Show arms and body parts in first person

This isn't yet fully correct. The arms need to rotate up and down with
the camera, and the mesh's bounding box is causing them to blink out at
certain angles since they don't fit the animation.

apps/openmw/mwrender/npcanimation.cpp

@@ -210,14 +210,6 @@ void NpcAnimation::updateParts(bool forceupdate)
     if(!forceupdate)
         return;
 
-    /* FIXME: Remove this once we figure out how to show what in first-person */
-    if(mViewMode == VM_FirstPerson)
-    {
-        for(size_t i = 0;i < slotlistsize;i++)
-            this->*slotlist[i].mPart = inv.getSlot(slotlist[i].mSlot);
-        return;
-    }
-
     for(size_t i = 0;i < slotlistsize && mViewMode != VM_HeadOnly;i++)
     {
         MWWorld::ContainerStoreIterator store = inv.getSlot(slotlist[i].mSlot);
@@ -316,7 +308,8 @@ void NpcAnimation::updateParts(bool forceupdate)
             bodypartMap[ESM::PRT_Tail] = ESM::BodyPart::MP_Tail;
         }
 
-        sRaceMapping[thisCombination].resize(ESM::PRT_Count, NULL);
+        std::vector<const ESM::BodyPart*> &parts = sRaceMapping[thisCombination];
+        parts.resize(ESM::PRT_Count, NULL);
 
         const MWWorld::ESMStore &store = MWBase::Environment::get().getWorld()->getStore();
         const MWWorld::Store<ESM::BodyPart> &partStore = store.get<ESM::BodyPart>();
@@ -337,11 +330,27 @@ void NpcAnimation::updateParts(bool forceupdate)
                     && bodypart.mId[bodypart.mId.size()-3] == '1'
                     && bodypart.mId[bodypart.mId.size()-2] == 's'
                     && bodypart.mId[bodypart.mId.size()-1] == 't';
-            if (firstPerson != (mViewMode == VM_FirstPerson))
+            if(firstPerson != (mViewMode == VM_FirstPerson))
+            {
+                if(mViewMode == VM_FirstPerson && (bodypart.mData.mPart == ESM::BodyPart::MP_Hand ||
+                                                   bodypart.mData.mPart == ESM::BodyPart::MP_Wrist ||
+                                                   bodypart.mData.mPart == ESM::BodyPart::MP_Forearm))
+                {
+                    /* Allow 3rd person skins as a fallback for the forearms if 1st person is missing. */
+                    for(std::map<int,int>::iterator bIt = bodypartMap.begin();bIt != bodypartMap.end();++bIt)
+                    {
+                        if(bIt->second == bodypart.mData.mPart)
+                        {
+                            if(!parts[bIt->first])
+                                parts[bIt->first] = &*it;
+                        }
+                    }
+                }
                 continue;
-            for (std::map<int, int>::iterator bIt = bodypartMap.begin(); bIt != bodypartMap.end(); ++bIt )
-                if (bIt->second == bodypart.mData.mPart)
-                    sRaceMapping[thisCombination][bIt->first] = &*it;
+            }
+            for(std::map<int,int>::iterator bIt = bodypartMap.begin();bIt != bodypartMap.end();++bIt)
+                if(bIt->second == bodypart.mData.mPart)
+                    parts[bIt->first] = &*it;
         }
     }
 
@@ -484,8 +493,7 @@ void NpcAnimation::addPartGroup(int group, int priority, const std::vector<ESM::
 void NpcAnimation::showWeapons(bool showWeapon)
 {
     mShowWeapons = showWeapon;
-    if(showWeapon &&
-       mViewMode != VM_FirstPerson/* FIXME: Remove this once first-person bodies work */)
+    if(showWeapon)
     {
         MWWorld::InventoryStore &inv = MWWorld::Class::get(mPtr).getInventoryStore(mPtr);
         mWeapon = inv.getSlot(MWWorld::InventoryStore::Slot_CarriedRight);