why ghost item latch is always false when read?? fixed using atomic vars

src/net/torvald/terrarum/modulebasegame/gameitems/FixtureItemBase.kt

@@ -3,6 +3,7 @@ package net.torvald.terrarum.modulebasegame.gameitems
 import com.badlogic.gdx.graphics.Texture
 import com.badlogic.gdx.graphics.g2d.TextureRegion
 import net.torvald.terrarum.*
+import net.torvald.terrarum.App.printdbg
 import net.torvald.terrarum.gameactors.ActorWithBody
 import net.torvald.terrarum.gameitems.GameItem
 import net.torvald.terrarum.gameitems.ItemID
@@ -12,16 +13,18 @@ import net.torvald.terrarum.modulebasegame.TerrarumIngame
 import net.torvald.terrarum.modulebasegame.gameactors.FixtureBase
 import net.torvald.terrarum.utils.RandomWordsName
 import net.torvald.terrarumsansbitmap.gdx.TextureRegionPack
+import java.util.concurrent.atomic.AtomicBoolean
+import java.util.concurrent.atomic.AtomicReference
 
 /**
  * Created by minjaesong on 2021-12-13.
  */
 open class FixtureItemBase(originalID: ItemID, val fixtureClassName: String) : GameItem(originalID) {
 
-    private val hash = RandomWordsName(4)
+//    @Transient private val hash = RandomWordsName(4)
 
 
-    protected open val makeFixture: () -> FixtureBase = {
+    @Transient protected open val makeFixture: () -> FixtureBase = {
         Class.forName(fixtureClassName).getDeclaredConstructor().newInstance() as FixtureBase
     }
 
@@ -29,11 +32,11 @@ open class FixtureItemBase(originalID: ItemID, val fixtureClassName: String) : G
         ItemCodex.fixtureToSpawnerItemID[fixtureClassName] = originalID
 
 
-        println("FixtureItemBase init: $hash")
+//        println("FixtureItemBase init: $hash")
     }
 
 //    private var _ghostItem: FixtureBase? = null
-    private var ghostItem: FixtureBase? = null
+    @Transient private var ghostItem = AtomicReference<FixtureBase>()
 
     override var dynamicID: ItemID = originalID
     override val originalName = "FIXTUREBASE"
@@ -54,17 +57,18 @@ open class FixtureItemBase(originalID: ItemID, val fixtureClassName: String) : G
 
     override var baseToolSize: Double? = baseMass
 
-    private var ghostInit = false
-    
+    @Transient private var ghostInit = AtomicBoolean(false)
+
     override fun effectWhileEquipped(actor: ActorWithBody, delta: Float) {
-        println("ghost: ${ghostItem}; ghostInit = $ghostInit; instance: $hash")
-        if (!ghostInit) {
-            ghostInit = true
-            ghostItem = makeFixture()
+//        println("ghost: ${ghostItem}; ghostInit = $ghostInit; instance: $hash")
+        if (!ghostInit.get()) {
+            ghostItem.getAndSet(makeFixture())
+            ghostInit.getAndSet(true)
+//            printdbg(this, "ghost item initialised: $ghostItem")
         }
 
         (INGAME as TerrarumIngame).blockMarkingActor.let {
-            it.setGhost(ghostItem!!)
+            it.setGhost(ghostItem.get())
             it.isVisible = true
             it.update(delta)
             it.setGhostColourBlock()
@@ -83,7 +87,7 @@ open class FixtureItemBase(originalID: ItemID, val fixtureClassName: String) : G
     }
 
     override fun startPrimaryUse(actor: ActorWithBody, delta: Float) = mouseInInteractableRange(actor) {
-        val item = ghostItem!!//makeFixture()
+        val item = ghostItem.get()//makeFixture()
 
         item.spawn(Terrarum.mouseTileX, Terrarum.mouseTileY - item.blockBox.height + 1)
         // return true when placed, false when cannot be placed

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

@@ -345,7 +345,6 @@ class UIItemTextLineInput(
                                 textbuf.addAll(cursorX, codepoints)
                                 cursorX += codepoints.size
                                 currentTextLenPx = App.fontGame.getWidth(CodepointSequence(textbuf.subList(0, cursorX)))
-                                println("cursorX now: $cursorX; w: $currentTextLenPx; wOld: $oldTextLenPx")
                                 moveCursorForward(currentTextLenPx - oldTextLenPx)
                                 oldTextLenPx = currentTextLenPx
                             }