pico-8 cartridge // http://www.pico-8.com
version 4
__lua__
--flier: test of tranus
--      chris scott, 2015


--btn(0) = left
--btn(1) = right
--btn(2) = up
--btn(3) = down
--btn(4) = z
--btn(5) = x

function makewall(s, h)
                                            -- size, height, id
    wall = {}
    wall.s = s
    wall.h = h
    wall.x = 127 -- screen pos
    add(w, wall)
end

function _init()
    debug = true -- set to false later
    size = 3
    height = 0
    pause = 200
    nextwall = 20 -- next wall time
    t = 0 -- time
    w = {} -- walls
    p1 = {} -- init player 1
    p1.x = 0 -- x pos
    p1.y = 0 -- y pos
    p1.f = 0 -- frame
    p1.fs = 0 -- first frame
    p1.fe = 5 -- last frame
    p1.roll = false -- are we rollin'?
    wsindex = {16,32,48} -- top, mid, bottom
    wid = 0 -- initial wall id

end

function _update()
    t += 1 -- increase time

    -- roll animation
    if p1.roll then
        if (p1.f < p1.fe) then
            p1.f += 1 -- animate the player
        else
            p1.f = p1.fs -- reset the sprite
            p1.roll = false --stop rollin'
        end
    end

    -- input
    if (btn(0)) then p1.x -= 1 end
    if (btn(1)) then p1.x += 1 end
    if (btn(2)) then p1.y -= 1 end
    if (btn(3)) then p1.y += 1 end
    if (btn(4)) then p1.roll = true end

    -- wall making
    if (t == nextwall)  then
        wid += 1
        height += flr(rnd(20))-10
        makewall(size, height)
        nextwall += pause
    end

    -- wall moving
    if w then
        for i in all(w) do

        end
    end
end

function _draw()
    -- gotta clear the screen
    cls()
    -- draw player
    spr(p1.f, p1.x, p1.y)

    -- draw walls
    for i in all(w) do
        -- draw top edge
        spr(wsindex[3], w[i]["x"], w[i]["h"]-8)
        -- draw bottom edge
        spr(wsindex[1], w[i].x, w[i].h+w[i].s*8)
    end
    if debug then
        --wallx = w.wid.x
        print("tick "..t)
        print("wallid "..wid)
        print("walls")
        for i in all(w) do
            print(w[1].x)
        end
 end

end