Need to detect units facing my unit

Sunchips · Dec 31, 2012

Im trying to make a spell called Radiance that is supposed to burn enemies facing you for X seconds. I need help to detect that they are facing the unit. I want the front to count as a 180 degrees arc from the very front.

Thx in advance

Almia · Dec 31, 2012

Get the location of the unit facing and the unit that has radiance.Then,get the angle between those 2 points.After that,check if the angle is equal the the angle between those 2 points.
The front angle you want is a bit hard.maybe get the angle between those 2 points then check the required angles

rulerofiron99 · Dec 31, 2012

Here's my code for a front-only shield passive.

Actions
Set tempLoc1 = (Position of (DamageEventTarget))
Set tempLoc2 = (Position of (DamageEventSource))
Set Facing = (Facing of (DamageEventTarget))
Set Source = (Angle from tempLoc2 to tempLoc1)
Set Source = (tsSource + 180.00)
If (All Conditions are True) then do (Then Actions) else do (Else Actions)
- If - Conditions
  - Or - Any (Conditions) are true
    - Conditions
      - And - All (Conditions) are true
        
        Conditions
        
        (Facing - Source) Less than or equal to 45.00
        
        (Facing - Source) Greater than or equal to -45.00
        
        (Facing - Source) Greater than or equal to 315.00
    - Then - Actions
      - Set DMGS_Reduction = 0.5
    - Else - Actions
      - Custom script: call RemoveLocation(udg_tempLoc1)
      - Custom script: call RemoveLocation(udg_tempLoc2)

It's the same idea as facing a unit, you just need to change the unit variables and angles around.

I'd be a bit more helpful with my explanation if I didn't just wake up... let me know if you need more help.

EDIT: Fixed indentation.

Sunchips · Dec 31, 2012

Thanks pal will try this out

rulerofiron99 · Dec 31, 2012

My previous post had a indentation typo, attached is exactly what you need.

Enjoy

Maker · Dec 31, 2012

I'd do it like this:

BS3 Copy
- Events
  - Unit - A unit Is attacked
- Conditions
- Actions
  - Set u1 = (Attacking unit)
  - Set u2 = (Attacked unit)
  - Set p1 = (Position of u1)
  - Set p2 = (Position of u2)
  - If (All Conditions are True) then do (Then Actions) else do (Else Actions)
    - If - Conditions
      - (Cos(((Angle from p1 to p2) - (Facing of u2)))) Less than 0.00
      - (Acos((Cos(((Angle from p1 to p2) - (Facing of u2)))))) Greater than 90.00
    - Then - Actions
      - Game - Display to Player Group - Player 1 (Red) the text: Frontstab!
    - Else - Actions
      - Game - Display to Player Group - Player 1 (Red) the text: Backstab!
  - Custom script: call RemoveLocation(udg_p1)
  - Custom script: call RemoveLocation(udg_p2)

This tests if u1 is in front or behind u2.
The conditions are the same, use the one you prefer. The Acos line is in degrees, 90 translates to semicircle. The upper one has range from -1 to 1.

rulerofiron99 · Dec 31, 2012

Maker said:
I'd do it like this:

BS3 Copy

Events

Unit - A unit Is attacked

Conditions

Actions

Set u1 = (Attacking unit)

Set u2 = (Attacked unit)

Set p1 = (Position of u1)

Set p2 = (Position of u2)

If (All Conditions are True) then do (Then Actions) else do (Else Actions)

If - Conditions

(Cos(((Angle from p1 to p2) - (Facing of u2)))) Less than 0.00

(Acos((Cos(((Angle from p1 to p2) - (Facing of u2)))))) Greater than 90.00

Then - Actions

Game - Display to Player Group - Player 1 (Red) the text: Frontstab!

Else - Actions

Game - Display to Player Group - Player 1 (Red) the text: Backstab!

Custom script: call RemoveLocation(udg_p1)

Custom script: call RemoveLocation(udg_p2)

The conditions are the same, use the one you prefer. The Acos line is in degrees, 90 translates to semicircle. The upper one has range from -1 to 1.

Does this work for angles near 0?

When making my script, it bugged near angle 0 when using only the first two conditions.

EDIT: Indeed it does.

Starquizer · Dec 31, 2012

Almia said:
...
The front angle you want is a bit hard.maybe get the angle between those 2 points then check the required angles

I will assume by equal you mean approximately equal, cause it will be very difficult for the two angles to be the same without a trigger setting them.

Sunchips · Jan 2, 2013

Ruler, I used your trigger provided in your map as a base and now it works perfectly as I want

I got rid of the leaks I hope

Radiance Check
- Events
  - Time - Every 1.00 seconds of game time
- Conditions
- Actions
  - Game - Display to (All players) the text: (String(AB_RadianceTimer[1]))
  - Unit Group - Pick every unit in AB_RadianceCasters and do (Actions)
    - Loop - Actions
      - Multiple FunctionsIf (All Conditions are True) then do (Then Actions) else do (Else Actions)
        
        If - Conditions
        
        AB_RadianceTimer[(Player number of (Owner of (Picked unit)))] Greater than (>) 0.00
        
        Then - Actions
        
        Set AB_RadianceTimer[(Player number of (Owner of (Picked unit)))] = (AB_RadianceTimer[(Player number of (Owner of (Picked unit)))] - 1.00)
        
        Set tempLoc1 = (Position of (Picked unit))
        
        Set AB_LocalRadianceCaster = (Picked unit)
        
        Set AB_TempRadTargetGroup = (Units within 200.00 of tempLoc1)
        
        Unit Group - Pick every unit in AB_TempRadTargetGroup and do (Actions)
        
        Loop - Actions
        
        Multiple FunctionsIf (All Conditions are True) then do (Then Actions) else do (Else Actions)
        
        If - Conditions
        
        (Owner of (Picked unit)) Equal to (==) Neutral Hostile
        
        Then - Actions
        
        Set tempLoc2 = (Position of (Picked unit))
        
        Set tempFacing = (Facing of (Picked unit))
        
        Set tempAngle = (Angle from tempLoc2 to tempLoc1)
        
        Multiple FunctionsIf (All Conditions are True) then do (Then Actions) else do (Else Actions)
        
        If - Conditions
        
        Multiple ConditionsOr - Any (Conditions) are true
        
        Conditions
        
        Multiple ConditionsAnd - All (Conditions) are true
        
        Conditions
        
        (tempFacing - tempAngle) Less than or equal to (<=) 90.00
        
        (tempFacing - tempAngle) Greater than or equal to (>=) -90.00
        
        (tempFacing - tempAngle) Greater than or equal to (>=) 270.00
        
        Then - Actions
        
        Unit - Cause AB_LocalRadianceCaster to damage (Picked unit), dealing ((Real((Intelligence of AB_LocalRadianceCaster (Include bonuses)))) x 2.00) damage of attack type Spells and damage type Normal
        
        Else - Actions
        
        Else - Actions
        
        Custom script: call RemoveLocation(udg_tempLoc2)
        
        Else - Actions
        
        Unit Group - Remove (Picked unit) from AB_RadianceCasters
  - Custom script: call RemoveLocation(udg_tempLoc1)
  - Custom script: call DestroyGroup(udg_AB_TempRadTargetGroup)
    - Multiple FunctionsIf (All Conditions are True) then do (Then Actions) else do (Else Actions)
      - If - Conditions
        
        (AB_RadianceCasters is empty) Equal to (==) True
      - Then - Actions
        
        Trigger - Turn off (This trigger)
      - Else - Actions

rulerofiron99 · Jan 2, 2013

Looks good.

Sunchips · Jan 2, 2013

I would rep you but I recently did :/ However thanks so much for your help man

Maker · Jan 2, 2013

The RemoveLocations for loc1 and loc2 are not in correct place, thus it leaks.

rulerofiron99 · Jan 2, 2013

Maker said:
The RemoveLocations for loc1 and loc2 are not in correct place, thus it leaks.

The indentation was messed up when pasting.

Maker · Jan 2, 2013

rulerofiron99 said:
The indentation was messed up when pasting.

Post #9?

rulerofiron99 · Jan 2, 2013

Maker said:
Post #9?

Yes.

As he said, he worked backwards from the trigger in my map, where the leak removals were in the right places. I doubt he would have moved the custom scripts around.

Sunchips · Jan 2, 2013

Hmm no the TheRemove locations work

Need to detect units facing my unit

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