91 lines
3.1 KiB
Lua
91 lines
3.1 KiB
Lua
-- YataiDON-HSS override of PyTaikoGreen/background/bg_objects/donbg/6.lua:
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-- adds the cabinet's three sakura-petal drifters (between the two scrolling layers).
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local DonBGBase = require("background/bg_objects/donbg/base")
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DonBG6 = setmetatable({}, { __index = DonBGBase })
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DonBG6.__index = DonBG6
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local PETAL_W, PETAL_H = 391, 208
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local PETAL_REG_X = -195
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local PETAL_REG_Y = -104
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local PETAL_LOOP_FRAMES = 160
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local PETAL_X0, PETAL_Y0 = 2308.0, -106.0
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local PETAL_DX = -4.830189
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local PETAL_DY = 3.069182
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local PETAL_GAP = 980.0
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local PETAL_COPIES = 3
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local BAND_H = 276
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function DonBG6.new(index, player_num, path)
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local self = setmetatable({}, DonBG6)
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local base = DonBGBase.new(index, player_num, path)
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for k, v in pairs(base) do self[k] = v end
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self._id_petal = tex.get_texture(self.path .. "/" .. self.name .. "/overlay_2")
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-- fail soft: only the DEFAULT pack ("5_x", path "background") owns this rig
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self._petals_on = self.use_layers and (self._id_petal ~= nil)
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return self
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end
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-- One petal cluster, cropped to the band [y, y + 276).
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function DonBG6:_draw_petal(frame, fade, y, cx, top)
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local band_top, band_bottom = y, y + BAND_H
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if top >= band_bottom or top + PETAL_H <= band_top then return end
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local sy = 0
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if top < band_top then sy = band_top - top end
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local h = PETAL_H - sy
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if top + sy + h > band_bottom then h = band_bottom - (top + sy) end
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if h <= 0 then return end
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tex.draw_texture(self._id_petal, {
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frame = frame, fade = fade,
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x = cx + PETAL_REG_X,
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y = top + sy,
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src = { x = 0, y = sy, width = PETAL_W, height = h },
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y2 = h - PETAL_H,
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})
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end
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function DonBG6:_draw_petals(frame, fade, y)
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if not self._petals_on then return end
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local f = (self.elapsed / (1000.0 / 60.0)) % PETAL_LOOP_FRAMES
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local cx = PETAL_X0 + PETAL_DX * f
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local top = (PETAL_Y0 + PETAL_DY * f) + PETAL_REG_Y + y
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for i = 0, PETAL_COPIES - 1 do
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self:_draw_petal(frame, fade, y, cx - i * PETAL_GAP, top)
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end
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end
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-- Same shape as DonBGBase:draw(), with the drifters slotted in at their real
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-- display-list depth: after the depth-0 backdrop, before the depth-4 motif row.
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function DonBG6:draw(y)
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y = y or 0
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if not self.use_layers then return DonBGBase.draw(self, y) end
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local normal = self.states.normal or {}
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local fever = self.states.fever
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local back, front = {}, {}
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for i, l in ipairs(normal) do
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table.insert(i == 1 and back or front, l)
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end
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self:draw_layers(back, 1.0, y)
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self:_draw_petals(0, 1.0, y)
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self:draw_layers(front, 1.0, y)
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local fade = nil
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if self.is_clear then
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fade = self.clear_fade.attribute
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elseif self.exit_fade then
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fade = self.exit_fade.attribute
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end
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if fade and fever then
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local fback, ffront = {}, {}
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for i, l in ipairs(fever) do
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table.insert(i == 1 and fback or ffront, l)
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end
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self:draw_layers(fback, fade, y)
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self:_draw_petals(1, fade, y)
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self:draw_layers(ffront, fade, y)
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end
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end
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return DonBG6
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