Add lecterns

src/main/java/electroblob/wizardry/tileentity/TileEntityLectern.java

@@ -0,0 +1,98 @@
+package electroblob.wizardry.tileentity;
+
+import electroblob.wizardry.registry.Spells;
+import electroblob.wizardry.spell.Spell;
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.nbt.NBTTagCompound;
+import net.minecraft.network.NetworkManager;
+import net.minecraft.network.play.server.SPacketUpdateTileEntity;
+import net.minecraft.tileentity.TileEntity;
+import net.minecraft.util.ITickable;
+import net.minecraft.util.math.MathHelper;
+
+import java.util.Random;
+
+/** Controls the book animations and remembers the GUI state when not in use. */
+public class TileEntityLectern extends TileEntity implements ITickable {
+
+	public static final double BOOK_OPEN_DISTANCE = 5;
+
+	private static final Random rand = new Random();
+
+	public int ticksExisted;
+	public float pageFlip;
+	public float pageFlipPrev;
+	public float flipT;
+	public float flipA;
+	public float bookSpread;
+	public float bookSpreadPrev;
+
+	public Spell currentSpell = Spells.none;
+
+	@Override
+	public void update(){
+
+		this.bookSpreadPrev = this.bookSpread;
+
+		EntityPlayer entityplayer = this.world.getClosestPlayer(this.pos.getX() + 0.5, this.pos.getY() + 0.5,
+				this.pos.getZ() + 0.5, BOOK_OPEN_DISTANCE, false);
+
+		if(entityplayer != null){
+
+			this.bookSpread += 0.1f;
+
+			if(this.bookSpread < 0.5f || rand.nextInt(40) == 0){
+				float f1 = this.flipT;
+				while(f1 == flipT) this.flipT += (float)(rand.nextInt(4) - rand.nextInt(4));
+			}
+
+		}else{
+			this.bookSpread -= 0.1f;
+		}
+
+		this.bookSpread = MathHelper.clamp(this.bookSpread, 0.0f, 1.0f);
+
+		this.ticksExisted++;
+
+		this.pageFlipPrev = this.pageFlip;
+		float f = (this.flipT - this.pageFlip) * 0.4f;
+		f = MathHelper.clamp(f, -0.2f, 0.2f);
+		this.flipA += (f - this.flipA) * 0.9f;
+		this.pageFlip += this.flipA;
+
+	}
+
+	/** Called to manually sync the tile entity with clients. */
+	public void sync(){
+		this.world.notifyBlockUpdate(pos, world.getBlockState(pos), world.getBlockState(pos), 3);
+	}
+
+	@Override
+	public NBTTagCompound writeToNBT(NBTTagCompound compound){
+		super.writeToNBT(compound); // Confusingly, this method both writes to the supplied compound and returns it
+		compound.setInteger("spell", currentSpell.metadata());
+		return compound;
+	}
+
+	@Override
+	public void readFromNBT(NBTTagCompound compound){
+		super.readFromNBT(compound);
+		currentSpell = Spell.byMetadata(compound.getInteger("spell"));
+	}
+
+	@Override
+	public final NBTTagCompound getUpdateTag(){
+		return this.writeToNBT(new NBTTagCompound());
+	}
+
+	@Override
+	public SPacketUpdateTileEntity getUpdatePacket(){
+		return new SPacketUpdateTileEntity(pos, getBlockMetadata(), this.getUpdateTag());
+	}
+
+	@Override
+	public void onDataPacket(NetworkManager net, SPacketUpdateTileEntity pkt){
+		readFromNBT(pkt.getNbtCompound());
+	}
+
+}