(Bugs 5237 and 7979)

- Land Protector now behaves more like on official servers
  * Land Protector now protects from units being placed on it, no matter if they have splash range or not
  * Land Protector no longer protects from damage from units not outside Land Protector that splash inside
  * Meteor Storm no longer shows meteors falling if they would land on Land Protector
  * Pneuma can no longer be placed next to Land Protector
  * Safety wall no longer consumes gem if cast on LP.
  * Also cleaned up the code a bit, so the checks are done where they should be done
- Ground skill splash ranges updated to their official values
  * Lord of Vermilion places units in a 11x11 area with 3x3 splash range each
  * Storm Gust places units in a 9x9 area with 3x3 splash range each
  * Heaven's Drive places units in a 5x5 area with no splash range
  * Venom Dust now has a splash range of 3x3 and is consequently larger than before
- Storm Gust's knock-back behavior updated to official
  * Each of Storm Gust's units will knock back "Away from center"
  * As units in the south-west are processed first, the knock-back direction will usually be north-east
  * At the edges the knock-back direction will be "to the outside"
  * Land Protector and Ganbantein will influence the knock-back behavior strongly, e.g. if Storm Gust has a hole in the middle, it will have a "suck in" effect
  * Added a config option for those who want the old "random direction" behavior from eAthena

7 files changed, 33 insertions, 28 deletions

diff --git a/conf/battle/skill.conf b/conf/battle/skill.conf
index e6828749b..a870b6c85 100644
--- a/conf/battle/skill.conf
+++ b/conf/battle/skill.conf
@@ -293,4 +293,11 @@ mob_max_skilllvl: 100
 // 1: Gutter line system without demi gutter bug
 // 2-20: Area around caster (2 = 5x5, 3 = 7x7, 4 = 9x9, ..., 20 = 41x41)
 // Note: If you knock the target out of the area it will only be hit once and won't do splash damage
-bowling_bash_area: 0
\ No newline at end of file
+bowling_bash_area: 0
+
+// On official servers, Storm Gust consists of 81 units that all deal 3x3 splash damage "away from center". Due to
+// south-western cells being processed first, this usually leads to a knockback to the northeast. Knockback at the
+// edges will be away from SG. Knockback direction can also be influenced by Ganbantein and Land Protector. If you
+// punch a hole into SG it will for example create a "suck in" effect.
+// If you disable this setting, the knockback direction will be completely random (eAthena style).
+stormgust_knockback: yes
\ No newline at end of file
diff --git a/db/pre-re/skill_unit_db.txt b/db/pre-re/skill_unit_db.txt
index bba3670e8..196a79d5b 100644
--- a/db/pre-re/skill_unit_db.txt
+++ b/db/pre-re/skill_unit_db.txt
@@ -4,7 +4,7 @@
 // target = friend (party +guildmates +neutral players) / party / guild
 //          ally (party +guildmates) / all / sameguild (guild but no allies) / enemy
 // flag 0x001(UF_DEFNOTENEMY)		If 'defunit_not_enemy' is set, the target is changed to 'friend'
-//      0x002(UF_NOREITERRATION)	Spell cannot be stacked
+//      0x002(UF_NOREITERATION)	Spell cannot be stacked
 //      0x004(UF_NOFOOTSET)		Spell cannot be cast near/on targets
 //      0x008(UF_NOOVERLAP)		Spell effects do not overlap
 //      0x010(UF_PATHCHECK)	Only cells with a shootable path will be placed
@@ -35,10 +35,10 @@
  79,0x84,    , -1, 1,3000,enemy, 0x018	//PR_MAGNUS
  80,0x87,0x88,  0, 1,2000,enemy, 0x006	//WZ_FIREPILLAR
  83,0x86,    ,  0, 3,1000,enemy, 0x010	//WZ_METEOR
- 85,0x86,    ,  0, 6:6:6:6:6:6:6:6:6:6:8,1250,enemy,0x018	//WZ_VERMILION
+ 85,0x86,    ,  5, 1:1:1:1:1:1:1:1:1:1:3,1250,enemy,0x018	//WZ_VERMILION
  87,0x8d,    , -1, 0,  -1,all,   0x010	//WZ_ICEWALL
- 89,0x86,    ,  0, 5, 450,enemy, 0x018	//WZ_STORMGUST
- 91,0x86,    ,  0, 2,1000,enemy, 0x010	//WZ_HEAVENDRIVE
+ 89,0x86,    ,  4, 1, 450,enemy, 0x018	//WZ_STORMGUST
+ 91,0x86,    ,  2, 0,1000,enemy, 0x010	//WZ_HEAVENDRIVE
  92,0x8e,    ,  2, 0,  -1,enemy, 0x010	//WZ_QUAGMIRE
 115,0x90,    ,  0, 1,1000,enemy, 0x006	//HT_SKIDTRAP
 116,0x93,    ,  0, 1,1000,enemy, 0x006	//HT_LANDMINE
@@ -50,7 +50,7 @@
 122,0x8f,    ,  0, 1,1000,enemy, 0x006	//HT_BLASTMINE
 123,0x98,    ,  0, 1,1000,enemy, 0x006	//HT_CLAYMORETRAP
 125,0x99,    ,  0, 1,1000,all,   0x000	//HT_TALKIEBOX
-140,0x92,    , -1, 0,1000,enemy, 0x000	//AS_VENOMDUST
+140,0x92,    , -1, 1,1000,enemy, 0x000	//AS_VENOMDUST
 220,0xb0,    ,  0, 0,  -1,all,   0x002	//RG_GRAFFITI
 229,0xb1,    ,  0, 1,1000,enemy, 0x006	//AM_DEMONSTRATION
 254,0x86,    , -1, 0, 300,enemy, 0x010	//CR_GRANDCROSS
diff --git a/db/re/skill_unit_db.txt b/db/re/skill_unit_db.txt
index 1f93d771f..87afd2da2 100644
--- a/db/re/skill_unit_db.txt
+++ b/db/re/skill_unit_db.txt
@@ -4,7 +4,7 @@
 // target = friend (party +guildmates +neutral players) / party / guild
 //          ally (party +guildmates) / all / sameguild (guild but no allies) / enemy
 // flag 0x001(UF_DEFNOTENEMY)		If 'defunit_not_enemy' is set, the target is changed to 'friend'
-//      0x002(UF_NOREITERRATION)	Spell cannot be stacked
+//      0x002(UF_NOREITERATION)	Spell cannot be stacked
 //      0x004(UF_NOFOOTSET)		Spell cannot be cast near/on targets
 //      0x008(UF_NOOVERLAP)		Spell effects do not overlap
 //      0x010(UF_PATHCHECK)	Only cells with a shootable path will be placed
@@ -35,10 +35,10 @@
  79,0x84,    , -1, 1,3000,enemy, 0x018	//PR_MAGNUS
  80,0x87,0x88,  0, 1,2000,enemy, 0x006	//WZ_FIREPILLAR
  83,0x86,    ,  0, 3,1000,enemy, 0x010	//WZ_METEOR
- 85,0x86,    ,  0, 6:6:6:6:6:6:6:6:6:6:8,1250,enemy,0x018	//WZ_VERMILION
+ 85,0x86,    ,  5, 1:1:1:1:1:1:1:1:1:1:3,1250,enemy,0x018	//WZ_VERMILION
  87,0x8d,    , -1, 0,  -1,all,   0x010	//WZ_ICEWALL
- 89,0x86,    ,  0, 5, 450,enemy, 0x018	//WZ_STORMGUST
- 91,0x86,    ,  0, 2,1000,enemy, 0x010	//WZ_HEAVENDRIVE
+ 89,0x86,    ,  4, 1, 450,enemy, 0x018	//WZ_STORMGUST
+ 91,0x86,    ,  2, 0,1000,enemy, 0x010	//WZ_HEAVENDRIVE
  92,0x8e,    ,  2, 0,  -1,enemy, 0x010	//WZ_QUAGMIRE
 115,0x90,    ,  0, 1,1000,enemy, 0x006	//HT_SKIDTRAP
 116,0x93,    ,  0, 1,1000,enemy, 0x006	//HT_LANDMINE
@@ -50,7 +50,7 @@
 122,0x8f,    ,  0, 1,1000,enemy, 0x006	//HT_BLASTMINE
 123,0x98,    ,  0, 1,1000,enemy, 0x006	//HT_CLAYMORETRAP
 125,0x99,    ,  0, 1,1000,all,   0x000	//HT_TALKIEBOX
-140,0x92,    , -1, 0,1000,enemy, 0x000	//AS_VENOMDUST
+140,0x92,    , -1, 1,1000,enemy, 0x000	//AS_VENOMDUST
 220,0xb0,    ,  0, 0,  -1,all,   0x002	//RG_GRAFFITI
 229,0xb1,    ,  0, 1,1000,enemy, 0x006	//AM_DEMONSTRATION
 254,0x86,    , -1, 0, 300,enemy, 0x010	//CR_GRANDCROSS
diff --git a/src/map/battle.c b/src/map/battle.c
index 9ee4695f7..1563553d4 100644
--- a/src/map/battle.c
+++ b/src/map/battle.c
@@ -6839,6 +6839,7 @@ static const struct battle_data {
 	{ "guild_castle_expulsion",             &battle_config.guild_castle_expulsion,          0,      0,      1,              },
 	{ "song_timer_reset",                   &battle_config.song_timer_reset,                0,      0,      1,              },
 	{ "snap_dodge",                         &battle_config.snap_dodge,                      0,      0,      1,              },
+	{ "stormgust_knockback",				&battle_config.stormgust_knockback,				1,		0,		1,				},
 	{ "monster_chase_refresh",              &battle_config.mob_chase_refresh,               1,      0,      30,             },
 	{ "mob_icewall_walk_block",             &battle_config.mob_icewall_walk_block,          75,     0,      255,            },
 	{ "boss_icewall_walk_block",            &battle_config.boss_icewall_walk_block,         0,      0,      255,            },
diff --git a/src/map/battle.h b/src/map/battle.h
index ad879bd1a..e80e0091d 100644
--- a/src/map/battle.h
+++ b/src/map/battle.h
@@ -482,6 +482,7 @@ struct Battle_Config {
 
 	int song_timer_reset; // [csnv]
 	int snap_dodge; // Enable or disable dodging damage snapping away [csnv]
+	int stormgust_knockback;
 
 	int feature_roulette;
 };
diff --git a/src/map/skill.c b/src/map/skill.c
index 169f4bcb9..938b36419 100644
--- a/src/map/skill.c
+++ b/src/map/skill.c
@@ -2658,7 +2658,8 @@ int skill_attack(int attack_type, struct block_list* src, struct block_list *dsr
 				break;
 			// This ensures the storm randomly pushes instead of exactly a cell backwards per official mechanics.
 			case WZ_STORMGUST:
-				dir = rnd()%8;
+				if(!battle_config.stormgust_knockback)
+					dir = rand()%8;
 				break;
 			case WL_CRIMSONROCK:
 				dir = map->calc_dir(bl,skill->area_temp[4],skill->area_temp[5]);
@@ -2856,9 +2857,11 @@ int skill_check_unit_range_sub (struct block_list *bl, va_list ap) {
 	g_skill_id = su->group->skill_id;
 
 	switch (skill_id) {
-		case MH_STEINWAND:
-		case MG_SAFETYWALL:
 		case AL_PNEUMA:
+		case MG_SAFETYWALL:
+			if(g_skill_id == SA_LANDPROTECTOR)
+				break;
+		case MH_STEINWAND:
 		case SC_MAELSTROM:
 		case SO_ELEMENTAL_SHIELD:
 			if(g_skill_id != MH_STEINWAND && g_skill_id != MG_SAFETYWALL && g_skill_id != AL_PNEUMA && g_skill_id != SC_MAELSTROM && g_skill_id != SO_ELEMENTAL_SHIELD)
@@ -3303,7 +3306,8 @@ int skill_timerskill(int tid, int64 tick, int id, intptr_t data) {
 						int x = skl->type>>16, y = skl->type&0xFFFF;
 						if( path->search_long(NULL, src->m, src->x, src->y, x, y, CELL_CHKWALL) )
 							skill->unitsetting(src,skl->skill_id,skl->skill_lv,x,y,skl->flag);
-						if( path->search_long(NULL, src->m, src->x, src->y, skl->x, skl->y, CELL_CHKWALL) )
+						if( path->search_long(NULL, src->m, src->x, src->y, skl->x, skl->y, CELL_CHKWALL)
+							&& !map->getcell(src->m, skl->x, skl->y, CELL_CHKLANDPROTECTOR) )
 							clif->skill_poseffect(src,skl->skill_id,skl->skill_lv,skl->x,skl->y,tick);
 					}
 					else if( path->search_long(NULL, src->m, src->x, src->y, skl->x, skl->y, CELL_CHKWALL) )
@@ -10265,7 +10269,8 @@ int skill_castend_pos2(struct block_list* src, int x, int y, uint16 skill_id, ui
 					tmpx = x - area + rnd()%(area * 2 + 1);
 					tmpy = y - area + rnd()%(area * 2 + 1);
 
-					if( i == 0 && path->search_long(NULL, src->m, src->x, src->y, tmpx, tmpy, CELL_CHKWALL) )
+					if( i == 0 && path->search_long(NULL, src->m, src->x, src->y, tmpx, tmpy, CELL_CHKWALL)
+						&& !map->getcell(src->m, tmpx, tmpy, CELL_CHKLANDPROTECTOR))
 						clif->skill_poseffect(src,skill_id,skill_lv,tmpx,tmpy,tick);
 
 					if( i > 0 )
@@ -11288,8 +11293,7 @@ struct skill_unit_group* skill_unitsetting(struct block_list *src, uint16 skill_
 		if (skill->get_unit_flag(skill_id) & UF_RANGEDSINGLEUNIT && i == (layout->count / 2))
 			val2 |= UF_RANGEDSINGLEUNIT; // center.
 
-		if( range <= 0 )
-			map->foreachincell(skill->cell_overlap,src->m,ux,uy,BL_SKILL,skill_id, &alive, src);
+		map->foreachincell(skill->cell_overlap,src->m,ux,uy,BL_SKILL,skill_id, &alive, src);
 		if( !alive )
 			continue;
 
@@ -11344,7 +11348,7 @@ int skill_unit_onplace(struct skill_unit *src, struct block_list *bl, int64 tick
 	nullpo_ret(sg=src->group);
 	nullpo_ret(ss=map->id2bl(sg->src_id));
 
-	if( skill->get_type(sg->skill_id) == BF_MAGIC && map->getcell(bl->m, bl->x, bl->y, CELL_CHKLANDPROTECTOR) && sg->skill_id != SA_LANDPROTECTOR )
+	if( skill->get_type(sg->skill_id) == BF_MAGIC && map->getcell(src->bl.m, src->bl.x, src->bl.y, CELL_CHKLANDPROTECTOR) && sg->skill_id != SA_LANDPROTECTOR )
 		return 0; //AoE skills are ineffective. [Skotlex]
 	sc = status->get_sc(bl);
 
@@ -16010,7 +16014,7 @@ int skill_unit_timer_sub_onplace(struct block_list* bl, va_list ap) {
 
 	nullpo_ret(group);
 
-	if( !(skill->get_inf2(group->skill_id)&(INF2_SONG_DANCE|INF2_TRAP|INF2_NOLP)) && map->getcell(bl->m, bl->x, bl->y, CELL_CHKLANDPROTECTOR) )
+	if( !(skill->get_inf2(group->skill_id)&(INF2_SONG_DANCE|INF2_TRAP|INF2_NOLP)) && map->getcell(su->bl.m, su->bl.x, su->bl.y, CELL_CHKLANDPROTECTOR) )
 		return 0; //AoE skills are ineffective. [Skotlex]
 
 	if( battle->check_target(&su->bl,bl,group->target_flag) <= 0 )
diff --git a/src/map/unit.c b/src/map/unit.c
index 2ab13b121..c00a0631d 100644
--- a/src/map/unit.c
+++ b/src/map/unit.c
@@ -1619,14 +1619,6 @@ int unit_skilluse_pos2( struct block_list *src, short skill_x, short skill_y, ui
 		if( skill->not_ok(skill_id, sd) || !skill->check_condition_castbegin(sd, skill_id, skill_lv) )
 			return 0;
 		/**
-		 * "WHY IS IT HEREE": pneuma cannot be canceled past this point, the client displays the animation even,
-		 * if we cancel it from nodamage_id, so it has to be here for it to not display the animation.
-		 **/
-		if( skill_id == AL_PNEUMA && map->getcell(src->m, skill_x, skill_y, CELL_CHKLANDPROTECTOR) ) {
-			clif->skill_fail(sd,skill_id,USESKILL_FAIL_LEVEL,0);
-			return 0;
-		}
-		/**
 		 * "WHY IS IT HEREE": ice wall cannot be canceled past this point, the client displays the animation even,
 		 * if we cancel it from castend_pos, so it has to be here for it to not display the animation.
 		 **/