在Bukkit中从原理图设置块数据？
我试图在.schematic加载并粘贴一个.schematic文件（不需要挂钩MCEdit API）。 下面是我用来粘贴原理图的function/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： How can i paste items with metaData like (Chest with contents, torches, beacons, etc.?
@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(),0,1,0))); } 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 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 getChildTag(Map items, String key, Class 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); }
更新进一步测试后，即使我移除胸部和灯塔（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 topBlockY = (loc1.getBlockY() loc2.getBlockY() ? loc2.getBlockY() : loc1.getBlockY()); int topBlockZ = (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(),0,1,0))); } else { getLogger().info("Block is a " + block.getType().toString() + " block!"); } } } } }
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 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 locations = new ArrayList (); //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(), x + loc.getX(), y + loc.getY(), 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之后迭代pasteSchematic返回的List 。 这是你如何做到的：
List locationss = pasteSchematic(mySchematicFile); for(Location loc : locations){ if(loc.getBlock().getType().equals(Material.BEACON)){ //a beacon was plasted at the loc } }
只要你有一个原理图实例和一个带有WorldEdit API的位置，这很简单：
public boolean pasteSchematic(Location origin, CuboidClipboard schematic) { EditSession editSession = new EditSession(BukkitUtil.getLocalWorld(origin.getWorld()), -1); //-1 means no limit on blocks try { schematic.paste(editSession, new Vector(origin.getBlockX(), origin.getBlockY(), origin.getBlockZ()), true); // The 'true' boolean is whether or not to paste for air } catch (MaxChangedBlocksException ignored) { return false; } return true; }
并从文件中加载CuboidClipboard：
File f = /* your schematic file */; SchematicFormat format = SchematicFormat.getFormat(f); CuboidClipboard paste = format.load(f);