[General] Fix jump synchronization for players

This had been broken by fr3dz10's physics rewrites from the earlier part of the year that made it so dedicated players were always regarded by the movement solver as being on the ground.

apps/openmw/mwbase/world.hpp

@@ -443,6 +443,17 @@ namespace MWBase
                 End of tes3mp addition
             */
 
+            /*
+                Start of tes3mp addition
+
+                Make it possible to set whether a Ptr is on the ground or not, needed for proper
+                synchronization in multiplayer
+            */
+            virtual void setOnGround(const MWWorld::Ptr& ptr, bool onGround) = 0;
+            /*
+                End of tes3mp addition
+            */
+
             /*
                 Start of tes3mp addition
 

apps/openmw/mwmp/DedicatedPlayer.cpp

@@ -64,6 +64,9 @@ DedicatedPlayer::DedicatedPlayer(RakNet::RakNetGUID guid) : BasePlayer(guid)
 
     hasReceivedInitialEquipment = false;
     hasFinishedInitialTeleportation = false;
+
+    isJumping = false;
+    wasJumping = false;
 }
 
 DedicatedPlayer::~DedicatedPlayer()
@@ -209,6 +212,17 @@ void DedicatedPlayer::setAnimFlags()
         isLevitationPurged = false;
     }
 
+    if (isJumping && !wasJumping)
+    {
+        world->setOnGround(ptr, false);
+        wasJumping = true;
+    }
+    else if (wasJumping && !isJumping)
+    {
+        world->setOnGround(ptr, true);
+        wasJumping = false;
+    }
+
     MWMechanics::CreatureStats *ptrCreatureStats = &ptr.getClass().getCreatureStats(ptr);
 
     ptrCreatureStats->setDrawState(static_cast<MWMechanics::DrawState_>(drawState));

apps/openmw/mwmp/DedicatedPlayer.hpp

@@ -85,6 +85,8 @@ namespace mwmp
         bool hasReceivedInitialEquipment;
         bool hasFinishedInitialTeleportation;
         bool isLevitationPurged;
+
+        bool wasJumping;
     };
 }
 #endif //OPENMW_DEDICATEDPLAYER_HPP

apps/openmw/mwmp/LocalPlayer.cpp

@@ -612,7 +612,7 @@ void LocalPlayer::updateAnimFlags(bool forceUpdate)
     bool isForceMoveJumping = ptrNpcStats.getMovementFlag(CreatureStats::Flag_ForceMoveJump);
     
     isFlying = world->isFlying(ptrPlayer);
-    bool isJumping = !world->isOnGround(ptrPlayer) && !isFlying;
+    isJumping = !world->isOnGround(ptrPlayer) && !isFlying;
 
     // We need to send a new packet at the end of jumping, flying and TCL-ing too,
     // so keep track of what we were doing last frame

apps/openmw/mwworld/worldimp.cpp

@@ -1722,6 +1722,21 @@ namespace MWWorld
         End of tes3mp addition
     */
 
+    /*
+        Start of tes3mp addition
+
+        Make it possible to set whether a Ptr is on the ground or not, needed for proper
+        synchronization in multiplayer
+    */
+    void World::setOnGround(const Ptr& ptr, bool onGround)
+    {
+        MWPhysics::Actor* actor = mPhysics->getActor(ptr);
+        actor->setOnGround(onGround);
+    }
+    /*
+        End of tes3mp addition
+    */
+
     /*
         Start of tes3mp addition
 

apps/openmw/mwworld/worldimp.hpp

@@ -517,6 +517,17 @@ namespace MWWorld
                 End of tes3mp addition
             */
 
+            /*
+                Start of tes3mp addition
+
+                Make it possible to set whether a Ptr is on the ground or not, needed for proper
+                synchronization in multiplayer
+            */
+            void setOnGround(const Ptr& ptr, bool onGround);
+            /*
+                End of tes3mp addition
+            */
+
             /*
                 Start of tes3mp addition
 

components/openmw-mp/Base/BasePlayer.hpp

@@ -232,6 +232,7 @@ namespace mwmp
 
         unsigned int movementFlags = 0;
         char drawState;
+        bool isJumping = false;
         bool isFlying = false;
         bool hasTcl = false;
 

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

@@ -12,6 +12,7 @@ void mwmp::PacketPlayerAnimFlags::Packet(RakNet::BitStream *newBitstream, bool s
 
     RW(player->movementFlags, send);
     RW(player->drawState, send);
+    RW(player->isJumping, send);
     RW(player->isFlying, send);
     RW(player->hasTcl, send);
 }