Polar offset region detection

[RobertMKD]

Hey guys, how do I detect when a certain unit is in a polar offset region of a destructible every 1 second without causing lags?

 

[Dr Super Good]

Since the destructible is static then the region is static. All you need to do is filter incoming units to the region for them matching the "certain unit".

If you mean rect then you will need JASS and to change over to using regions.

 

[RobertMKD]

But there's maybe 1000 destructibles (trees) in my map, if I pick every destructible and check for the unit every 1 sec it's gonna lag horribly.

 

[Dr Super Good]

But there's maybe 1000 destructibles (trees) in my map, if I pick every destructible and check for the unit every 1 sec it's gonna lag horribly.

Which is why you use the "unit enters region" event for the region that is polar offset for each destructible you want to check.

The game should handle regions more efficiently by using scaling area data structures so the performance is likely better than periodically picking units could ever be.

 

[RobertMKD]

Wait, can you post a GUI trigger or something? Cause I don't understand what you're saying.. How can I check when a unit enters the region for each tree?

 

[SAUS]

Is this check necessary for all units? If it is a certain ability, looping over the units with the ability and checking for trees in range might work.

 

[Dr Super Good]

How can I check when a unit enters the region for each tree?

By putting a region for each tree and registering an entry event to a trigger. The code would look something like this.

globals
    rect udg_rect // some rect goes here representing the area around a tree to register.
    region reg_region // not possible in GUI due to lack of region type, you only have rects in GUI
endglobals

function DesEnumRegionAddRect takes nothing returns nothing
    local destructible des = GetEnumDestructable()

    call MoveRectTo(udg_rect, GetDestructableX(des), GetDestructableY(des))
    call RegionAddRect(reg_region, udg_rect)

    set des = null
endfunction

function DestFilterTree takes nothing returns boolean
    local integer dest = GetDestructableTypeId(GetFilterDestructable())
    return dest == '0000' or dest == '0001' // add all tree tests here
endfunction

// use this function like TriggerRegisterEnterRectSimple, takes trigger and the rect area around each tree
function TriggerRegisterEnterRectNearTree takes trigger trig, rect r returns event
    set udg_rect = r
    set reg_region = CreateRegion()
    call EnumDestructablesInRect(bj_mapInitialPlayableArea, Condition(function DestFilterTree), function DesEnumRegionAddRect)
    return TriggerRegisterEnterRegion(trig, reg_region, null)
endfunction

I am unsure how many destructible it can iterate through but hopefully them all. Also I have no experience with regions so cannot be sure if this works (it should, but WC3 is strange at times).

 

[RobertMKD]

Ahh, I do not understand this, if you can give me a GUI version of this trigger, that would be super nice..

 

[Dr Super Good]

if you can give me a GUI version of this trigger

The GUI in WC3 is too limited to support that code. It lacks the required ability to declare functions, use locals, use the "region" type, and actions to manipulate or use regions.

 

[RobertMKD]

Screw it, nevermind, thank you.. +rep

 

[Dr Super Good]

Why do you need to check when units are near trees? Maybe there is a way to achieve what you are after by doing something else.

 

[RobertMKD]

I was trying to detect when the unit enters the shadow of the tree, like to create a region which is a part of the area near the tree..