fixed some power related things in hologram projector

src/main/java/li/cil/oc/client/PacketHandler.scala

@@ -27,6 +27,7 @@ class PacketHandler extends CommonPacketHandler {
       case PacketType.ComputerState => onComputerState(p)
       case PacketType.ComputerUserList => onComputerUserList(p)
       case PacketType.HologramClear => onHologramClear(p)
+      case PacketType.HologramPowerChange => onHologramPowerChange(p)
       case PacketType.HologramScale => onHologramScale(p)
       case PacketType.HologramSet => onHologramSet(p)
       case PacketType.PowerState => onPowerState(p)
@@ -111,6 +112,12 @@ class PacketHandler extends CommonPacketHandler {
       case _ => // Invalid packet.
     }
 
+  def onHologramPowerChange(p: PacketParser) =
+    p.readTileEntity[Hologram]() match {
+      case Some(t) => t.hasPower = p.readBoolean()
+      case _ => // Invalid packet.
+    }
+
   def onHologramScale(p: PacketParser) =
     p.readTileEntity[Hologram]() match {
       case Some(t) =>

src/main/java/li/cil/oc/common/PacketType.scala

@@ -9,6 +9,7 @@ object PacketType extends Enumeration {
   ComputerState,
   ComputerUserList,
   HologramClear,
+  HologramPowerChange,
   HologramScale,
   HologramSet,
   PowerState,

src/main/java/li/cil/oc/common/tileentity/Hologram.scala

@@ -128,15 +128,22 @@ class Hologram extends Environment with SidedEnvironment {
           resetDirtyFlag()
         }
       }
-      if (litRatio < 0) {
-        litRatio = 0
-        for (i <- 0 until volume.length) {
-          if (volume(i) != 0) litRatio += 1
+      if (world.getWorldTime % Settings.get.tickFrequency == 0) {
+        if (litRatio < 0) {
+          litRatio = 0
+          for (i <- 0 until volume.length) {
+            if (volume(i) != 0) litRatio += 1
+          }
+          litRatio /= volume.length
         }
-        litRatio /= volume.length
-      }
 
-      hasPower = node.changeBuffer(-Settings.get.hologramCost * litRatio * scale) == 0
+        val hadPower = hasPower
+        val neededPower = Settings.get.hologramCost * litRatio * scale * Settings.get.tickFrequency
+        hasPower = node.tryChangeBuffer(-neededPower)
+        if (hasPower != hadPower) {
+          ServerPacketSender.sendHologramPowerChange(this)
+        }
+      }
     }
   }
 
@@ -165,6 +172,7 @@ class Hologram extends Environment with SidedEnvironment {
     super.readFromNBTForClient(nbt)
     nbt.getIntArray("volume").copyToArray(volume)
     scale = nbt.getDouble("scale")
+    hasPower = nbt.getBoolean("hasPower")
     dirty = true
   }
 
@@ -172,5 +180,6 @@ class Hologram extends Environment with SidedEnvironment {
     super.writeToNBTForClient(nbt)
     nbt.setIntArray("volume", volume)
     nbt.setDouble("scale", scale)
+    nbt.setBoolean("hasPower", hasPower)
   }
 }

src/main/java/li/cil/oc/server/PacketSender.scala

@@ -62,6 +62,15 @@ object PacketSender {
     pb.sendToNearbyPlayers(t)
   }
 
+  def sendHologramPowerChange(t: Hologram) {
+    val pb = new PacketBuilder(PacketType.HologramPowerChange)
+
+    pb.writeTileEntity(t)
+    pb.writeBoolean(t.hasPower)
+
+    pb.sendToNearbyPlayers(t)
+  }
+
   def sendHologramScale(t: Hologram) {
     val pb = new PacketBuilder(PacketType.HologramScale)