Lag compensation

Content Development NPCs
1

So I’ve been working on lag compensation for like the last 5 days.
Since it’s an interesting subject that I know has to be tackled outside of graal too, I’ve put in more of my might.

I want to show my code because damn I’ve spent five days on it, rewriting it like 4 times. (and nobody will see it otherwise).

This is the weapon (the part ran individually by each player):

// NPC made by 2ndwolf
if (playerenters) {
  toweapons Dummy Thing;
//  this.loop = 10;
  timeout = .05;
}


//this is the showani weapon


if ( timeout  && isweapon ) {

  if(npcs[testnpc(1,1)].save[9] == 0){ //is travelling
    this.loop++;
    this.waittime++;

    if(this.bigsiteration != npcs[testnpc(1,1)].save[4]){
      this.waittime = 0;
  //    this.newloop = this.loop;

  //    this.lags[this.lagindex%5] = this.newloop - this.oldloop;


      this.letlag = 10;  //this shouldn't be hardcoded but oh well
  //    if(this.lagindex<5) this.letlag = 10;
  //    else this.letlag = (this.lags[0]+this.lags[1]+this.lags[2]+this.lags[3]+this.lags[4])/5;

      //this.lagindex++;

      this.difference = {(npcs[testnpc(1,1)].save[2]-npcs[testnpc(1,1)].save[0])/this.letlag,(npcs[testnpc(1,1)].save[3]-npcs[testnpc(1,1)].save[1])/this.letlag};

      this.bigsiteration = npcs[testnpc(1,1)].save[4];

  //  this.oldloop = this.newloop;

    }

    this.dx = npcs[testnpc(1,1)].save[2]-npcs[testnpc(1,1)].save[0]+this.difference[0]*this.waittime;
    this.dy = npcs[testnpc(1,1)].save[3]-npcs[testnpc(1,1)].save[1]+this.difference[1]*this.waittime;
    this.dist = (this.dx^2 + this.dy^2)^0.5;


    this.dir = getdir(this.dx,this.dy);


    if(this.dist < 1){
      callnpc testnpc(1,1),whatnext,;
      this.waittime = 0;
    }
    else {

      this.showanicoords = {npcs[testnpc(1,1)].save[0]+this.difference[0]*this.waittime,npcs[testnpc(1,1)].save[1]+this.difference[1]*this.waittime};
      showani 387,this.showanicoords[0],this.showanicoords[1],this.dir,bartender#v(npcs[testnpc(1,1)].save[5])#v(npcs[testnpc(1,1)].save[6]),;//0,;

      this.textwidth = textwidth(1,arial,,#s(bartender.words));

      showtext 388,this.showanicoords[0]-(this.textwidth/16)/2+1.5,this.showanicoords[1]-1.5,arial,,#s(bartender.words);
      showtext 389,this.showanicoords[0]-(this.textwidth/16)/2+1.5+3/16,this.showanicoords[1]+1.5+3/16,arial,bold,#s(bartender.words);

      changeimgvis 387,1;
      changeimgvis 388,2;
      changeimgvis 389,1;
      changeimgcolors 389,0,0,0,1;

    }




  } else {  //is idle and waiting

    this.showanicoords = { npcs[testnpc(1,1)].save[0] , npcs[testnpc(1,1)].save[1] };
    showani 387,this.showanicoords[0],this.showanicoords[1],this.dir,bartender#v(npcs[testnpc(1,1)].save[5])#v(npcs[testnpc(1,1)].save[6]),;

    this.textwidth = textwidth(1,arial,,#s(bartender.words));

    showtext 388,this.showanicoords[0]-(this.textwidth/16)/2+1.5,this.showanicoords[1]-1.5,arial,,#s(bartender.words);
    showtext 389,this.showanicoords[0]-(this.textwidth/16)/2+1.5+3/16,this.showanicoords[1]+1.5+3/16,arial,bold,#s(bartender.words);

    changeimgvis 387,1;
    changeimgvis 388,2;
    changeimgvis 389,1;
    changeimgcolors 389,0,0,0,1;
  }

  timeout = .05;
}

It can also wait and speak! (Haven’t tested the part where he waits, but since he starts by waiting and has no problem, I assume it works (I know I shouldn’t).

2

Ok so vbulletin wouldn’t parse my french comment and I hsd to leave, will post the full script once I’m back home.

The part ran by the level’s leader: (It’s placed at coordinates 0,0 since the weapon looks for an npc that is at 1,1)

// NPC made by 2ndwolf
if (playerenters) {

this.step = 0;
this.coords = {19,19,19,29,29,29,29,19};
this.speed = 2;

save[0] = 19;      //last synched position (x)
save[1] = 19;      //last synched position (y)
save[2] = save[0]; //next position to synch with (x)
save[3] = save[1]; //next position to synch with (y)
save[4] = 0;       // this script's quantity of iterations
save[5] = 0; //gani - 0 = idle, 1 = walk...
save[6] = 0; //hasbeer

save[9] = 20;  //sleep

timeout = .05;
}

if ( (timeout || whatnext) && isleader) {


  if(save[9]>0){
    //Place npc at given coordinates and make it wait as long as supposed
    save[0] = this.coords[this.step*2];
    save[1] = this.coords[this.step*2+1];
    save[2] = save[0];
    save[3] = save[1];

    save[9]--;

  } else {

    if( this.dist < 1 || whatnext ) {


      if(this.step == arraylen(this.coords)/2-1){
        save[6] = 0;
        this.goingback = 1;
      } else if (this.step==0){
        this.goingback = 0;
        save[6] = 1;
      }

      if(this.goingback==0)this.step++;
      else this.step--;

    }

  }

  if(save[9]<1){
    save[5] = 1;
  //next destination
    this.dx = this.coords[this.step*2] - save[0];
    this.dy = this.coords[this.step*2+1]- save[1];
    this.dist = (this.dx^2 + this.dy^2)^0.5;

    save[0] = save[2];
    save[1] = save[3];

    if(this.dist<this.speed+1){;

      this.dist = 0;
    } else {
      save[2] += (this.dx/this.dist)*this.speed;
      save[3] += (this.dy/this.dist)*this.speed;
    }

//    setplayerprop #c,#v(save[2]),#v(save[3]);


    save[4] += 1;
  }


  timeout.time = save[9] > 0 ? .05 : .5;
  timeout = timeout.time;
}

This morning I tested with Wocky on my level and it seems his npcw desynched after a moment, sending the character in a straight line out of the level.

3

I got super confused before I realized half the script was missing from last post. Or maybe tapatalk is crapping out on me. What exactly is this suppose to do?

4

Compensante lag? Basically make the game less shittier for people that have high latency, and shittier for people that have good connection.

5

wow it’s like socialism for internet quality

6

Yeah, I had a problem with the forums and needed to leave before I could get around it.

For some reason, when a showcharacter npc walks… it becomes erratic if a player in the level has a slow connection.

This chunk of code makes the level’s leader run a script that gives destinations to each player’s npcw that displays a showani. That way, the character is displayed client side and shows at the same place for everyone on the level.

I’d explain further but I don’t have the right words.

7

I get it. I kinda had to do the same thing to get multi-player events to not act shitty.

8

Good implementation. This is what I was talking about with you, but instead of saves, I mentioned level variables.