Raycasting help

ID:2800809
 
Jun 29 2022, 7:18 pm


Code:
mob/proc/Render(map/map)
    set background      = TRUE
    var fov             = round(FOV / 2)
    var tick            = world.tick_lag * 1.5
    var grid            = map.layout
    var height          = map.height
    var width           = map.width
    var vis             = client.screen[1].vis_contents
    var rx,ry,rxp,ryp,tile,steps,obj/slice/slice,shade,ray_angle,obj/slice/over = new
    var list/tile_density   = list("1","r","e","w","b","z","f","c"), t, v
    var list/slices = GenerateSlices(), tv
    var ts
    over.appearance_flags = RESET_COLOR | RESET_TRANSFORM
    for()
        sleep(tick);. = 0; world.name = "CPU: [round(world.cpu)]% --- ([xpos],[ypos]) , TS: [ts]"; ts = 0
        if(!update){continue}
        update = FALSE
        for(ray_angle = (angle-fov) to (angle+fov) step 0.25)
            .++
            rx = sin(ray_angle) / 16; rxp = xpos
            ry = cos(ray_angle) / 16; ryp = ypos
            //
            steps = 0; slice = vis[.]
            slice.overlays = new
            tv = cos(angle-ray_angle)
            for()
                rxp += rx; ryp += ry; steps ++
                t = height * round(ryp) + rxp - width
                tile = grid[t]
                if(tile in tile_density)
                    shade = 255 - (steps * 0.085) * ICON_SIZE
                    if(42 > shade) shade = 42
                    v = round(((rxp + ryp) * ICON_SIZE) % ICON_SIZE)
                    slice.color = rgb(shade,shade,shade)
                    animate(slice,transform=transform.Scale(1,(512/(steps*tv))),icon=slices[tile][++v])
                    break


Problem description:
So right now all the rays are taking 90,000 steps each time the screen updates and I can't get DDA or whatever it's called to work. I've tried for months and can't comprehend on how to incorporate it so I have come to ask for help.

I understanding finding the size of x and y of the step and compare and step off those values and take the x and y side into consideration, just ZERO clue how to turn that into code that fits with what I have (no clue if that's even possible :D)
Jul 4 2022, 5:12 am
Something something Cunningham's Law
Jul 19 2022, 11:44 am


Would be amazing if someone were to create a raycaster with "stages" to demonstrate how to do such in dm correctly.
Jul 23 2022, 7:18 am
Map System

map
    var width, height, list/layout
    level_001
        width   = 32
        height  = 32
        New()
            var r = "r"
            var e = "e"
            var w = "w"
            var b = "b"
            var z = "z"
            var f = "f"
            var c = "c"
            var s = "s"
            var o = "0"
            var O = "O"
            layout = list(
                z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,z,
                z,o,o,o,o,z,o,o,z,o,o,o,o,o,o,o,o,o,z,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,o,o,o,o,o,o,o,z,o,o,o,o,o,o,o,o,o,z,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,o,o,o,o,z,o,o,o,o,o,o,o,o,o,o,o,o,z,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,o,o,o,o,z,o,o,z,o,o,o,o,o,o,z,z,z,z,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,o,o,o,o,z,o,o,z,o,o,o,o,o,o,z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,o,o,o,o,z,o,o,z,o,o,o,o,o,o,z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,z,o,z,z,z,o,o,z,z,z,o,o,z,z,z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                r,o,o,o,o,o,o,b,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,b,o,o,o,z,
                r,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                r,r,r,r,r,o,o,o,r,r,r,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                r,o,o,o,o,o,o,o,o,o,r,o,o,o,o,o,o,o,o,f,o,o,o,o,o,o,o,o,o,o,o,z,
                r,o,o,o,o,o,o,o,o,o,z,o,o,o,o,o,z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                r,o,o,o,o,o,o,o,o,o,z,o,o,o,o,o,z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                r,o,o,o,o,o,b,o,o,o,z,z,z,z,z,z,z,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                r,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                r,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,b,o,o,o,o,z,
                r,o,o,o,o,o,o,o,o,o,r,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                r,o,o,o,o,o,o,o,o,o,r,o,o,o,o,o,b,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                r,o,o,o,o,o,b,o,o,o,r,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,o,z,
                r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,r,z,
            )


Slice Generation

obj/slice
    icon_state          = "0"
    appearance_flags = KEEP_APART | PIXEL_SCALE
    New(X){pixel_x=X;layer=X}

var icoslice = icon('slice.dmi')
var obj/slicecontainer/slicecontainer = new

obj/slicecontainer
    New(){GenerateSlices()}

proc/GenerateSlices()
    var list/l = new, turf/t
    var list/L = (typesof(/turf)-/turf)
    for(var/path in L){t = new path(locate(1,1,1));l[t.id] = Splice(t.icon,t.icon_state);t.alpha=0}
    return l

proc/Splice(ICON,STATE)
    var icon/i = icon(ICON,STATE), list/l = list(),icon/u, icon/r = icoslice
    var w = i.Width(), x, h = i.Height(), y
    for(x = 1 to w)
        u = icon(r)
        for(y = 1 to h){u.DrawBox(i.GetPixel(x,y),1,y)}
        l += u
    return l

turf/var/tmp/id

turf
    icon        = 'obj8.dmi'
    wall
        id          = "1"
        icon_state  = "wood wall"
    grass
        id          = "0"
        icon_state  = "grass"
    stone_wall
        id          = "r"
        icon_state  = "stone wall"
    eee
        id          = "e"
        icon_state  = "eevee"
    wall2
        id          = "w"
        icon_state  = "wood wall 2"
    bookcase
        id          = "b"
        icon_state  = "bookcase"
    brickwall
        id          = "z"
        icon_state  = "brick wall"
    furnace
        id          = "f"
        icon_state  = "furnace"
    chest
        id          = "c"
        icon_state  = "chest"
    stone_floor
        id          = "s"
        icon_state  = "stone floor"