Knockback Help

[killingdyl]

Ok ive searched thehelper.net for a good way to do knockback but everything i found was really really confusing. How do i do it in jass and implement t32? Please please make it as simple as possible. and if you dont know how to implement t32, its ok.

 

[SineCosine]

Uh..
Something like this?

scope KnockBack

     globals
          private constant real KnockBackDistPerSecond = 600.00 //This means that for every one second, 32 ticks, the unit will be knocked back 600 units.. Do modify this..
          private constant real KBPTick = KnockBackDistPerSecond / 32 //Don't modify this, lol
     endglobals

     struct KB

          unit Targ
          real Dist
          integer ticks
          integer MAXticks
          
          real Rad
          real x
          real y

          boolean MakeUnitPaused
          boolean TurnOffPathing
          
          private method periodic takes nothing returns nothing
               local KB k = this

               if k.ticks < k.MAXticks then
                    set k.x = GetUnitX(k.Targ) + KBPTick * Cos(k.Rad)
                    set k.y = GetUnitY(k.Targ) + KBPTick * Sin(k.Rad)

                    call SetUnitPosition(k.Targ, k.x, k.y)
               set k.ticks = k.ticks + 1
               else
                    call k.stopPeriodic()
                    call k.destroy()
               endif
          endmethod

          implement T32x

          static method KBInit takes unit Source, unit Target, real Distance, boolean PauseTheUnit, boolean TurnOffPathingUnit returns nothing
               local KB k = KB.allocate()

               set k.ticks = 1
               set k.Targ = Target
               set k.Dist = Distance
               set k.MAXticks = R2I(Distance / KBPTick) + 1
               set k.x = GetUnitX(k.Targ)
               set k.y = GetUnitY(k.Targ)
               set k.Rad = Atan2(k.y - GetUnitY(Source), k.x - GetUnitX(Source))
               
               set k.MakeUnitPaused = PauseTheUnit
               set k.TurnOffPathing = TurnOffPathingUnit

               if k.MakeUnitPaused == true then
                    call PauseUnit(k.Targ, true)
               endif

               if k.TurnOffPathing == true then
                    call SetUnitPathing(k.Targ, false)
               endif

               call k.startPeriodic()
          endmethod


          method onDestroy takes nothing returns nothing
                    if k.MakeUnitPaused == true then
                         call PauseUnit(k.Targ, false)
                    endif

                    if k.TurnOffPathing == true then
                         call SetUnitPathing(k.Targ, true)
                    endif

               set .Targ = null
          endmethod

     endstruct

endscope

Note: This is un-tested, eh, free-handed =x
So no effects, add them yourself xD

 

[kingkingyyk3]

Your knockback library failed.
-> Does not have collision option.
-> Does not provide stopping interface.
-> Does not use T32_Tick.
-> Does not follow proper naming convention.
-> Does not use constants provided by T32_Tick (Incorrect value with T32 constants will cause it to fail)
-> Does not privatelize struct members. (Naughty users will change the value and cause it to fail)
-> Does not preload Sin/Cos even they are preloadable.
-> Does not follow the rule of friction.

 

[Chaos_Knight]

So can you show us a better one? :thup:

 

[SineCosine]

(He said to make it simple =/ )

Oh, yea..

I guess I could have unit-collision detected..
Stopping interface? o.0 (What's that?)
I also assumed he wouldn't mess with the value 0.03125 =x
Preload as in, [lJASS]set k.SinRad = Sin(Rad)[/lJASS] ? o.0

And what do you mean by friction? o.0
(Do you mean the slowing down of the knock-back?)

 

[kingkingyyk3]

I guess I could have unit-collision detected..
I meant let the user to choose SetUnitX/Y or SetUnitPosition.

Stopping interface? o.0 (What's that?)
call StopKnockback(unit)

Preload as in, set k.SinRad = Sin(Rad) ? o.0
Yes.

(Do you mean the slowing down of the knock-back?)
Yes.

Bingo.

Example : This | This(By Kenny, but i can't find it.)

 

[SineCosine]

In what instances would someone want to intentionally stop a knock-back in progress? o.0

I just saw the system.
Very diverse indeed ._.

I didn't know you could do this:

private struct STH     

     static method Some takes nothing returns nothing
          local Something d = Something.allocate()
          //Stuff
          return d
     endmethod
endstruct

function sth takes nothign returns nothing
     local Something d = 0
     set d = STH.Some()
endfunction

 

[killingdyl]

ok i got it thanks! all i really needed was to see a simple trigger so i could learn. thanks +rep