[Solved] Check if unit is facing the unit

[userid907]

hello, i want to create a spell here is the description :

Thrown an flashbang into a targeted area. make any Heroes, both friends
and enemies, if they are facing towards to the flashbang, they will had a white flash in their screen for 1 Seconds, and slow for X% for 2 seconds. 700 AoE, no effect against any non-hero unit or creeps

see the images to get what i mean

image

 

[Flux]

Pseudocode:

Pick Every Unit within some range
Set FB_Angle = Angle  from FB_Loc to Position of Picked Unit
Set Unit_Facing = Facing Of Picked Unit
Set Difference = FB_Angle - Unit_Facing
If Difference <  -180 then
  Set Difference = Difference + 360
Else
   If Difference > 180 then
      Set Difference = Difference - 360
   Endif
Endif
If Absolute Value(Difference) <= 10 then
    Blind Picked Unit
Endif

You might wanna clear the leaks.

EDIT: Acceptance Angle = 10 in this example

 

[userid907]

so, how to make picked unit if facing the flashbang is blinded?
i dont really know abs

 

[Flux]

What do you mean?

 

[userid907]

i have check it and it dont work properly
here is my whole trigger

• Check
  • Events
    • Unit - A unit Starts the effect of an ability
  • Conditions
    • (Ability being cast) Equal to Check?
  • Actions
    • Unit Group - Pick every unit in (Units within 700.00 of (Target point of ability being cast)) and do (Actions)
      • Loop - Actions
        • Custom script: local player owningPlayer = GetOwningPlayer(GetEnumUnit())
        • Set Real[1] = (Angle from (Target point of ability being cast) to (Position of (Picked unit)))
        • Set Real[2] = (Facing of (Picked unit))
        • Set Real[3] = (Real[1] - Real[2])
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • Real[3] Less than -180.00
          • Then - Actions
            • Set Real[3] = (Real[3] + 360.00)
            • Game - Display to (All players) the text: (String(Real[3]))
          • Else - Actions
            • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
              • If - Conditions
                • Real[3] Greater than 180.00
              • Then - Actions
                • Set Real[3] = (Real[3] - 360.00)
                • Game - Display to (All players) the text: (String(Real[3]))
              • Else - Actions
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • (Abs(Real[3])) Less than or equal to 1000.00
          • Then - Actions
            • Custom script: call CinematicFadeForPlayer(owningPlayer, bj_CINEFADETYPE_FADEIN, 7.0, 100, 100, 100, 0)
            • Game - Display to (All players) the text: (String((Abs(Real[3]))))
            • Game - Display to (All players) the text: ((Name of (Picked unit)) + Is blinded)
          • Else - Actions

 

[IcemanBo]

Check http://www.hiveworkshop.com/forums/...field-view-isunitinsight-isunitbehind-261347/.

 

[Flux]

I made a mistake, Real[1] should be Angle from Position of Picked Unit to Position of FlashBang

 

[Wietlol]

function IsPointInSightOfUnit takes unit observer, real x, real y, real fov returns boolean
        local real face  = GetUnitFacing(observer)
        local real angle = bj_RADTODEG*Atan2(y - GetUnitY(observer), x - GetUnitX(observer))
        return not (RAbsBJ(face - angle) > fov and RAbsBJ(face - angle - 360.) > fov)
    endfunction

Slightly modified the function from the Field of View snippet so you dont need a unit to target.

In GUI, I would rather call this function using a custom script than creating the function in GUI.

• set Unit = (Picked unit)
• set X = X of TempLocation
• set Y = Y of TempLocation
• set Angle = 45
• Custom script: set udg_B = IsPointInSightOfUnit(udg_Unit, udg_X, udg_Y, udg_Angle)
• If
  • B is equal to true
• Then
  • ----- do actions -----

 

[userid907]

ehm, after learning Abs i got this formula and its worked and also searching at google
+REP for who try to help me

• If (All Conditions are True) then do (Then Actions) else do (Else Actions)
  • If - Conditions
    • (Abs(((Facing of (Picked unit)) - (180.00 + (Angle from (Target point of ability being cast) to (Position of (Picked unit))))))) Less than 90.00
  • Then - Actions
    • Custom script: if GetLocalPlayer() == GetOwningPlayer(GetEnumUnit()) then
    • Custom script: call CinematicFadeBJ( bj_CINEFADETYPE_FADEIN, 4, "ReplaceableTextures\\CameraMasks\\White_mask.blp", 100, 100, 100, 0 )
    • Custom script: endif
    • Game - Display to (All players) the text: (Name of (Picked unit))
  • Else - Actions

Edit : oh nuu, i cant give rep to Flux i must spreading rep firstly ~_~

 

[Flux]

^Leak at
Position of Picked Unit.

I don't know how that equation fixed it, but if it works, then I won't bother. Still that equation doesn't make sense, you may encounter problems with it..

 

[Wietlol]

leak at "(Target point of ability being cast)"?

The equation is pretty simple.
He denormalizes the angle between the target and the flash.
Then he checks if the Abs of that result is smaller than 90 degrees.

IIrc, I use that method as well in my Missile System.
However, I am afraid that it wont give proper results in all cases.
I suppose that both Angle between points and facing angle of unit give a result between -179.999 and 180.
There is a problem where that 180+ makes a big problem.

Instead of fixing the formula on a weird way, I suggest you to switch the points in the calculation.
Angle between Flash and Unit -> Angle between Unit and Flash.

(Still both locations should be removed afterwards.)

 

[userid907]

dont worry i can remove leak
that is only the formula to make the flashbang working

thank you, again. wietlol!