0300
Subject: Add basic support for own collision types.

---
 src/emap/init.c |  3 +++
 src/emap/map.c  | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/emap/map.h  |  6 +++++
 3 files changed, 88 insertions(+)

diff --git a/src/emap/init.c b/src/emap/init.c
index 09f3c1e..beff644 100644
--- a/src/emap/init.c
+++ b/src/emap/init.c
@@ -177,6 +177,9 @@ HPExport void plugin_init (void)
     addHookPre("unit->can_move", eunit_can_move);
     addHookPre("unit->walktoxy", eunit_walktoxy);
     addHookPre("mail->invalid_operation", email_invalid_operation);
+    addHookPre("map->cell2gat", emap_cell2gat);
+    addHookPre("map->gat2cell", emap_gat2cell);
+    addHookPre("map->getcellp", emap_getcellp);
     addHookPre("script->set_reg_npc_num", eset_reg_npcscope_num);
     addHookPre("script->get_val_npc_num", eget_val_npcscope_num);
     addHookPre("script->get_val_ref_num", eget_val_npcscope_num);
diff --git a/src/emap/map.c b/src/emap/map.c
index fc5e37d..97aa464 100644
--- a/src/emap/map.c
+++ b/src/emap/map.c
@@ -134,3 +134,82 @@ void emap_online_list(int fd)
     send_online_list(fd, buf, ptr - buf);
     aFree(buf);
 }
+
+int emap_getcellp(struct map_data* m,
+                  const struct block_list *bl,
+                  int16 *xPtr, int16 *yPtr,
+                  cell_chk *cellchkPtr)
+{
+    if (bl)
+    {
+        const cell_chk cellchk = *cellchkPtr;
+        if (cellchk == CELL_CHKWALL ||
+            cellchk == CELL_CHKPASS ||
+            cellchk == CELL_CHKNOPASS ||
+            cellchk == CELL_CHKNOREACH)
+        {
+            if (bl->type == BL_NPC)
+            {
+            }
+        }
+    }
+    return 0;
+}
+
+struct mapcell emap_gat2cell(int *gatPtr)
+{
+    struct mapcell cell;
+    const int gat = *gatPtr;
+
+    memset(&cell, 0, sizeof(struct mapcell));
+
+    switch (gat)
+    {
+        case 0: // walkable ground
+            cell.walkable  = 1;
+            cell.shootable = 1;
+            cell.water     = 0;
+            break;
+        case 1: // wall
+            cell.walkable  = 0;
+            cell.shootable = 0;
+            cell.water     = 0;
+            break;
+        case 2: // air allowed
+            cell.walkable  = 0;
+            cell.shootable = 0;
+            cell.water     = 0;
+            break;
+        case 3: // unwalkable water
+            cell.walkable  = 0;
+            cell.shootable = 1;
+            cell.water     = 1;
+            break;
+        case 4: // sit, walkable ground
+            cell.walkable  = 1;
+            cell.shootable = 1;
+            cell.water     = 0;
+            break;
+        default:
+            ShowWarning("map_gat2cell: unrecognized gat type '%d'\n", gat);
+            break;
+    }
+
+    hookStop();
+    return cell;
+}
+
+int emap_cell2gat(struct mapcell *cellPtr)
+{
+    struct mapcell cell = *cellPtr;
+    hookStop();
+    if (cell.walkable == 1 && cell.shootable == 1 && cell.water == 0)
+        return 0;
+    if (cell.walkable == 0 && cell.shootable == 0 && cell.water == 0)
+        return 1;
+    if (cell.walkable == 0 && cell.shootable == 1 && cell.water == 1)
+        return 3;
+
+    ShowWarning("map_cell2gat: cell has no matching gat type\n");
+    return 1;
+}
diff --git a/src/emap/map.h b/src/emap/map.h
index cd8dac8..5c6e899 100644
--- a/src/emap/map.h
+++ b/src/emap/map.h
@@ -16,5 +16,11 @@ int emap_addflooritem_post(int retVal,
                            int *third_charid,
                            int *flags);
 void emap_online_list(int fd);
+int emap_getcellp(struct map_data* m,
+                  const struct block_list *bl,
+                  int16 *xPtr, int16 *yPtr,
+                  cell_chk *cellchkPtr);
+struct mapcell emap_gat2cell(int *gatPtr);
+int emap_cell2gat(struct mapcell *cellPtr);
 
 #endif  // EVOL_MAP_MAP
-- 
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