World wrap Part 2 (#3609)

* Changed map generation for hex maps

* Adding WorldWrap UI

* Is now compileable again

* Changed map gen for rec maps

well that was easy

* Units can now move and see across wrap

* well this is smarter

* World wrap checkbox commented ou

should be available only after everything has been merged

* simplify WW gen conditions

* reduced indentation

* Refactoring for better readablity

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

@@ -122,7 +122,7 @@ object HexMath {
         return cubic2HexCoords(roundCubicCoords(hex2CubicCoords(hexCoord)))
     }
 
-    fun getVectorsAtDistance(origin: Vector2, distance: Int): List<Vector2> {
+    fun getVectorsAtDistance(origin: Vector2, distance: Int, maxDistance: Int, worldWrap: Boolean): List<Vector2> {
         val vectors = mutableListOf<Vector2>()
         if (distance == 0) {
             vectors += origin.cpy()
@@ -136,21 +136,23 @@ object HexMath {
         }
         for (i in 0 until distance) { // 8 to 10
             vectors += current.cpy()
-            vectors += origin.cpy().scl(2f).sub(current) // Get vector on other side of clock
+            if (!worldWrap || distance != maxDistance)
+                vectors += origin.cpy().scl(2f).sub(current) // Get vector on other side of clock
             current.add(1f, 1f)
         }
         for (i in 0 until distance) { // 10 to 12
             vectors += current.cpy()
-            vectors += origin.cpy().scl(2f).sub(current) // Get vector on other side of clock
+            if (!worldWrap || distance != maxDistance ||  i != 0)
+                vectors += origin.cpy().scl(2f).sub(current) // Get vector on other side of clock
             current.add(0f, 1f)
         }
         return vectors
     }
 
-    fun getVectorsInDistance(origin: Vector2, distance: Int): List<Vector2> {
+    fun getVectorsInDistance(origin: Vector2, distance: Int, worldWrap: Boolean): List<Vector2> {
         val hexesToReturn = mutableListOf<Vector2>()
         for (i in 0 .. distance) {
-            hexesToReturn += getVectorsAtDistance(origin, i)
+            hexesToReturn += getVectorsAtDistance(origin, i, distance, worldWrap)
         }
         return hexesToReturn
     }

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

@@ -36,6 +36,7 @@ class MapParameters {
     var size: MapSize = MapSize.Medium
     var noRuins = false
     var noNaturalWonders = false
+    var worldWrap = false
 
     /** This is used mainly for the map editor, so you can continue editing a map under the ame ruleset you started with */
     var mods = LinkedHashSet<String>()

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

@@ -407,16 +407,15 @@ open class TileInfo {
     /** The two tiles have a river between them */
     fun isConnectedByRiver(otherTile: TileInfo): Boolean {
         if (otherTile == this) throw Exception("Should not be called to compare to self!")
-        val xDifference = this.position.x - otherTile.position.x
-        val yDifference = this.position.y - otherTile.position.y
 
-        return when {
-            yDifference < -1f || xDifference < -1f || yDifference > 1f || xDifference > 1f ->
-                throw Exception("Should never call this function on a non-neighbor!")
-            xDifference == 1f && yDifference == 1f -> hasBottomRiver // we're directly above it
-            xDifference == 1f -> hasBottomRightRiver // we're to the top-left of it
-            yDifference == 1f -> hasBottomLeftRiver // we're to the top-right of it
-            else -> otherTile.isConnectedByRiver(this) // we're below it, check the other tile
+        return when (tileMap.getNeighborTileClockPosition(this, otherTile)) {
+            2 -> otherTile.hasBottomLeftRiver // we're to the bottom-left of it
+            4 -> hasBottomRightRiver // we're to the top-right of it
+            6 -> hasBottomRiver // we're directly above it
+            8 -> hasBottomLeftRiver // we're to the top-left of it
+            10 -> otherTile.hasBottomRightRiver // we're to the bottom-right of it
+            12 -> otherTile.hasBottomRiver // we're directly below it
+            else -> throw Exception("Should never call this function on a non-neighbor!")
         }
     }
 

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

@@ -44,15 +44,16 @@ class TileMap {
     constructor()
 
     /** generates an hexagonal map of given radius */
-    constructor(radius: Int, ruleset: Ruleset) {
-        for (vector in HexMath.getVectorsInDistance(Vector2.Zero, radius))
+    constructor(radius: Int, ruleset: Ruleset, worldWrap: Boolean = false) {
+        for (vector in HexMath.getVectorsInDistance(Vector2.Zero, radius, worldWrap))
             tileList.add(TileInfo().apply { position = vector; baseTerrain = Constants.grassland })
         setTransients(ruleset)
     }
 
     /** generates a rectangular map of given width and height*/
-    constructor(width: Int, height: Int, ruleset: Ruleset) {
-        for (x in -width / 2..width / 2)
+    constructor(width: Int, height: Int, ruleset: Ruleset, worldWrap: Boolean = false) {
+        val halfway = if(worldWrap) width/2-1 else width/2
+        for (x in -width / 2 .. halfway)
             for (y in -height / 2..height / 2)
                 tileList.add(TileInfo().apply {
                     position = HexMath.evenQ2HexCoords(Vector2(x.toFloat(), y.toFloat()))
@@ -99,8 +100,6 @@ class TileMap {
                 sequenceOf(get(origin))
             else
                 sequence {
-                    fun getIfTileExistsOrNull(x: Int, y: Int) = if (contains(x, y)) get(x, y) else null
-
                     val centerX = origin.x.toInt()
                     val centerY = origin.y.toInt()
 
@@ -129,6 +128,30 @@ class TileMap {
                     }
                 }.filterNotNull()
 
+    private fun getIfTileExistsOrNull(x: Int, y: Int) : TileInfo? {
+        if (contains(x, y))
+            return get(x, y)
+
+        if (!mapParameters.worldWrap)
+            return null
+
+        var radius = mapParameters.size.radius
+        if (mapParameters.shape == MapShape.rectangular)
+            radius = HexMath.getEquivalentRectangularSize(radius).x.toInt() / 2
+
+        //tile is outside of the map
+        if (contains(x + radius, y - radius)) { //tile is on right side
+            //get tile wrapped around from right to left
+            return get(x + radius, y - radius)
+        } else if (contains(x - radius, y + radius)) { //tile is on left side
+            //get tile wrapped around from left to right
+            return get(x - radius, y + radius)
+        }
+
+        return null
+    }
+
+
     /** Tries to place the [unitName] into the [TileInfo] closest to the given the [position]
      * @param civInfo civilization to assign unit to
      * @return created [MapUnit] or null if no suitable location was found
@@ -141,7 +164,7 @@ class TileMap {
         val unit = gameInfo.ruleSet.units[unitName]!!.getMapUnit(gameInfo.ruleSet)
 
         fun getPassableNeighbours(tileInfo: TileInfo): Set<TileInfo> =
-                getTilesAtDistance(tileInfo.position, 1).filter { unit.movement.canPassThrough(it) }.toSet()
+                tileInfo.neighbors.filter { unit.movement.canPassThrough(it) }.toSet()
 
         // both the civ name and actual civ need to be in here in order to calculate the canMoveTo...Darn
         unit.assignOwner(civInfo, false)
@@ -293,4 +316,31 @@ class TileMap {
             tileInfo.setUnitTransients(setUnitCivTransients)
         }
     }
+
+    /**
+     * Returns the clockPosition of otherTile seen from tile's position
+     * Returns -1 if not neighbors
+     */
+    fun getNeighborTileClockPosition(tile: TileInfo, otherTile: TileInfo): Int{
+        var radius = mapParameters.size.radius
+        if (mapParameters.shape == MapShape.rectangular)
+            radius = HexMath.getEquivalentRectangularSize(radius).x.toInt() / 2
+
+        val xDifference = tile.position.x - otherTile.position.x
+        val yDifference = tile.position.y - otherTile.position.y
+        val xWrapDifferenceBottom = tile.position.x - (otherTile.position.x - radius)
+        val yWrapDifferenceBottom = tile.position.y - (otherTile.position.y - radius)
+        val xWrapDifferenceTop = tile.position.x - (otherTile.position.x + radius)
+        val yWrapDifferenceTop = tile.position.y - (otherTile.position.y + radius)
+
+        return when {
+            xDifference == 1f && yDifference == 1f -> 6 // otherTile is below
+            xDifference == -1f && yDifference == -1f -> 12 // otherTile is above
+            xDifference == 1f || xWrapDifferenceBottom == 1f -> 4 // otherTile is bottom-right
+            yDifference == 1f || yWrapDifferenceBottom == 1f -> 8 // otherTile is bottom-left
+            xDifference == -1f || xWrapDifferenceTop == -1f -> 10 // otherTile is top-left
+            yDifference == -1f || yWrapDifferenceTop == -1f -> 2 // otherTile is top-right
+            else -> -1
+        }
+    }
 }

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

@@ -27,10 +27,10 @@ class MapGenerator(val ruleset: Ruleset) {
 
         if (mapParameters.shape == MapShape.rectangular) {
             val size = HexMath.getEquivalentRectangularSize(mapRadius)
-            map = TileMap(size.x.toInt(), size.y.toInt(), ruleset)
+            map = TileMap(size.x.toInt(), size.y.toInt(), ruleset, mapParameters.worldWrap)
         }
         else
-            map = TileMap(mapRadius, ruleset)
+            map = TileMap(mapRadius, ruleset, mapParameters.worldWrap)
 
         map.mapParameters = mapParameters
         map.mapParameters.seed = seed

core/src/com/unciv/ui/newgamescreen/MapParametersTable.kt

@@ -21,6 +21,7 @@ class MapParametersTable(val mapParameters: MapParameters, val isEmptyMapAllowed
     lateinit var mapTypeSelectBox: TranslatedSelectBox
     lateinit var noRuinsCheckbox: CheckBox
     lateinit var noNaturalWondersCheckbox: CheckBox
+    lateinit var worldWrapCheckbox: CheckBox
 
     init {
         skin = CameraStageBaseScreen.skin
@@ -30,6 +31,8 @@ class MapParametersTable(val mapParameters: MapParameters, val isEmptyMapAllowed
         addWorldSizeSelectBox()
         addNoRuinsCheckbox()
         addNoNaturalWondersCheckbox()
+        //uncomment when whole worldWrap feature is added
+        //addWorldWrapCheckbox()
         addAdvancedSettings()
     }
 
@@ -105,6 +108,15 @@ class MapParametersTable(val mapParameters: MapParameters, val isEmptyMapAllowed
         add(noNaturalWondersCheckbox).colspan(2).row()
     }
 
+    private fun addWorldWrapCheckbox() {
+        worldWrapCheckbox = CheckBox("World Wrap".tr(), skin)
+        worldWrapCheckbox.isChecked = mapParameters.worldWrap
+        worldWrapCheckbox.onChange {
+            mapParameters.worldWrap = worldWrapCheckbox.isChecked
+        }
+        add(worldWrapCheckbox).colspan(2).row()
+    }
+
     private fun addAdvancedSettings() {
 
         val advancedSettingsTable = getAdvancedSettingsTable()

core/src/com/unciv/ui/worldscreen/WorldMapHolder.kt

@@ -45,6 +45,7 @@ class WorldMapHolder(internal val worldScreen: WorldScreen, internal val tileMap
 
     init {
         if (Gdx.app.type == Application.ApplicationType.Desktop) this.setFlingTime(0f)
+        continousScrollingX = tileMap.mapParameters.worldWrap
     }
 
     // Used to transfer data on the "move here" button that should be created, from the side thread to the main thread