Help with Multi Target Duration Ability Triggering!

[chadpiety123]

How do i code this ability. I'd really appreciate any algorithm spoonfeeding - just a step by step of what to do. I'm new at using vJass and I hope someone can help me. Thanks! Please be specific.

Duration: 12
Skill Type: Active, Area Targeted, Buff, Debuff, Minor Disable
Casting Range: 800
AoE: 350/400/450/500
Cooldown: 15/12/9/6
Mana Cost: 80/90/100/110
Level 1 - 3% movement speed change, 350 AoE
Level 2 - 6% movement speed change, 400 AoE
Level 3 - 9% movement speed change, 450 AoE
Level 4 - 12% movement speed change, 500 AoE
Framekwork:
Targets with this status gain or lose (allies gain and enemies lose) movement speed whenever they lose mana. The move speed variations lasts 5 seconds and stacks 3 times (refreshes) maximum. Casting this same ability to a target already inflicted refreshes the duration. Furthermore, more especially if possible, this skill should disregard mana reductions from autocasts like Impetus, Searing Arrows and etc. to avoid abuse.

 

[HellCraft]

Try this:
It adds all units affected into 2 groups, an ally group and an enemy group.

• Ability
  • Events
    • Unit - A unit Starts the effect of an ability
  • Conditions
    • (Ability being cast) Equal to Ability
  • Actions
    • Set temploc = (Target point of ability being cast)
    • Set AllyGroup = (Units within (300.00 + (50.00 x (Real((Level of Ability for (Triggering unit)))))) of (Center of (Playable map area)) matching (((Matching unit) belongs to an ally of (Owner of (Triggering unit))) Equal to True))
    • Set EnemyGroup = (Units within (300.00 + (50.00 x (Real((Ability for (Triggering unit)))))) of (Center of (Playable map area)) matching (((Matching unit) belongs to an enemy of (Owner of (Triggering unit))) Equal to True))
    • Countdown Timer - Start Timer as a One-shot timer that will expire in 12.00 seconds
    • Custom script: RemoveLocation(udg_temploc)

This detects when a unit in any of the groups casts a spell, then does the effects. Move Speed Increase and Move Speed Decrease are abilities added to the affected units.

• MS change
  • Events
    • Unit - A unit Starts the effect of an ability
  • Conditions
  • Actions
    • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
      • If - Conditions
        • ((Triggering unit) is in AllyGroup) Equal to True
      • Then - Actions
        • Unit - Add Move Speed Increase to (Triggering unit)
      • Else - Actions
    • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
      • If - Conditions
        • ((Triggering unit) is in EnemyGroup) Equal to True
      • Then - Actions
        • Unit - Add Move Speed Decrease to (Triggering unit)
      • Else - Actions

This removes the units from the group after 12 seconds.

• buff removal
  • Events
    • Time - Timer expires
  • Conditions
  • Actions
    • Unit Group - Pick every unit in AllyGroup and do (Actions)
      • Loop - Actions
        • Unit Group - Remove (Picked unit) from AllyGroup
    • Unit Group - Pick every unit in EnemyGroup and do (Actions)
      • Loop - Actions
        • Unit Group - Remove (Picked unit) from EnemyGroup
    • Custom script: DestroyGroup(udg_AllyGroup)
    • Custom script: DestroyGroup(udg_EnemyGroup)

The only known problem is that this isn't MUI.