fix: jittery cam on titlescreen

src/net/torvald/terrarum/modulebasegame/BuildingMaker.kt

@@ -359,9 +359,6 @@ class BuildingMaker(batch: FlippingSpriteBatch) : IngameInstance(batch) {
         mouseOnUI = (overwriteMouseOnUI || uiPenMenu.isVisible /*|| uiPalette.isVisible*/ || uiGetPoiName.isVisible)
 
 
-        WorldCamera.update(world, actorNowPlaying)
-
-
         // make pen work HERE
         // when LEFT mouse is down
         if (!tappedOnUI && Terrarum.mouseDown && !mouseOnUI) {
@@ -457,6 +454,8 @@ class BuildingMaker(batch: FlippingSpriteBatch) : IngameInstance(batch) {
     private val renderGame = { delta: Float ->
         _testMarkerDrawCalls = 0L
 
+        WorldCamera.update(world, actorNowPlaying)
+
         IngameRenderer.invoke(delta, false,
             screenZoom,
             listOf(),

src/net/torvald/terrarum/modulebasegame/TitleScreen.kt

@@ -328,9 +328,6 @@ class TitleScreen(batch: FlippingSpriteBatch) : IngameInstance(batch) {
         WeatherMixer.update(delta, cameraPlayer, demoWorld)
         cameraPlayer.update(delta)
 
-        // worldcamera update AFTER cameraplayer in this case; the other way is just an exception for actual ingame SFX
-        WorldCamera.update(demoWorld, cameraPlayer)
-
         // update UIs //
         uiContainer.forEach { it?.update(delta) }
 
@@ -369,6 +366,8 @@ class TitleScreen(batch: FlippingSpriteBatch) : IngameInstance(batch) {
 
 
         if (!demoWorld.layerTerrain.ptr.destroyed) { // FIXME q&d hack to circumvent the dangling pointer issue #26
+            WorldCamera.update(demoWorld, cameraPlayer)
+
             IngameRenderer.invoke(
                 delta,
                 false,

src/net/torvald/terrarum/worlddrawer/BlocksDrawer.kt

@@ -1176,7 +1176,11 @@ internal object BlocksDrawer {
     private val occlusionIntensity = 0.25f // too low value and dark-coloured walls won't darken enough
 
     private val doTilemapUpdate: Boolean
-        get() = (!world.layerTerrain.ptrDestroyed && App.GLOBAL_RENDER_TIMER % 3 == 0L)
+        get() {
+            // TODO adaptive rate control via cam delta
+            val rate = 4
+            return (!world.layerTerrain.ptrDestroyed && App.GLOBAL_RENDER_TIMER % rate == 0L)
+        }
 
     private var camTransX = 0
     private var camTransY = 0

src/net/torvald/terrarum/worlddrawer/WorldCamera.kt

@@ -79,6 +79,9 @@ object WorldCamera {
     inline val camVector: com.badlogic.gdx.math.Vector2
         get() = com.badlogic.gdx.math.Vector2(gdxCamX, gdxCamY)
 
+    /**
+     * Must be called on RENDER, not UPDATE, before the IngameRenderer invocation.
+     */
     fun update(world: GameWorld, player: ActorWithBody?) {
         if (player == null) return