Move Unit Backwards

05-23-2009, 09:52 AM	#1
Linaze	Hey all, I have what I believe is a relatively simple question to ask. Basically what I want is that when a unit enters a certain region, he is automatically moved backwards a certain range. Like I said, backwards, meaning that I'd prefer it if the guy was facing upwards when entering the region, he'd also face upwards when going backwards. I'd prefer a vJass answer, thanks in advance.

05-23-2009, 10:42 AM

Fledermaus

JASS:

//===========================================================================
//Remove these and replace the call with whatever your one is called if you already have these functions
function ProjectX takes real x, real inc, real a returns real
    return x+inc*Cos(a*bj_DEGTORAD)
endfunction
function ProjectY takes real y, real inc, real a returns real
    return y+inc*Sin(a*bj_DEGTORAD)
endfunction
//===========================================================================

function MoveBackwardsConditions takes nothing returns boolean
    //idk if you need any checks
    return true
endfunction

function MoveBackwardsActions takes nothing returns nothing
    local unit u=GetEnteringUnit()
    local real x=GetUnitX(u) //Don't really need this but it makes the SetUnitPosition easier to read
    local real y=GetUnitY(u) // ^
    local real a=GetUnitFacing(u)
    local real inc=200 //however far you want the unit to move, don't really need a variable for this
    
    call SetUnitPosition(u, ProjectX(x, inc, a), ProjectY(y, inc, a)
    
    set u=null
endfunction

//===========================================================================
function InitTrig_MoveBackwards takes nothing returns nothing
    local region SomeRegion=CreateRegion()
    local trigger t=CreateTrigger()
    
    //setup the region here
    
    call TriggerRegisterEnterRegion(t, SomeRegion, Condition(function MoveBackwardsConditions))
    call TriggerAddAction(t, function MoveBackwardsActions)
    
    set t=null
    set SomeRegion=null
endfunction

05-23-2009, 11:03 AM	#3
Linaze	Didn't work, might've been me who failed or it could've been the code. 1st of all, how do I make it check when the unit enters exactly _my_ region, let's just call that region test, right now it seems that part is missing. 2nd of all, I commented out the TriggerRegister... part and ticked the Run @ Map Init box, yet nothing happened.

05-23-2009, 11:49 AM

General Ray

Quote:

1st of all, how do I make it check when the unit enters exactly _my_ region, let's just call that region test, right now it seems that part is missing.

JASS:

function InitTrig_MoveBackwards takes nothing returns nothing
    local region SomeRegion=CreateRegion()
    local trigger t=CreateTrigger()
    
    //setup the region here
    
    call TriggerRegisterEnterRegion(t, SomeRegion, Condition(function MoveBackwardsConditions))
    call TriggerAddAction(t, function MoveBackwardsActions)
    
    set t=null
    set SomeRegion=null
endfunction

"SomeRegion" would be that region.

Quote:

2nd of all, I commented out the TriggerRegister... part and ticked the Run @ Map Init box, yet nothing happened.

If you fill in the missing gaps, this shouldn't be a problem. Why ever would you comment out the trigger register in the first place?

05-23-2009, 12:02 PM	#5
Fledermaus	The trigger needs to be called MoveBackwards, or it wont do the InitTrig function (I think).

05-23-2009, 12:14 PM

Linaze

So "SomeRegion" should be for example: "gg_rct_test"?
EDIT:

JASS:

function ProjectX takes real x, real inc, real a returns real
    return x+inc*Cos(a*bj_DEGTORAD)
endfunction
function ProjectY takes real y, real inc, real a returns real
    return y+inc*Sin(a*bj_DEGTORAD)
endfunction

function MoveBackwardsConditions takes nothing returns boolean
    return true
endfunction

function MoveBackwardsActions takes nothing returns nothing
    local unit u=GetEnteringUnit()
    local real x=GetUnitX(u)
    local real y=GetUnitY(u)
    local real a=GetUnitFacing(u)
    local real inc=200
    
    call SetUnitPosition(u, ProjectX(x, inc, a), ProjectY(y, inc, a))
    
    set u=null
endfunction

function InitTrig_MoveBackwards takes nothing returns nothing
    local region gg_rct_test=CreateRegion()
    local trigger t=CreateTrigger()
    
    call TriggerRegisterEnterRegion(t, gg_rct_test, Condition(function MoveBackwardsConditions))
    call TriggerAddAction(t, function MoveBackwardsActions)
    
    set t=null
    set gg_rct_test=null
endfunction

That's my current code, doesn't do even a shit at the moment.
The trigger is idd called MoveBackwards.

05-23-2009, 12:44 PM

Fledermaus

You haven't set the region up at all. If you are trying to use "Regions" that you create in the main editor window, they are actullay rect's.

JASS:

function InitTrig_MoveBackwards takes nothing returns nothing
    local region someRegion=CreateRegion()
    local trigger t=CreateTrigger()

    call RegionAddRect(someRegion, gg_rct_test) //This will add the "Region" (actually a rect) you created in the editor to the region

    call TriggerRegisterEnterRegion(t, someRegion, Condition(function MoveBackwardsConditions))
    call TriggerAddAction(t, function MoveBackwardsActions)
    
    set t=null
    set someRegion=null
endfunction

05-23-2009, 12:54 PM	#8
General Ray	call RegionAddRect(someRegion, gg_rct_test) Why rct if we're working with rect? I'm not to familiar with the region prefixes.

05-23-2009, 12:58 PM

Fledermaus

Quote:

Originally Posted by General Ray

Why rct if we're working with rect? I'm not to familiar with the region prefixes.

That's what the ones created in the main editor window get called: gg_rct_WHATEVER_NAME_YOU_GIVE_IT

05-23-2009, 01:22 PM

#10

Zerzax

Try to not use unit facing when projecting at angles. Instead, find the angle between GetRectCenterX() and the unit's x and GetRectCenterY() and the unit's y. Or, since rects are rectangular, and you might want to move back not based on a circular pattern but directly to the left or right, you could move back horizontally or vertically depending on whether the unit's x distance is greater than or less than the width of the rectangle.