我试图在bukkit中加载和粘贴.schematic文件(不挂钩MCEdit API).下面是我用来粘贴原理图的功能/方法.粘贴时,我在粘贴过程中不断收到NullPointerException.当我记录放置的物品时,我看到草块,石头,但不是我的箱子,箱子里的任何东西,或信标(可能更多块).
此行发生错误:block.setData(blockData [index],true);
我认为这必须与MetaData有关,但我如何从原理图文件中获取该信息并将其应用于每个块?
问题:如何使用MetaData粘贴项目(胸部有内容,火把,信标等?
@SuppressWarnings("deprecation") public void pasteSchematic(World world,Location loc,Schematic schematic) { byte[] blocks = schematic.getBlocks(); byte[] blockData = schematic.getData(); short length = schematic.getLenght(); short width = schematic.getWidth(); short height = schematic.getHeight(); for (int x = 0; x < width; ++x) { for (int y = 0; y < height; ++y) { for (int z = 0; z < length; ++z) { int index = y * width * length + z * width + x; Block block = new Location(world,x + loc.getX(),y + loc.getY(),z + loc.getZ()).getBlock(); block.setTypeId(blocks[index],true); block.setData(blockData[index],true); if(block.getType() == Material.BEACON || block instanceof Beacon) { // Add location up one block getLogger().info("Block is a Beacon!"); spawnLocations.add(block.getLocation().add(new Location(block.getWorld(),1,0))); } else { getLogger().info("Block is a " + block.getType().toString() + " block!"); } } } } }
并加载原理图文件:
public Schematic loadSchematic(File file) throws IOException { FileInputStream stream = new FileInputStream(file); @SuppressWarnings("resource") NBTInputStream nbtStream = new NBTInputStream(stream); CompoundTag schematicTag = (CompoundTag) nbtStream.readTag(); if (!schematicTag.getName().equals("Schematic")) { throw new IllegalArgumentException("Tag \"Schematic\" does not exist or is not first"); } Map<String,Tag> schematic = schematicTag.getValue(); if (!schematic.containsKey("Blocks")) { throw new IllegalArgumentException("Schematic file is missing a \"Blocks\" tag"); } short width = getChildTag(schematic,"Width",ShortTag.class).getValue(); short length = getChildTag(schematic,"Length",ShortTag.class).getValue(); short height = getChildTag(schematic,"Height",ShortTag.class).getValue(); String materials = getChildTag(schematic,"Materials",StringTag.class).getValue(); if (!materials.equals("Alpha")) { throw new IllegalArgumentException("Schematic file is not an Alpha schematic"); } byte[] blocks = getChildTag(schematic,"Blocks",ByteArrayTag.class).getValue(); byte[] blockData = getChildTag(schematic,"Data",ByteArrayTag.class).getValue(); return new Schematic(blocks,blockData,width,length,height); } /** * Get child tag of a NBT structure. * * @param items The parent tag map * @param key The name of the tag to get * @param expected The expected type of the tag * @return child tag casted to the expected type * @throws DataException if the tag does not exist or the tag is not of the * expected type */ private static <T extends Tag> T getChildTag(Map<String,Tag> items,String key,Class<T> expected) throws IllegalArgumentException { if (!items.containsKey(key)) { throw new IllegalArgumentException("Schematic file is missing a \"" + key + "\" tag"); } Tag tag = items.get(key); if (!expected.isinstance(tag)) { throw new IllegalArgumentException(key + " tag is not of tag type " + expected.getName()); } return expected.cast(tag); }
UPDATE
经过进一步测试,即使我移除了胸部和灯塔(只是草和石头),仍然会发生错误.如果有帮助,我在onSignChange上调用此事件.
以下是控制台中的错误:
[21:34:22 ERROR]: Could not pass event SignChangeEvent to SkyWars v1.0.0 org.bukkit.event.EventException at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja va:294) ~[server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav a:62) ~[server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j ava:501) [server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j ava:486) [server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at net.minecraft.server.v1_7_R3.PlayerConnection.a(PlayerConnection.java :1586) [server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at net.minecraft.server.v1_7_R3.PacketPlayInUpdateSign.a(SourceFile:48) [server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at net.minecraft.server.v1_7_R3.PacketPlayInUpdateSign.handle(SourceFile :9) [server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at net.minecraft.server.v1_7_R3.NetworkManager.a(NetworkManager.java:157 ) [server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at net.minecraft.server.v1_7_R3.ServerConnection.c(SourceFile:134) [serv er.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at net.minecraft.server.v1_7_R3.minecraftServer.v(minecraftServer.java:6 67) [server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:2 60) [server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at net.minecraft.server.v1_7_R3.minecraftServer.u(minecraftServer.java:5 58) [server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at net.minecraft.server.v1_7_R3.minecraftServer.run(minecraftServer.java :469) [server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:6 28) [server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] Caused by: java.lang.NullPointerException at org.bukkit.craftbukkit.v1_7_R3.util.CraftMagicNumbers.getBlock(CraftM agicNumbers.java:80) ~[server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at org.bukkit.craftbukkit.v1_7_R3.util.CraftMagicNumbers.getBlock(CraftM agicNumbers.java:36) ~[server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at org.bukkit.craftbukkit.v1_7_R3.block.CraftBlock.getNMSBlock(CraftBloc k.java:55) ~[server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at org.bukkit.craftbukkit.v1_7_R3.block.CraftBlock.setTypeIdAndData(Craf tBlock.java:129) ~[server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at org.bukkit.craftbukkit.v1_7_R3.block.CraftBlock.setTypeId(CraftBlock. java:124) ~[server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] at com.FeaRCode.SkyWars.SkyWars.pasteSchematic(SkyWars.java:132) ~[?:?] at com.FeaRCode.SkyWars.GameEvents.OnSignChange(GameEvents.java:33) ~[?: ?] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0 _05] at sun.reflect.NativeMethodAccessorImpl.invoke(UnkNown Source) ~[?:1.8.0 _05] at sun.reflect.DelegatingMethodAccessorImpl.invoke(UnkNown Source) ~[?:1 .8.0_05] at java.lang.reflect.Method.invoke(UnkNown Source) ~[?:1.8.0_05] at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja va:292) ~[server.jar:git-Bukkit-1.7.9-R0.1-6-g4d832c3-b3090jnks] ... 13 more
在skywars中的第132行是这样的:block.setData(blockData [index],true);
GameEvents中的行是我调用此方法的时候.
更新2
以下是API Usage的一些代码
public void pasteSchematic(World world,Location loc) { File schematic = new File(this.getDataFolder() + File.separator + fileName); Location topLeft; Location bottomright; Vector v = new Vector(loc.getBlockX(),loc.getBlockY(),loc.getBlockZ()); BukkitWorld BWf = new BukkitWorld(currentWorld); EditSession es = new EditSession(BWf,-1); try { CuboidClipboard cc = SchematicFormat.getFormat(schematic).load(schematic); try { cc.paste(es,v,true); topLeft = new Location(currentWorld,loc.getBlockX() + cc.getWidth(),loc.getBlockY() + cc.getHeight(),loc.getBlockZ() + cc.getLength()); bottomright = new Location(currentWorld,loc.getBlockX() - cc.getWidth(),loc.getBlockY() - cc.getHeight(),loc.getBlockZ() - cc.getLength()); calculateSpawnLocations(topLeft,bottomright); } catch (MaxChangedBlocksException e) { e.printstacktrace(); } } catch (IOException e) { e.printstacktrace(); } catch (DataException e) { e.printstacktrace(); } } public void calculateSpawnLocations(Location loc1,Location loc2) { int topBlockX = (loc1.getBlockX() < loc2.getBlockX() ? loc2.getBlockX() : loc1.getBlockX()); int bottomBlockX = (loc1.getBlockX() > loc2.getBlockX() ? loc2.getBlockX() : loc1.getBlockX()); int topBlockY = (loc1.getBlockY() < loc2.getBlockY() ? loc2.getBlockY() : loc1.getBlockY()); int bottomBlockY = (loc1.getBlockY() > loc2.getBlockY() ? loc2.getBlockY() : loc1.getBlockY()); int topBlockZ = (loc1.getBlockZ() < loc2.getBlockZ() ? loc2.getBlockZ() : loc1.getBlockZ()); int bottomBlockZ = (loc1.getBlockZ() > loc2.getBlockZ() ? loc2.getBlockZ() : loc1.getBlockZ()); for(int x = bottomBlockX; x <= topBlockX; x++) { for(int z = bottomBlockZ; z <= topBlockZ; z++) { for(int y = bottomBlockY; y <= topBlockY; y++) { Block block = loc1.getWorld().getBlockAt(x,y,z); if(block instanceof Beacon || block.getType() == Material.BEACON || block.getType().equals(Material.BEACON)) { // Add location up one block getLogger().info("Block is a Beacon!"); spawnLocations.add(block.getLocation().add(new Location(block.getWorld(),0))); } else { getLogger().info("Block is a " + block.getType().toString() + " block!"); } } } } }
解决方法
我没有使用任何其他外部导入,甚至jnbt,默认情况下现在包含在我的世界中,通过执行以下操作:
public class Schematic{ public List<Location> pasteSchematic(File f){ try{ FileInputStream fis = new FileInputStream(f); NBTTagCompound nbt = NBTCompressedStreamTools.a(fis); short width = nbt.getShort("Width"); short height = nbt.getShort("Height"); short length = nbt.getShort("Length"); byte[] blocks = nbt.getByteArray("Blocks"); byte[] data = nbt.getByteArray("Data"); fis.close(); List<Location> locations = new ArrayList<Location>(); //paste for(int x = 0; x < this.width; ++x){ for(int y = 0; y < this.height; ++y){ for(int z = 0; z < this.length; ++z){ int index = y * this.width * this.length + z * this.width + x; final Location l = new Location(loc.getWorld(),z + loc.getZ()); int b = this.blocks[index] & 0xFF;//make the block unsigned,so that blocks with an id over 127,like quartz and emerald,can be pasted final Block block = l.getBlock(); block.setType(Material.getMaterial(b)); block.setData(this.data[index]); Material m = Material.getMaterial(b); //you can check what type the block is here,like if(m.equals(Material.BEACON)) to check if it's a beacon locations.add(l); } } } } catch(Exception e){e.printstacktrace();} } return locations; }
现在,您可以在放置所有块后迭代pasteSchematic返回的List.这是你如何做到的:
List<Location> locationss = pasteSchematic(mySchematicFile); for(Location loc : locations){ if(loc.getBlock().getType().equals(Material.BEACON)){ //a beacon was plasted at the loc } }