improve hunger mechanics

include/packets.h

@@ -49,7 +49,7 @@ int sc_teleportEntity (int client_fd, int id, double x, double y, double z, floa
 int sc_setHeadRotation (int client_fd, int id, uint8_t yaw);
 int sc_updateEntityRotation (int client_fd, int id, uint8_t yaw, uint8_t pitch);
 int sc_damageEvent (int client_fd, int id, int type);
-int sc_setHealth (int client_fd, uint8_t health, uint8_t food);
+int sc_setHealth (int client_fd, uint8_t health, uint8_t food, uint16_t saturation);
 int sc_respawn (int client_fd);
 int sc_systemChat (int client_fd, char* message, uint16_t len);
 int sc_entityEvent (int client_fd, int entity_id, uint8_t status);

src/main.c

@@ -243,7 +243,7 @@ void handlePacket (int client_fd, int length, int packet_id, int state) {
         if (player->saturation == 0) {
           if (player->hunger > 0) player->hunger--;
           player->saturation = 200;
-          sc_setHealth(client_fd, player->health, player->hunger);
+          sc_setHealth(client_fd, player->health, player->hunger, player->saturation);
         } else if (player->flags & 0x08) {
           player->saturation -= 1;
         }

src/packets.c

@@ -902,14 +902,14 @@ int sc_damageEvent (int client_fd, int entity_id, int type) {
 }
 
 // S->C Set Health
-int sc_setHealth (int client_fd, uint8_t health, uint8_t food) {
+int sc_setHealth (int client_fd, uint8_t health, uint8_t food, uint16_t saturation) {
 
   writeVarInt(client_fd, 9 + sizeVarInt(food));
   writeByte(client_fd, 0x61);
 
   writeFloat(client_fd, (float)health);
   writeVarInt(client_fd, food);
-  writeFloat(client_fd, 5.0f); // saturation
+  writeFloat(client_fd, (float)(saturation - 200) / 500.0f);
 
   return 0;
 }

src/procedures.c

@@ -248,7 +248,7 @@ void spawnPlayer (PlayerData *player) {
   }
   sc_setHeldItem(player->client_fd, player->hotbar);
   // Sync client health and hunger
-  sc_setHealth(player->client_fd, player->health, player->hunger);
+  sc_setHealth(player->client_fd, player->health, player->hunger, player->saturation);
   // Sync client clock time
   sc_updateTime(player->client_fd, world_time);
 
@@ -479,7 +479,8 @@ uint8_t isColumnBlock (uint8_t block) {
     block == B_short_grass ||
     block == B_dead_bush ||
     block == B_sand ||
-    block == B_torch
+    block == B_torch ||
+    block == B_oak_sapling
   );
 }
 
@@ -635,7 +636,7 @@ uint8_t handlePlayerEating (PlayerData *player, uint8_t just_check) {
   if (*held_count == 0) *held_item = 0;
 
   // Update the client of these changes
-  sc_setHealth(player->client_fd, player->health, player->hunger);
+  sc_setHealth(player->client_fd, player->health, player->hunger, player->saturation);
   sc_entityEvent(player->client_fd, player->client_fd, 9);
   sc_setContainerSlot(
     player->client_fd, 0,
@@ -962,7 +963,7 @@ void hurtEntity (int entity_id, int attacker_id, uint8_t damage_type, uint8_t da
       entity_died = true;
     } else player->health -= damage;
     // Update health on the client
-    sc_setHealth(entity_id, player->health, player->hunger);
+    sc_setHealth(entity_id, player->health, player->hunger, player->saturation);
   } else { // The attacked entity is a mob
     MobData *mob = &mob_data[entity_id - 65536];
     uint8_t mob_health = mob->data & 31;
@@ -1020,16 +1021,17 @@ void handleServerTick (int64_t time_since_last_tick) {
         player_data[i].flagval_16 = 0;
       } else player_data[i].flagval_16 ++;
     }
-    // Heal from saturation
+    // Heal from saturation if player is able and has enough food
-    if (player_data[i].health >= 20) continue;
+    if (player_data[i].health >= 20 || player_data[i].health == 0) continue;
+    if (player_data[i].hunger < 18) continue;
     if (player_data[i].saturation >= 600) {
       player_data[i].saturation -= 600;
       player_data[i].health ++;
-    } else if (player_data[i].hunger > 17) {
+    } else {
       player_data[i].hunger --;
       player_data[i].health ++;
     }
-    sc_setHealth(player_data[i].client_fd, player_data[i].health, player_data[i].hunger);
+    sc_setHealth(player_data[i].client_fd, player_data[i].health, player_data[i].hunger, player_data[i].saturation);
   }
 
   /**