Jagged Movement

ID:1693904
 
Oct 6 2014, 8:10 am
(See the best response by Kaiochao.)
At the moment movement is jagged in my game. I'm not sure if its just me but how do I go about fixing it?

mob
    proc
        MoveSpeed()
            src.speed = (0.008 * src.udex) + 4 + cmsboost 
            
        Get_Speed()
            src.speed = (0.008 * src.udex) + 4 + cmsboost
            return src.speed
            

    

world
    icon_size = 32
    fps = 25
#define TILE_WIDTH  32
#define TILE_HEIGHT 32
#define TICK_LAG    0.4 //set to (10 / world.fps) a define is faster, though

atom/movable
    var
        speed = 4
        move_delay = 4 * TICK_LAG
        tmp
            last_move = -1000
    Move(atom/NewLoc,Dir=0,step_x=0,step_y=0)
        move_delay = speed * TICK_LAG
        //set up glide sizes before the move
        //ensure this is a step, not a jump
        if(src.loc && get_dist(src,NewLoc)==1)
            if(last_move + move_delay > world.time)
                return 0
            . = get_dir(src,NewLoc)
            if(. & . - 1) //if a diagonal move
                src.glide_size = sqrt(TILE_WIDTH**2 + TILE_HEIGHT**2) / move_delay * TICK_LAG
                //glide value must be based on the hypotenuse
            else if(. < 4) //north or south case
                src.glide_size = TILE_HEIGHT / move_delay * TICK_LAG
                //glide value must be based on the adjacent
            else //east or west case
                src.glide_size = TILE_WIDTH / move_delay * TICK_LAG
                //glide value must be based on the opposite
            . = ..(NewLoc,Dir,step_x,step_y)
            if(.)
                last_move = world.time
            return .
        . = ..(NewLoc,Dir,step_x,step_y)


byond://99.244.157.106:800
Oct 6 2014, 2:04 pm
Well one thing to mention here, why are you doing this yourself? There's demos that show how to do this already.

http://www.byond.com/developer/FIREking/SmoothTileMovement

Also, are you getting this only when you host the game? (I get this no matter what when I host a game)
Oct 6 2014, 2:22 pm
This is actually Ter's code.

You should make sure that either one of your MoveSpeed() or Get_Speed() procs is being called and returns what you expect. At this point, I can't say what values for src.speed work well, especially not knowing your desired result.
Oct 6 2014, 2:30 pm (Edited on Oct 6 2014, 2:44 pm)
I originally was using FIREking's smooth tile movement, and it was smooth as fuck I was so happy but as soon as I started hosting the game it was laggy. So I switch to Ter's version, but the same thing happened(but a lot less and consistent with hosting/not hosting). Its why I have both Movespeed() and Get_Speed(), Movespeed() proc was for FIREking's and Get_Speed() was for Ter's.

/*world
    fps = 40

mob
    var/w,a,s,d = 0

    Login()
        ..()
        winset(client, "w", "parent=macro;name=w;command=keydown+w")
        winset(client, "w+up", "parent=macro;name=w+up;command=keyup+w")

        winset(client, "a", "parent=macro;name=a;command=keydown+a")
        winset(client, "a+up", "parent=macro;name=a+up;command=keyup+a")

        winset(client, "s", "parent=macro;name=s;command=keydown+s")
        winset(client, "s+up", "parent=macro;name=s+up;command=keyup+s")

        winset(client, "d", "parent=macro;name=d;command=keydown+d")
        winset(client, "d+up", "parent=macro;name=d+up;command=keyup+d")

        spawn move_loop()

    proc/move_loop()
        if(world.time >= move_time) //should we do anything?
            if(!step(src, (s && (SOUTH || s)) | (w && (NORTH || w)) | (a && (WEST || a)) | (d && (EAST || d)))) //try desired direction
                if(!step(src, (s && (SOUTH || s)) | (w && (NORTH || w)))) //that failed, try north or south
                    step(src, (a && (WEST || a)) | (d && (EAST || d))) //that failed, try east or west
        spawn(world.tick_lag) move_loop() //return, and do it again

    verb/keydown(k as text)
        set hidden = 1
        set instant = 1
        if(k == "w") w = 1
        if(k == "a") a = 1
        if(k == "s") s = 1
        if(k == "d") d = 1

    verb/keyup(k as text)
        set hidden = 1
        set instant = 1
        if(k == "w") w = 0
        if(k == "a") a = 0
        if(k == "s") s = 0
        if(k == "d") d = 0



//get_speed_delay(n) takes an argument speed "n" and returns how long it would take to travel 1 tile at this speed in 10ths of a second
proc/get_speed_delay(n)
    return (world.icon_size * world.tick_lag) / (!n ? 1 : n)

//get_glide_size(n, dir) takes an argument speed "n", and direction "dir", and returns the smoothest possible glide_size setting
proc/get_glide_size(n, dir)
    return (dir & (dir - 1)) ? n + (n >> 1) : n

atom/movable
    var/speed = 4
    var/tmp/move_time = 0
    var/tmp/transferring = 0

    Move()
        if(!src.loc) return ..()

        if(world.time < src.move_time) return 0

        if(transferring) return 0

        . = ..()

        if(.)
            src.move_time = world.time + get_speed_delay(src.speed)
            src.glide_size = get_glide_size(src.speed, src.dir)

        return .

    proc/Transfer(atom/location)
        if(!location) return

        src.transferring = 1

        spawn(get_speed_delay(src.speed) - world.tick_lag)
            src.x = location.x
            src.y = location.y
            src.z = location.z

            spawn(world.tick_lag)
                src.transferring = 0

*/

mob
    proc
        MoveSpeed()
            src.speed = (0.008 * src.udex) + 4 + cmsboost

        Get_Speed()
            src.speed = (0.008 * src.udex) + 4 + cmsboost
            return src.speed




world
    icon_size = 32
    fps = 25
#define TILE_WIDTH  32
#define TILE_HEIGHT 32
#define TICK_LAG    0.4 //set to (10 / world.fps) a define is faster, though

atom/movable
    var
        speed = 4
        move_delay = 4 * TICK_LAG
        tmp
            last_move = -1000
    Move(atom/NewLoc,Dir=0,step_x=0,step_y=0)
        move_delay = speed * TICK_LAG
        //set up glide sizes before the move
        //ensure this is a step, not a jump
        if(src.loc && get_dist(src,NewLoc)==1)
            if(last_move + move_delay > world.time)
                return 0
            . = get_dir(src,NewLoc)
            if(. & . - 1) //if a diagonal move
                src.glide_size = sqrt(TILE_WIDTH**2 + TILE_HEIGHT**2) / move_delay * TICK_LAG
                //glide value must be based on the hypotenuse
            else if(. < 4) //north or south case
                src.glide_size = TILE_HEIGHT / move_delay * TICK_LAG
                //glide value must be based on the adjacent
            else //east or west case
                src.glide_size = TILE_WIDTH / move_delay * TICK_LAG
                //glide value must be based on the opposite
            . = ..(NewLoc,Dir,step_x,step_y)
            if(.)
                last_move = world.time
            return .
        . = ..(NewLoc,Dir,step_x,step_y)


Is it that only the host suffers from this problem or is it just the best that it'll ever be?
Oct 6 2014, 2:39 pm
I need to reference lummox to this. I'm having the same issues and I've got a topic for it:

http://www.byond.com/forum/?post=1675744

Finally I know I'm not the only one experiencing this.
Oct 6 2014, 3:09 pm
step_x and step_y are terrible in ss13 and cause jagged movement, we have to use pixel_x and pixel_y not sure if that applys here though.
Oct 6 2014, 3:14 pm
Best response
If you're actually using pixel movement (step_x, step_y), you really shouldn't have any delays in between steps.
Oct 6 2014, 6:18 pm
In response to Sgt.Marine
I noticed that I couldn't really see much if any jagged movement when using Forum Account's side scroller library. After some investigation I saw he was using pixel_x and y instead of the built in pixel movement.

I think there's problems with it.