pico-8 cartridge // http://www.pico-8.com
version 41
__lua__
-- 
function _init()
    --start_scene("title")
    start_scene("level")
end

function _update()
    if _scene and _scene.update then
        _scene.update()
    end
end

function _draw()
    if _scene and _scene.draw then
        _scene.draw()
    end
end

function start_scene(name)
    _scene = _scenes[name]
    _scene_start = time()
    if _scene.start then
        _scene.start()
    end
end

function scene_time()
    return time() - _scene_start
end

_scene = nil
_scenes = {}
_scene_start = 0

function draw_title()
    cls()
    print("title " .. scene_time())
end

function update_title()
    if scene_time() > 2 then
        start_scene("menu")
    end
end

function draw_menu()
    cls()
    print("menu " .. scene_time())
end

function update_menu()
end


function start_level()
    walls = {}
    walls[30]={{0,10}, {25,30}, {38,44}}
    walls[40]={{5,15}, {20,25}, {40,50}}
    walls[50]={{5,10}, {20,30}, {45,55}}
    walls[60]={{5,15}, {20,25}, {40,50}}
    walls[70]={{0,10}, {20,30}, {44,55}}
    walls[80]={{5,15}, {20,25}, {40,50}}
    walls[90]={{0,10}, {25,30}, {38,44}}
    the_line = 64
    spr_frame = 1
    floor = 0
    jump_time = 0
end

function draw_side(right)
    for y, platforms in pairs(walls) do
        for plat in all(platforms) do
            if right then
                line(128-plat[1], y, 128-plat[2], y, DARK)
            else 
                line(plat[1], y, plat[2], y, LIGHT)
            end
        end
    end
end

function draw_level()
    -- left side
    cls(0)
    draw_side(false)
    spr(spr_frame, the_line-8, 120-floor, 1, 1, false)
    rectfill(the_line, 0, 128, 128, LIGHT)
    -- right side
    draw_side(true)
    pal({[LIGHT]=DARK})
    spr(spr_frame, the_line, 120-floor, 1, 1, true)
    pal()
    -- floor
    rectfill(0, 128-floor, the_line, 129-floor, LIGHT)
    rectfill(the_line, 128-floor, 128, 129-floor, DARK)
    fillp(0b1000010000100001)
    rectfill(0, 130-floor, the_line, 128, LIGHT)
    fillp(0b0111101111011110)
    rectfill(the_line, 130-floor, 128, 128, LIGHT)
    fillp()
end

function update_level()
    spr_frame += .1
    if spr_frame >= 4 then
        spr_frame = 1
    end
    floor += 0.2

    -- No button pressed: <
    -- Right button pressed: |
    -- Jump: <<
    -- Jump & Right: >

    local dx = -0.25
    if btnp(4) then
        jump_time = t()
    end
    if btn(1) then
        dx += 0.25
        if t() - jump_time < 1 then
            dx += 0.25
        end
    end
    the_line += dx
end

LIGHT = 6
DARK = 0
_scenes.title = {start=nil, draw=draw_title, update=update_title}
_scenes.menu = {start=nil, draw=draw_menu, update=nil}
_scenes.level = {start=start_level, draw=draw_level, update=update_level}


__gfx__
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