Difference between revisions of "Casting Spells From An Activator"
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This is a short tutorial on how to use activators to cast spells. This will allow you to create more complicated spell effects such as lightning strikes or point blank area of effect spells.[[Image:CallLightning01.jpg|thumb|200px|The script you will be creating]] | |||
This is a short tutorial on how to use activators to cast spells. This will allow you to create more complicated spell effects such as lightning strikes or point blank area of effect spells. | [[Image:CallLightning03.jpg|thumb|200px|Another view]] | ||
By the end of this tutorial you should have a working point blank AoE lightning strike spell. | By the end of this tutorial you should have a working point blank AoE lightning strike spell. | ||
==What you need== | ==What you need== {{Tools|req0=[[The Elder Scrolls Construction Set|Construction Set]]|opt0=[[OBSE]]}} | ||
During this tutorial we will creating the following: | During this tutorial we will be creating the following: | ||
*1 activator object | *1 activator object | ||
*2 spells | *2 spells | ||
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==Create the Activator== | ==Create the Activator== | ||
The first thing we need to do is create | The first thing we need to do is create a new activator object. This object will be used to cast spells. | ||
In the [[Object_Window|Object Window]], Expand the WorldObjects item and select Activator. Rename the activator with the Editor ID "ActivatorFlameNode0" to "SourceID" by slowly double-clicking on it, changing the name, and selecting "Yes" when the menu comes up. | |||
We also need to create a reference of the new activator. In the [[Cell View Window]], select "Interior" from the pull-down menu. Then select the Editor ID "TestQuest01" in the box on the left. Right-click it and select "Duplicate Cell". Rename the cell to something you'll remember and double-click it to open it in the [[Render Window]]. Now, drag your new [[Activator]] "SourceID" to the [[Render Window]]. Double-click on the activator to open the "Reference" window. Name it "Source" in the "Reference Editor ID" box. Mark it as a "Persistent Reference" and "Initially Disabled". | |||
==Create the Spells== | ==Create the Spells== | ||
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===The Self Spell Script=== | ===The Self Spell Script=== | ||
This script uses [[ | This script uses [[MoveTo]] to move your activator to the caster and then uses that activator to [[Cast]] the AOE spell. | ||
Set the <b>Script Type</b> to <b>Magic Effect</b> | |||
<pre> | <pre> | ||
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set me to GetSelf | set me to GetSelf | ||
;set the reference to the activator | |||
set source to YourActivatorsReferenceEditorID | |||
;add 200 to the height so it is above the actor | ;add 200 to the height so it is above the actor | ||
source.MoveTo me 0, 0, 200 | |||
source. | |||
;have the activator cast the AOE spell now | ;have the activator cast the AOE spell now | ||
source.Cast TutCallLightningAoeSpell me | source.Cast TutCallLightningAoeSpell me | ||
End</pre> | End</pre> | ||
===The Area of Effect Spell Script=== | ===The Area of Effect Spell Script=== | ||
This script will be run on every actor that is hit by the TutCallLightningAoeSpell. This script will then | This script will be run on every actor that is hit by the TutCallLightningAoeSpell. This script will then move the activator using [[MoveTo]] and use it to cast a lightning bolt at the affected actor. (Remember: This happens for each actor hit!) | ||
Set the <b>Script Type</b> to <b>Magic Effect</b> | |||
<pre>scriptname TutCallLightningAoeSpellScript | <pre>scriptname TutCallLightningAoeSpellScript | ||
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set me to GetSelf | set me to GetSelf | ||
;set source to the activator | |||
set source to YourActivatorsReferenceEditorID | |||
;add 1000 to the height | ;add 1000 to the height to simulate lightning coming from the sky | ||
source.MoveTo me 0, 0, 1000 | |||
source. | |||
;have the activator cast the lightning spell at the affected actor | ;have the activator cast the lightning spell at the affected actor | ||
source.Cast StandardShockDamageTarget1Novice me | source.Cast StandardShockDamageTarget1Novice me | ||
End</pre> | End</pre> | ||
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==Caveats== | ==Caveats== | ||
*This spell will hit the | *This spell will hit the player as well as everyone around him. This may or may not be what you want. A simple if check directly below the <tt>'''Begin ScriptEffectStart'''</tt> line in the TutCallLightningAoeSpellScript will prevent the spell from hitting the player: | ||
<pre> | |||
... | |||
set me to GetSelf | |||
if me == player | |||
return | |||
endif | |||
...</pre> | |||
<B>Note</B> that a more complicated script is required to achieve this if any actor is able to cast this spell. | |||
<B>Also Note</B> that this version of the spell will not cause aggro when it hits people. The reason for this is the fact that the player does not directly cast a spell at them. It is the activator above the enemy that casts the spell. Because of this the targets of the attack don't become agro at the player because to them it would seem like they were hit by some sort of magical trap. | |||
This problem can be resolved in many ways: | |||
*You could force the target into combat using [[StartCombat]] in TutCallLightningAoeSpellScript, but there are still some problems with that as well. | |||
*Another solution to this problem is to only allow the spell to effect current enemies of the player. | |||
This code can be added directly below the avoid hitting player code in TutCallLightningAoeSpellScript. | |||
<pre> | |||
... | |||
; Only hit people who are in combat with the player | |||
If IsInCombat == 1 | |||
If GetCombatTarget != player | |||
return | |||
endif | |||
else ;If not in combat | |||
return | |||
endif | |||
... | |||
</pre> | |||
This piece of code will prevent the spell from hitting players who are not currently in combat with the player. This changes the nature of the spell some, but does create a more realistic effect stopping the player from being able to damage people without upsetting them. | |||
Other possible solutions include the use of [[GetIsCreature]], [[IsActorEvil]], and [[GetShouldAttack]] | |||
[[Category: Useful Code]] | |||
[[Category: Tutorials]] | [[Category: Tutorials]] | ||
[[Category: Activators]] | [[Category: Activators]] | ||
[[Category: Scripting_Tutorials]] | |||