[General] Rework PlayerAttribute packets so they are of minimal size

Previously, whenever a single attribute value changed for a player, that player then sent a PlayerAttribute packet with all values for all 8 attributes.

This did not cause anywhere as much packet spam as PlayerSkill used to, but there was no good reason not to fix it as well.

apps/openmw-mp/Player.cpp

@@ -164,6 +164,8 @@ void Player::update()
         packet->setPlayer(basePlayer);
         packet->Send(false);
         packet->Send(true);
+
+        attributeChanges.attributeIndexes.clear();
     }
 
     if (skillsChanged)
@@ -485,6 +487,10 @@ void Player::setAttribute(unsigned short id, int base, int current)
 
     creatureStats.mAttributes[id].mBase = base;
     creatureStats.mAttributes[id].mCurrent = current;
+
+    if (std::find(attributeChanges.attributeIndexes.begin(), attributeChanges.attributeIndexes.end(), id) == attributeChanges.attributeIndexes.end())
+        attributeChanges.attributeIndexes.push_back(id);
+
     attributesChanged = true;
 }
 
@@ -525,6 +531,9 @@ void Player::setSkillIncrease(unsigned short attributeId, int increase)
 
     npcStats.mSkillIncrease[attributeId] = increase;
 
+    if (std::find(attributeChanges.attributeIndexes.begin(), attributeChanges.attributeIndexes.end(), attributeId) == attributeChanges.attributeIndexes.end())
+        attributeChanges.attributeIndexes.push_back(attributeId);
+
     attributesChanged = true;
 }
 

apps/openmw/mwmp/LocalPlayer.cpp

@@ -228,27 +228,24 @@ void LocalPlayer::updateAttributes(bool forceUpdate)
 
     MWWorld::Ptr ptrPlayer = getPlayerPtr();
     const MWMechanics::NpcStats &ptrNpcStats = ptrPlayer.getClass().getNpcStats(ptrPlayer);
-    bool attributesChanged = false;
 
     for (int i = 0; i < 8; ++i)
     {
-        if (ptrNpcStats.getAttribute(i).getBase() != creatureStats.mAttributes[i].mBase)
+        if (ptrNpcStats.getAttribute(i).getBase() != creatureStats.mAttributes[i].mBase ||
+            ptrNpcStats.getSkillIncrease(i) != npcStats.mSkillIncrease[i] ||
+            forceUpdate)
         {
             ptrNpcStats.getAttribute(i).writeState(creatureStats.mAttributes[i]);
-            attributesChanged = true;
-        }
-
-        if (ptrNpcStats.getSkillIncrease(i) != npcStats.mSkillIncrease[i])
-        {
             npcStats.mSkillIncrease[i] = ptrNpcStats.getSkillIncrease(i);
-            attributesChanged = true;
+            attributeChanges.attributeIndexes.push_back(i);
         }
     }
 
-    if (attributesChanged || forceUpdate)
+    if (attributeChanges.attributeIndexes.size() > 0)
     {
         getNetworking()->getPlayerPacket(ID_PLAYER_ATTRIBUTE)->setPlayer(this);
         getNetworking()->getPlayerPacket(ID_PLAYER_ATTRIBUTE)->Send();
+        attributeChanges.attributeIndexes.clear();
     }
 }
 

components/openmw-mp/Base/BasePlayer.hpp

@@ -79,6 +79,14 @@ namespace mwmp
         int type; // 0 - Cell load, 1 - Cell unload
     };
 
+    // Track only the indexes of the attributes that have been changed,
+    // with the attribute values themselves being stored in creatureStats.mAttributes
+    struct AttributeChanges
+    {
+        std::vector<int> attributeIndexes;
+        unsigned int count;
+    };
+
     // Track only the indexes of the skills that have been changed,
     // with the skill values themselves being stored in npcStats.mSkills
     struct SkillChanges
@@ -213,6 +221,7 @@ namespace mwmp
         int day;
         double hour;
 
+        AttributeChanges attributeChanges;
         SkillChanges skillChanges;
 
         SpellbookChanges spellbookChanges;

components/openmw-mp/Packets/Player/PacketPlayerAttribute.cpp

@@ -1,8 +1,5 @@
-//
-// Created by koncord on 08.03.16.
-//
-
 #include "PacketPlayerAttribute.hpp"
+
 #include <components/openmw-mp/NetworkMessages.hpp>
 
 using namespace mwmp;
@@ -16,7 +13,23 @@ void PacketPlayerAttribute::Packet(RakNet::BitStream *bs, bool send)
 {
     PlayerPacket::Packet(bs, send);
 
-    RW(player->creatureStats.mAttributes, send);
+    if (send)
+        player->attributeChanges.count = (unsigned int)(player->attributeChanges.attributeIndexes.size());
+    else
+        player->attributeChanges.attributeIndexes.clear();
+
+    RW(player->attributeChanges.count, send);
+
+    for (unsigned int i = 0; i < player->attributeChanges.count; i++)
+    {
+        int attributeId;
+
+        if (send)
+            attributeId = player->attributeChanges.attributeIndexes.at(i);
+
+        RW(attributeId, send);
 
-    RW(player->npcStats.mSkillIncrease, send);
+        RW(player->creatureStats.mAttributes[attributeId], send);
+        RW(player->npcStats.mSkillIncrease[attributeId], send);
+    }
 }