Magic Dead Zone

[Delak]

Is their away to script a magic dead zone where no champion can cast a spell? Just a point in the right direction would be good so I can learn more.

thanks
Delak

[JohnWordsworth]

I don't know exactly where you would place this, but I think you can override / hook into some of the Party actions by 'cloning' the Party object in a lua script that is imported in your mod's init.lia script.

A completely untested stab at this would be...

In party.lua (add import 'mod_assets/scripts/party.lua' to mod_assets/scripts/init.lua if it doesn't exist).

SpoilerShow

Code: Select all

cloneObject{
  name = "party",
  baseObject = "party",
  onCastSpell = function(self, champion, spellName)
    if party.level = 1 and party.x > 3 and party.x < 8 and party.y > 3 and party.y < 8 then
      hudPrint("Your magic fails to work here...");
      return false;
    end

    return true;
  end,

This manually checks to see if the party is on level one and in any spaces in the square (4,4) to (7,7). If so, it prints a message to the screen and returns false (so the spell is not cast).

You could obviously check for anything in that function - if they are carrying a certain item, if they are on a given floor, etc.

[Grimwold]

Just tested John's method and it seems to work well... (with a couple of very minor corrections)

Code: Select all

cloneObject{
  name = "party",
  baseObject = "party",
  onCastSpell = function(self, champion, spellName)
    if party.level == 1 and party.x > 3 and party.x < 8 and party.y > 3 and party.y < 8 then
      hudPrint("Your magic fails to work here...");
      return false;
    end

  return true;
  end,
}

[JohnWordsworth]

@Grimwold: Good spot on the equals. I bashed that out on my iPad, and the autocorrect plays havoc when typing out lua code!

[Delak]

Thank you John and Grimwold. I will give this a shoot when I start to build out my first dungeon.

[Wolfrug]

Heya Delak,

I've actually done this myself, so you can just copy-paste my solution. It's based on two things: a lua script from the onCastSpell hook, and a custom object. Here're the entries for objects.lua:

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-- Add the onCastSpell hook and have it run a script called antimagic inside a Lua script entity called checkAntiMagic
cloneObject{
   name = "party",
   baseObject = "party",

   onCastSpell = function(self, spell)
	   local returnValue = checkAntiMagic.antimagic()
       return returnValue
	end,
}

-- Make a custom object that denotes the location of the anti-magic zone: you can use anything, but I used an invisible pressure plate

cloneObject{
	name = "antimagic_zone",
	baseObject = "pressure_plate_hidden",
}

After this, simply add a Lua script entity and name it checkAntiMagic (note the capitalization), and copy-paste in this code:

Code: Select all

function antimagic()
-- Set here the number of levels you want to check for the presence of antimagic_zone objects
local LevelAmount = 5

local returnValue = true
for l=1,LevelAmount do
	for i in allEntities(l) do
		if i.name == "antimagic_zone" then
      		if party.x == i.x and party.y == i.y and party.level == i.level then
				returnValue = false
				hudPrint ("Your spell fizzles! You are standing on an anti-magic zone!")
				break
			end
		end
	end
end
return returnValue

Now you can simply put down the antimagic_zone objects (which are invisible). If the party stands on any such object, all spells will fail to cast. Note that this does not prevent monsters from casting spells - I'm not entirely sure if they are considered to 'cast spells' or more precisely make attacks, so I haven't tried, but presumably something similar could be arranged for them!

Hope that helps!

[Grimwold]

I really liked your idea of antimagic_zone objects, Wolfrug, so I've been working on this a little myself... I thought checking several levels for antimagic zones and checking if the party is there was a bit much though, so I've written a script to use entitiesAt(), to check the parties grid location for an antimagic zone.

Code: Select all

function antimagic(caster,spell)
  for i in entitiesAt(party.level,party.x,party.y) do
    -- hudPrint(i.name .. " with id = " .. i.id)
    if i.name == "antimagic_zone"
    then
      hudPrint(caster:getName() .. "'s spell fizzles! You are standing on an anti-magic zone!")
      return false
    end
  end
  return true
end

[Wolfrug]

@Grimwold

Duh, yes. That's obviously a lot easier and faster. Use that solution instead!

[strangely]

Very useful information. Thanks.

Are there other hooks on the party object that can be overriden like onCastSpell?
I want to create a sword that calls some custom lua code every time a player swings it at a monster.
I can't override onUseItem on a cloned object because that isn't called when the player has the sword in their hand and they swing it at a monster.

[nichg]

You can use onAttack for that. It gives you the attacker and their weapon, which you could check against the name of the item you want to do something weird.