Need help making special powers

[Aphid98]

@Aphid98 Something is wrong with the key binding. Provide that code please.

here it is: cole.lua

[Blueberrys]

@Aphid98 Err. You can't just pass the component into AddKeyDownHandler.. you need a key and a function. Also, the AddComponent function doesn't return anything, so "breath" is nil.

 

Try something like this.

local function breathe_fire()    -- Call a function within your component here (you need to create it first)    -- inst.components.firebreath:BreatheFire()end-- Binds the key with the function aboveTheInput:AddKeyDownHandler(key, breathe_fire)

-

 

Your firebreath component right now seems like it would fit well on an item, but not a character. You have a function to collect equipped actions, which makes no sense on characters.

I suggest changing it up so it has a function which can be called from the key binding.

function firebreath:BreatheFire()    -- Here, you can shoot a fireball at the direction the character is facing    -- Or find the entity below the cursor, and shoot at it    -- Or whatever you want the "fire breath" to doend

[Aphid98]

@Blueberrys

How would i make it fire at whatever the mouse is over?

[Blueberrys]

@Aphid98 You can get the entity under the mouse using:

local target = TheInput:GetWorldEntityUnderMouse()

And pass that variable to the projectile component's Throw function:

-- Where "self.inst" refers to the player instance.-- Syntax is Projectile:Throw(owner, target, attacker)proj.components.projectile:Throw(self.inst, target, self.inst)

 

Edit: Make sure target isn't nil before you pass it. You might also want to make sure it's an enemy, so you don't go around accidentally shooting rocks and trees (unless you want that, which could make it interesting).

Edited April 8, 2015 by Blueberrys

[Aphid98]

 

@Aphid98 You can get the entity under the mouse using:

local target = TheInput:GetWorldEntityUnderMouse()

And pass that variable to the projectile component's Throw function:

-- Where "self.inst" refers to the player instance.-- Syntax is Projectile:Throw(owner, target, attacker)proj.components.projectile:Throw(self.inst, target, self.inst)

 

Edit: Make sure target isn't nil before you pass it. You might also want to make sure it's an enemy, so you don't go around accidentally shooting rocks and trees (unless you want that, which could make it interesting).

 

like this?firebreath.lua

[Blueberrys]

@Aphid98 Sure, I guess that might work. But you might wanna clean up that code a little. There's a lot of unnecessary and confusing bits in there.
 
Specifically:

• What does the BreatheFire function do?
• Why is LaunchProjectile taking in 2 parameters and completely replacing one of them? ("target")
• CollectEquippedActions is not needed, you can't equip your own firebreath.
• What is OnAttack doing? When will it be called?

Edited April 8, 2015 by Blueberrys

[Aphid98]

@Blueberrys

I have removed CollectEquippedActions,

taken out "target" from the function call,

and removed the OnAttack function.

The idea behind BreatheFire is that it will light things on fire, but i guess that i dont need it because the projectile launch already does that? 

 

[Blueberrys]

@Aphid98 Okay. Make sure you're calling the right function in your key binding, then see if it works.

[Aphid98]

@Aphid98 Okay. Make sure you're calling the right function in your key binding, then see if it works.

it still doesn't work...

log.txt

it still doesn't work...

 

log.txt

[Blueberrys]

@Aphid98 Problem with the key binding again.

...steamapps/common/dont_starve/data/scripts/events.lua:21: table index is nil

What did you pass to the function?

[TheOoKiller]

@Blueberrys

Thanks for the help, now I found new help but still I promise to credit you and also Mobbstar if this mod gets onto Steam Workshop!

 

                    

[Aphid98]

@Blueberrys

I wrote:

 

local prefabs = {}

 

local fn = function(inst)

 

-- choose which sounds this character will play

inst.soundsname = "maxwell"

 

-- a minimap icon must be specified

inst.MiniMapEntity:SetIcon( "wolfgang.png" )

 

-- todo: Add an example special power here.

local function breath_fire()

    inst.components.firebreath:LaunchProjectile()

end

local key = GLOBAL.KEY_G -- See constants.lua for all keys/codes

 

TheInput:AddKeyDownHandler(key, breath_fire)

end

[Blueberrys]

@Aphid98 If this isn't in modmain, remove "GLOBAL". You only need to use the GLOBAL table when accessing global variables from modmain, other scripts already have access to them.

[Aphid98]

@Aphid98 If this isn't in modmain, remove "GLOBAL". You only need to use the GLOBAL table when accessing global variables from modmain, other scripts already have access to them.

i can actually load the world now! But, there is a new error. here is the log and the code:

local fn = function(inst)

 

-- choose which sounds this character will play

inst.soundsname = "maxwell"

 

-- a minimap icon must be specified

inst.MiniMapEntity:SetIcon( "wolfgang.png" )

 

-- todo: Add an example special power here.

local function breath_fire()

    inst.components.firebreath:LaunchProjectile()

end

local key = KEY_G -- See constants.lua for all keys/codes

 

TheInput:AddKeyDownHandler(key, breath_fire)

end

log.txt

[Blueberrys]

@Aphid98

Your log:

...nt_starve/data/../mods/Cole/scripts/prefabs/cole.lua:49: attempt to index field 'firebreath' (a nil value)

I think you forgot to add the firebreath component to your character.

inst:AddComponent("firebreath")

[Aphid98]

 

@Aphid98

Your log:

...nt_starve/data/../mods/Cole/scripts/prefabs/cole.lua:49: attempt to index field 'firebreath' (a nil value)

I think you forgot to add the firebreath component to your character.

inst:AddComponent("firebreath")

I've added it and i got a new error:

here is the log  

log.txt

[Blueberrys]

@Aphid98 Have a look at this guide, it'll help you figure out what's wrong in most of these cases.

 

Your log:

.../data/../mods/Cole/scripts/components/firebreath.lua:21: attempt to index local 'attacker' (a nil value)

See line 21

[Aphid98]

Blueberrys

I'm not sure whats wrong... here is the code:

function firebreath:LaunchProjectile(attacker)

local target = TheInput:GetWorldEntityUnderMouse()

    if self.onprojectilelaunch then

        self.onprojectilelaunch(self.inst, attacker, target)

    end

 

local proj = SpawnPrefab(self.projectile)

if proj and proj.components.projectile then

   proj.Transform:SetPosition(attacker.Transform:GetWorldPosition() )     <---------- bad part

   proj.components.projectile:Throw(self.inst, target, attacker)

end

end

 

Edited April 10, 2015 by Aphid98

[Blueberrys]

@Aphid98 The error message is telling you that "attacker" is nil (empty). Where is the variable coming from? Find out why it's empty at that point.

Hint: Check the parameters

[Aphid98]

Blueberrys

so, attacker is not defined? maybe if i added "inst:AddComponent("attacker")"? 

[Aphid98]

no, because there isn't a component named "attacker"...

[Aphid98]

@Blueberrys

Did it! I needed to type:

function firebreath:LaunchProjectile("cole")

new error though:

.../data/../mods/Cole/scripts/components/firebreath.lua:21: attempt to index field 'Transform' (a nil value)

[Blueberrys]

@Aphid98 Those are both incorrect.

 

"attacker" is a parameter for the LaunchProjectile function. You must pass in a value for the parameter, or it will be blank. Check if you're passing in anything when you are calling the function.

 

Info on variables.

Edited April 10, 2015 by Blueberrys

[Blueberrys]

no, because there isn't a component named "attacker"...

That's correct. The reason that it worked for the previous one is because you are trying to access the component "firebreath". Not all variables work that way, only components. ( "inst.components.some_component" )

[Aphid98]

@Blueberrys

so what about the new error?