Java – set block data from schematic in bukkit?
•
Java
I tried to load and paste in bukkit Schematic file (not linked to mcedit API) Here are the functions / methods I use to paste schematic diagrams When pasting, I keep receiving NullPointerException during the pasting process When I record the items placed, I see grass, stones, but not my box, anything in the box, or beacons (maybe more)
An error occurred on this line: block setData(blockData [index],true);
I think this has to do with metadata, but how do I get this information from the schematic file and apply it to each block?
Question: how to use metadata to paste items (chest 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(),1,0)));
} else {
getLogger().info("Block is a " + block.getType().toString() + " block!");
}
}
}
}
}
And load the schematic file:
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 after further testing, even if I removed my chest and Lighthouse (just grass and stone), errors still occurred If it helps, I call this event on onsignchange
The following are errors in the console:
[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
Line 132 in skywars is like this: block setData(blockData [index],true); The line in gameevents is when I call this method
Update 2 the following is some code for API usage
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!");
}
}
}
}
}
Solution
I don't use any other external import, even jnbt, which is now included in my world by default. Do the following:
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;
}
Now you can iterate over the list returned by pasteschematic after placing all the blocks This is how you do it:
List<Location> locationss = pasteSchematic(mySchematicFile);
for(Location loc : locations){
if(loc.getBlock().getType().equals(Material.BEACON)){
//a beacon was plasted at the loc
}
}
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