HousePieces.Piece

public static class Piece extends TemplateStructurePiece {
		private ResourceLocation resourceLocation;
		private Rotation rotation;

		public Piece(TemplateManager templateManagerIn, ResourceLocation resourceLocationIn, BlockPos pos,
				Rotation rotationIn) {
			super(FeatureInit.HOUSE_PIECE, 0);
			this.resourceLocation = resourceLocationIn;
			BlockPos blockpos = HousePieces.OFFSET.get(resourceLocation);
			this.templatePosition = pos.add(blockpos.getX(), blockpos.getY(), blockpos.getZ());
			this.rotation = rotationIn;
			this.setupPiece(templateManagerIn);
		}

		public Piece(TemplateManager templateManagerIn, CompoundNBT tagCompound) {
			super(FeatureInit.HOUSE_PIECE, tagCompound);
			this.resourceLocation = new ResourceLocation(tagCompound.getString("Template"));
			this.rotation = Rotation.valueOf(tagCompound.getString("Rot"));
			this.setupPiece(templateManagerIn);
		}

		private void setupPiece(TemplateManager templateManager) {
			Template template = templateManager.getTemplateDefaulted(this.resourceLocation);
			PlacementSettings placementsettings = (new PlacementSettings()).setRotation(this.rotation)
					.setMirror(Mirror.NONE);
			this.setup(template, this.templatePosition, placementsettings);
		}

		@Override
		protected void readAdditional(CompoundNBT tagCompound) {
			super.readAdditional(tagCompound);
			tagCompound.putString("Template", this.resourceLocation.toString());
			tagCompound.putString("Rot", this.rotation.name());
		}

		@Override
		protected void handleDataMarker(String function, BlockPos pos, IWorld worldIn, Random rand,
				MutableBoundingBox sbb) {
			if ("chest".equals(function)) {
				worldIn.setBlockState(pos, Blocks.CHEST.getDefaultState(), 2);
				TileEntity tileentity = worldIn.getTileEntity(pos);
				if (tileentity instanceof ChestTileEntity) {
					// here you can set any loot tables for the chests
				}
			}
		}

		// create
		@Override
		public boolean func_225577_a_(IWorld worldIn, ChunkGenerator<?> generator, Random randomIn,
				MutableBoundingBox structureBoundingBoxIn, ChunkPos chunkPos) {
			PlacementSettings placementsettings = (new PlacementSettings()).setRotation(this.rotation)
					.setMirror(Mirror.NONE);
			BlockPos blockpos = HousePieces.OFFSET.get(this.resourceLocation);
			this.templatePosition.add(Template.transformedBlockPos(placementsettings,
					new BlockPos(0 - blockpos.getX(), 0, 0 - blockpos.getZ())));

			return super.func_225577_a_(worldIn, generator, randomIn, structureBoundingBoxIn, chunkPos);
		}
	}