Defining a cone area.

Geshishouhu · Jan 3, 2014

Hi all, I want to make a cone area spell, just like breath of fire, but I cannot define a cone area to damage the units inside it. Any help, thanks.

Adiktuz · Jan 3, 2014

You can make an increasingly large circle area...

like circle1 has radius of 100, then put circle2 in front of it and use radius of 200 for example and so on...

or there might be scripts for that already

Geshishouhu · Jan 3, 2014

Adiktuz said:
You can make an increasingly large circle area...

like circle1 has radius of 100, then put circle2 in front of it and use radius of 200 for example and so on...

or there might be scripts for that already

But thats a circle, right? I need a cone shape. :/

Adiktuz · Jan 3, 2014

You put it up in front of each other... the end result will be a cone... the sides might not be as straight as a normal cone viewed on 2D, unless you use too many circles though

unless you need the cone in 3D (meaning you include flying height in calculations)...

or you can use thin rects too...

Rects might yield more accurate results but circles will be easier to use since you will use the same definition no matter what direction the cone will go... while if you use rects, the angles will change how you make the rect... you might not even be able to make diagonal rects, in which case, you can only use rects to make the cones if you are facing 0,90,180,270 degrees...

Geshishouhu · Jan 3, 2014

Adiktuz said:
You put it up in front of each other... the end result will be a cone... the sides might not be as straight as a normal cone viewed on 2D, unless you use too many circles though

unless you need the cone in 3D (meaning you include flying height in calculations)...

or you can use thin rects too...

Actually I need some explanation about this thread, I don't get it, my math sucks.... :/
http://www.hiveworkshop.com/forums/triggers-scripts-269/pick-units-cone-shape-212855/

Adiktuz · Jan 3, 2014

that method is well, faster and better unless you don't understand how it goes...

basically you just have 1 circle, pick every unit around it, then check the angle between the tip and the unit, if it's within the angle of the cone, then the unit is inside the cone

IDK if I can explain it in a simpler manner...

Geshishouhu · Jan 3, 2014

Adiktuz said:
that method is well, faster and better unless you don't understand how it goes...

basically you just have 1 circle, pick every unit around it, then check the angle between the tip and the unit, if it's within the angle of the cone, then the unit is inside the cone

IDK if I can explain it in a simpler manner...

Thanks for still being here,

I get this part, just don't know how to get the angles in jass

Adiktuz · Jan 3, 2014

AngleBetweenPoints I think will be what you'll use

or wait... Atan2(x2-x1,y2-y1)

try Atan2(X of tip - X of unit, Y of tip - Y of unit)

then get absolute value... maybe using ((Value^2)^0.5)

then check the angle... I forgot if Atan2 returns degrees or radians

Geshishouhu · Jan 3, 2014

Adiktuz said:
AngleBetweenPoints I think will be what you'll use

or wait... Atan2(x2-x1,y2-y1)

I will try that again.

+Rep

chobibo · Jan 3, 2014

It returns radians.

Adiktuz · Jan 3, 2014

take note though that this is for instant/static cones... if you need it dynamic (like increasing cone), then you will be doing it for a couple of times... starting from using a smaller radius, and increasing it... while keeping the tip position the same...

Geshishouhu · Jan 3, 2014

Adiktuz said:
take note though that this is for instant/static cones... if you need it dynamic (like increasing cone), then you will be doing it for a couple of times... starting from using a smaller radius, and increasing it... while keeping the tip position the same...

Ok, notes taken. Thanks.

Edit: failed actually, maybe I have done something wrong,..... :/

Chaosy · Jan 3, 2014

I dont think you can make it more simple than this

Melee Initialization
- Events
  - Map initialization
- Conditions
- Actions
  - Unit - Create 1 Footman for Player 1 (Red) at (Center of (Playable map area)) facing Default building facing degrees
  - Set u = (Last created unit)
  - Unit Group - Pick every unit in (Units within 250.00 of (Position of u)) and do (Actions)
    - Loop - Actions
      - If (All Conditions are True) then do (Then Actions) else do (Else Actions)
        
        If - Conditions
        
        (Angle from (Position of u) to (Position of (Picked unit))) Less than or equal to ((Facing of u) + 45.00)
        
        (Angle from (Position of u) to (Position of (Picked unit))) Greater than or equal to ((Facing of u) - 45.00)
        
        Then - Actions
        
        Game - Display to (All players) the text: a unit is detected ...
        
        Else - Actions

Geshishouhu · Jan 3, 2014

Chaosy said:
I dont think you can make it more simple than this

Melee Initialization

Events

Map initialization

Conditions

Actions

Unit - Create 1 Footman for Player 1 (Red) at (Center of (Playable map area)) facing Default building facing degrees

Set u = (Last created unit)

Unit Group - Pick every unit in (Units within 250.00 of (Position of u)) and do (Actions)

Loop - Actions

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

If - Conditions

(Angle from (Position of u) to (Position of (Picked unit))) Less than or equal to ((Facing of u) + 45.00)

(Angle from (Position of u) to (Position of (Picked unit))) Greater than or equal to ((Facing of u) - 45.00)

Then - Actions

Game - Display to (All players) the text: a unit is detected ...

Else - Actions

Great! I really need an example. Can you post that map, please?

Or can you convert it to text? I am not familiar with GUI, sorry

Chaosy · Jan 3, 2014

ah didnt know you were a jasser. I might rewrite that a little then. will update this post.

JASS:

function unitgroup takes nothing returns boolean
    if AngleBetweenPoints(GetUnitLoc(udg_u), GetUnitLoc(GetEnumUnit())) <= ( GetUnitFacing(udg_u) + 45.00 )   then
        if AngleBetweenPoints(GetUnitLoc(udg_u), GetUnitLoc(GetEnumUnit())) >= ( GetUnitFacing(udg_u) - 45.00 )  then
            //detected
        else
        return false
        endif
    return false
    endif
    return true
endfunction


function Trig_Melee_Initialization_Actions takes nothing returns nothing
    call CreateNUnitsAtLoc( 1, 'hfoo', Player(0), GetRectCenter(GetPlayableMapRect()), bj_UNIT_FACING )
    set udg_u = GetLastCreatedUnit()
    call ForGroupBJ( GetUnitsInRangeOfLocAll(250.00, GetUnitLoc(udg_u)), function unitgroup )
endfunction

its far from good, but I removed most of the retarded GUIish jass. I am not a jasser myself I only know the basic rules so to speak

chobibo · Jan 3, 2014

Why don't you post your code too Gesh.

Malhorne · Jan 3, 2014

AngleBetweenPoint == Atan2(ty-y,tx-x)

To get a point from a offset of 100 for example :

JASS:

local real angle = Atan2(ty-y, tx-x)
local real point_x = 100*Cos(angle)
local real point_y = 100*Sin(angle)

Remember that mathematical functions take radians and return radians when it comes to angle !

Geshishouhu · Jan 3, 2014

Chaosy said:

ah didnt know you were a jasser. I might rewrite that a little then. will update this post.

JASS:

function unitgroup takes nothing returns boolean
    if AngleBetweenPoints(GetUnitLoc(udg_u), GetUnitLoc(GetEnumUnit())) <= ( GetUnitFacing(udg_u) + 45.00 )   then
        if AngleBetweenPoints(GetUnitLoc(udg_u), GetUnitLoc(GetEnumUnit())) >= ( GetUnitFacing(udg_u) - 45.00 )  then
            //detected
        else
        return false
        endif
    return false
    endif
    return true
endfunction


function Trig_Melee_Initialization_Actions takes nothing returns nothing
    call CreateNUnitsAtLoc( 1, 'hfoo', Player(0), GetRectCenter(GetPlayableMapRect()), bj_UNIT_FACING )
    set udg_u = GetLastCreatedUnit()
    call ForGroupBJ( GetUnitsInRangeOfLocAll(250.00, GetUnitLoc(udg_u)), function unitgroup )
endfunction

its far from good, but I removed most of the retarded GUIish jass. I am not a jasser myself I only know the basic rules so to speak

Thank you for the example,

+Rep

chobibo said:
Why don't you post your code too Gesh.

Actually my code did not work properly.... :/ I made something like this:

JASS:

function DBetweenP takes real x, real y, real x1, real y1 returns real
        return SquareRoot(( x - x1 ) * ( x - x1 ) + ( y- y1 ) * ( y- y1 ))
    endfunction
    
    
    function AAngle takes real x1, real x2, real x3, real y1, real y2, real y3 returns real
        return (DBetweenP(x1,y1,x2,y2)*DBetweenP(x1,y1,x2,y2)+DBetweenP(x1,y1,x3,y3)*DBetweenP(x1,y1,x3,y3)-DBetweenP(x2,y2,x3,y3)*DBetweenP(x2,y2,x3,y3))/(2*(DBetweenP(x1,y1,x2,y2)*DBetweenP(x1,y1,x2,y2)+DBetweenP(x1,y1,x3,y3)*DBetweenP(x1,y1,x3,y3)))
    endfunction

Malhorne said:
AngleBetweenPoint == Atan2(ty-y,tx-x)

To get a point from a offset of 100 for example :

JASS:

local real angle = Atan2(ty-y, tx-x) local real point_x = 100*Cos(angle) local real point_y = 100*Sin(angle)

Remember that mathematical functions take radians and return radians when it comes to angle !

Thanks Malhorne. I tried to make a function myself so that I can get an angle if I know the coordinates of three points, but failed....xD

Maker · Jan 3, 2014

Untitled Trigger 007
- Events
  - Player - Player 1 (Red) skips a cinematic sequence
- Conditions
- Actions
  - Set u1 = Paladin 0003 <gen>
  - Set p1 = (Position of u1)
  - Set plr = (Triggering player)
  - Set r1 = (Facing of u1)
  - Custom script: set bj_wantDestroyGroup = true
  - Unit Group - Pick every unit in (Units within 1000.00 of p1) and do (Actions)
    - Loop - Actions
      - Set u2 = (Picked unit)
      - If (All Conditions are True) then do (Then Actions) else do (Else Actions)
        
        If - Conditions
        
        (u2 is alive) Equal to True
        
        (u2 belongs to an enemy of plr) Equal to True
        
        Then - Actions
        
        Game - Display to Player Group - Player 1 (Red) for 5.00 seconds the text: picked alive
        
        Set p2 = (Position of u2)
        
        If (All Conditions are True) then do (Then Actions) else do (Else Actions)
        
        If - Conditions
        
        (Acos((Cos((r1 - (Angle from p1 to p2)))))) Less than 30.00
        
        Then - Actions
        
        Special Effect - Create a special effect attached to the origin of u2 using Abilities\Weapons\DemolisherFireMissile\DemolisherFireMissile.mdl
        
        Special Effect - Destroy (Last created special effect)
        
        Else - Actions
        
        Custom script: call RemoveLocation(udg_p2)
        
        Else - Actions
  - Custom script: call RemoveLocation(udg_p1)

The r1 can be angle from caster to target point of ability being cast. In jass I would ditch the Acos and modify the 30 to a desired value between -1 and 1.

Geshishouhu · Jan 3, 2014

Maker said:
Untitled Trigger 007

Events

Player - Player 1 (Red) skips a cinematic sequence

Conditions

Actions

Set u1 = Paladin 0003 <gen>

Set p1 = (Position of u1)

Set plr = (Triggering player)

Set r1 = (Facing of u1)

Custom script: set bj_wantDestroyGroup = true

Unit Group - Pick every unit in (Units within 1000.00 of p1) and do (Actions)

Loop - Actions

Set u2 = (Picked unit)

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

If - Conditions

(u2 is alive) Equal to True

(u2 belongs to an enemy of plr) Equal to True

Then - Actions

Game - Display to Player Group - Player 1 (Red) for 5.00 seconds the text: picked alive

Set p2 = (Position of u2)

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

If - Conditions

(Acos((Cos((r1 - (Angle from p1 to p2)))))) Less than 30.00

Then - Actions

Special Effect - Create a special effect attached to the origin of u2 using Abilities\Weapons\DemolisherFireMissile\DemolisherFireMissile.mdl

Special Effect - Destroy (Last created special effect)

Else - Actions

Custom script: call RemoveLocation(udg_p2)

Else - Actions

Custom script: call RemoveLocation(udg_p1)

The r1 can be angle from caster to target point of ability being cast. In jass I would ditch the Acos and modify the 30 to a desired value between -1 and 1.

Thanks Maker. +Rep

Veronnis · Oct 24, 2021

@Maker, thank you! I'm still not quite sure why my way didn't work but yours did!

FeelsGoodMan · Oct 24, 2021

Veronnis said:
@Maker, thank you! I'm still not quite sure why my way didn't work but yours did!

That necro though

Veronnis · Oct 24, 2021

I know its ancient, but thanks is still deserved lol. Unless that's against the rules, I've been away for quite a while.

HerlySQR · Oct 25, 2021

Just to be clear, are all of you reffering a cone or a circular sector? because they are not the same.

FeelsGoodMan · Oct 25, 2021

HerlySQR said:
Just to be clear, are all of you reffering a cone or a circular sector? because they are not the same.

I believe they're talking about a cone like this

Veronnis · Oct 25, 2021

Others may be using this thread for different purposes, but I was just using it to create a "pizza slice" area.

HerlySQR · Oct 25, 2021

This is a cone

Circular sector

Chaosy · Oct 26, 2021

It is common gaming-speak to refer to a "cone attack" as what is described as a circular sector in the above image.

In WoW for example, there is a mage ability called Cone of Cold.

Although this might be because you kinda-sorta shoot a cone outward in front of you. Rotate a cone 90 degree and put the pointy bit by your chest and the cone will seem like a circular section from above.

Defining a cone area.

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