Detect Unload vs Un-Defend

[Gnuoy]

Using the un-defend thing inspired from Bribe's system to detect if unit dies to track Ankh cooldowns and stuff. Problem is when unit is unloaded from transport it casts un-defend. Can anyone think of a way to detect if the unit is being unloaded from transport as opposed to dying?

 

[Nichilus]

From testing this on latest version, the undefend is ordered when unit enters transport, not when it leaves it (at least in case of zeppelin).
The 'cast' of Load ability can be detected and there is also an event for when unit enters a transport.
Events are fired in this order:
1. Casting Load

• Zeppelin Load
  • Events
    • Unit - A unit Starts the effect of an ability
  • Conditions
    • (Ability being cast) Equal to Load (Goblin Zeppelin)
  • Actions
    • ...

2. Footman ordered 'undefend'

• Footman Undefend
  • Events
    • Unit - A unit Is issued an order with no target
  • Conditions
    • (Issued order) Equal to (Order(undefend))
  • Actions
    • ...

3. Unit loaded into transport

• Zeppelin Loaded
  • Events
    • Unit - A unit Is loaded into a transport
  • Conditions
  • Actions
    • ...

So what you could do is:
1. When unit casts 'Load', flag the target as 'Being loaded' for example in hashtable
2. When unit casts 'undefend', check the 'Being loaded' flag
3. When unit is actually loaded into the transport, clear the flag (that is mainly to prevent unit boarding the transport with inactive defend already and then falsely evaluation step #2 when unit is ordered 'undefend')

 

[Gnuoy]

Anyone have an idea for distinguishing between un-defending and casting mirror image?

 

[Nichilus]

The mirror image ability is cast before the 'undefend' order, so you can use the "Unit - A unit Starts the effect of an ability" event to detect when unit casts mirror image and flag the unit so that when 'undefend' is ordered, you can safely ignore it.