Copy all terrain features on clone(), not just first

Use terrainFeatures in naturalWonderGenerator

core/src/com/unciv/logic/GameInfo.kt

@@ -206,7 +206,7 @@ class GameInfo {
         val tilesWithin3ofExistingEncampment = existingEncampments.asSequence()
                 .flatMap { it.getTilesInDistance(3) }.toSet()
         val viableTiles = tileMap.values.filter {
-            it.isLand && it.terrainFeature == null
+            it.isLand && it.terrainFeatures.isEmpty()
                     && !it.isImpassible()
                     && it !in tilesWithin3ofExistingEncampment
                     && it !in allViewableTiles

core/src/com/unciv/logic/map/TileInfo.kt

@@ -50,6 +50,7 @@ open class TileInfo {
     var position: Vector2 = Vector2.Zero
     lateinit var baseTerrain: String
     val terrainFeatures: ArrayList<String> = ArrayList()
+    @Transient // So it won't be serialized from now on
     var terrainFeature: String? = null
         get() = terrainFeatures.firstOrNull() ?: field //if terrainFeatures contains no terrainFeature maybe one got deserialized to field
         set(value) {
@@ -86,7 +87,8 @@ open class TileInfo {
         for (airUnit in airUnits) toReturn.airUnits.add(airUnit.clone())
         toReturn.position = position.cpy()
         toReturn.baseTerrain = baseTerrain
-        toReturn.terrainFeature = terrainFeature
+//        toReturn.terrainFeature = terrainFeature
+        toReturn.terrainFeatures.addAll(terrainFeatures)
         toReturn.naturalWonder = naturalWonder
         toReturn.resource = resource
         toReturn.improvement = improvement
@@ -361,7 +363,7 @@ open class TileInfo {
         }
     }
 
-    fun cimatchesUniqueFilter(filter: String, civInfo: CivilizationInfo?=null): Boolean {
+    fun matchesUniqueFilter(filter: String, civInfo: CivilizationInfo?=null): Boolean {
         return filter == baseTerrain
                 || filter == Constants.hill && isHill()
                 || filter == "River" && isAdjacentToRiver()
@@ -533,8 +535,9 @@ open class TileInfo {
 
     //region state-changing functions
     fun setTransients() {
-        if (terrainFeatures.firstOrNull() == null && terrainFeature != null)// -> terranFeature getter returns terrainFeature field
+        if (terrainFeatures.firstOrNull() == null && terrainFeature != null) {// -> terranFeature getter returns terrainFeature field
             terrainFeature = terrainFeature // getter returns field, setter calls terrainFeatures.add()
+        }
         setTerrainTransients()
         setUnitTransients(true)
     }

core/src/com/unciv/logic/map/mapgenerator/NaturalWonderGenerator.kt

@@ -61,9 +61,9 @@ class NaturalWonderGenerator(val ruleset: Ruleset) {
     private fun trySpawnOnSuitableLocation(suitableLocations: List<TileInfo>, wonder: Terrain): TileInfo? {
         if (suitableLocations.isNotEmpty()) {
             val location = suitableLocations.random()
+            clearTile(location)
             location.naturalWonder = wonder.name
             location.baseTerrain = wonder.turnsInto!!
-            location.terrainFeature = null
             return location
         }
 
@@ -146,17 +146,13 @@ class NaturalWonderGenerator(val ruleset: Ruleset) {
 
         val location = trySpawnOnSuitableLocation(suitableLocations, wonder)
         if (location != null) {
-            val location2 = location.neighbors
+            val possibleLocations = location.neighbors
                     .filter {
                         it.resource == null && it.improvement == null
                                 && wonder.occursOn.contains(it.getLastTerrain().name)
                                 && it.neighbors.all { it.isWater }
-                    }
-                    .toList().random()
-
-            location2.naturalWonder = wonder.name
-            location2.baseTerrain = wonder.turnsInto!!
-            location2.terrainFeature = null
+                    }.toList()
+            trySpawnOnSuitableLocation(possibleLocations, wonder)
         }
     }
 
@@ -178,10 +174,7 @@ class NaturalWonderGenerator(val ruleset: Ruleset) {
             for (tile in location.neighbors) {
                 if (tile.baseTerrain == Constants.coast) continue
                 tile.baseTerrain = Constants.coast
-                tile.terrainFeature = null
-                tile.resource = null
-                tile.improvement = null
-                tile.setTerrainTransients()
+                clearTile(tile)
             }
         }
     }
@@ -214,10 +207,7 @@ class NaturalWonderGenerator(val ruleset: Ruleset) {
                     }
 
                 tile.baseTerrain = Constants.coast
-                tile.terrainFeature = null
-                tile.resource = null
-                tile.improvement = null
-                tile.setTerrainTransients()
+                clearTile(tile)
             }
         }
     }
@@ -284,4 +274,11 @@ class NaturalWonderGenerator(val ruleset: Ruleset) {
 
         trySpawnOnSuitableLocation(suitableLocations, wonder)
     }
+
+    private fun clearTile(tile: TileInfo){
+        tile.terrainFeatures.clear()
+        tile.resource = null
+        tile.improvement = null
+        tile.setTerrainTransients()
+    }
 }