Making An E2 Chip Stay At It's Current World Position

[SkCorps]

Alright, essentially what I want to do is make an E2 chip (that floats over my head) to get its current world position and stay there when I say /stay, and when I say /followme start following me again. I know how to do the chat commands, but the rest puzzles me. How do I do it?

I would also like it to be able to follow a player, for example, /follow PLAYERNAME.

Here's the E2 code, if it helps.

@name Music Chip V2.0
@persist Vector:vector E:entity
#Timers and trails
if(first())
{
    runOnTick(1)
    runOnChat(1)
    
    entity():setTrails(7,1,1,"trails/tube",vec(255,255,255),200)

    Musicplay = 0
}

#If run on game ticks
if(tickClk())
{
if(entity():isConstrained()) {
    E=entity():isConstrainedTo()
    } 
    else {
        E=entity()
        }
Vector=owner():pos()-E:pos()+vec(0,0,100)
E:applyForce(1*(1*Vector+30*$Vector))
}

#When something is said
if(chatClk(owner())){
     Said = owner():lastSaid():lower()
     if(Said:find("/music_disco")){
          Musicplay = 1
          entity():soundPlay(1,0,"music/HL1_song25_REMIX3.mp3")
     }

}


#When something is said
if(chatClk(owner())){
     Said = owner():lastSaid():lower()
     if(Said:find("/music_stillalive")){
          Musicplay = 1
          entity():soundPlay(1,0,"music/portal_still_alive.mp3")
     }
    
if(chatClk(owner())){
     Said = owner():lastSaid():lower()
     if(Said:find("/music_sectorsweep")){
          Musicplay = 1
          entity():soundPlay(1,0,"music/VLVX_song23.mp3")
     }
}

if(chatClk(owner())){
     Said = owner():lastSaid():lower()
     if(Said:find("/music_combinetheme")){
          Musicplay = 1
          entity():soundPlay(1,0,"music/hl2_song15.mp3")
     }
}

if(chatClk(owner())){
     Said = owner():lastSaid():lower()
     if(Said:find("/music_vortalcombat")){
          Musicplay = 1
          entity():soundPlay(1,0,"music/VLVX_song22.mp3")
     }
}

     if(Said:find("/nomusic")){
          Musicplay = 0
          soundStop(1)
      }

}

  if(Said:find("/stay")){

}

[thirty9th]

You're going to need two vectors; one for the current position of the chip and one for the destination.

In the format I see from your code, you'll want something like this; add it to the When something is said section.

if(Said == "/followme"){
        HoverTarget = owner()
        Follow = 1
}

This is the basic format for getting it to follow you.
The " + vec(0,0,100) " will offset it, making it hover just over your head.
The " * 500 " is multiplying the force, making it more responsive to movement. You can tweak this to your liking.

if(Follow){
    Vector1 = entity():pos()
    Vector2 = HoverTarget:pos()
    ForceFinal = (Vector2 - Vector1 + vec(0,0,100)) * 500
 entity():applyForce(ForceFinal + $ForceFinal*5)
}

The format for applyForce to follow something is:

Force = (Destination - CurrentPos) * Multiplier
entity():applyForce(Force + $Force*5)

Following another player is the same concept; you just need to store a player's entity to HoverTarget and that player will become the destination.

Check the wiki, but you'd want to do something that takes the second part of a string, e.g. "/followplayer playername" and uses that to find a player ( findPlayerbyName(playername) ). That will return that player's entity.

[mjmr89]

That code is correct, but I *HIGHLY* recommend using entity():vel() instead of using $something.

[eduardo]

so like make the velocity 0 so it stays in place?

[thirty9th]

No, what Mjmr means, I think, is to use entity():vel() in place of $Force*5 in my last code box above.

These are two separate methods for controlling wobble; one uses the change in force, and the other uses the entity's current velocity.

[mjmr89]

Yep, thats what I mean. It's better than using the delta of the force because in some situations, the force changes (for example, if you wanted to follow a *moving* target). I don't know, it's hard to explain. It's just generally better to only take into consideration the entity you are moving's velocity.

[SkCorps]

Here's my 'stay in place' code so far, unfortunately it doesn't work...

@name Music Chip V3.0
@persist Vector:vector E:entity CurPos:vector
#Timers and trails
Follow = 1
if(first())
{
    runOnTick(1)
    runOnChat(1)
    
    entity():setTrails(7,1,1,"trails/tube",vec(255,255,255),200)
}

#If run on game ticks
if(tickClk())
{
if(entity():isConstrained()) {
    E=entity():isConstrainedTo()
    } 
    else {
        E=entity()
        }

Vector=owner():pos()-E:pos()+vec(0,0,100)
E:applyForce(1*(2*Vector+30*$Vector))
}


#When something is said
if(chatClk(owner())){
     Said = owner():lastSaid():lower()
     if(Said:find("/music_disco")){
        hint("Music: HL1 Disco Remix", 5)
          entity():soundPlay(1,0,"music/HL1_song25_REMIX3.mp3")
     }
}
#When something is said
if(chatClk(owner())){
     Said = owner():lastSaid():lower()
     if(Said:find("/music_stillalive")){
        hint("Music: Still Alive", 5)
          entity():soundPlay(1,0,"music/portal_still_alive.mp3")
     }
if(chatClk(owner())){
     Said = owner():lastSaid():lower()
     if(Said:find("/music_rock")){
        hint("Music: Combine Theme", 5)
          entity():soundPlay(1,0,"music/hl2_song15.mp3")
     }
}
     if(Said:find("/nomusic")){
        hint("Music off", 5)
          soundStop(1)
      }
}
    if(Said:find("/stay")){
        Follow = 0
        hint("Staying at current world position", 5)
        CurPos = E:pos()
    
}
    if(Follow == 0){
        if(tickClk())
{
if(entity():isConstrained()) {
    E=entity():isConstrainedTo()
    } 
    else {
        E=entity()
        }
        E:applyForce(1*(1*CurPos*$CurPos))
}
}

[RabidCrab]

You're running applyForce twice during an execution, once at the top of the code, another at the bottom. Remove the bottom applyForce() and it should work.