1.9 KiB
Spells
Spells consist of a whole lot of information, the most usual way to access them is via their ID. A good tool to use when examining spells and looking into what they will do is QSW which will show you alot of the information available about a spell.
A spell is made up of a lot of parts, on of these are the effects that a spell has, without them spells
wouldn't do much at all since the effects apply different kinds of Auras that do different things
to the target or something else, in the most common scenario that would be to deal damage. If we take
a look at the Frostbolt spell (id 116) in QSW for 1.12.x and scroll down to the Effects heading we will
see that there are 2 effects. The maximum amount of effects on spell can have is 3, these three indexes
are referenced via the EFFECT_INDEX_0, EFFECT_INDEX_1 and EFFECT_INDEX_2 macros.
Lets take a closer look at Effect 0, it has an id of 6 which QSW tells us is named SPELL_EFFECT_APPLY_AURA which tells us that we will apply an Aura with this effect, if we look a few lines down we see that
the Aura Id is 33 which corresponds to SPELL_AURA_MOD_DECREASE_SPEED which is the slowing effect of
our Frostbolt spell. If we look to the right on the same line we see that value=-40 which would mean
that we should decrease the speed by 40%. Knowing what this value means depends on what Aura Id we are
applying, all of them have different meanings for the value and misc values. The periodic variable
tells us whether or not this effect is periodic as in coming back over and over again, this is usual
for some healing spells or DOTs.
The part in the server that handles this is mostly the Aura class and the AuraModifier struct which
is the part we talked about most recently, the one which keeps track of the Aura Id, value, misc and if it's periodic or not.