Display book names above book stands

src/main/java/net/dnorberg/rivencraft/block/entity/BookStandBlockEntity.java

@@ -4,6 +4,9 @@ import net.dnorberg.rivencraft.registry.ModBlockEntities;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.HolderLookup;
 import net.minecraft.nbt.CompoundTag;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.ClientGamePacketListener;
+import net.minecraft.network.protocol.game.ClientboundBlockEntityDataPacket;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.level.block.entity.BlockEntity;
 import net.minecraft.world.level.block.state.BlockState;
@@ -22,16 +25,33 @@ public final class BookStandBlockEntity extends BlockEntity {
 
     public void setBook(ItemStack book) {
         this.book = book;
-        setChanged();
+        setChangedAndSync();
     }
 
     public ItemStack takeBook() {
         ItemStack result = book;
         book = ItemStack.EMPTY;
-        setChanged();
+        setChangedAndSync();
         return result;
     }
 
+    @Override
+    public Packet<ClientGamePacketListener> getUpdatePacket() {
+        return ClientboundBlockEntityDataPacket.create(this);
+    }
+
+    @Override
+    public CompoundTag getUpdateTag(HolderLookup.Provider registries) {
+        return saveWithoutMetadata(registries);
+    }
+
+    private void setChangedAndSync() {
+        setChanged();
+        if (level != null && !level.isClientSide) {
+            level.sendBlockUpdated(worldPosition, getBlockState(), getBlockState(), 2);
+        }
+    }
+
     @Override
     protected void loadAdditional(CompoundTag tag, HolderLookup.Provider registries) {
         super.loadAdditional(tag, registries);

src/main/java/net/dnorberg/rivencraft/client/BookStandRenderer.java

@@ -7,18 +7,27 @@ import net.dnorberg.rivencraft.block.BookStandBlock;
 import net.dnorberg.rivencraft.block.entity.BookStandBlockEntity;
 import net.minecraft.client.model.BookModel;
 import net.minecraft.client.model.geom.ModelLayers;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.Font;
 import net.minecraft.client.renderer.MultiBufferSource;
 import net.minecraft.client.renderer.RenderType;
 import net.minecraft.client.renderer.blockentity.BlockEntityRenderer;
 import net.minecraft.client.renderer.blockentity.BlockEntityRendererProvider;
 import net.minecraft.client.renderer.blockentity.EnchantTableRenderer;
+import net.minecraft.client.renderer.entity.EntityRenderDispatcher;
+import net.minecraft.network.chat.Component;
 import net.minecraft.world.level.block.state.BlockState;
+import org.joml.Matrix4f;
 
 public final class BookStandRenderer implements BlockEntityRenderer<BookStandBlockEntity> {
     private final BookModel bookModel;
+    private final Font font;
+    private final EntityRenderDispatcher entityRenderer;
 
     public BookStandRenderer(BlockEntityRendererProvider.Context context) {
         bookModel = new BookModel(context.bakeLayer(ModelLayers.BOOK));
+        font = context.getFont();
+        entityRenderer = context.getEntityRenderer();
     }
 
     @Override
@@ -45,5 +54,28 @@ public final class BookStandRenderer implements BlockEntityRenderer<BookStandBlo
         VertexConsumer consumer = EnchantTableRenderer.BOOK_LOCATION.buffer(bufferSource, RenderType::entitySolid);
         bookModel.render(poseStack, consumer, packedLight, packedOverlay, -1);
         poseStack.popPose();
+
+        if (!blockEntity.getBook().isEmpty()) {
+            renderName(blockEntity.getBook().getHoverName(), poseStack, bufferSource, packedLight);
+        }
+    }
+
+    private void renderName(
+            Component name,
+            PoseStack poseStack,
+            MultiBufferSource bufferSource,
+            int packedLight
+    ) {
+        poseStack.pushPose();
+        poseStack.translate(0.5F, 1.6F, 0.5F);
+        poseStack.mulPose(entityRenderer.cameraOrientation());
+        poseStack.scale(-0.025F, -0.025F, 0.025F);
+
+        Matrix4f matrix = poseStack.last().pose();
+        float x = -font.width(name) / 2.0F;
+        int background = (int)(Minecraft.getInstance().options.getBackgroundOpacity(0.25F) * 255.0F) << 24;
+        font.drawInBatch(name, x, 0.0F, 0xFFFFFFFF, false, matrix, bufferSource,
+                Font.DisplayMode.NORMAL, background, packedLight);
+        poseStack.popPose();
     }
 }