Moveto closest actor

[Troodon]

Hi,
How can I make my actor to move to the closest "tree" actor?

[makslane]

You can use the getAllActorsInCollision to get the actors that you want to test, and use the distance function the get the smaller distance to your player.


Look more here:http://game-editor.com/docs/script_reference.htm#distance
http://game-editor.com/docs/script_refe ... ncollision
http://game-editor.com/examples/collisiongroups.zip

[Troodon]

I'll try if I can get it work with those link. Thanks

[Troodon]

I couldn't get it work.
Could someone make a example of the moveto closest actor?

EDIT: Happy new year!

[Troodon]

Can someone help?
I still can't get it work...

I have an actor called monster and I would like it to move towards nearest actor called sini.
I readed all that the documentation is saying about distance and trying to understand the logic of the getAllactorsinCollision but I can't still figure how should I make it.

[makslane]

Can you post the code?

[Troodon]

I haven't got any code of moveto closest actor because I can't understand the way it works. (I just tried different things but it said that there were errors in code) If there could be some kind of tutorial/demonstration or something...

[makslane]

Use a sensor actor (Filled Region) to act like a sensor.
Get all actors that collides with the sensor and calculate the distance.

Here is the code:

Code: Select all

int n;
double mindist = 10000; //Initialize min distance with some high value
Actor *actors, *closest = NULL;

//Get all actors that collides with the sensor actor
actors = getAllActorsInCollision("Event Actor", &n);


if(actors)
{
  int i;
  for(i = 0; i < n; i++)
  {
    if(strcmp(actors[i].name, "player") != 0) //Ignore the player actor
    {
       double d = distance(player.x, player.y, actors[i].x, actors[i].y);
       if(d < mindist)
       {
           //Hold the closest actor
           closest = (actors + i);
           mindist = d;
       }
    }
  }
}

//Move the closest actor, if any
if(closest)
{
    MoveTo(closest->clonename, 0, 0, 5, "player", "");
}

[Troodon]

I couldn't open the example ged but I'll try that code. I haven't yet never used so complicated looking code in GE!
I write that in the filled region's draw actor?

[makslane]

In this sample I put in the 'Mouse Button Down' event of the sensor actor

[Troodon]

Ok, and because my monster checks always which is the closest of my actors; I put it in the draw actor of the filled.

[Troodon]

Sorry to distract, but how do I edit this line:

Code: Select all

MoveTo(closest->clonename, 0, 0, 5, "player", "");

[makslane]

What you need?

[Troodon]

Well, I don't completely understand the code but I want to make the "player" to move towards the closest "tree" actor.

[makslane]

Change the line:

Code: Select all

if(strcmp(actors[i].name, "player") != 0) //Ignore the player actor

To:

Code: Select all

if(strcmp(actors[i].name, "tree") == 0) //On tree actors