How to create Objects with Angle and Distance (GUI/JASS)

[nhocklanhox6]

•What you need
•Ready
•Start
-----------------
•Get Angle
•Get Distance
•Get smallest distance and count

Have you ever met this situation ?...
Sometimes, you're doing something, and to complete it, you need to create an arrow (Just example) but you don't know how to create it and you are lazy to create one by one..
I have a solution to help you:
So...
How to turn this:

Into this:

I/ What you need

So, you need to generate points and turn it into the shape you want

Like this:

You can use anything you want not necessarily the rect. Just know that the point xy.

II/ Ready

Well, you must remember two thing: Angle and Distance, i don't want to tell you what is that..

NOW EXAMPLE:

Suppose i have 4 rect:

• Rect 1: gg_rct_1 (left point)
• Rect 2: gg_rct_2 (up point)
• Rect 3: gg_rct_3 (right point)
• Rect 4: gg_rct_4 (down point)

A/ Get angle

Well, You need to know the angle between the two points for each, but how ?, here's your answer:

-JASS-

local real a = Atan2(GetRectCenterY(gg_rct_4) - GetRectCenterY(gg_rct_2), GetRectCenterX(gg_rct_4) - GetRectCenterX(gg_rct_2))

-GUI-

• Set LEAKS = (Center of 2 <gen>)
• Set LEAKS1 = (Center of 4 <gen>)
• Set Angle = (Angle from LEAKS to LEAKS1)

In this code: you see gg_rct_2 and gg_rct_4, gg_rct_2 is the main point you use for all code to make this arrow.

You're done !

B/ Get distance

You must get the distance between two point too, like this:

-JASS-

local real dx = GetRectCenterX(gg_rct_4) - GetRectCenterX(gg_rct_2) local real dy = GetRectCenterY(gg_rct_4) - GetRectCenterY(gg_rct_2) local real distance = SquareRoot(dx * dx + dy * dy)

-GUI-

• Set Distance = (Distance between LEAKS and LEAKS1)

B/ Get smallest distance and count

IMPORTANT STAGE: You must have count of <effect,unit or stuff> you using to make this arrow, for example, i want to create 20 effect, like this:

-JASS-

local integer i = 20

-GUI-

• Set Count = 20

Now you must get the smallest distance, like this

-JASS-

local real logic = distance/i

-GUI-

• Set MinDistance = (Distance / (Real(Count)))

Now you have the smallest distance , you're done !!!!

C/ START

Now you must write the loop, like this:

-JASS-

local real d = 0.
local real cos = Cos(a)
local real sin = Sin(a)
loop
        exitwhen i == 0
        set x = GetRectCenterX(gg_rct_2) + d * cos
        set y = GetRectCenterY(gg_rct_2) + d * sin
        call AddSpecialEffect("Abilities\\Spells\\Human\\FlameStrike\\FlameStrikeDamageTarget.mdl",x,y)
        set d = d + logic
        set i = i - 1
    endloop

-GUI-

• For each (Integer A) from 1 to Count, do (Actions)
  • Loop - Actions
    • Set DistanceInc = (DistanceInc + MinDistance)
    • Special Effect - Create a special effect at (LEAKS offset by DistanceInc towards Angle degrees) using Abilities\Spells\Human\FlameStrike\FlameStrikeDamageTarget.mdl
• Custom script: call RemoveLocation(udg_LEAKS1)

with

"Abilities\\Spells\\Human\\FlameStrike\\FlameStrikeDamageTarget.mdl" is string model of effect i want to use, d is value increases every i subtract, a is Angle you did the previous.

Here is the results

-JASS-

local integer i = 20
    local real x
    local real y
    local real dx = GetRectCenterX(gg_rct_4) - GetRectCenterX(gg_rct_2)
    local real dy = GetRectCenterY(gg_rct_4) - GetRectCenterY(gg_rct_2)
    local real distance = SquareRoot(dx * dx + dy * dy)
    local real d = 0.
    local real logic = distance/i
    local real a = Atan2(GetRectCenterY(gg_rct_4) - GetRectCenterY(gg_rct_2), GetRectCenterX(gg_rct_4) - GetRectCenterX(gg_rct_2))
    local real cos = Cos(a)
    local real sin = Sin(a)
    //First arrow
    loop
        exitwhen i == 0
        set x = GetRectCenterX(gg_rct_2) + d * cos
        set y = GetRectCenterY(gg_rct_2) + d * sin
        call AddSpecialEffect("Abilities\\Spells\\Human\\FlameStrike\\FlameStrikeDamageTarget.mdl",x,y)
        set d = d + logic
        set i = i - 1
    endloop

-GUI-

• Actions
• Set DistanceInc = 0.00
• Set LEAKS = (Center of 2 <gen>)
• Set LEAKS1 = (Center of 4 <gen>)
• Set Angle = (Angle from LEAKS to LEAKS1)
• Set Distance = (Distance between LEAKS and LEAKS1)
• Set Count = 20
• Set MinDistance = (Distance / (Real(Count)))
• Custom script: call RemoveLocation(udg_LEAKS1)
• For each (Integer A) from 1 to Count, do (Actions)
  • Loop - Actions
    • Set DistanceInc = (DistanceInc + MinDistance)
    • Set LEAKS1 = (LEAKS offset by DistanceInc towards Angle degrees)
    • Special Effect - Create a special effect at LEAKS1 using Abilities\Spells\Human\FlameStrike\FlameStrikeDamageTarget.mdl
    • Custom script: call RemoveLocation(udg_LEAKS1)
• Custom script: call RemoveLocation(udg_LEAKS)

And you do the same with the gg_rct_1 and gg_rct_3

And you will get the arrow like me ^^!

So if the angle and distance change in game, what can i do ??.....

You must do the same thing like that ...

-JASS-

function Trig_Untitled_Trigger_001_Actions takes nothing returns nothing
    local real x = GetUnitX(GetTriggerUnit())
    local real y = GetUnitY(GetTriggerUnit())
    local real o = GetUnitX(GetSpellTargetUnit())
    local real z = GetUnitY(GetSpellTargetUnit())
    local real dx = x-o
    local real dy = y-z
    local real distance = SquareRoot(dx * dx + dy * dy)
    local real angle = Atan2(z - y, o - x)
    local integer i = 20
    local real min = distance/i
    local real m = 0.
    local real cos = Cos(angle)
    local real sin = Sin(angle) 
    loop
        exitwhen i < 0
        set m = m + min
        set o = x+m*cos
        set z = y+m*sin
        call AddSpecialEffect("Abilities\\Spells\\Other\\BreathOfFire\\BreathOfFireDamage.mdl",o,z)
        set i = i - 1
    endloop
endfunction

function a takes nothing returns boolean
    return GetSpellAbilityId() == 'A000'
endfunction

//===========================================================================
function InitTrig_JASS takes nothing returns nothing
    set gg_trg_JASS = CreateTrigger(  )
    call TriggerRegisterAnyUnitEventBJ( gg_trg_JASS, EVENT_PLAYER_UNIT_SPELL_EFFECT )
    call TriggerAddCondition(gg_trg_JASS,Condition(function a))
    call TriggerAddAction( gg_trg_JASS, function Trig_Untitled_Trigger_001_Actions )
endfunction

-GUI-

• Events
  • Unit - A unit Starts the effect of an ability
  • Conditions
    • (Ability being cast) Equal to Special Effect - GUI [W]
  • Actions
    • Set Point = (Position of (Triggering unit))
    • Set Point1 = (Position of (Target unit of ability being cast))
    • Set Angle = (Angle from Point to Point1)
    • Set Distance = (Distance between Point and Point1)
    • Set Count = 20
    • Set Min = (Distance / (Real(Count)))
    • Set M = 0.00
    • Custom script: call RemoveLocation(udg_Point1)
    • For each (Integer A) from 1 to Count, do (Actions)
      • Loop - Actions
        • Set M = (M + Min)
        • Set Point1 = (Point offset by M towards Angle degrees)
        • Special Effect - Create a special effect at Point1 using Abilities\Spells\Other\BreathOfFire\BreathOfFireDamage.mdl
        • Custom script: call RemoveLocation(udg_Point1)
    • Custom script: call RemoveLocation(udg_Point)

And the results is:

 

[Rheiko]

you should detach your signature, onee-san
nice tutorial

 

[Maker]

I would use variables for the Sin and Cos components since they are constant.

 

[Ofel]

Spoiler

[rainbow]Nice![/rainbow]

+Rep

 

[nhocklanhox6]

GUI updated

 

[Rheiko]

Nice onee-san, but why don't you make it leakless?

 

[deathismyfriend]

Don't use integer A/B.
Fix leaks.

It is a nice tutorial though.
There is one thing i would suggest. That is showing people how to make it using a point that can change. Example : center of unit. Then make full arrow from the point of the unit.

 

[chobibo]

I'm bad at math, which is why I want to know where you got the constant 0.01747 from? EDIT: Oh I get it now, it's conversion to radians. Sorry
Also since this is creating a straight line, you could store the computed values on the loop and just increment it.

jass

    local integer i = 20
    local real x
    local real y
    local real dx = GetRectCenterX(gg_rct_4) - GetRectCenterX(gg_rct_2)
    local real dy = GetRectCenterY(gg_rct_4) - GetRectCenterY(gg_rct_2)
    local real distance = SquareRoot(dx * dx + dy * dy)
    local real d = 0.
    local real logic = distance/i
    local real a =Atan2(GetRectCenterY(gg_rct_4) - GetRectCenterY(gg_rct_2), GetRectCenterX(gg_rct_4) - GetRectCenterX(gg_rct_2))
    //First arrow
    
    set dx=logic*Cos(a)
    set dy=logic*Sin(a)
    
    loop
        exitwhen i == 0
        set x = x+dx
        set y = y+dy
        call AddSpecialEffect("Abilities\\Spells\\Human\\FlameStrike\\FlameStrikeDamageTarget.mdl",x,y)
        set i = i - 1
    endloop

 

[Chaosy]

once you master loops this is actually very easy.

 

[nhocklanhox6]

Updated.

 

[chobibo]

Remove the conversion, you don't need it. You're using Atan2, which returns values in radians.

 

[nhocklanhox6]

Remove the conversion, you don't need it. You're using Atan2, which returns values in radians.

It won't work as well if i remove it (Tested)

 

[chobibo]

You must be kidding right?　

jass script

function Trig_Arrow_Actions takes nothing returns nothing
    local integer i = 20
    local real x
    local real y
    local real dx = GetRectCenterX(gg_rct_4) - GetRectCenterX(gg_rct_2)
    local real dy = GetRectCenterY(gg_rct_4) - GetRectCenterY(gg_rct_2)
    local real distance = SquareRoot(dx * dx + dy * dy)
    local real d = 0.
    local real logic = distance/i
    local real a =Atan2(GetRectCenterY(gg_rct_4) - GetRectCenterY(gg_rct_2), GetRectCenterX(gg_rct_4) - GetRectCenterX(gg_rct_2))
    //First arrow
    loop
        exitwhen i == 0
        set x = GetRectCenterX(gg_rct_2) + d * Cos(a)
        set y = GetRectCenterY(gg_rct_2) + d * Sin(a)
        call AddSpecialEffect("Abilities\\Spells\\Human\\FlameStrike\\FlameStrikeDamageTarget.mdl",x,y)
        set d = d + logic
        set i = i - 1
    endloop
    //Seconds arrow
    set i = 10
    set d = 0.
    set dx = GetRectCenterX(gg_rct_1) - GetRectCenterX(gg_rct_2)
    set dy = GetRectCenterY(gg_rct_1) - GetRectCenterY(gg_rct_2)
    set distance = SquareRoot(dx * dx + dy * dy)
    set a = Atan2(GetRectCenterY(gg_rct_1) - GetRectCenterY(gg_rct_2), GetRectCenterX(gg_rct_1) - GetRectCenterX(gg_rct_2))
    set logic = distance/i
    loop
        exitwhen i == 0
        set x = GetRectCenterX(gg_rct_2) + d * Cos(a)
        set y = GetRectCenterY(gg_rct_2) + d * Sin(a)
        call AddSpecialEffect("Abilities\\Spells\\Human\\FlameStrike\\FlameStrikeDamageTarget.mdl",x,y)
        set d = d + logic
        set i = i - 1
    endloop
    //Final Arrow
    set i = 10
    set d = 0.
    set dx = GetRectCenterX(gg_rct_3) - GetRectCenterX(gg_rct_2)
    set dy = GetRectCenterY(gg_rct_3) - GetRectCenterY(gg_rct_2)
    set distance = SquareRoot(dx * dx + dy * dy)
    set a = Atan2(GetRectCenterY(gg_rct_3) - GetRectCenterY(gg_rct_2), GetRectCenterX(gg_rct_3) - GetRectCenterX(gg_rct_2))
    set logic = distance/i
    loop
        exitwhen i == 0
        set x = GetRectCenterX(gg_rct_2) + d * Cos(a)
        set y = GetRectCenterY(gg_rct_2) + d * Sin(a)
        call AddSpecialEffect("Abilities\\Spells\\Human\\FlameStrike\\FlameStrikeDamageTarget.mdl",x,y)
        set d = d + logic
        set i = i - 1
    endloop
endfunction

//===========================================================================
function InitTrig_Arrow takes nothing returns nothing
    set gg_trg_Arrow = CreateTrigger(  )
    call TriggerRegisterTimerEventSingle( gg_trg_Arrow, 0.00 )
    call TriggerAddAction( gg_trg_Arrow, function Trig_Arrow_Actions )
endfunction

 

[nhocklanhox6]

Code

function Trig_Untitled_Trigger_001_Actions takes nothing returns nothing
    local real x = GetUnitX(GetTriggerUnit())
    local real y = GetUnitY(GetTriggerUnit())
    local real o = GetUnitX(GetSpellTargetUnit())
    local real z = GetUnitY(GetSpellTargetUnit())
    local real dx = x-o
    local real dy = y-z
    local real distance = SquareRoot(dx * dx + dy * dy)
    local real angle = Atan2(z - y, o - x)
    local integer i = 20
    local real min = distance/i
    local real m = 0.
    loop
        exitwhen i < 0
        set m = m + min
        set o = x+m*Cos(angle*0.0174532)
        set z = y+m*Sin(angle*0.0174532)
        call AddSpecialEffect("Abilities\\Spells\\Other\\BreathOfFire\\BreathOfFireDamage.mdl",o,z)
        set i = i - 1
    endloop
endfunction

function a takes nothing returns boolean
    return GetSpellAbilityId() == 'A000'
endfunction

//===========================================================================
function InitTrig_JASS takes nothing returns nothing
    set gg_trg_JASS = CreateTrigger(  )
    call TriggerRegisterAnyUnitEventBJ( gg_trg_JASS, EVENT_PLAYER_UNIT_SPELL_EFFECT )
    call TriggerAddCondition(gg_trg_JASS,Condition(function a))
    call TriggerAddAction( gg_trg_JASS, function Trig_Untitled_Trigger_001_Actions )
endfunction

I'm not kidding. Add 57.29582 again and everything return to normal.

 

[chobibo]

Did you look at what I posted? It worked on that map.

EDIT: You didn't read what I posted properly, I suggested you to remove the conversion look at this:

        set o = x+m*Cos(angle*0.0174532)
        set z = y+m*Sin(angle*0.0174532)

Remove those too.

        set o = x+m*Cos(angle)
        set z = y+m*Sin(angle)

 

[nhocklanhox6]

Did you look at what I posted? It worked on that map.

I saw it already, but in my map, did you see that 0.0...

 

[chobibo]

Look at my previous post, yet again.

 

[nhocklanhox6]

Look at my previous post, yet again.

Okay, i get it but, did you see that ?, on my map attachment, it doesn't work as well, until you add 57..... =.=
Excess is better than the lack

 

[PurgeandFire]

As chobibo said, it should work without it. If you think about it, you are first multiplying the angle by 180/pi:
angle * (180 / pi)
And then you are multiplying it by pi / 180 in your Cos and Sin:

Cos( [angle * (180 / pi)] * (pi / 180) )
Sin( [angle * (180 / pi)] * (pi / 180) )

(180 / pi) and (pi / 180) cancel out. It should work. Atan2 returns radians and cos/sin take radians, you don't need a conversion.

Just make sure that you have the angle like this:
local real angle = Atan2(...)
Without a conversion, and then just make the cos/sin parts become Cos(angle) and Sin(angle). (instead of Cos(angle * pi / 180) and Sin(angle * pi / 180))

The tutorial itself is good. As maker said, it is efficient to store Cos(angle) and Sin(angle) as locals, otherwise the loop will perform the functions several times (or even better, you can store m * Cos() and m * Sin()) since it is all constant.

Also, I know it is very pretty to have lots of colors, but I recommend just choosing one for headers (the titles and stuff) and then using regular text for the rest. Otherwise, nice job.

 

[nhocklanhox6]

Sorry, busy in this time ^^!
@PurgeandFire: Updated !

 

[PurgeandFire]

Approved. It is useful. I might fix the grammar/spelling later on, but it is still readable in its current state so I'll approve.

EDIT: I just moved it to the GUI forum, but I added "GUI/JASS" to the title. I also fixed some of the GUI leaks (I forgot to mention them earlier).