Item Layer and Mob Overlay Correlation

ID:2302992
 
Oct 7 2017, 7:15 pm
(See the best response by Ter13.)
Code:
proc
    Equip(mob/m, Equipment/item)
        if(item.equipped)
            if(m.equipment["[item.slot_type]"])
                var/Equipment/e = m.equipment["[item.slot_type]"]
                m.overlays -= e.icon
            var/type = null
            if(item.slot_type == "Accessory") 
                type = (m.equipment["Accessory 1"]) ? "Accessory 2" :"Accessory 2"
            
            if(type)
                m.equipment[type] = item 
            else
                m.equipment["[item.slot_type]"] = item
            m.overlays += item.icon
            item.overlays+='Equipped.dmi'
        else
            if(item.type == "Accessory")
                if(m.equipment["Accessory 1"] == item)
                    m.equipment["Accessory 1"] = null
                else
                    m.equipment["Accessory 2"] = null
            else
                m.equipment["[item.slot_type]"] = null
            m.overlays -= item.icon
            item.overlays-='Equipped.dmi'
        item.equipped = !item.equipped


Problem description:

I am trying to make an equipment system which if an item with a lower layer-precedence than any of the items already overlayed on the mob; it'll move itself underneath the equipment. I know that a way to do this would be to re-adjust the overlays every time something is equipped which sounds very inefficient because, I would need to use a for-loop() to do so. Anyone got any suggestions or algorithms I can use because, I don't know what I need to do.
Oct 8 2017, 4:08 am
Icons don't have layers. You need to add the item itself as an overlay, not its icon. I told you this already on the Discord.
Oct 8 2017, 7:21 am
In response to Unwanted4Murder
I didnt understand what you meant but now I understand what you meant. apologies.
Oct 8 2017, 5:15 pm
Best response
Something neat you may not know, is that you can use types as overlays.

obj/item/equipment
    var
        equip_overlay = /overlay/herpyderp
    proc
        Equip()
            overlays += equip_overlay

        Unequip()
            overlays -= equip_overlay

overlay
    parent_type = /obj
    plane = FLOAT_PLANE

    herpyderp
        icon = 'herp.dmi'
        layer = FLOAT_LAYER


For overlays, you want to use FLOAT_LAYER, which is a special value that allows overlays to appear as though they are exactly on the same layer as their parent object.

Any negative layer value is a float layer. Float layers will sort properly amongst themselves so that they never have to be updated or shuffled around by assigning different negative numbers.

-3 will appear below -2, -4 will appear below -3, etc. If you set up your overlays in such a way as to use different negative offsets from one another, you won't have to worry about changing your overlays list at all.
Oct 9 2017, 2:28 pm
In response to Ter13
Get out of here! I helped him for like an hour on the Discord, these are my points! lol

In all seriousness though I didn't know that, pretty neat.
Oct 9 2017, 3:39 pm