PyTaikoGreen/Scripts/bg_collabs/oshiri.lua

local DonBGBase = require("Skins/PyTaikoGreen/Scripts/bg_objects/donbg/base")
local BGNormal  = require("Skins/PyTaikoGreen/Scripts/bg_objects/bg_normal")
local Fever     = require("Skins/PyTaikoGreen/Scripts/bg_objects/fever")
local Footer    = require("Skins/PyTaikoGreen/Scripts/bg_objects/footer")
local Dancer    = require("Skins/PyTaikoGreen/Scripts/bg_objects/dancer")
local RendaController = require("Skins/PyTaikoGreen/Scripts/bg_objects/renda")
local ChibiController = require("Skins/PyTaikoGreen/Scripts/bg_objects/chibi")

local COLLAB_PATH = "background/collab/oshiri"
local MAX_DANCERS = 5

-- Custom DonBG: 16*scale wide tiled background + 3 overlay rows per tile
local OshiriDonBG = setmetatable({}, {__index = DonBGBase})
OshiriDonBG.__index = OshiriDonBG

function OshiriDonBG.new(player_num)
    local self = setmetatable({}, OshiriDonBG)
    local base = DonBGBase.new(1, player_num, COLLAB_PATH)
    for k, v in pairs(base) do self[k] = v end
    local bg_width = self.bg_texture and self.bg_texture.width or 0
    local sc = tex.get_screen_scale()
    self.move = anim.move(20000, {total_distance = -bg_width * sc * 8, loop = true})
    return self
end

function OshiriDonBG:draw_textures(fade, y, frame)
    local sc = tex.get_screen_scale()
    local bg_width = self.bg_texture and self.bg_texture.width or 0
    for i = 0, math.floor(16 * sc) - 1 do
        tex.draw_texture(self.name, "background", {
            frame = frame, fade = fade,
            x = (i * bg_width) + self.move.attribute, y = y
        })
        for j = 0, 2 do
            tex.draw_texture(self.name, "overlay", {
                frame = frame, fade = fade,
                x = (i * bg_width) + self.move.attribute,
                y = y + (j * 70 * sc)
            })
        end
    end
end

-- BGFever: looping 3-frame overlay; immediately transitioned on start
local OshiriBGFever = {}
OshiriBGFever.__index = OshiriBGFever

function OshiriBGFever.new()
    local self = setmetatable({}, OshiriBGFever)
    self.name = "bg_fever_0"
    tex.load_folder(COLLAB_PATH, "bg_fever/" .. self.name)
    self.transitioned = false
    self.overlay_texture_change = anim.texture_change(2049, {
        {0, 683, 0}, {683, 1366, 1}, {1366, 2049, 2}
    }, {loop = true})
    return self
end

function OshiriBGFever:start()
    self.transitioned = true
end

function OshiriBGFever:update(current_time_ms)
    self.overlay_texture_change:update(current_time_ms)
end

function OshiriBGFever:draw()
    tex.draw_texture(self.name, "background")
    tex.draw_texture(self.name, "overlay", {frame = self.overlay_texture_change.attribute})
end

function OshiriBGFever:destroy()
    tex.unload_folder(COLLAB_PATH, "bg_fever/" .. self.name)
end

-- Custom DancerGroup: fixed variant assignment (0, 1, 1, 1, 1), no shuffle
local OshiriDancerGroup = setmetatable({}, {__index = Dancer.BaseDancerGroup})
OshiriDancerGroup.__index = OshiriDancerGroup

function OshiriDancerGroup.new(bpm)
    local self = setmetatable({}, OshiriDancerGroup)
    self.name = "dancer_0"
    self.active_count = 0
    self.path = COLLAB_PATH
    tex.load_folder(COLLAB_PATH, "dancer/" .. self.name)
    self.spawn_positions = {2, 1, 3, 0, 4}
    self.active_dancers = {}
    self.max_dancers = MAX_DANCERS
    local BaseDancer = Dancer.Base
    self.dancers = {
        BaseDancer.new(self.name, 0, bpm),
        BaseDancer.new(self.name, 1, bpm),
        BaseDancer.new(self.name, 1, bpm),
        BaseDancer.new(self.name, 1, bpm),
        BaseDancer.new(self.name, 1, bpm),
    }
    self.needs_initial_dancer = true
    return self
end

function OshiriDancerGroup:update(current_time_ms, bpm)
    if self.needs_initial_dancer then
        self.needs_initial_dancer = false
        self:add_dancer()
    end
    Dancer.BaseDancerGroup.update(self, current_time_ms, bpm)
end

-- Background

local OshiriBackground = {}
OshiriBackground.__index = OshiriBackground

function OshiriBackground.new(player_num, bpm)
    local self = setmetatable({}, OshiriBackground)
    self.donbg     = OshiriDonBG.new(player_num)
    self.bg_normal = BGNormal.Base.new(0, COLLAB_PATH)
    self.bg_fever  = OshiriBGFever.new()
    self.footer    = Footer.new(COLLAB_PATH, 0)
    self.fever     = Fever.create(3, bpm, COLLAB_PATH)
    self.dancer    = OshiriDancerGroup.new(bpm)
    self.renda     = RendaController.new(COLLAB_PATH, 0)
    self.chibi     = ChibiController.new(bpm, COLLAB_PATH, 0)
    self.is_clear   = false
    self.is_rainbow = false
    self.last_milestone = 1
    return self
end

function OshiriBackground:update(current_ms, bpm)
    self.donbg:update(current_ms)
    self.bg_fever:update(current_ms)
    self.fever:update(current_ms, bpm)
    self.dancer:update(current_ms, bpm)
    self.renda:update(current_ms)
    self.chibi:update(current_ms, bpm)
end

function OshiriBackground:handle_good(player_num)  self.chibi:add_chibi(player_num, false) end
function OshiriBackground:handle_ok(player_num)    self.chibi:add_chibi(player_num, false) end
function OshiriBackground:handle_bad(player_num)   self.chibi:add_chibi(player_num, true) end
function OshiriBackground:handle_drumroll(player_num) self.renda:add_renda() end
function OshiriBackground:handle_balloon(player_num)  self.renda:add_renda() end

function OshiriBackground:handle_gauge(player_num, progress, is_clear, is_rainbow)
    self.donbg:set_clear(is_clear)
    if is_clear and not self.is_clear then self.bg_fever:start() end
    if is_rainbow and not self.is_rainbow then self.fever:start() end
    self.is_clear   = is_clear
    self.is_rainbow = is_rainbow

    local current_milestone
    if is_clear then
        current_milestone = MAX_DANCERS
    else
        current_milestone = math.min(MAX_DANCERS - 1, math.floor(progress * MAX_DANCERS))
    end
    if current_milestone > self.last_milestone then
        for _ = 1, current_milestone - self.last_milestone do self.dancer:add_dancer() end
        self.last_milestone = current_milestone
    elseif current_milestone < self.last_milestone then
        for _ = 1, self.last_milestone - current_milestone do self.dancer:remove_dancer() end
        self.last_milestone = current_milestone
    end
end

function OshiriBackground:draw_back()
    if self.is_clear then
        if not self.bg_fever.transitioned then
            self.bg_normal:draw()
            self.bg_fever:draw()
        else
            self.bg_fever:draw()
        end
    else
        self.bg_normal:draw()
    end
    self.donbg:draw()
    self.renda:draw()
    self.dancer:draw()
    self.footer:draw()
    if self.is_rainbow then self.fever:draw() end
    self.chibi:draw()
end

function OshiriBackground:draw_fore() end

function OshiriBackground:destroy()
    self.donbg:destroy()
    self.bg_normal:destroy()
    self.bg_fever:destroy()
    self.fever:destroy()
    self.dancer:destroy()
    self.footer:destroy()
    self.renda:destroy()
    self.chibi:destroy()
end

return OshiriBackground