Scripts/Item: Change Nitro -> Boosts <- to use the correct knockup effect for their backfire. Also, script that knockup effect to work properly ("usually" deploy a rescue parachute).

Port From (https://github.com/TrinityCore/TrinityCore/commit/89006f621e0c59d88ab6102d2c67071aaeeb8ee9)
2020-08-22 15:10:55 -04:00
parent f2cd72aaf6
commit 40330f9bac
3 changed files with 42 additions and 0 deletions
@@ -275,6 +275,7 @@ namespace Scripts.Spells.Items
        //Nitroboots
        public const uint NitroBoostsSuccess = 54861;
        public const uint NitroBoostsBackfire = 46014;
+        public const uint NitroBoostsParachute = 54649;

        //Teachlanguage
        public const uint LearnGnomishBinary = 50242;
@@ -2521,6 +2522,42 @@ namespace Scripts.Spells.Items
        }
    }

+    [Script]
+    class spell_item_nitro_boosts_backfire : AuraScript
+    {
+        public override bool Validate(SpellInfo spell)
+        {
+            return ValidateSpellInfo(SpellIds.NitroBoostsParachute);
+        }
+
+        void HandleApply(AuraEffect effect, AuraEffectHandleModes mode)
+        {
+            lastZ = GetTarget().GetPositionZ();
+        }
+
+        void HandlePeriodicDummy(AuraEffect effect)
+        {
+            PreventDefaultAction();
+            float curZ = GetTarget().GetPositionZ();
+            if (curZ < lastZ)
+            {
+                if (RandomHelper.randChance(80)) // we don't have enough sniffs to verify this, guesstimate
+                    GetTarget().CastSpell(GetTarget(), SpellIds.NitroBoostsParachute, true, null, effect);
+                GetAura().Remove();
+            }
+            else
+                lastZ = curZ;
+        }
+
+        public override void Register()
+        {
+            OnEffectApply.Add(new EffectApplyHandler(HandleApply, 1, AuraType.PeriodicTriggerSpell, AuraEffectHandleModes.Real));
+            OnEffectPeriodic.Add(new EffectPeriodicHandler(HandlePeriodicDummy, 1, AuraType.PeriodicTriggerSpell));
+        }
+
+        float lastZ = MapConst.InvalidHeight;
+    }
+    
    [Script]
    class spell_item_teach_language : SpellScript
    {