Hi,

I want to calculate the closest entity given in a scan range each time to a target point, please see the image:




1 - Entity 1 has a scan range using SCAN_ENTITY;

2 - Inside that scan range the event_detec its used to enumerate the scanned entities and saved the handle;

Code:

---

if(event_type == event_detect)
{			
   TEMP_SCANNED_ENTITY = you;			
   ds_scan_array_list[ds_scanEntityID] = you;
   ds_scan_array_list[ds_scanEntityID] = handle(TEMP_SCANNED_ENTITY);		
   ds_scanEntityID += 1; 

---

3 - Get the closest detected entity to the target point every time;

Code:

---

function getClosestEntity(&obj) //obj will be target point
{	
   var iDist;
   var i;
   you = 0;
   my = obj;
   while(i < ds_scanEntityID)
   {
      if(ds_scan_array_list[i] == 0)
      {
         i += 1;
         continue;
      }
      ds_TEMP_CLOSEST_ENTITY = ptr_for_handle(ds_scan_array_list[i]);     
      i += 1;
      if(!ds_TEMP_CLOSEST_ENTITY)
      {
      	continue;
      }   	
      if(you == 0 || vec_dist(ds_TEMP_CLOSEST_ENTITY.x,my.x) < iDist)
      {
      you = ds_TEMP_CLOSEST_ENTITY;
      iDist = vec_dist(you.x,my.x);     
      }
   }
      ds_SCANNED_CLOSEST_ENTITY = you;
      return (iDist);
}

---

4 - So, ds_SCANNED_CLOSEST_ENTITY should be always the closest detected entity to the target point, but sometimes it gives strange results. Sometimes it returns the closest entity and sometimes dont work it gives another entity.

What´s the problem in here?

5 - One last question: how can i implement the code in order to enumerate the closest entities to the target point by descendant order?

Thanks in advance.

my = obj; ???

I don't understand this line, why do you fill a pointer with a vector? I'm not really up to date with the latest engine commands but I don't think that that's possible. I would do it by simply using vec_dist (obj,you.x) and not using my at all.

Well, i was trying so hard to reuse all the code that i didnt saw that. This function had been used for entities and pointers and now, with a vector of course it will not work such way.. in c-script.

Now it works like a charm, thank you RedPhoenix for pointing that.

BTW, if you have an idea about the last question just tell me.
Thanks.

I assume obj is an entity, so don't write it as my = obj but obj = my ^^
But for the rest I havn't checked your code to great detail but this was just one strange line I marqued.

Cheers

Frazzle

The following is probably faulty. It uses a plugin and it may not actually emulate the functionality you seek...?
Reference: eLL
Code:

---

entity* ent0;
entity* ent1;
function getClosest(_what, &_centerPoint, _radius, &_point) {
	var dist0; dist0 = 99999;
	var dist1; dist1 = dist0;
	ent0 = NULL;
	eLLNextReset(_what);
	ent0 = eLLNext(_what);
	ent1 = NULL;
	while(ent0 != NULL) {
		if (vec_dist(_centerPoint, ent0.x) <= _radius) {
			dist1 = vec_dist(ent0.x, _point);
			if (dist1 < dist0) {
				dist0 = dist1;
				ent1 = ent0;
			}
		}
		ent0 = eLLNext(_what);
	}
	//ent1 should now be NULL or the closest thing of type _what to _point 
	/// also in sphere centered at _centerpoint with _radius?
}

---

Thanks for the reference testDummy.