changes in fade-slide transition container

src/net/torvald/terrarum/modulebasegame/ui/UIInventoryFull.kt

@@ -220,7 +220,9 @@ class UIInventoryFull(
         width,
         App.scr.height,
         1f,
-            transitionalCraftingUI, transitionalItemCells, transitionalEscMenu
+        listOf(transitionalCraftingUI),
+        listOf(transitionalItemCells),
+        listOf(transitionalEscMenu)
     )
 
 

src/net/torvald/terrarum/modulebasegame/ui/UILoadSavegame.kt

@@ -176,17 +176,12 @@ class UILoadSavegame(val remoCon: UIRemoCon) : Advanceable() {
         width,
         App.scr.height,
         0f,
-        transitionalListing, transitionalManage
+        listOf(transitionalListing),
+        listOf(transitionalManage, transitionalAutosave, transitionalNewCharacter)
     )
 
     init {
-        listOf(transitionalAutosave, transitionalManage, transitionalNewCharacter).forEach {
+
-            it.posX = (-width / 2f).roundToInt()
-            it.initialX = (-width / 2f).roundToInt()
-            it.posY = 0
-            it.initialY = 0
-            it.opacity = 0f
-        }
     }
 
     private fun getDrawTextualInfoFun(disks: DiskPair): (UIItem, SpriteBatch) -> Unit {

src/net/torvald/terrarum/modulebasegame/ui/UIWorldPortal.kt

@@ -64,7 +64,9 @@ class UIWorldPortal : UICanvas(
         width,
         App.scr.height,
         0f,
-         transitionalListing, transitionalSearch
+         listOf(transitionalListing),
+        listOf(),
+        listOf()
     )
 
     /**

src/net/torvald/terrarum/ui/UIItemHorizontalFadeSlide.kt

@@ -2,10 +2,15 @@ package net.torvald.terrarum.ui
 
 import com.jme3.math.FastMath
 import net.torvald.terrarum.INGAME
+import net.torvald.terrarum.modulebasegame.ui.NullUI
 import kotlin.math.absoluteValue
 import kotlin.math.roundToInt
 
 /**
+ * Three virtual slide panels for horizontal sliding transition.
+ *
+ * The left/centre/right designation is arbitrary: you can have "left" as a centre (main) and the "centre" as a right (aux)
+ *
  * @param width size of the canvas where transition occurs
  * @param height size of the canvas where transition occurs
  */
@@ -17,27 +22,58 @@ class UIItemHorizontalFadeSlide(
     height: Int,
         //transitionLength: Float,
     currentPosition: Float,
-        vararg uis: UICanvas
+    private val uisOnLeft: List<UICanvas>,
-) : UIItemTransitionContainer(parent, initialX, initialY, width, height, 0.12f, currentPosition, uis) {
+    private val uisOnCentre: List<UICanvas>,
+    private val uisOnRight: List<UICanvas> = emptyList(),
+) : UIItemTransitionContainer(parent, initialX, initialY, width, height, 0.12f, currentPosition, emptyList()) {
 
-    fun getOffX(index: Int) = ((currentPosition - index) * width / 2f).roundToInt()
+    fun getOffX(index: Int) = -((currentPosition - index) * width / 2f).roundToInt()
     fun getOpacity(index: Int) = 1f - (currentPosition - index).absoluteValue.coerceIn(0f, 1f)
 
+    private var leftUI: UICanvas = uisOnLeft.firstOrNull() ?: NullUI
+    private var centreUI: UICanvas = uisOnCentre.firstOrNull() ?: NullUI
+    private var rightUI: UICanvas = uisOnRight.firstOrNull() ?: NullUI
+
+    override val uis: List<UICanvas>; get() = listOf(leftUI, centreUI, rightUI)
+
+    fun setLeftUI(index: Int) {
+        leftUI = uisOnLeft[index]
+    }
+    fun setCentreUI(index: Int) {
+        centreUI = uisOnCentre[index]
+    }
+    fun setRightUI(index: Int) {
+        rightUI = uisOnRight[index]
+    }
 
     init {
         // re-position the uis according to the initial choice of currentPosition
-        uis.forEachIndexed { index, it ->
+        uisOnLeft.forEachIndexed { index, it ->
-            it.posX = 0 + getOffX(index)
+            it.posX = getOffX(0)
-            it.initialX = 0 + getOffX(index)
+            it.initialX = getOffX(0)
             it.posY = 0
             it.initialY = 0
-            it.opacity = getOpacity(index)
+            it.opacity = getOpacity(0)
+        }
+        uisOnCentre.forEachIndexed { index, it ->
+            it.posX = getOffX(1)
+            it.initialX = getOffX(1)
+            it.posY = 0
+            it.initialY = 0
+            it.opacity = getOpacity(1)
+        }
+        uisOnRight.forEachIndexed { index, it ->
+            it.posX = getOffX(2)
+            it.initialX = getOffX(2)
+            it.posY = 0
+            it.initialY = 0
+            it.opacity = getOpacity(2)
         }
     }
 
-    override fun onTransition(currentPosition: Float, uis: Array<out UICanvas>) {
+    override fun onTransition(currentPosition: Float, uis: List<UICanvas>) {
         uis.forEachIndexed { index, it ->
-            it.posX = -getOffX(index)
+            it.posX = getOffX(index)
             it.posY = it.initialY
             it.opacity = getOpacity(index)
         }

src/net/torvald/terrarum/ui/UIItemTransitionContainer.kt

@@ -15,7 +15,7 @@ open class UIItemTransitionContainer(
     override val height: Int,
     val transitionLength: Float = 0.15f,
     var currentPosition: Float = 0f,
-        val uis: Array<out UICanvas>
+    open val uis: List<UICanvas>
 ) : UIItem(parent, initialX, initialY) {
 
     val debugvals = false
@@ -51,7 +51,7 @@ open class UIItemTransitionContainer(
         uis.forEachIndexed { index, ui -> if (timeToUpdate(index)) ui.update(delta) }
     }
 
-    open fun onTransition(currentPosition: Float, uis: Array<out UICanvas>) {}
+    open fun onTransition(currentPosition: Float, uis: List<UICanvas>) {}
 
     override fun render(batch: SpriteBatch, camera: Camera) {
         super.render(batch, camera)