Added Great Wall wonder

Credits.md

@@ -158,6 +158,7 @@ All the following are from [the Noun Project](https://thenounproject.com) licenc
 * [Bazaar](https://thenounproject.com/term/bazaar/902288/) By Tokka Elkholy
 * [Shekel Coin](https://thenounproject.com/term/shekel-coin/204154/) By Till Teenck for Mint
 * [Aqueduct](https://thenounproject.com/term/aqueduct/24639/) By Arthur Shlain
+* [Great Wall](https://thenounproject.com/search/?q=great%20wall&i=545909) By icon 54
  
 ### Medieval Era
 

android/assets/jsons/Buildings.json

@@ -42,6 +42,13 @@
 		greatPersonPoints:{production:1},
 		requiredTech:"Calendar"
 	},
+	{
+		name:"Library",
+		hurryCostModifier:25,
+		maintenance:1,
+		uniques:["+1 Science Per 2 Population"],
+		requiredTech:"Writing"
+	},
 	{
 		name:"The Great Library",
 		science:3,
@@ -52,13 +59,6 @@
 		freeTechs:1,
 		requiredTech:"Writing"
 	},
-	{
-		name:"Library",
-		hurryCostModifier:25,
-		maintenance:1,
-		uniques:["+1 Science Per 2 Population"],
-		requiredTech:"Writing"
-	},
 	{
 		name:"Paper Maker",
 		replaces:"Library",
@@ -234,6 +234,16 @@
 		uniques:["40% of food is carried over after a new citizen is born"]
 		requiredTech:"Engineering"
 	},
+	{
+		name:"Great Wall",
+		culture:1,
+		greatPersonPoints:{production:1},
+		isWonder:true,
+		providesFreeBuilding: "Walls",
+		freeTechs:1,
+		uniques:["Enemy land units must spend 1 extra movement point when inside your territory (obsolete upon Dynamite)"]
+		requiredTech:"Engineering"
+	},
 	
 	// Medieval Era
 	

core/src/com/unciv/logic/civilization/CivilizationInfo.kt

@@ -47,6 +47,9 @@ class CivilizationInfo {
     @Transient var viewableTiles = HashSet<TileInfo>()
     @Transient var viewableInvisibleUnitsTiles = HashSet<TileInfo>()
 
+    // This is for performance since every movement calculation depends on this, see MapUnit comment
+    @Transient var hasActiveGreatWall = false
+
     var gold = 0
     var happiness = 15
     @Deprecated("As of 2.11.1") var difficulty = "Chieftain"
@@ -351,6 +354,12 @@ class CivilizationInfo {
         }
         setCitiesConnectedToCapitalTransients()
         updateViewableTiles()
+        updateHasActiveGreatWall()
+    }
+
+    fun updateHasActiveGreatWall(){
+        hasActiveGreatWall = !tech.isResearched("Dynamite") &&
+                getBuildingUniques().contains("Enemy land units must spend 1 extra movement point when inside your territory (obsolete upon Dynamite)")
     }
 
     fun startTurn(){
@@ -402,6 +411,7 @@ class CivilizationInfo {
         goldenAges.endTurn(happiness)
         getCivUnits().forEach { it.endTurn() }
         diplomacy.values.forEach{it.nextTurn()}
+        updateHasActiveGreatWall()
     }
 
     fun getGreatPersonPointsForNextTurn(): Stats {

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

@@ -1,10 +1,19 @@
 package com.unciv.logic.map
 
 import com.badlogic.gdx.math.Vector2
+import com.unciv.logic.civilization.CivilizationInfo
 
 class UnitMovementAlgorithms(val unit:MapUnit) {
     val tileMap = unit.getTile().tileMap
 
+    private fun getMovementCostBetweenAdjacentTiles(from: TileInfo, to: TileInfo, civInfo: CivilizationInfo): Float {
+        var cost = getMovementCostBetweenAdjacentTiles(from,to)
+
+        val toOwner = to.getOwner()
+        if(toOwner!=null && civInfo.isAtWarWith(toOwner) && toOwner.hasActiveGreatWall) cost += 1
+        return cost
+    }
+
     private fun getMovementCostBetweenAdjacentTiles(from: TileInfo, to: TileInfo): Float {
 
         if(unit.type.isLandUnit() && (from.isLand() != to.isLand()))
@@ -50,7 +59,7 @@ class UnitMovementAlgorithms(val unit:MapUnit) {
                     // cities and units goes kaput.
 
                     else {
-                        val distanceBetweenTiles = getMovementCostBetweenAdjacentTiles(tileToCheck, neighbor)
+                        val distanceBetweenTiles = getMovementCostBetweenAdjacentTiles(tileToCheck, neighbor, unit.civInfo)
                         totalDistanceToTile = distanceToTiles[tileToCheck]!! + distanceBetweenTiles
                     }
 
@@ -169,12 +178,12 @@ class UnitMovementAlgorithms(val unit:MapUnit) {
             reversedList.add(currentTile)
             val distanceToCurrentTile = distanceToTiles[currentTile]!!
             if(currentUnitTile in currentTile.neighbors
-                    && getMovementCostBetweenAdjacentTiles(currentUnitTile,currentTile) == distanceToCurrentTile)
+                    && getMovementCostBetweenAdjacentTiles(currentUnitTile,currentTile,unit.civInfo) == distanceToCurrentTile)
                 return reversedList.reversed()
 
             for(tile in currentTile.neighbors)
                 currentTile = currentTile.neighbors.first{it in distanceToTiles
-                    && getMovementCostBetweenAdjacentTiles(it,currentTile) == distanceToCurrentTile - distanceToTiles[it]!!}
+                    && getMovementCostBetweenAdjacentTiles(it,currentTile,unit.civInfo) == distanceToCurrentTile - distanceToTiles[it]!!}
         }
         throw Exception("We couldn't get the path between the two tiles")
     }

core/src/com/unciv/models/gamebasics/Building.kt

@@ -265,6 +265,8 @@ class Building : NamedStats(), IConstruction{
                     city.population.autoAssignPopulation()
                 }
             }
+            "Enemy land units must spend 1 extra movement point when inside your territory (obsolete upon Dynamite)" in uniques ->
+                civInfo.updateHasActiveGreatWall()
         }
 
         if (freeTechs != 0) civInfo.tech.freeTechs += freeTechs