Follow a character only if they are close

[DiegoHolt]

Hello community, I'm wondering what would be the best way for a character to chase the player but only if the player is near enough. In this case, this character is constantly walking and I need it to start chasing the player when they meet certain distance. I'm trying with coordinates calculations in the room's repeat_execute but things aren't working the way I was expecting.

Any help would be greatly appreciated, since I couldn't find any past topics about this.

[Crimson Wizard]

Please post the code that you are using, then it will be possible to tell what you are doing wrong.

[Khris]

Here's how to get the perspective corrected distance in pixels between two characters:

Code: ags

int DistanceFrom(this Character*, Character* other) {
  float dx = IntToFloat(this.x - other.x), dy = IntToFloat(this.y - other.y) * 1.5; // account for foreshortening
  return FloatToInt(Maths.Sqrt(dx * dx + dy * dy), eRoundNearest);
}

I'm assuming the main issue is that you're calling the FollowCharacter command more than once or something like that.

Code: ags

bool enemy_is_following;

function Room_RepExec() {
  if (!enemy_is_following && cEnemy.DistanceFrom(player) < 50) {
    cEnemy.FollowCharacter(player);
    enemy_is_following = true;
  }
}

And like CW says, please always post your own attempt; this is helpful for us because among other things we can judge how much assistance you need based on what you tried.

[DiegoHolt]

Thanks Khris, I'll try that later. Sorry for not posting the code, but I didn't have any. I deleted it and carried on with other issues of the game.