Turf Contents Check (Fixed)

ID:155499
 
Jun 19 2011, 1:37 pm (Edited on Jun 19 2011, 10:31 pm)
I'm working on the AI for zombies in a zombie survival RTS game right now. In these early stages, the AI is set to walk continuously towards a destination until the reach it. When they hit a wall (the walls are obj type), they automatically start doing damage to it until it's destroyed and they can go through. Before they start destroying the wall, I want them to check the surrounding turfs to see if there's an easier way to go.

Is there a proc that checks the contents of a turf to see if it's occupied by a dense object? Thanks!
Jun 19 2011, 7:44 pm
You'll need pathfinding for this, which is not necessarily a one line set of code...
Jun 19 2011, 8:59 pm
In response to Ill Im
Yes I know, I'm just not sure about turf contents. Like say I check the turf directly to the left of the NPC, what would I do to see whether or not it's occupied? Would I need to populate an array of turf.contents, and then check the items in the array to see if they're dense?
Jun 19 2011, 9:04 pm
In response to Calthion
If your just checking for dense objects, Enter() would probably work for you. It will return 1 if there are no other dense already present.
Jun 19 2011, 9:12 pm
In response to Jotdaniel
Alright, and I can call Enter() without needing to be trying to step there? (For example Calling Enter() on location(src.x+2, src.y+1, src.z) I'll try it out! Thanks!
Jun 19 2011, 9:14 pm
In response to Calthion
Right, you just need to tag the turf your trying to get to, then call Enter() on it: if(T.Enter()) something like that.
Jun 19 2011, 9:15 pm
In response to Jotdaniel
All right thank you for your help!
Jun 19 2011, 9:17 pm
In response to Calthion
Sorry, you can use get_step() to grab the turf at the new location. I've done this before to do a basic 3d display(room by room movement type of thing).
Jun 19 2011, 10:30 pm
In response to Jotdaniel
This is what I came up with and it works quite well for the current purpose. Thank you for your help.

    Bump(var/obj/O)
        ..()
        var/free = 0
        var/turf/T
        switch(src.dir)
            if(NORTH)
                T = get_step(src, NORTHEAST)
                free = T.Enter(src)
                if(free)
                    walk_to(src, T)
                    sleep(10)
                    walk_towards(src, locate(250, 250, 1), 10)
                else
                    T = get_step(src, NORTHWEST)
                    free = T.Enter(src)
                    if(free)
                        walk_to(src, T)
                        sleep(10)
                        walk_towards(src, locate(250, 250, 1), 10)
            if(EAST)
                T = get_step(src, NORTHEAST)
                free = T.Enter(src)
                if(free)
                    walk_to(src, T)
                    sleep(10)
                    walk_towards(src, locate(250, 250, 1), 10)
                else
                    T = get_step(src, SOUTHEAST)
                    free = T.Enter(src)
                    if(free)
                        walk_to(src, T)
                        sleep(10)
                        walk_towards(src, locate(250, 250, 1), 10)
            if(SOUTH)
                T = get_step(src, SOUTHEAST)
                free = T.Enter(src)
                if(free)
                    walk_to(src, T)
                    sleep(10)
                    walk_towards(src, locate(250, 250, 1), 10)
                else
                    T = get_step(src, SOUTHWEST)
                    free = T.Enter(src)
                    if(free)
                        walk_to(src, T)
                        sleep(10)
                        walk_towards(src, locate(250, 250, 1), 10)
            if(WEST)
                T = get_step(src, NORTHWEST)
                free = T.Enter(src)
                if(free)
                    walk_to(src, T)
                    sleep(10)
                    walk_towards(src, locate(250, 250, 1), 10)
                else
                    T = get_step(src, SOUTHWEST)
                    free = T.Enter(src)
                    if(free)
                        walk_to(src, T)
                        sleep(10)
                        walk_towards(src, locate(250, 250, 1), 10)

        O.health -= 50
        O.destroy()
Jun 19 2011, 11:00 pm
In response to Calthion
Looks pretty good. I'm glad I could help.
Jun 20 2011, 12:30 am
In response to Calthion
You can use turn() to cut down on a lot of that code.
Jun 20 2011, 12:49 am
In response to DarkProtest
DarkProtest wrote:
You can use turn() to cut down on a lot of that code.


I didn't even think about that, funny though because the example I made that I was pulling from used turn() extensively. Here's what this could look like:

mob/proc/MoveCheck()
     T = get_step(src,turn(src.dir,-45))
     free = T.Enter(src)
     if(free)
          walk_to(src, T)
          sleep(10)
          walk_towards(src, locate(250, 250, 1), 10)
     else
          T = get_step(src,turn(src.dir,45))
          free = T.Enter(src)
          if(free)
               walk_to(src, T)
               sleep(10)
               walk_towards(src, locate(250, 250, 1), 10)


//Your bump for whatever it is.


    Bump(var/obj/O)
        ..()
        var/free = 0
        var/turf/T
        src.MoveCheck()
        O.health -= 50
        O.destroy()



I didn't test this, but it should work the same as the original the OP made, a bit more efficient, and a lot less cluttered.