- consolidated Duke’s ‚away from wall‘ check in the backend

This was also very useful in SW to avoid spawning ‚floating‘ footprints due to lack of an equivalent check in the original.

source/core/gamefuncs.cpp

@@ -560,6 +560,35 @@ sectortype* nextsectorneighborzptr(sectortype* sectp, double startz, int flags)
 	return bestsec;
 }
 
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+bool isAwayFromWall(DCoreActor* ac, double delta)
+{
+	sectortype* s1;
+
+	updatesector(ac->spr.pos + DVector2(delta, delta), &s1);
+	if (s1 == ac->sector())
+	{
+		updatesector(ac->spr.pos - DVector2(delta, delta), &s1);
+		if (s1 == ac->sector())
+		{
+			updatesector(ac->spr.pos + DVector2(delta, -delta), &s1);
+			if (s1 == ac->sector())
+			{
+				updatesector(ac->spr.pos + DVector2(-delta, delta), &s1);
+				if (s1 == ac->sector())
+					return true;
+			}
+		}
+	}
+	return false;
+}
+
 //==========================================================================
 //
 // 

source/core/gamefuncs.h

@@ -350,7 +350,7 @@ enum EFindNextSector
 	Find_FloorDown = Find_Floor | Find_Down,
 };
 sectortype* nextsectorneighborzptr(sectortype* sectp, double startz, int flags);
-
+bool isAwayFromWall(DCoreActor* ac, double delta);
 
 
 inline double WallStartX(int wallnum)

source/games/duke/src/gameexec.cpp

@@ -2801,23 +2801,7 @@ int ParseState::parse(void)
 	{
 		auto s1 = g_ac->sector();
 
-		j = 0;
+		j = isAwayFromWall(g_ac, 6.75);
-
-		updatesector(g_ac->int_pos().X + 108, g_ac->int_pos().Y + 108, &s1);
-		if (s1 == g_ac->sector())
-		{
-			updatesector(g_ac->int_pos().X - 108, g_ac->int_pos().Y - 108, &s1);
-			if (s1 == g_ac->sector())
-			{
-				updatesector(g_ac->int_pos().X + 108, g_ac->int_pos().Y - 108, &s1);
-				if (s1 == g_ac->sector())
-				{
-					updatesector(g_ac->int_pos().X - 108, g_ac->int_pos().Y + 108, &s1);
-					if (s1 == g_ac->sector())
-						j = 1;
-				}
-			}
-		}
 		parseifelse(j);
 		break;
 	}

source/games/duke/src/spawn.cpp

@@ -340,28 +340,12 @@ void spawntransporter(DDukeActor *actj, DDukeActor* act, bool beam)
 
 int spawnbloodpoolpart1(DDukeActor* act)
 {
-	auto s1 = act->sector();
+	bool away = isAwayFromWall(act, 6.75);
-
+	
-	updatesector(act->int_pos().X + 108, act->int_pos().Y + 108, &s1);
+	if (!away)
-	if (s1 && s1->floorz == act->sector()->floorz)
 	{
-		updatesector(act->int_pos().X - 108, act->int_pos().Y - 108, &s1);
+		act->spr.xrepeat = act->spr.yrepeat = 0; ChangeActorStat(act, STAT_MISC); return true;
-		if (s1 && s1->floorz == act->sector()->floorz)
-		{
-			updatesector(act->int_pos().X + 108, act->int_pos().Y - 108, &s1);
-			if (s1 && s1->floorz == act->sector()->floorz)
-			{
-				updatesector(act->int_pos().X - 108, act->int_pos().Y + 108, &s1);
-				if (s1 && s1->floorz != act->sector()->floorz)
-				{
-					act->spr.xrepeat = act->spr.yrepeat = 0; ChangeActorStat(act, STAT_MISC); return true;
-				}
-			}
-			else { act->spr.xrepeat = act->spr.yrepeat = 0; ChangeActorStat(act, STAT_MISC); return true; }
-		}
-		else { act->spr.xrepeat = act->spr.yrepeat = 0; ChangeActorStat(act, STAT_MISC); return true; }
 	}
-	else { act->spr.xrepeat = act->spr.yrepeat = 0; ChangeActorStat(act, STAT_MISC); return true; }
 
 	if (act->sector()->lotag == 1)
 	{
@@ -382,28 +366,12 @@ void initfootprint(DDukeActor* actj, DDukeActor* act)
 	auto sect = act->sector();
 	if (actj)
 	{
-		auto s1 = act->sector();
+		bool away = isAwayFromWall(act, 5.25);
-
+		if (!away)
-		updatesector(act->int_pos().X + 84, act->int_pos().Y + 84, &s1);
-		if (s1 && s1->floorz == act->sector()->floorz)
 		{
-			updatesector(act->int_pos().X - 84, act->int_pos().Y - 84, &s1);
+			act->spr.xrepeat = act->spr.yrepeat = 0;
-			if (s1 && s1->floorz == act->sector()->floorz)
+			return;
-			{
-				updatesector(act->int_pos().X + 84, act->int_pos().Y - 84, &s1);
-				if (s1 && s1->floorz == act->sector()->floorz)
-				{
-					updatesector(act->int_pos().X - 84, act->int_pos().Y + 84, &s1);
-					if (s1 && s1->floorz != act->sector()->floorz)
-					{
-						act->spr.xrepeat = act->spr.yrepeat = 0; ChangeActorStat(act, STAT_MISC); return;
-					}
-				}
-				else { act->spr.xrepeat = act->spr.yrepeat = 0; return; }
-			}
-			else { act->spr.xrepeat = act->spr.yrepeat = 0; return; }
 		}
-		else { act->spr.xrepeat = act->spr.yrepeat = 0; return; }
 
 		act->spr.cstat = CSTAT_SPRITE_ALIGNMENT_FLOOR;
 		if ((ps[actj->PlayerIndex()].footprintcount & 1)) act->spr.cstat |= CSTAT_SPRITE_XFLIP;

source/games/sw/src/weapon.cpp

@@ -18124,6 +18124,9 @@ int QueueFootPrint(DSWActor* actor)
 
     if (TestDontStickSector(actor->sector()))
         return -1;   // Not on special sectors you don't
+	
+	if (!isAwayFromWall(actor, 5.25))
+		return -1;	// not if it goes ouzside the sector
 
     // So, are we like, done checking now!?
     if (FloorBloodQueue[FloorBloodQueueHead] != nullptr)