From d2111363fea81d55450430a92e371d3a606e4629 Mon Sep 17 00:00:00 2001
From: skotlex <skotlex@54d463be-8e91-2dee-dedb-b68131a5f0ec>
Date: Mon, 13 Feb 2006 04:04:46 +0000
Subject: - Added CELL_CHKSTACK to check if a map cell is stacked (CELL_NOSTACK
 server mod) - Added flag 0x3000 to path_search to specify that path searching
 should go through stacked cells. Used for skill_wall_check calls. - easy
 path_search will be successful in CELL_NOSTACK mode if the search fails only
 on the target cell (it is presumed the target cell contains the character one
 is trying to reach). The walk routines will take care of stopping the
 character from walking into another one when stacked.

git-svn-id: https://rathena.svn.sourceforge.net/svnroot/rathena/trunk@5263 54d463be-8e91-2dee-dedb-b68131a5f0ec
---
 src/map/map.c   |  6 ++++++
 src/map/map.h   |  1 +
 src/map/path.c  | 25 ++++++++++++++++++++++++-
 src/map/skill.c |  2 +-
 4 files changed, 32 insertions(+), 2 deletions(-)

(limited to 'src/map')

diff --git a/src/map/map.c b/src/map/map.c
index df3302313..d7cfa11db 100644
--- a/src/map/map.c
+++ b/src/map/map.c
@@ -2160,6 +2160,12 @@ int map_getcellp(struct map_data* m,int x,int y,cell_t cellchk)
 			if (type3 >= battle_config.cell_stack_limit) return 1;
 #endif
 			return (type==1 || type==5 || type2&(CELL_MOONLIT|CELL_ICEWALL));
+		case CELL_CHKSTACK:
+#ifdef CELL_NOSTACK
+			return (type3 >= battle_config.cell_stack_limit);
+#else
+			return 0;
+#endif
 		case CELL_CHKWALL:
 			return (type==1/* || type2&CELL_ICEWALL*/); //Uncomment to prevent sniping/casting through the icewall. [Skotlex]
 		case CELL_CHKWATER:
diff --git a/src/map/map.h b/src/map/map.h
index a8867b934..3a97991cb 100644
--- a/src/map/map.h
+++ b/src/map/map.h
@@ -1138,6 +1138,7 @@ typedef enum {
 	CELL_CHKNOPASS,		// 通過不可(セルタイプ1,5)
 	CELL_GETTYPE,		// セルタイプを返す
 	CELL_GETCELLTYPE,
+	CELL_CHKSTACK,
 	CELL_CHKNPC=0x10,	// タッチタイプのNPC(セルタイプ0x80フラグ)
 	CELL_CHKREGEN,		// cells that improve regeneration
 	CELL_CHKPNEUMA,
diff --git a/src/map/path.c b/src/map/path.c
index ad5c06f0f..7cab27683 100644
--- a/src/map/path.c
+++ b/src/map/path.c
@@ -172,6 +172,11 @@ static int can_place(struct map_data *m,int x,int y,int flag)
 		return 1;
 	if((flag&0x10000)&&map_getcellp(m,x,y,CELL_CHKGROUND))
 		return 1;
+#ifdef CELL_NOSTACK
+	//Special flag for CELL_NOSTACK systems. Returns true when the given cell is stacked. [Skotlex]
+	if((flag&0x30000)&&map_getcellp(m,x,y,CELL_CHKSTACK))
+		return 1;
+#endif
 	return 0;
 }
 
@@ -332,9 +337,18 @@ int path_search(struct walkpath_data *wpd,int m,int x0,int y0,int x1,int y1,int
 	if(!map[m].gat)
 		return -1;
 	md=&map[m];
-	if(x1<0 || x1>=md->xs || y1<0 || y1>=md->ys || map_getcellp(md,x1,y1,CELL_CHKNOPASS))
+
+	if(x1<0 || x1>=md->xs || y1<0 || y1>=md->ys)
 		return -1;
 
+#ifdef CELL_NOSTACK
+	if (map_getcellp(md,x1,y1,CELL_CHKNOPASS) && !map_getcellp(md,x1,y1,CELL_CHKSTACK))
+		return -1;
+#else
+	if (map_getcellp(md,x1,y1,CELL_CHKNOPASS))
+		return -1;
+#endif
+
 	// easy
 	dx = (x1-x0<0) ? -1 : 1;
 	dy = (y1-y0<0) ? -1 : 1;
@@ -366,6 +380,15 @@ int path_search(struct walkpath_data *wpd,int m,int x0,int y0,int x1,int y1,int
 		return 0;
 	}
 	
+#ifdef CELL_NOSTACK
+	//If you fail by 1 cell, consider easy path successful, too. [Skotlex]
+	if (check_distance(x-x1,y-y1,1)) {
+		wpd->path_len=i;
+		wpd->path_pos=0;
+		wpd->path_half=0;
+		return 0;
+	}
+#endif
 	if(flag&1)
 		return -1;
 
diff --git a/src/map/skill.c b/src/map/skill.c
index 4b77391a2..d10aaf4ea 100644
--- a/src/map/skill.c
+++ b/src/map/skill.c
@@ -6696,7 +6696,7 @@ struct skill_unit_group *skill_unitsetting( struct block_list *src, int skillid,
 		if (alive && battle_config.skill_wall_check) {
 			//Check if there's a path between cell and center of casting.
 			struct walkpath_data wpd;
-			if (path_search(&wpd,src->m,ux,uy,x,y,1)==-1)
+			if (path_search(&wpd,src->m,ux,uy,x,y,0x30001)==-1)
 				alive = 0;
 		}
 					
-- 
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