wire pieces will be 'lit' when it receives power (power propagation not implemented)

assets/mods/basegame/wires/wires.csv

@@ -2,11 +2,14 @@
 "8192";"8192";"WIRE_RED";"signal";"digital_bit";"3";"N/A";"N/A";"net.torvald.terrarum.modulebasegame.gameitems.WirePieceSignalWire";"basegame.items16,1,9"
 "8193";"8193";"WIRE_GREEN";"signal";"digital_bit";"3";"N/A";"N/A";"net.torvald.terrarum.modulebasegame.gameitems.WirePieceSignalWire";"basegame.items16,1,10"
 "8194";"8194";"WIRE_BLUE";"signal";"digital_bit";"3";"N/A";"N/A";"net.torvald.terrarum.modulebasegame.gameitems.WirePieceSignalWire";"basegame.items16,1,11"
-"8195";"8195";"WIRE_BUNDLE";"signal";"digital_3bits";"3";"N/A";"N/A";"net.torvald.terrarum.modulebasegame.gameitems.WirePieceSignalWire";"basegame.items16,1,2"
-#"bundlemaker";"bundlemaker";"WIRE_BUNDLEMAKER";"signal";"digital_bit";3;"digital_bit";"digital_3bits";"net.torvald.terrarum.modulebasegame.gameitems.WirePieceSignalWire";"basegame.items16,1,9"
+#"8195";"8195";"WIRE_BUNDLE";"signal";"digital_3bits";"3";"N/A";"N/A";"net.torvald.terrarum.modulebasegame.gameitems.WirePieceSignalWire";"basegame.items16,1,2"
 
 
 # accept: which wiretype (defined elsewhere) the wires acceps. Use comma to separate multiple. N/A for electronic components (aka "not wires")
 # inputcount: how many sides are input (outputcount is deduced from the inputcount). N/A for wires
 # inputtype: which wiretype it accepts. N/A for wires
 # outputtype: which wiretype it emits. N/A for wires
+#
+# comments
+# "digital_3bits" must come right after three wires it bundles
+# what's the point of WIRE_BUNDLE when you can overlap as many wires as you want? -- Torvald, 2021-08-09

src/net/torvald/terrarum/blockproperties/BlockCodex.kt

@@ -156,6 +156,7 @@ object BlockCodex {
         prop.nameKey = record.get("name")
 
         prop.id = "$modname:$key"
+        prop.numericID = key
         prop.drop = "$modname:${intVal(record, "drop")}"
 
         prop.shadeColR = floatVal(record, "shdr")

src/net/torvald/terrarum/blockproperties/BlockProp.kt

@@ -12,6 +12,7 @@ import net.torvald.terrarum.serialise.toLittle
 class BlockProp {
 
     var id: ItemID = ""
+    var numericID: Int = -1
 
     var nameKey: String = ""
 

src/net/torvald/terrarum/blockproperties/WireCodex.kt

@@ -104,6 +104,7 @@ object WireCodex {
         prop.nameKey = record.get("name")
 
         prop.id = "wire@$modname:$key"
+        prop.numericID = key
         prop.renderClass = record.get("renderclass")
         prop.accepts = record.get("accept")
         prop.inputCount = intVal(record, "inputcount")

src/net/torvald/terrarum/blockproperties/WireProp.kt

@@ -8,6 +8,7 @@ import net.torvald.terrarum.gameitem.ItemID
 class WireProp {
 
     var id: ItemID = ""
+    var numericID: Int = -1
     var nameKey: String = ""
 
     var renderClass: String = ""

src/net/torvald/terrarum/gameactors/WireActor.kt

@@ -1,14 +1,13 @@
 package net.torvald.terrarum.gameactors
 
 import com.badlogic.gdx.graphics.g2d.SpriteBatch
-import net.torvald.terrarum.AppLoader.printdbg
 import net.torvald.terrarum.BlendMode
 import net.torvald.terrarum.CommonResourcePool
 import net.torvald.terrarum.Point2i
-import net.torvald.terrarum.Terrarum
 import net.torvald.terrarum.TerrarumAppConfiguration.TILE_SIZE
+import net.torvald.terrarum.blockproperties.WireCodex
 import net.torvald.terrarum.gameitem.ItemID
-import net.torvald.terrarum.gameworld.GameWorld
+import net.torvald.terrarum.toInt
 
 /**
  * Created by minjaesong on 2021-07-30.
@@ -29,7 +28,7 @@ class WireActor(id: ActorID) : ActorWithBody(RenderOrder.WIRES, PhysProperties.I
         setHitboxDimension(2, 2, 0, 0)
     }
 
-    private var oldWireId = ""
+    private var wireID = ""
     private var worldX = 0
     private var worldY = 0
 
@@ -40,7 +39,7 @@ class WireActor(id: ActorID) : ActorWithBody(RenderOrder.WIRES, PhysProperties.I
     fun setWire(itemID: ItemID, worldX: Int, worldY: Int) {
         setHitboxDimension(TILE_SIZE, TILE_SIZE, 0, 0)
 
-        if (oldWireId != itemID) {
+        if (wireID != itemID) {
             if (sprite == null) {
                 makeNewSprite(CommonResourcePool.getAsTextureRegionPack(itemID))
                 sprite!!.delays = floatArrayOf(1f,1f)
@@ -48,7 +47,7 @@ class WireActor(id: ActorID) : ActorWithBody(RenderOrder.WIRES, PhysProperties.I
             }
             else sprite!!.setSpriteImage(CommonResourcePool.getAsTextureRegionPack(itemID))
 
-            oldWireId = itemID
+            wireID = itemID
         }
         this.worldX = worldX
         this.worldY = worldY
@@ -76,11 +75,24 @@ class WireActor(id: ActorID) : ActorWithBody(RenderOrder.WIRES, PhysProperties.I
     }
 
     override fun update(delta: Float) {
-
     }
 
     override fun drawBody(batch: SpriteBatch) {
         if (isVisible && sprite != null) {
+            if (WireCodex[wireID].accepts == "digital_3bits") {
+                // "digital_3bits" must come right after three wires it bundles
+                val rootID = wireID.substringBefore(':') + ":"
+                var row = 0
+                (WireCodex[wireID].numericID - 3 .. WireCodex[wireID].numericID - 1).forEachIndexed { index, it ->
+                    val itemID = rootID + it
+                    row = row or ((world?.getWireEmitStateOf(worldX, worldY, itemID)?.isNotZero == true).toInt() shl index)
+                }
+                sprite?.currentRow = row
+            }
+            else {
+                sprite?.currentRow = (world?.getWireEmitStateOf(worldX, worldY, wireID)?.isNotZero == true).toInt()
+            }
+
             BlendMode.resolve(drawMode, batch)
             drawSpriteInGoodPosition(sprite!!, batch)
         }

src/org/dyn4j/geometry/Vector2.kt

@@ -536,6 +536,13 @@ class Vector2 {
     val isZero: Boolean
         get() = Math.abs(this.x) <= Epsilon.E && Math.abs(this.y) <= Epsilon.E
 
+    /**
+     * Returns false if this [Vector2] is the zero [Vector2].
+     * @return boolean
+     */
+    val isNotZero: Boolean
+        get() = !isZero
+
     /**
      * Negates this [Vector2].
      * @return [Vector2] this vector