Obj movement

ID:145412
 
Mar 24 2006, 10:44 am
Code:
obj
    Move()
        if(src.walkingback) {..();return 0}
        if(istype(src,/obj/shadow))
            var/prevloc=src.loc
            ..()
            var/prevdir=src.dir
            src.loc=prevloc
            src.dir=prevdir
            if(src.dir==NORTHEAST) {src.walkingback=1;step(src,rand(NORTH,EAST));src.walkingback=0}
            if(src.dir==NORTHWEST) {src.walkingback=1;step(src,rand(NORTH,WEST));src.walkingback=0}
            if(src.dir==SOUTHEAST) {src.walkingback=1;step(src,rand(SOUTH,EAST));src.walkingback=0}
            if(src.dir==SOUTHWEST) {src.walkingback=1;step(src,rand(SOUTH,WEST));src.walkingback=0}
            else {src.walkingback=1;step(src,src.dir);src.walkingback=0}
            var/obj/a=new/obj/trail(prevloc)
            a.dir=turn(src.dir,180)
            a.following=src
            a.owner=src.shadow
        else ..()


Problem description:
Besides this being messy code (Euh, someone explain me how to make it non-messy? o.o;...), what causes the object (/obj/shadow) to hop around in no logical direction at all, untill it comes on a location where it can walk straight to the mob?

Mar 24 2006, 10:48 am
I don't understand what your trying to do. Could you maybe explain is better?
Mar 24 2006, 10:49 am
In response to Mega fart cannon
Ah, right. I'm trying to disable diagonal movement of /obj/shadow... When their direction is, for example, NORTHEAST, it'll randomly walk NORTH or EAST.
Mar 24 2006, 10:55 am
In response to Mysame
Do you mean something like this:

step(src,rand(NORTH,SOUTH,EAST,WEST))


?
Mar 24 2006, 10:56 am
In response to Mega fart cannon
Euh, that's what I do, but according to the movement they're going to take (diagonally)..
Mar 24 2006, 5:36 pm
In response to Mysame
Mysame wrote:
Ah, right. I'm trying to disable diagonal movement of /obj/shadow... When their direction is, for example, NORTHEAST, it'll randomly walk NORTH or EAST.

You can always do this to keep a direction cardinal.

dir &= pick(3, 12)


The resulting direction will always be cardinal.

~~> Unknown Person
Mar 25 2006, 12:32 am
In response to Unknown Person
Though, that works, the 'shadow' can be easily fooled if the target runs up/down or left/right a number of times. Is there any way to make it walk the shortest possible path?

Right now it goes like; (U = users, M = target, -|=shadow)
U-------|
|
|
M
, anyway it could go
U-
|-
|-
|---M


I've tryed playing around with the bits a bit, but it just resulted in the shadow walking in non-logical directions, as before...
Mar 25 2006, 12:41 am
In response to Mysame
Pathfinding. I suggest you look up information on A*. I think Deadron wrote a library that does it, too.

There would almost certainly be an option to disable diagonal movement for the pathfinding.
Mar 25 2006, 12:56 am
In response to Jp
Why does everybody I ask how to do it say A*pathfinding? I don't understand hell of it, I doubt if I ever will. That's why I'm trying to find a less complicated way! :|