122 lines
4.1 KiB
Lua
122 lines
4.1 KiB
Lua
-- YataiDON-HSS override of PyTaikoGreen/background/bg_objects/renda.lua: Renda1 origin from x2[1]/y2[1]; frame from frame_count
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-- The three roll effects (birds / shuriken / arrow), replayed as a fixed
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-- round-robin pool of at most POOL_SIZE live pieces.
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local FRAME_MS = 1000.0 / 60.0
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local LIFE = 120
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local SPAWN_X0, SPAWN_X1 = 6, 1100
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local SPAWN_Y0, SPAWN_Y1 = 540, 1020
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local BaseRenda = {}
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BaseRenda.__index = BaseRenda
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function BaseRenda.new(index, vx, vy, spin, path)
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local self = setmetatable({}, BaseRenda)
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self.name = "renda_" .. index
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self.path = path or "background"
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self.vx, self.vy, self.spin = vx, vy, spin or 0
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self.x0 = math.random(SPAWN_X0, SPAWN_X1)
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self.y0 = math.random(SPAWN_Y0, SPAWN_Y1)
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self.frames = 0
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self.last_ms = nil
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local info = tex.get_texture_info("renda", self.name)
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self.frame = math.random(0, ((info and info.frame_count) or 1) - 1)
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self.w = (info and info.x2 and info.x2[1]) or 0
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self.h = (info and info.y2 and info.y2[1]) or 0
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self._id = tex.get_texture(self.path .. "/renda/" .. self.name) -- nil = missing
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return self
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end
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function BaseRenda:update(current_time_ms)
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if self.last_ms then
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local dt = current_time_ms - self.last_ms
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if dt > 0 and dt < 500 then self.frames = self.frames + dt / FRAME_MS end
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end
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self.last_ms = current_time_ms
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end
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function BaseRenda:finished()
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return self.frames >= LIFE
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end
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function BaseRenda:draw(y_offset)
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if not self._id or self:finished() then return end
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local f = self.frames
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local cx = self.x0 + self.vx * f
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local cy = self.y0 + self.vy * f + (y_offset or 0)
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if self.spin ~= 0 then
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tex.draw_texture(self._id, {
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frame = self.frame, x = cx, y = cy,
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origin = { self.w * 0.5, self.h * 0.5 }, rotation = self.spin * f,
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})
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else
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tex.draw_texture(self._id, { frame = self.frame, x = cx - self.w * 0.5, y = cy - self.h * 0.5 })
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end
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end
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local Renda0 = setmetatable({}, {__index = BaseRenda})
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Renda0.__index = Renda0
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function Renda0.new(index, path) return setmetatable(BaseRenda.new(index, 17.3, -10.9, nil, path), Renda0) end
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local Renda1 = setmetatable({}, {__index = BaseRenda})
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Renda1.__index = Renda1
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function Renda1.new(index, path) return setmetatable(BaseRenda.new(index, 17.3, 0, -6, path), Renda1) end
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local Renda2 = setmetatable({}, {__index = BaseRenda})
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Renda2.__index = Renda2
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function Renda2.new(index, path) return setmetatable(BaseRenda.new(index, 13.1, -13.8, nil, path), Renda2) end
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local POOL_SIZE = 10
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local RendaController = {}
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RendaController.__index = RendaController
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-- optional y_offset: the 2P band's second renda instance sits at y = game_2p_offset.y
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function RendaController.new(path, index, y_offset)
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local self = setmetatable({}, RendaController)
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self.rendas = {} -- slot -> live effect (holes allowed)
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self.rr = 0 -- round-robin counter
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self.spawned_this_frame = false
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self.path = path or "background"
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self.index = (index ~= nil) and index or math.random(0, 2)
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self.y_offset = y_offset or 0
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tex.load_folder(self.path, "renda")
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return self
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end
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function RendaController:add_renda()
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-- at most one spawn per frame
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if self.spawned_this_frame then return end
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self.spawned_this_frame = true
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local classes = {Renda0, Renda1, Renda2}
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local cls = classes[self.index + 1]
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local slot = (self.rr % POOL_SIZE) + 1
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self.rr = self.rr + 1
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self.rendas[slot] = cls.new(self.index, self.path) -- replace in slot
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end
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function RendaController:update(current_time_ms)
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self.spawned_this_frame = false
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for slot = 1, POOL_SIZE do
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local r = self.rendas[slot]
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if r then
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r:update(current_time_ms)
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if r:finished() then
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self.rendas[slot] = nil
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end
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end
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end
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end
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function RendaController:draw()
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for slot = 1, POOL_SIZE do
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local r = self.rendas[slot]
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if r then r:draw(self.y_offset) end
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end
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end
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function RendaController:destroy()
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tex.unload_folder(self.path, "renda")
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end
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return RendaController
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