Implement ranged crits (feature #3703)

CHANGELOG.md

@@ -75,6 +75,7 @@
     Feature #3083: Play animation when NPC is casting spell via script
     Feature #3276: Editor: Search- Show number of (remaining) search results and indicate a search without any results
     Feature #3641: Editor: Limit FPS in 3d preview window
+    Feature #3703: Ranged sneak attack criticals
     Feature #4222: 360° screenshots
     Feature #4256: Implement ToggleBorders (TB) console command
     Feature #4324: Add CFBundleIdentifier in Info.plist to allow for macOS function key shortcuts

apps/openmw/mwmechanics/combat.cpp

@@ -209,8 +209,21 @@ namespace MWMechanics
 
             adjustWeaponDamage(damage, weapon, attacker);
 
-            if(attacker == getPlayer())
+            if (attacker == getPlayer())
+            {
                 attacker.getClass().skillUsageSucceeded(attacker, weaponSkill, 0);
+                const MWMechanics::AiSequence& sequence = victim.getClass().getCreatureStats(victim).getAiSequence();
+
+                bool unaware = !sequence.isInCombat()
+                    && !MWBase::Environment::get().getMechanicsManager()->awarenessCheck(attacker, victim);
+
+                if (unaware)
+                {
+                    damage *= gmst.find("fCombatCriticalStrikeMult")->getFloat();
+                    MWBase::Environment::get().getWindowManager()->messageBox("#{sTargetCriticalStrike}");
+                    MWBase::Environment::get().getSoundManager()->playSound3D(victim, "critical damage", 1.0f, 1.0f);
+                }
+            }
 
             if (victim.getClass().getCreatureStats(victim).getKnockedDown())
                 damage *= gmst.find("fCombatKODamageMult")->getFloat();