clean up Structure API

common/api/core/src/main/java/com/dfsek/terra/api/structure/Structure.java

@@ -18,9 +18,5 @@ import com.dfsek.terra.api.world.chunk.Chunk;
 
 
 public interface Structure extends StringIdentifiable {
-    boolean generate(Vector3 location, WritableWorld world, Chunk chunk, Random random, Rotation rotation);
-    
-    boolean generate(Buffer buffer, WritableWorld world, Random random, Rotation rotation, int recursions);
-    
     boolean generate(Vector3 location, WritableWorld world, Random random, Rotation rotation);
 }

common/api/core/src/main/java/com/dfsek/terra/api/world/BufferedWorld.java

@@ -0,0 +1,82 @@
+package com.dfsek.terra.api.world;
+
+import com.dfsek.terra.api.block.entity.BlockEntity;
+import com.dfsek.terra.api.block.state.BlockState;
+import com.dfsek.terra.api.config.ConfigPack;
+import com.dfsek.terra.api.entity.Entity;
+import com.dfsek.terra.api.entity.EntityType;
+import com.dfsek.terra.api.world.biome.generation.BiomeProvider;
+import com.dfsek.terra.api.world.chunk.generation.ChunkGenerator;
+
+
+public class BufferedWorld implements WritableWorld {
+    private final WritableWorld delegate;
+    private final int offsetX, offsetY, offsetZ;
+    
+    protected BufferedWorld(WritableWorld delegate, int offsetX, int offsetY, int offsetZ) {
+        this.delegate = delegate;
+        this.offsetX = offsetX;
+        
+        this.offsetY = offsetY;
+        this.offsetZ = offsetZ;
+    }
+    
+    @Override
+    public Object getHandle() {
+        return delegate.getHandle();
+    }
+    
+    @Override
+    public BlockState getBlockState(int x, int y, int z) {
+        return delegate.getBlockState(x + offsetX, y + offsetY, z + offsetZ);
+    }
+    
+    @Override
+    public BlockEntity getBlockEntity(int x, int y, int z) {
+        return delegate.getBlockEntity(x + offsetX, y + offsetY, z + offsetZ);
+    }
+    
+    @Override
+    public long getSeed() {
+        return delegate.getSeed();
+    }
+    
+    @Override
+    public int getMaxHeight() {
+        return delegate.getMaxHeight();
+    }
+    
+    @Override
+    public int getMinHeight() {
+        return delegate.getMinHeight();
+    }
+    
+    @Override
+    public ChunkGenerator getGenerator() {
+        return delegate.getGenerator();
+    }
+    
+    @Override
+    public BiomeProvider getBiomeProvider() {
+        return delegate.getBiomeProvider();
+    }
+    
+    @Override
+    public ConfigPack getPack() {
+        return delegate.getPack();
+    }
+    
+    @Override
+    public void setBlockState(int x, int y, int z, BlockState data, boolean physics) {
+        delegate.setBlockState(x + offsetX, y + offsetY, z + offsetZ, data, physics);
+    }
+    
+    @Override
+    public Entity spawnEntity(double x, double y, double z, EntityType entityType) {
+        return delegate.spawnEntity(x + offsetX, y + offsetY, z + offsetZ, entityType);
+    }
+    
+    public WritableWorld getDelegate() {
+        return delegate;
+    }
+}

common/api/core/src/main/java/com/dfsek/terra/api/world/WritableWorld.java

@@ -28,4 +28,7 @@ public interface WritableWorld extends ReadableWorld {
     
     Entity spawnEntity(double x, double y, double z, EntityType entityType);
     
+    default BufferedWorld buffer(int offsetX, int offsetY, int offsetZ) {
+        return new BufferedWorld(this, offsetX, offsetY, offsetZ);
+    }
 }