Count entities?

[Stealth Kill]

Are there any ways to count entities with same classname or team number in qc?

[CocoT]

I think you can probably do that by adding/calling a check in PlaceItem() (in items.qc), something like

if (self.classname == "blablabla") blablablanumber = blablablanumber + 1;

somewhere at the beginning at the routine...
I think it's how I did it when I wanted to count the number of pickable quads in Quad Hunt.

[frag.machine]

From the top of my head (untested, so is very likely to have some naive bug lying around):

Code: Select all

float CountEntities (string name) =
{
  local float total = 0;
  local entity ent;

  ent = find (world, classname, name);
  while (ent != world) {
    total = total + 1;
    ent = find (ent, classname, name);
  }

  return total;
}


[Lardarse]

From the top of my head (untested, so is very likely to have some naive bug lying around):

Code: Select all

float CountEntities (string name) =
{
  local float total = 0;
  local entity ent;

  ent = find (world, classname, name);
  while (ent != world) {
    total = total + 1;
    ent = find (ent, classname, name);
  }

  return total;
}

That looks pretty clean, except that your declaration of total will make it a constant. QC will initialize variables to an appropriate 0 (0 for floats, '0 0 0' for vectors, world for entities (think of them as "pointer to entity" if this doens't make sense to you), "" for strings; only function pointers need to initialized), so you can just say say local float total;

Alternative methods usually involve counting entities when they spawn or are created, and then removing them from the total when they are removed. This may involve having to make a wrapper for remove() for certain entities, although you can often use their touch or th_die functions to do this. However, it's useful to know the find() method because it has its uses. Also know that you can only look for strings this way without needing certain engine extensions.

[frag.machine]

As I said, it was very likely to have something wrong or just silly. That's what happens when you have to deal with lots of different programming languages at same time (QuakeC, C, Java, C#, JavaScript, etc): you start mixing things and adopting the same behaviour in all cases - even when is not necessary. But TBH I don't recall having problems with variables being initialized during declaration in QuakeC before.

[Quake123]

How can i use this?

float CountEntities ("player"); ??

[Dr. Shadowborg]

First declare either a regular global float or entity assignable float.

Global float usage:
total_ents = CountEntites("player");

For entity assignable floats: (Example only)
self.total_ents = CountEntities("player");