EQEmulator Forums - New EVENT_CASTED

I have implemented this event to be able to create quests like "go heal this NPC", "go buff this NPC", potentially it could be used to implement a special spell or proc harming an NPC (if the spell is cast on this specific NPC, then some harm is done). This event is received by an NPC each time a spell is cast on him, and it is passed the identity of the caster (usually a PC) and the ID of the casted spell in variable "$spell_id".
Note that it is triggered before any resist or invulnerability is checked. The spell hits the NPC, that is it.

BE CAREFUL : it means an event is fired each tme a spell is cast on an NPC. I have no idea how much CPU overload this can cause. If this proves useless for "Live".like servers and a performance-hog may be this post should be moved to the "Custom" section.

Here is how it is implemented (as an SVN diff from version 1102) :

Code:

Index: hero-emulator/zone/event_codes.h

===================================================================

--- hero-emulator/zone/event_codes.h    (revision 135)

+++ hero-emulator/zone/event_codes.h    (working copy)

@@ -23,6 +23,7 @@

        EVENT_ZONE,                     //pc only

        EVENT_LEVEL_UP,         //pc only

        EVENT_KILLED_MERIT,     //received by an NPC once for every PC having merit (would receive XP if mob were not green) to kill the NPC -

basically all the group

+       EVENT_CASTED_ON,        //received by an NPC when a spell is cast on him (whether it sticks, is invuln'd etc or not, when the spell hit

s)



        _LargestEventID

 } QuestEventID;

Code:

Index: hero-emulator/zone/embparser.cpp

===================================================================

--- hero-emulator/zone/embparser.cpp    (revision 135)

+++ hero-emulator/zone/embparser.cpp    (working copy)

@@ -57,7 +57,8 @@

        "EVENT_LOOT",

        "EVENT_ZONE",

        "EVENT_LEVEL_UP",

-       "EVENT_KILLED_MERIT"

+       "EVENT_KILLED_MERIT",

+       "EVENT_CASTED_ON"

 };



 PerlembParser::PerlembParser(void) : Parser()

@@ -494,6 +495,11 @@

                        break;

                }



+               case EVENT_CASTED_ON:{

+                       ExportVar(packagename.c_str(), "spell_id", data);

+                       break;

+               }

+

                //nothing special about these events

                case EVENT_DEATH:

                case EVENT_SPAWN:

Code:

Index: hero-emulator/zone/spells.cpp

===================================================================

--- hero-emulator/zone/spells.cpp       (revision 132)

+++ hero-emulator/zone/spells.cpp       (working copy)

@@ -2259,6 +2259,13 @@

 // end of action packet





+       /* Send the EVENT_CASTED_ON event */

+       if(spelltar->IsNPC())

+       {       char temp1[100];

+               sprintf(temp1, "%d", spell_id);

+               parse->Event(EVENT_CASTED_ON, spelltar->GetNPCTypeID(), temp1, spelltar->CastToNPC(), this);

+       }

+

        // solar: now check if the spell is allowed to land



        // invuln mobs can't be affected by any spells, good or bad

Finally an example on how to use it :

Code:

# a_defective_cleaner

sub EVENT_CASTED_ON

{ if($spell_id == 202)

  { quest::setglobal("DefectiveCleanersBuffed", 1, 5, "F"); }

}



sub EVENT_ITEM

{ plugin::return_items(\%itemcount);

}