v2.3.2: improved item placement logic in shops.

This improves layouts and also fixes seed problems with varying item count

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/special/ShopRoom.java

@@ -22,6 +22,7 @@
 package com.shatteredpixel.shatteredpixeldungeon.levels.rooms.special;
 
 import com.shatteredpixel.shatteredpixeldungeon.Dungeon;
+import com.shatteredpixel.shatteredpixeldungeon.ShatteredPixelDungeon;
 import com.shatteredpixel.shatteredpixeldungeon.actors.hero.Belongings;
 import com.shatteredpixel.shatteredpixeldungeon.actors.mobs.Mob;
 import com.shatteredpixel.shatteredpixeldungeon.actors.mobs.npcs.Shopkeeper;
@@ -111,38 +112,88 @@ public class ShopRoom extends SpecialRoom {
 			itemsToSpawn = generateItems();
 		}
 
-		Point itemPlacement = new Point(entrance());
-		if (itemPlacement.y == top){
-			itemPlacement.y++;
-		} else if (itemPlacement.y == bottom) {
-			itemPlacement.y--;
-		} else if (itemPlacement.x == left){
-			itemPlacement.x++;
+		Point entryInset = new Point(entrance());
+		if (entryInset.y == top){
+			entryInset.y++;
+		} else if (entryInset.y == bottom) {
+			entryInset.y--;
+		} else if (entryInset.x == left){
+			entryInset.x++;
 		} else {
-			itemPlacement.x--;
+			entryInset.x--;
 		}
 
-		for (Item item : itemsToSpawn) {
+		Point curItemPlace = entryInset.clone();
 
-			if (itemPlacement.x == left+1 && itemPlacement.y != top+1){
-				itemPlacement.y--;
-			} else if (itemPlacement.y == top+1 && itemPlacement.x != right-1){
-				itemPlacement.x++;
-			} else if (itemPlacement.x == right-1 && itemPlacement.y != bottom-1){
-				itemPlacement.y++;
+		int inset = 1;
+
+		for (Item item : itemsToSpawn.toArray(new Item[0])) {
+
+			//place items in a clockwise pattern
+			if (curItemPlace.x == left+inset && curItemPlace.y != top+inset){
+				curItemPlace.y--;
+			} else if (curItemPlace.y == top+inset && curItemPlace.x != right-inset){
+				curItemPlace.x++;
+			} else if (curItemPlace.x == right-inset && curItemPlace.y != bottom-inset){
+				curItemPlace.y++;
 			} else {
-				itemPlacement.x--;
+				curItemPlace.x--;
 			}
 
-			int cell = level.pointToCell(itemPlacement);
+			//once we get to the inset from the entrance again, move another cell inward and loop
+			if (curItemPlace.equals(entryInset)){
 
-			if (level.heaps.get( cell ) != null) {
-				do {
-					cell = level.pointToCell(random());
-				} while (level.heaps.get( cell ) != null || level.findMob( cell ) != null);
+				if (entryInset.y == top+inset){
+					entryInset.y++;
+				} else if (entryInset.y == bottom-inset){
+					entryInset.y--;
+				}
+				if (entryInset.x == left+inset){
+					entryInset.x++;
+				} else if (entryInset.x == right-inset){
+					entryInset.x--;
+				}
+				inset++;
+
+				if (inset > (Math.min(width(), height())-3)/2){
+					break; //out of space!
+				}
+
+				curItemPlace = entryInset.clone();
+
+				//make sure to step forward again
+				if (curItemPlace.x == left+inset && curItemPlace.y != top+inset){
+					curItemPlace.y--;
+				} else if (curItemPlace.y == top+inset && curItemPlace.x != right-inset){
+					curItemPlace.x++;
+				} else if (curItemPlace.x == right-inset && curItemPlace.y != bottom-inset){
+					curItemPlace.y++;
+				} else {
+					curItemPlace.x--;
+				}
 			}
 
+			int cell = level.pointToCell(curItemPlace);
 			level.drop( item, cell ).type = Heap.Type.FOR_SALE;
+			itemsToSpawn.remove(item);
+		}
+
+		//we didn't have enough space to place everything neatly, so now just fill in anything left
+		if (!itemsToSpawn.isEmpty()){
+			for (Point p : getPoints()){
+				int cell = level.pointToCell(p);
+				if ((level.map[cell] == Terrain.EMPTY_SP || level.map[cell] == Terrain.EMPTY)
+						&& level.heaps.get(cell) == null && level.findMob(cell) == null){
+					level.drop( itemsToSpawn.remove(0), level.pointToCell(p) ).type = Heap.Type.FOR_SALE;
+				}
+				if (itemsToSpawn.isEmpty()){
+					break;
+				}
+			}
+		}
+
+		if (!itemsToSpawn.isEmpty()){
+			ShatteredPixelDungeon.reportException(new RuntimeException("failed to place all items in a shop!"));
 		}
 
 	}
@@ -270,11 +321,6 @@ public class ShopRoom extends SpecialRoom {
 		rare.cursedKnown = true;
 		itemsToSpawn.add( rare );
 
-		//hard limit is 63 items + 1 shopkeeper, as shops can't be bigger than 8x8=64 internally
-		if (itemsToSpawn.size() > 63) {
-			throw new RuntimeException("Shop attempted to carry more than 63 items!");
-		}
-
 		//use a new generator here to prevent items in shop stock affecting levelgen RNG (e.g. sandbags)
 		//we can use a random long for the seed as it will be the same long every time
 		Random.pushGenerator(Random.Long());

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/ImpShopRoom.java

@@ -91,7 +91,7 @@ public class ImpShopRoom extends ShopRoom {
 	//fix for connections not being bundled normally
 	@Override
 	public Door entrance() {
-		return connected.isEmpty() ? new Door(left, top+2) : super.entrance();
+		return connected.isEmpty() ? new Door((left+right)/2 + 1, bottom-1) : super.entrance();
 	}
 
 	public void spawnShop(Level level){