runtime error: Cannot read 0.strength

ID:264492
 
Jul 31 2009, 3:10 am
Code:
mob
    verb
        Spirit_Gun() // Verb used for firing the beam
            set category = "Techniques"
            set name = "Spirit Gun"
            if(usr.strength <= 5)
                usr<<"You dont have enough power!"
                return
            else // If the firing var isn't 1...
                if(usr.strength >= 6)
                    usr.strength -= 1
                    usr.hp -= 2
                    if(usr.hp<=0)
                        usr.death_check(usr)
                    if(usr.strength<=0)
                        usr.strength = 0
                    usr.firing = 1
                    usr.icon_state="spiritgun"
                    sleep(10)
                    usr.icon_state=""
                    var/obj/spiritgun/K = new /obj/spiritgun
                    K.loc = usr.loc
                    K.dir = usr.dir
                    usr.level_up()
                    K.name="[usr]"
                    walk(K,usr.dir)
                    sleep(600)
                    usr.firing = 0
                    del(K)
                    if (target == null)
                        del(K)
                    usr.random = rand(1,6)
                    if(random == 5||random==1)
                        usr.exp += rand(1,10)
                        usr.level_up()
                    else
                        return
                else
                    usr.random = rand (1,4)
                    if(usr.random == 1||usr.random == 4)
                        usr.strength -= 1
                        usr.hp -= 2
                        if(usr.hp<=0)
                            usr.death_check(usr)
                        if(usr.strength<=0)
                            usr.strength=0
                        usr.firing = 1 
                        usr.icon_state="spiritgun"
                        sleep(10)
                        usr.icon_state=""// Sets the firing var to 1, so he cant fire another beam // Disables the mob's movement
                        var/obj/spiritgun/K = new /obj/spiritgun
                        K.loc = usr.loc
                        usr.level_up()
                        K.dir = usr.dir
                        src.name="[usr]"
                        src.Gowner=usr
                        walk(K,usr.dir)
                        sleep(600)
                        usr.firing = 0
                        del(K)
                        if (target == null)
                            del(K)
                        usr.random = rand(1,6)
                        if(random == 5||random==1)
                            usr.exp += rand(1,10)
                            usr.level_up()
                        else
                            return
                    else
                        usr<<"You failed to use Spirit Gun."



obj
    spiritgun
        icon = 'spirit gun.dmi'
        icon_state = ""
        density = 1
        Bump(A)
            if(ismob(A))
                var/mob/M = A
                if(M.Kaiten||M.sphere)
                    return
                var/damage = round(usr.strength*2)
                if(damage >= 1)
                    M.hp -= damage
                    var/mob/O= usr.Gowner
                    view(M) << "[M] was hit by Spirit Gun for [damage] damage!!"
                    Blood(M.x,M.y,M.z)
                    M.death_check(O)
                del(src)
            if(istype(A,/turf/))
                var/turf/T = A
                if(T.density)
                    del(src)
            if(istype(A,/obj/))
                del(src)


Problem description:

i keep getting this problem no matter wut i do to fix it.
the porblem is:

The gfhxfghgfh (/obj/spiritgun): Bump(the gfhxfghgfh (/mob/charactermenu))
runtime error: Cannot read 0.strength
proc name: Bump (/obj/spiritgun/Bump)
usr: 0
src: The gfhxfghgfh (/obj/spiritgun)
call stack:
.............................................................



its suppose to shoot out the spirit gun. it works fine until the bump and then i get the runtime error. can someone plz help me.
Jul 31 2009, 3:16 am
Sorry, but we do not know which line you refer to. However, I would like to point out that you are using rand() in a terrible way there (before anyone comes onto me about "prob() and rand() being a choice of the user", I'm refering to the fact of using a compile-created var instead of a runtime-created var).
Jul 31 2009, 3:24 am
In response to Demon_F0rce
so wut should i do? and its the bump i guess i dont quite under stand the error
Jul 31 2009, 3:27 am
In response to Cnsdddarrius
Cnsdddarrius wrote:
so wut should i do? and its the bump i guess i dont quite under stand the error


btw i am young_D_Rell to.
Jul 31 2009, 3:31 am
In response to Cnsdddarrius
In the code file, go to:

Build (the tab up the top) > Preferences for [environment name] > and tick the box titled "Generate Debugging Information".

Now, cause the runtime error to happen again. The runtime error will list a code file and line. Go into the code file and push ctrl+g and type in the error line. Now give me said line. Also, could you pleash show me your deathcheck proc, as I think that's gonna be what's causing you some trouble.
Jul 31 2009, 3:35 am
In response to Demon_F0rce
its this

var/damage = round(usr.strength*2)
Jul 31 2009, 3:46 am
In response to Cnsdddarrius
Well does usr.strength exist? What is usr? I've saved you the trouble and did some testing of my own:


usr is 0. src is Demon_F0rce

usr is false. So no, usr.strength does not exist. You might want to try using src. Also, a tip: NEVER use usr in procs. It's not what you think it is. For more information, http://www.byond.com/members/ DreamMakers?command=view_post&post=35932
Jul 31 2009, 3:49 am
In response to Demon_F0rce
but i tried src i keep getting an error saying
src.strength:undefined var
Jul 31 2009, 3:56 am
In response to Cnsdddarrius
That's because I got mixed up with your damn names, since you've set up the projectiles name to be equal to it's shooter. Anyway, I notice you've got a var title Gowner which is set to the usr. If you move the part where you define Gowner as a mob up to the top of Bump(), you can use O.strength instead of usr.strength and it will work fine.
Jul 31 2009, 4:02 am
In response to Demon_F0rce
umm now i have another error.
src.Gowner:undefined var
Jul 31 2009, 4:04 am
In response to Cnsdddarrius
Did you read the error? An undefined var is a var that isn't defined - it doesn't exist.
Jul 31 2009, 4:05 am
In response to Demon_F0rce
but i have Gowner in my vars
Jul 31 2009, 4:07 am
In response to Cnsdddarrius
But is it a var that src can access? Is it defined as obj's var, a mob's var, a turf's var, an area's var, or an atom's var?
Jul 31 2009, 4:10 am
In response to Demon_F0rce
mob var
Jul 31 2009, 4:12 am
In response to Cnsdddarrius
Well what use is it there, when you're trying to use it as an obj var?
Jul 31 2009, 4:15 am
In response to Demon_F0rce
aw kool its fixed thanxs