src/main/scala/li/cil/oc/common/tileentity/Hologram.scala - minecraft/opencomputers - Rivoreo Source Code Repositories

 package li.cil.oc.common.tileentity

 import cpw.mods.fml.relauncher.{Side, SideOnly}
 import li.cil.oc.api.network._
 import li.cil.oc.server.{PacketSender => ServerPacketSender}
 import li.cil.oc.{Settings, api}
 import net.minecraft.entity.player.EntityPlayer
 import net.minecraft.nbt.NBTTagCompound
 import net.minecraft.util.AxisAlignedBB
 import net.minecraftforge.common.util.ForgeDirection

 class Hologram(var tier: Int) extends traits.Environment with SidedEnvironment with Analyzable {
   def this() = this(0)

   val node = api.Network.newNode(this, Visibility.Network).
     withComponent("hologram").
     withConnector().
     create()

   val width = 3 * 16

   val height = 2 * 16 // 32 bit in an int

   // Layout is: first half is lower bit, second half is higher bit for the
   // voxels in the cube. This is to retain compatibility with pre 1.3 saves.
   val volume = new Array[Int](width * width * 2)

   // Render scale.
   var scale = 1.0

   // Relative number of lit columns (for energy cost).
   var litRatio = -1.0

   // Whether we need to send an update packet/recompile our display list.
   var dirty = false

   // Store it here for convenience, this is the number of visible voxel faces
   // as determined in the last VBO index update. See HologramRenderer.
   var visibleQuads = 0

   // Interval of dirty columns.
   var dirtyFromX = Int.MaxValue
   var dirtyUntilX = -1
   var dirtyFromZ = Int.MaxValue
   var dirtyUntilZ = -1

   // Time to wait before sending another update packet.
   var cooldown = 5

   var hasPower = true

   val colorsByTier = Array(Array(0x00FF00), Array(0x0000FF, 0x00FF00, 0xFF0000)) // 0xBBGGRR for rendering convenience

   // This is a def and not a val for loading (where the tier comes from the nbt and is always 0 here).
   def colors = colorsByTier(tier)

   def getColor(x: Int, y: Int, z: Int) = {
     val lbit = (volume(x + z * width) >>> y) & 1
     val hbit = (volume(x + z * width + width * width) >>> y) & 1
     lbit | (hbit << 1)
   }

   def setColor(x: Int, y: Int, z: Int, value: Int) {
     if ((value & 3) != getColor(x, y, z)) {
       val lbit = value & 1
       val hbit = (value >>> 1) & 1
       volume(x + z * width) = (volume(x + z * width) & ~(1 << y)) | (lbit << y)
       volume(x + z * width + width * width) = (volume(x + z * width + width * width) & ~(1 << y)) | (hbit << y)
       setDirty(x, z)
     }
   }

   private def setDirty(x: Int, z: Int) {
     dirty = true
     dirtyFromX = math.min(dirtyFromX, x)
     dirtyUntilX = math.max(dirtyUntilX, x + 1)
     dirtyFromZ = math.min(dirtyFromZ, z)
     dirtyUntilZ = math.max(dirtyUntilZ, z + 1)
     litRatio = -1
   }

   private def resetDirtyFlag() {
     dirty = false
     dirtyFromX = Int.MaxValue
     dirtyUntilX = -1
     dirtyFromZ = Int.MaxValue
     dirtyUntilZ = -1
     cooldown = 5
   }

   // ----------------------------------------------------------------------- //

   @SideOnly(Side.CLIENT)
   override def canConnect(side: ForgeDirection) = side == ForgeDirection.DOWN

   override def sidedNode(side: ForgeDirection) = if (side == ForgeDirection.DOWN) node else null

   // Override automatic analyzer implementation for sided environments.
   override def onAnalyze(player: EntityPlayer, side: Int, hitX: Float, hitY: Float, hitZ: Float) = Array(node)

   // ----------------------------------------------------------------------- //

   @Callback(doc = """function() -- Clears the hologram.""")
   def clear(computer: Context, args: Arguments): Array[AnyRef] = this.synchronized {
     for (i <- 0 until volume.length) volume(i) = 0
     ServerPacketSender.sendHologramClear(this)
     resetDirtyFlag()
     litRatio = 0
     null
   }

   @Callback(direct = true, doc = """function(x:number, y:number, z:number):number -- Returns the value for the specified voxel.""")
   def get(computer: Context, args: Arguments): Array[AnyRef] = this.synchronized {
     val (x, y, z) = checkCoordinates(args)
     result(getColor(x, y, z))
   }

   @Callback(direct = true, limit = 256, doc = """function(x:number, y:number, z:number, value:number or boolean) -- Set the value for the specified voxel.""")
   def set(computer: Context, args: Arguments): Array[AnyRef] = this.synchronized {
     val (x, y, z) = checkCoordinates(args)
     val value = checkColor(args, 3)
     setColor(x, y, z, value)
     null
   }

   @Callback(direct = true, limit = 128, doc = """function(x:number, z:number, height:number, value:number or boolean) -- Fills a column to the specified height.""")
   def fill(computer: Context, args: Arguments): Array[AnyRef] = this.synchronized {
     val (x, _, z) = checkCoordinates(args, 0, -1, 1)
     val height = math.min(32, math.max(0, args.checkInteger(2)))
     val value = checkColor(args, 3)

     val lbit = value & 1
     val hbit = (value >>> 1) & 1
     if (lbit == 0 || height == 0) volume(x + z * width) = 0
     else volume(x + z * width) = 0xFFFFFFFF >>> (32 - height)
     if (hbit == 0 || height == 0) volume(x + z * width + width * width) = 0
     else volume(x + z * width + width * width) = 0xFFFFFFFF >>> (32 - height)

     setDirty(x, z)
     null
   }

   @Callback(doc = """function(x:number, z:number, sx:number, sz:number, tx:number, tz:number) -- Copies an area of columns by the specified translation.""")
   def copy(computer: Context, args: Arguments): Array[AnyRef] = this.synchronized {
     val (x, _, z) = checkCoordinates(args, 0, -1, 1)
     val w = args.checkInteger(2)
     val h = args.checkInteger(3)
     val tx = args.checkInteger(4)
     val tz = args.checkInteger(5)

     // Anything to do at all?
     if (w <= 0 || h <= 0) return null
     if (tx == 0 && tz == 0) return null
     // Loop over the target rectangle, starting from the directions away from
     // the source rectangle and copy the data. This way we ensure we don't
     // overwrite anything we still need to copy.
     val (dx0, dx1) = (math.max(0, math.min(width - 1, x + tx + w - 1)), math.max(0, math.min(width, x + tx))) match {
       case dx if tx > 0 => dx
       case dx => dx.swap
     }
     val (dz0, dz1) = (math.max(0, math.min(width - 1, z + tz + h - 1)), math.max(0, math.min(width, z + tz))) match {
       case dz if tz > 0 => dz
       case dz => dz.swap
     }
     val (sx, sz) = (if (tx > 0) -1 else 1, if (tz > 0) -1 else 1)
     // Copy values to destination rectangle if there source is valid.
     for (nz <- dz0 to dz1 by sz) {
       nz - tz match {
         case oz if oz >= 0 && oz < width =>
           for (nx <- dx0 to dx1 by sx) {
             nx - tx match {
               case ox if ox >= 0 && ox < width =>
                 volume(nz * width + nx) = volume(oz * width + ox)
                 volume(nz * width + nx + width * width) = volume(oz * width + ox + width * width)
               case _ => /* Got no source column. */
             }
           }
         case _ => /* Got no source row. */
       }
     }

     // Mark target rectangle dirty.
     setDirty(math.min(dx0, dx1), math.min(dz0, dz1))
     setDirty(math.max(dx0, dx1), math.max(dz0, dz1))

     // The reasoning here is: it'd take 18 ticks to do the whole are with fills,
     // so make this slightly more efficient (15 ticks - 0.75 seconds). Make it
     // 'free' if it's less than 0.25 seconds, i.e. for small copies.
     val area = (math.max(dx0, dx1) - math.min(dx0, dx1)) * (math.max(dz0, dz1) - math.min(dz0, dz1))
     val relativeArea = math.max(0, area / (width * width).toFloat - 0.25)
     computer.pause(relativeArea)

     null
   }

   @Callback(doc = """function():number -- Returns the render scale of the hologram.""")
   def getScale(computer: Context, args: Arguments): Array[AnyRef] = {
     result(scale)
   }

   @Callback(doc = """function(value:number) -- Set the render scale. A larger scale consumes more energy.""")
   def setScale(computer: Context, args: Arguments): Array[AnyRef] = {
     scale = math.max(0.333333, math.min(Settings.hologramMaxScaleByTier(tier), args.checkDouble(0)))
     ServerPacketSender.sendHologramScale(this)
     null
   }

   @Callback(doc = """function(index:number):number -- Get the color defined for the specified value.""")
   def getPaletteColor(computer: Context, args: Arguments): Array[AnyRef] = {
     val index = args.checkInteger(0)
     if (index < 0 || index >= colors.length) throw new ArrayIndexOutOfBoundsException()
     // Colors are stored as 0xAABBGGRR for rendering convenience, so convert them.
     result(convertColor(colors(index)))
   }

   @Callback(doc = """function(index:number, value:number):number -- Set the color defined for the specified value.""")
   def setPaletteColor(computer: Context, args: Arguments): Array[AnyRef] = {
     val index = args.checkInteger(0)
     if (index < 0 || index >= colors.length) throw new ArrayIndexOutOfBoundsException()
     val value = args.checkInteger(1)
     val oldValue = colors(index)
     // Change byte order here to allow passing stored color to OpenGL "as-is"
     // (as whole Int, i.e. 0xAABBGGRR, alpha is unused but present for alignment)
     colors(index) = convertColor(value)
     ServerPacketSender.sendHologramColor(this, index, value)
     result(oldValue)
   }

   private def checkCoordinates(args: Arguments, idxX: Int = 0, idxY: Int = 1, idxZ: Int = 2) = {
     val x = if (idxX >= 0) args.checkInteger(idxX) - 1 else 0
     if (x < 0 || x >= width) throw new ArrayIndexOutOfBoundsException("x")
     val y = if (idxY >= 0) args.checkInteger(idxY) - 1 else 0
     if (y < 0 || y >= height) throw new ArrayIndexOutOfBoundsException("y")
     val z = if (idxZ >= 0) args.checkInteger(idxZ) - 1 else 0
     if (z < 0 || z >= width) throw new ArrayIndexOutOfBoundsException("z")
     (x, y, z)
   }

   private def checkColor(args: Arguments, index: Int) = {
     val value =
       if (args.isBoolean(index))
         if (args.checkBoolean(index)) 1 else 0
       else
         args.checkInteger(index)
     if (value < 0 || value > colors.length) throw new IllegalArgumentException("invalid value")
     value
   }

   private def convertColor(color: Int) = {
     ((color & 0x0000FF) << 16) | (color & 0x00FF00) | ((color & 0xFF0000) >>> 16)
   }

   // ----------------------------------------------------------------------- //

   override def canUpdate = isServer

   override def updateEntity() {
     super.updateEntity()
     if (isServer) {
       if (dirty) {
         cooldown -= 1
         if (cooldown <= 0) this.synchronized {
           ServerPacketSender.sendHologramSet(this)
           resetDirtyFlag()
         }
       }
       if (world.getWorldTime % Settings.get.tickFrequency == 0) {
         if (litRatio < 0) this.synchronized {
           litRatio = 0
           for (i <- 0 until volume.length) {
             if (volume(i) != 0) litRatio += 1
           }
           litRatio /= volume.length
         }

         val hadPower = hasPower
         val neededPower = Settings.get.hologramCost * litRatio * scale * Settings.get.tickFrequency
         hasPower = node.tryChangeBuffer(-neededPower)
         if (hasPower != hadPower) {
           ServerPacketSender.sendHologramPowerChange(this)
         }
       }
     }
   }

   // ----------------------------------------------------------------------- //

   override def shouldRenderInPass(pass: Int) = pass == 1

   override def getMaxRenderDistanceSquared = scale / Settings.hologramMaxScaleByTier.max * Settings.get.hologramRenderDistance * Settings.get.hologramRenderDistance

   def getFadeStartDistanceSquared = scale / Settings.hologramMaxScaleByTier.max * Settings.get.hologramFadeStartDistance * Settings.get.hologramFadeStartDistance

   override def getRenderBoundingBox = AxisAlignedBB.getBoundingBox(xCoord + 0.5 - 1.5 * scale, yCoord, zCoord - scale, xCoord + 0.5 + 1.5 * scale, yCoord + 0.25 + 2 * scale, zCoord + 0.5 + 1.5 * scale)

   // ----------------------------------------------------------------------- //

   override def readFromNBT(nbt: NBTTagCompound) {
     tier = nbt.getByte(Settings.namespace + "tier") max 0 min 1
     super.readFromNBT(nbt)
     nbt.getIntArray(Settings.namespace + "volume").copyToArray(volume)
     nbt.getIntArray(Settings.namespace + "colors").map(convertColor).copyToArray(colors)
     scale = nbt.getDouble(Settings.namespace + "scale")
   }

   override def writeToNBT(nbt: NBTTagCompound) = this.synchronized {
     nbt.setByte(Settings.namespace + "tier", tier.toByte)
     super.writeToNBT(nbt)
     nbt.setIntArray(Settings.namespace + "volume", volume)
     nbt.setIntArray(Settings.namespace + "colors", colors.map(convertColor))
     nbt.setDouble(Settings.namespace + "scale", scale)
   }

   @SideOnly(Side.CLIENT)
   override def readFromNBTForClient(nbt: NBTTagCompound) {
     super.readFromNBTForClient(nbt)
     nbt.getIntArray("volume").copyToArray(volume)
     nbt.getIntArray("colors").copyToArray(colors)
     scale = nbt.getDouble("scale")
     hasPower = nbt.getBoolean("hasPower")
   }

   override def writeToNBTForClient(nbt: NBTTagCompound) {
     super.writeToNBTForClient(nbt)
     nbt.setIntArray("volume", volume)
     nbt.setIntArray("colors", colors)
     nbt.setDouble("scale", scale)
     nbt.setBoolean("hasPower", hasPower)
   }
 }
	package li.cil.oc.common.tileentity

	import cpw.mods.fml.relauncher.{Side, SideOnly}
	import li.cil.oc.api.network._
	import li.cil.oc.server.{PacketSender => ServerPacketSender}
	import li.cil.oc.{Settings, api}
	import net.minecraft.entity.player.EntityPlayer
	import net.minecraft.nbt.NBTTagCompound
	import net.minecraft.util.AxisAlignedBB
	import net.minecraftforge.common.util.ForgeDirection

	class Hologram(var tier: Int) extends traits.Environment with SidedEnvironment with Analyzable {
	def this() = this(0)

	val node = api.Network.newNode(this, Visibility.Network).
	withComponent("hologram").
	withConnector().
	create()

	val width = 3 * 16

	val height = 2 * 16 // 32 bit in an int

	// Layout is: first half is lower bit, second half is higher bit for the
	// voxels in the cube. This is to retain compatibility with pre 1.3 saves.
	val volume = new Array[Int](width * width * 2)

	// Render scale.
	var scale = 1.0

	// Relative number of lit columns (for energy cost).
	var litRatio = -1.0

	// Whether we need to send an update packet/recompile our display list.
	var dirty = false

	// Store it here for convenience, this is the number of visible voxel faces
	// as determined in the last VBO index update. See HologramRenderer.
	var visibleQuads = 0

	// Interval of dirty columns.
	var dirtyFromX = Int.MaxValue
	var dirtyUntilX = -1
	var dirtyFromZ = Int.MaxValue
	var dirtyUntilZ = -1

	// Time to wait before sending another update packet.
	var cooldown = 5

	var hasPower = true

	val colorsByTier = Array(Array(0x00FF00), Array(0x0000FF, 0x00FF00, 0xFF0000)) // 0xBBGGRR for rendering convenience

	// This is a def and not a val for loading (where the tier comes from the nbt and is always 0 here).
	def colors = colorsByTier(tier)

	def getColor(x: Int, y: Int, z: Int) = {
	val lbit = (volume(x + z * width) >>> y) & 1
	val hbit = (volume(x + z * width + width * width) >>> y) & 1
	lbit \| (hbit << 1)
	}

	def setColor(x: Int, y: Int, z: Int, value: Int) {
	if ((value & 3) != getColor(x, y, z)) {
	val lbit = value & 1
	val hbit = (value >>> 1) & 1
	volume(x + z * width) = (volume(x + z * width) & ~(1 << y)) \| (lbit << y)
	volume(x + z * width + width * width) = (volume(x + z * width + width * width) & ~(1 << y)) \| (hbit << y)
	setDirty(x, z)
	}
	}

	private def setDirty(x: Int, z: Int) {
	dirty = true
	dirtyFromX = math.min(dirtyFromX, x)
	dirtyUntilX = math.max(dirtyUntilX, x + 1)
	dirtyFromZ = math.min(dirtyFromZ, z)
	dirtyUntilZ = math.max(dirtyUntilZ, z + 1)
	litRatio = -1
	}

	private def resetDirtyFlag() {
	dirty = false
	dirtyFromX = Int.MaxValue
	dirtyUntilX = -1
	dirtyFromZ = Int.MaxValue
	dirtyUntilZ = -1
	cooldown = 5
	}

	// ----------------------------------------------------------------------- //

	@SideOnly(Side.CLIENT)
	override def canConnect(side: ForgeDirection) = side == ForgeDirection.DOWN

	override def sidedNode(side: ForgeDirection) = if (side == ForgeDirection.DOWN) node else null

	// Override automatic analyzer implementation for sided environments.
	override def onAnalyze(player: EntityPlayer, side: Int, hitX: Float, hitY: Float, hitZ: Float) = Array(node)

	// ----------------------------------------------------------------------- //

	@Callback(doc = """function() -- Clears the hologram.""")
	def clear(computer: Context, args: Arguments): Array[AnyRef] = this.synchronized {
	for (i <- 0 until volume.length) volume(i) = 0
	ServerPacketSender.sendHologramClear(this)
	resetDirtyFlag()
	litRatio = 0
	null
	}

	@Callback(direct = true, doc = """function(x:number, y:number, z:number):number -- Returns the value for the specified voxel.""")
	def get(computer: Context, args: Arguments): Array[AnyRef] = this.synchronized {
	val (x, y, z) = checkCoordinates(args)
	result(getColor(x, y, z))
	}

	@Callback(direct = true, limit = 256, doc = """function(x:number, y:number, z:number, value:number or boolean) -- Set the value for the specified voxel.""")
	def set(computer: Context, args: Arguments): Array[AnyRef] = this.synchronized {
	val (x, y, z) = checkCoordinates(args)
	val value = checkColor(args, 3)
	setColor(x, y, z, value)
	null
	}

	@Callback(direct = true, limit = 128, doc = """function(x:number, z:number, height:number, value:number or boolean) -- Fills a column to the specified height.""")
	def fill(computer: Context, args: Arguments): Array[AnyRef] = this.synchronized {
	val (x, _, z) = checkCoordinates(args, 0, -1, 1)
	val height = math.min(32, math.max(0, args.checkInteger(2)))
	val value = checkColor(args, 3)

	val lbit = value & 1
	val hbit = (value >>> 1) & 1
	if (lbit == 0 \|\| height == 0) volume(x + z * width) = 0
	else volume(x + z * width) = 0xFFFFFFFF >>> (32 - height)
	if (hbit == 0 \|\| height == 0) volume(x + z * width + width * width) = 0
	else volume(x + z * width + width * width) = 0xFFFFFFFF >>> (32 - height)

	setDirty(x, z)
	null
	}

	@Callback(doc = """function(x:number, z:number, sx:number, sz:number, tx:number, tz:number) -- Copies an area of columns by the specified translation.""")
	def copy(computer: Context, args: Arguments): Array[AnyRef] = this.synchronized {
	val (x, _, z) = checkCoordinates(args, 0, -1, 1)
	val w = args.checkInteger(2)
	val h = args.checkInteger(3)
	val tx = args.checkInteger(4)
	val tz = args.checkInteger(5)

	// Anything to do at all?
	if (w <= 0 \|\| h <= 0) return null
	if (tx == 0 && tz == 0) return null
	// Loop over the target rectangle, starting from the directions away from
	// the source rectangle and copy the data. This way we ensure we don't
	// overwrite anything we still need to copy.
	val (dx0, dx1) = (math.max(0, math.min(width - 1, x + tx + w - 1)), math.max(0, math.min(width, x + tx))) match {
	case dx if tx > 0 => dx
	case dx => dx.swap
	}
	val (dz0, dz1) = (math.max(0, math.min(width - 1, z + tz + h - 1)), math.max(0, math.min(width, z + tz))) match {
	case dz if tz > 0 => dz
	case dz => dz.swap
	}
	val (sx, sz) = (if (tx > 0) -1 else 1, if (tz > 0) -1 else 1)
	// Copy values to destination rectangle if there source is valid.
	for (nz <- dz0 to dz1 by sz) {
	nz - tz match {
	case oz if oz >= 0 && oz < width =>
	for (nx <- dx0 to dx1 by sx) {
	nx - tx match {
	case ox if ox >= 0 && ox < width =>
	volume(nz * width + nx) = volume(oz * width + ox)
	volume(nz * width + nx + width * width) = volume(oz * width + ox + width * width)
	case _ => /* Got no source column. */
	}
	}
	case _ => /* Got no source row. */
	}
	}

	// Mark target rectangle dirty.
	setDirty(math.min(dx0, dx1), math.min(dz0, dz1))
	setDirty(math.max(dx0, dx1), math.max(dz0, dz1))

	// The reasoning here is: it'd take 18 ticks to do the whole are with fills,
	// so make this slightly more efficient (15 ticks - 0.75 seconds). Make it
	// 'free' if it's less than 0.25 seconds, i.e. for small copies.
	val area = (math.max(dx0, dx1) - math.min(dx0, dx1)) * (math.max(dz0, dz1) - math.min(dz0, dz1))
	val relativeArea = math.max(0, area / (width * width).toFloat - 0.25)
	computer.pause(relativeArea)

	null
	}

	@Callback(doc = """function():number -- Returns the render scale of the hologram.""")
	def getScale(computer: Context, args: Arguments): Array[AnyRef] = {
	result(scale)
	}

	@Callback(doc = """function(value:number) -- Set the render scale. A larger scale consumes more energy.""")
	def setScale(computer: Context, args: Arguments): Array[AnyRef] = {
	scale = math.max(0.333333, math.min(Settings.hologramMaxScaleByTier(tier), args.checkDouble(0)))
	ServerPacketSender.sendHologramScale(this)
	null
	}

	@Callback(doc = """function(index:number):number -- Get the color defined for the specified value.""")
	def getPaletteColor(computer: Context, args: Arguments): Array[AnyRef] = {
	val index = args.checkInteger(0)
	if (index < 0 \|\| index >= colors.length) throw new ArrayIndexOutOfBoundsException()
	// Colors are stored as 0xAABBGGRR for rendering convenience, so convert them.
	result(convertColor(colors(index)))
	}

	@Callback(doc = """function(index:number, value:number):number -- Set the color defined for the specified value.""")
	def setPaletteColor(computer: Context, args: Arguments): Array[AnyRef] = {
	val index = args.checkInteger(0)
	if (index < 0 \|\| index >= colors.length) throw new ArrayIndexOutOfBoundsException()
	val value = args.checkInteger(1)
	val oldValue = colors(index)
	// Change byte order here to allow passing stored color to OpenGL "as-is"
	// (as whole Int, i.e. 0xAABBGGRR, alpha is unused but present for alignment)
	colors(index) = convertColor(value)
	ServerPacketSender.sendHologramColor(this, index, value)
	result(oldValue)
	}

	private def checkCoordinates(args: Arguments, idxX: Int = 0, idxY: Int = 1, idxZ: Int = 2) = {
	val x = if (idxX >= 0) args.checkInteger(idxX) - 1 else 0
	if (x < 0 \|\| x >= width) throw new ArrayIndexOutOfBoundsException("x")
	val y = if (idxY >= 0) args.checkInteger(idxY) - 1 else 0
	if (y < 0 \|\| y >= height) throw new ArrayIndexOutOfBoundsException("y")
	val z = if (idxZ >= 0) args.checkInteger(idxZ) - 1 else 0
	if (z < 0 \|\| z >= width) throw new ArrayIndexOutOfBoundsException("z")
	(x, y, z)
	}

	private def checkColor(args: Arguments, index: Int) = {
	val value =
	if (args.isBoolean(index))
	if (args.checkBoolean(index)) 1 else 0
	else
	args.checkInteger(index)
	if (value < 0 \|\| value > colors.length) throw new IllegalArgumentException("invalid value")
	value
	}

	private def convertColor(color: Int) = {
	((color & 0x0000FF) << 16) \| (color & 0x00FF00) \| ((color & 0xFF0000) >>> 16)
	}

	// ----------------------------------------------------------------------- //

	override def canUpdate = isServer

	override def updateEntity() {
	super.updateEntity()
	if (isServer) {
	if (dirty) {
	cooldown -= 1
	if (cooldown <= 0) this.synchronized {
	ServerPacketSender.sendHologramSet(this)
	resetDirtyFlag()
	}
	}
	if (world.getWorldTime % Settings.get.tickFrequency == 0) {
	if (litRatio < 0) this.synchronized {
	litRatio = 0
	for (i <- 0 until volume.length) {
	if (volume(i) != 0) litRatio += 1
	}
	litRatio /= volume.length
	}

	val hadPower = hasPower
	val neededPower = Settings.get.hologramCost * litRatio * scale * Settings.get.tickFrequency
	hasPower = node.tryChangeBuffer(-neededPower)
	if (hasPower != hadPower) {
	ServerPacketSender.sendHologramPowerChange(this)
	}
	}
	}
	}

	// ----------------------------------------------------------------------- //

	override def shouldRenderInPass(pass: Int) = pass == 1

	override def getMaxRenderDistanceSquared = scale / Settings.hologramMaxScaleByTier.max * Settings.get.hologramRenderDistance * Settings.get.hologramRenderDistance

	def getFadeStartDistanceSquared = scale / Settings.hologramMaxScaleByTier.max * Settings.get.hologramFadeStartDistance * Settings.get.hologramFadeStartDistance

	override def getRenderBoundingBox = AxisAlignedBB.getBoundingBox(xCoord + 0.5 - 1.5 * scale, yCoord, zCoord - scale, xCoord + 0.5 + 1.5 * scale, yCoord + 0.25 + 2 * scale, zCoord + 0.5 + 1.5 * scale)

	// ----------------------------------------------------------------------- //

	override def readFromNBT(nbt: NBTTagCompound) {
	tier = nbt.getByte(Settings.namespace + "tier") max 0 min 1
	super.readFromNBT(nbt)
	nbt.getIntArray(Settings.namespace + "volume").copyToArray(volume)
	nbt.getIntArray(Settings.namespace + "colors").map(convertColor).copyToArray(colors)
	scale = nbt.getDouble(Settings.namespace + "scale")
	}

	override def writeToNBT(nbt: NBTTagCompound) = this.synchronized {
	nbt.setByte(Settings.namespace + "tier", tier.toByte)
	super.writeToNBT(nbt)
	nbt.setIntArray(Settings.namespace + "volume", volume)
	nbt.setIntArray(Settings.namespace + "colors", colors.map(convertColor))
	nbt.setDouble(Settings.namespace + "scale", scale)
	}

	@SideOnly(Side.CLIENT)
	override def readFromNBTForClient(nbt: NBTTagCompound) {
	super.readFromNBTForClient(nbt)
	nbt.getIntArray("volume").copyToArray(volume)
	nbt.getIntArray("colors").copyToArray(colors)
	scale = nbt.getDouble("scale")
	hasPower = nbt.getBoolean("hasPower")
	}

	override def writeToNBTForClient(nbt: NBTTagCompound) {
	super.writeToNBTForClient(nbt)
	nbt.setIntArray("volume", volume)
	nbt.setIntArray("colors", colors)
	nbt.setDouble("scale", scale)
	nbt.setBoolean("hasPower", hasPower)
	}
	}