Attach events & rotation fix

[Nico8340]

Description

This pull request adds two events each on the server and client side, and corrects the error due to which the rotation of the element does not remain when detaching on the server side.
Closes #3273

Syntax

"onElementAttach", "attachSource, attachOffsetX, attachOffsetY, attachOffsetZ, attachOffsetRX, attachOffsetRY, attachOffsetRZ"
"onElementDetach", "detachSource, detachWorldX, detachWorldY, detachWorldZ, detachWorldRX, detachWorldRY, detachWorldRZ"

"onClientElementAttach", "attachSource, attachOffsetX, attachOffsetY, attachOffsetZ, attachOffsetRX, attachOffsetRY, attachOffsetRZ"
"onClientElementDetach", "detachSource, detachWorldX, detachWorldY, detachWorldZ, detachWorldRX, detachWorldRY, detachWorldRZ"

Example

local myObject = nil
local myObjectModel = 1337

addCommandHandler("cattach",
    function()
        myObject = createObject(myObjectModel, 0, 0, 0)

        if myObject and isElement(myObject) then        
            attachElements(myObject, localPlayer, 2, 2, 2, 5, 5, 5)
        end
    end
)

addCommandHandler("cdetach",
    function()
        if myObject and isElement(myObject) then
            if isElementAttached(myObject) then
                detachElements(myObject)
            end
        end
    end
)

addEventHandler("onClientElementAttach", root,
    function(attachSource, attachOffsetX, attachOffsetY, attachOffsetZ, attachOffsetRX, attachOffsetRY, attachOffsetRZ)
        iprint("onClientElementAttach", source, attachSource, attachOffsetX, attachOffsetY, attachOffsetZ, attachOffsetRX, attachOffsetRY, attachOffsetRZ)
    end
)

addEventHandler("onClientElementDetach", root,
    function(detachSource, detachWorldX, detachWorldY, detachWorldZ, detachWorldRX, detachWorldRY, detachWorldRZ)
        iprint("onClientElementDetach", source, detachSource, detachWorldX, detachWorldY, detachWorldZ, detachWorldRX, detachWorldRY, detachWorldRZ)
    end
)

local myObject = nil
local myObjectModel = 1337

addCommandHandler("sattach",
    function(sourcePlayer)
        myObject = createObject(myObjectModel, 0, 0, 0)

        if myObject and isElement(myObject) then
            attachElements(myObject, sourcePlayer, 2, 2, 2, 5, 5, 5)
        end
    end
)

addCommandHandler("sdetach",
    function(sourcePlayer)
        if myObject and isElement(myObject) then
            if isElementAttached(myObject) then
                detachElements(myObject)
            end
        end
    end
)

addEventHandler("onElementAttach", root,
    function(attachSource, attachOffsetX, attachOffsetY, attachOffsetZ, attachOffsetRX, attachOffsetRY, attachOffsetRZ)
        iprint("onElementAttach", source, attachSource, attachOffsetX, attachOffsetY, attachOffsetZ, attachOffsetRX, attachOffsetRY, attachOffsetRZ)
    end
)

addEventHandler("onElementDetach", root,
    function(detachSource, detachWorldX, detachWorldY, detachWorldZ, detachWorldRX, detachWorldRY, detachWorldRZ)
        iprint("onElementDetach", source, detachSource, detachWorldX, detachWorldY, detachWorldZ, detachWorldRX, detachWorldRY, detachWorldRZ)
    end
)

[TracerDS]

Apply early returns for readability, please

[Nico8340]

I already used early returns in my own modifications, in the previous review I didn't think that you meant to change the returns in the entire function, but I did, now the code is much more readable. @TracerDS

[TracerDS]

Great job 👍

[TheNormalnij]

Rotation fix is good, but it creates a situation when 2 players see one object with 2 different rotations.
We can merge this fix right before the 1.6.1 release to prevent this situation.

[Nico8340]

Rotation fix is good, but it creates a situation when 2 players see one object with 2 different rotations. We can merge this fix right before the 1.6.1 release to prevent this situation.

That's fine with me too.
Would it be good if I put the fix in a separate PR, so that the new events would be usable sooner?

[Nico8340]

That's fine with me too.
Would it be good if I put the fix in a separate PR, so that the new events would be usable sooner?

I realized that this cannot be solved this way, because new events also need the rotation.
I think we have to wait for the release of 1.6.1, please put a tag on this pull request.