Homing Circling Projectile

[colinjames12]

I want to make a skill that homes in a projectile at a targeted unit but as it homes in to the target, it moves around the target too. This is my trigger so far but it still doesn't work.

• projectile spell 16
  • Events
    • Unit - A unit Starts the effect of an ability
  • Conditions
    • (Ability being cast) Equal to Spectre Devour
  • Actions
    • Set projectileunit_Copy = (Triggering unit)
    • Set projectilepoint_Copy = (Position of (Triggering unit))
    • Set projectiletarget_Copy = (Position of (Target unit of ability being cast))
    • Set projectiletime_Copy = 5.00
    • Set projectileangle_Copy = (Angle from projectilepoint_Copy to projectiletarget_Copy)
    • Set projectileangle = (Angle from projectilepoint_Copy to projectiletarget_Copy)
    • Special Effect - Create a special effect at projectilepoint_Copy using BlackChakraExplosion.mdx
    • Special Effect - Destroy (Last created special effect)
    • Unit - Create 1 spectre devour for (Owner of (Triggering unit)) at projectilepoint_Copy facing (Facing of (Triggering unit)) degrees
    • Unit Group - Add (Last created unit) to projectilegroup_Copy_15
    • Unit - Add a 5.00 second Generic expiration timer to (Last created unit)
    • Hashtable - Save projectiletime_Copy as 4 of (Key (Last created unit)) in projectilehashtable
    • Hashtable - Save projectileangle_Copy as 5 of (Key (Last created unit)) in projectilehashtable
    • Hashtable - Save Handle Ofprojectileunit_Copy as 6 of (Key (Last created unit)) in projectilehashtable
    • Hashtable - Save Handle Of(Target unit of ability being cast) as 7 of (Key (Last created unit)) in projectilehashtable
    • Unit - Create 1 spectre devour for (Owner of (Triggering unit)) at projectilepoint_Copy facing (Facing of (Triggering unit)) degrees
    • Unit Group - Add (Last created unit) to projectilegroup_Copy_15
    • Unit - Add a 5.00 second Generic expiration timer to (Last created unit)
    • Hashtable - Save projectiletime_Copy as 4 of (Key (Last created unit)) in projectilehashtable
    • Hashtable - Save projectileangle_Copy as 5 of (Key (Last created unit)) in projectilehashtable
    • Hashtable - Save Handle Ofprojectileunit_Copy as 6 of (Key (Last created unit)) in projectilehashtable
    • Hashtable - Save Handle Of(Target unit of ability being cast) as 7 of (Key (Last created unit)) in projectilehashtable
    • Trigger - Turn on projectile spell Copy 16 <gen>
    • Custom script: call RemoveLocation (udg_projectilepoint_Copy)
    • Custom script: call RemoveLocation (udg_projectiletarget_Copy)

• projectile spell Copy 16
  • Events
    • Time - Every 0.03 seconds of game time
  • Conditions
  • Actions
    • Unit Group - Pick every unit in projectilegroup_Copy_15 and do (Actions)
      • Loop - Actions
        • Set projectiletime_Copy = (Load 4 of (Key (Picked unit)) from projectilehashtable)
        • Set projectileangle_Copy = (Load 5 of (Key (Picked unit)) from projectilehashtable)
        • Set projectileunit_Copy = (Load 6 of (Key (Picked unit)) in projectilehashtable)
        • Set projectileunit = (Load 7 of (Key (Picked unit)) in projectilehashtable)
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • (Load 4 of (Key (Picked unit)) from projectilehashtable) Greater than 0.00
          • Then - Actions
            • Set projectiletarget_Copy = (Position of projectileunit)
            • Set projectiletargetpoint_Copy_2 = (Position of (Picked unit))
            • Set projectileangle_Copy = ((Angle from projectiletargetpoint_Copy_2 to projectiletarget_Copy) + projectileangle)
            • Set projectiletargetpoint_Copy_Copy = (projectiletargetpoint_Copy_2 offset by 21.00 towards projectileangle_Copy degrees)
            • Unit - Move (Picked unit) instantly to projectiletargetpoint_Copy_Copy, facing (Facing of (Picked unit)) degrees
            • Set projectileangle = (projectileangle_Copy - 12.00)
            • Set projectiletargetgroup_Copy = (Units within 100.00 of projectiletargetpoint_Copy_Copy matching ((((Matching unit) is A structure) Equal to False) and ((((Matching unit) is alive) Equal to True) and ((((Matching unit) belongs to an ally of (Owner of (Picked unit))) Equal to False) and (((R
            • Unit Group - Pick every unit in projectiletargetgroup_Copy and do (Actions)
              • Loop - Actions
                • Trigger - Turn on spectre devour <gen>
                • Trigger - Turn on spectre devour Copy <gen>
                • Special Effect - Create a special effect at projectiletargetpoint_Copy_2 using BlackChakraExplosion.mdx
                • Special Effect - Destroy (Last created special effect)
                • Special Effect - Create a special effect at projectiletargetpoint_Copy_2 using DarkChakraExplosion.mdx
                • Special Effect - Destroy (Last created special effect)
                • Set spectretime = 6.00
                • Hashtable - Save spectretime as 4 of (Key (Picked unit)) in projectilehashtable
                • Unit Group - Add (Picked unit) to spectregroup
                • Unit - Hide (Picked unit)
                • Unit - Pause (Picked unit)
                • Unit - Create 1 Death Spectre for (Owner of projectileunit_Copy) at projectiletargetpoint_Copy_2 facing (Facing of (Picked unit)) degrees
                • Hashtable - Save Handle Ofspectreunit as 6 of (Key (Picked unit)) in projectilehashtable
                • Unit Group - Add (Last created unit) to spectregroup
                • Unit - Add a 6.00 second Generic expiration timer to (Last created unit)
            • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
              • If - Conditions
                • (Number of units in projectiletargetgroup_Copy) Greater than 0
              • Then - Actions
                • Unit - Remove (Picked unit) from the game
              • Else - Actions
            • Custom script: call DestroyGroup(udg_projectiletargetgroup_Copy)
            • Custom script: call RemoveLocation (udg_projectiletargetpoint_Copy_2)
            • Custom script: call RemoveLocation (udg_projectiletargetpoint_Copy_Copy)
            • Custom script: call RemoveLocation (udg_projectiletarget_Copy)
            • Hashtable - Save (projectiletime_Copy - 0.03) as 4 of (Key (Picked unit)) in projectilehashtable
          • Else - Actions
            • Hashtable - Clear all child hashtables of child (Key (Picked unit)) in projectilehashtable
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • (Load 4 of (Key (Picked unit)) from projectilehashtable) Equal to 0.00
          • Then - Actions
            • Animation - Reset (Picked unit)'s animation
            • Unit Group - Remove (Picked unit) from projectilegroup_Copy_15
            • Unit - Kill (Picked unit)
          • Else - Actions
    • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
      • If - Conditions
        • (Number of units in projectilegroup_Copy_15) Equal to 0
      • Then - Actions
        • Trigger - Turn off (This trigger)
      • Else - Actions
        • Do nothing

Don't mind the other stuffs inside it. All i need to know is the equation for the projectile.

 

[Frotty]

If you do it with an angle, there isn't really much of an equation.
You simply add an angularSpeed, which determines how much the angle can change per update, making the missile not turn instantly.

 

[colinjames12]

Don't worry I got it all figured out. Not exactly the circular angle the projectile I want to go, my new trigger still makes the projectile move in a certain arc.