UpdateHealthPacket

protocol/src/main/java/mc/protocol/State.java

@@ -60,8 +60,8 @@ public enum State {
 					JoinGamePacket.class, 0x23,
 					PlayerAbilitiesPacket.class,0x2C,
 					SPlayerPositionAndLookPacket.class, 0x2F,
-					SpawnPositionPacket.class, 0x46,
-					TimeUpdatePacket.class, 0x47
+					UpdateHealthPacket.class, 0x41,
+					SpawnPositionPacket.class, 0x46
 			)
 	);
 

protocol/src/main/java/mc/protocol/packets/server/TimeUpdatePacket.java

@@ -1,45 +0,0 @@
-package mc.protocol.packets.server;
-
-import lombok.Data;
-import mc.protocol.io.NetByteBuf;
-import mc.protocol.packets.ServerSidePacket;
-
-/**
- * Обновление времени суток.
- *
- * <p>Структура пакета</p>
- * <pre>
- * | FIELD       | TYPE | NOTES                                  |
- * |-------------|------|----------------------------------------|
- * | World Age   | Long | Время жизни мира. В тиках (tick)       |
- * | Time of day | Long | Суточное время в тиках (tick), 0-24000 |
- * </pre>
- *
- * <p>
- *     Каждую секунду происходит 20 тиков.
- *     В игровых сутках 24000 тиков, т.е. игровые сутки в Minecraft длятся 20 минут.
- *     В Vanilla сервере значение "Time of day" увеличивается на 20 единиц каждую секунду.
- * </p>
- *
- * <p>Временные промежутки:</p>
- * <ul>
- *     <li>0 - восход солнца</li>
- *     <li>6000 - полдень</li>
- *     <li>12000 - закат</li>
- *     <li>18000 - полночь</li>
- * </ul>
- *
- * @see <a href="https://wiki.vg/index.php?title=Protocol&oldid=14204#Time_Update">Time Update</a>
- */
-@Data
-public class TimeUpdatePacket implements ServerSidePacket {
-
-	private long worldAge;
-	private long timeOfDay;
-
-	@Override
-	public void writeSelf(NetByteBuf netByteBuf) {
-		netByteBuf.writeLong(this.worldAge);
-		netByteBuf.writeLong(this.timeOfDay);
-	}
-}

protocol/src/main/java/mc/protocol/packets/server/UpdateHealthPacket.java

@@ -0,0 +1,35 @@
+package mc.protocol.packets.server;
+
+import lombok.Data;
+import mc.protocol.io.NetByteBuf;
+import mc.protocol.packets.ServerSidePacket;
+
+/**
+ * Update Health Packet.
+ *
+ * <p>Структура пакета</p>
+ * <pre>
+ * | FIELD           | TYPE   | NOTES                            |
+ * |-----------------|--------|----------------------------------|
+ * | Health          | Float  | 0 = смерть; 20 = полное здоровье |
+ * | Food            | VarInt | 0-20                             |
+ * | Food Saturation | Float  | 0-5                              |
+ * </pre>
+ *
+ * @see <a href="https://wiki.vg/index.php?title=Protocol&oldid=14204#Update_Health">Update Health</a>
+ * @see <a href="https://minecraft.fandom.com/wiki/Food#Hunger_and_saturation">Food: Hunger and saturation</a>
+ */
+@Data
+public class UpdateHealthPacket implements ServerSidePacket {
+
+	private float health;
+	private int food;
+	private float foodSaturation;
+
+	@Override
+	public void writeSelf(NetByteBuf netByteBuf) {
+		netByteBuf.writeFloat(this.health);
+		netByteBuf.writeVarInt(this.food);
+		netByteBuf.writeFloat(this.foodSaturation);
+	}
+}

server/src/main/java/mc/server/PacketHandler.java

@@ -127,21 +127,25 @@ public class PacketHandler {
 
 		// -- Эксперименты -- //
 
-		var timeUpdatePacket = new TimeUpdatePacket();
-		timeUpdatePacket.setWorldAge(0);
-		timeUpdatePacket.setTimeOfDay(0);
+		var updateHealthPacket = new UpdateHealthPacket();
+		updateHealthPacket.setHealth(0.1f);
+		updateHealthPacket.setFood(0);
+		updateHealthPacket.setFoodSaturation(5.0f);
+
+		context.sendNow(updateHealthPacket);
 
 		while (true) {
-			context.sendNow(timeUpdatePacket);
+			context.sendNow(updateHealthPacket);
 
-			timeUpdatePacket.setTimeOfDay(timeUpdatePacket.getTimeOfDay() + 20);
-			if (timeUpdatePacket.getTimeOfDay() >= 24_000) {
-				timeUpdatePacket.setWorldAge(timeUpdatePacket.getWorldAge() + 1);
-				timeUpdatePacket.setTimeOfDay(0);
+			updateHealthPacket.setHealth(updateHealthPacket.getHealth() + 1.0f);
+			updateHealthPacket.setFood(updateHealthPacket.getFood() + 1);
+			if (updateHealthPacket.getHealth() > 20.0f) {
+				updateHealthPacket.setHealth(0.1f);
+				updateHealthPacket.setFood(0);
 			}
 
 			try {
-				TimeUnit.MILLISECONDS.sleep(5);
+				TimeUnit.MILLISECONDS.sleep(50);
 			} catch (InterruptedException e) {
 				break;
 			}