ExperimentalGear/scripts/gameplay/chain.lua

local desw = 1080;
local desh = 1920;

local transitionShakeScale = 0;
local transitionShakePosOffset = 0;

function load_number_image(path)
    local images = {}
    for i = 0, 9 do
        images[i + 1] = gfx.CreateSkinImage(string.format("%s/%d.png", path, i), 0)
    end
    return images
end

local chainNumbers = load_number_image('gameplay/chain/reg')

function draw_number(x, y, alpha, num, digits, images, is_dim, scale, kern)
    scale = scale or 1;
	kern = kern or 1;
	local tw, th = gfx.ImageSize(images[1])
	tw = tw * scale;
	th = th * scale;
    x = x + (tw * (digits - 1)) / 2
    y = y - th / 2
    for i = 1, digits do
        local mul = 10 ^ (i - 1)
        local digit = math.floor(num / mul) % 10
        local a = alpha
        if is_dim and num < mul then
            a = 0.4
        end
        gfx.BeginPath()
        gfx.ImageRect(x, y, tw, th, images[digit + 1], a, 0)
        x = x - (tw * kern)
    end
end

local tickTransitions = function (deltaTime)
    
    if transitionShakeScale < 1 then
        transitionShakeScale = transitionShakeScale + deltaTime / 0.075 -- transition should last for that time in seconds
    else
        transitionShakeScale = 0
    end

    if (transitionShakeScale < 0.33) then
        transitionShakePosOffset = 0;
    elseif (transitionShakeScale > 0.66) then
        transitionShakePosOffset = -1;
    else
        transitionShakePosOffset = 1;
    end
end

local render = function (deltaTime, combo, critLineCenterX, critLineCenterY)
    tickTransitions(deltaTime)

    if combo == 0 then return end

    -- comboTimer = comboTimer + deltaTime

    local posx = desw / 2 + transitionShakePosOffset;
    local posy = desh - 650 + transitionShakePosOffset;

    -- if portrait then posy = desh * critLinePos[2] - 150 end

    -- if gameplay.comboState == 2 then
    --     comboCurrent = comboPUC --puc
    -- elseif gameplay.comboState == 1 then
    --     comboCurrent = comboUC --uc
    -- else
    --     comboCurrent = comboREG --regular
    -- end

    -- local alpha = math.floor(comboTimer * 20) % 2
    -- alpha = (alpha * 100 + 155) / 255
    local alpha = 1

    -- \_ chain _/
    local tw, th
    -- tw, th = gfx.ImageSize(comboBottom)
    -- gfx.BeginPath()
    -- gfx.ImageRect(posx - tw / 2 + 10, posy - th / 4 - 210, tw * 0.85, th * 0.85, comboBottom, alpha, 0)

    tw, th = gfx.ImageSize(chainNumbers[1])
    posy = posy - th + 32

    local comboScale = 0.45;
    draw_number(posx - (tw*4*comboScale)/2+(tw*comboScale*1.5)+10, posy - th / 2, 1.0, combo, 4, chainNumbers, true, comboScale, 1.12)
end

return {
    render=render
}