84 lines
2.7 KiB
Lua
84 lines
2.7 KiB
Lua
-- Generic 60 fps replay of an exported clip (data.frames / data.shapes tables).
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local ClipPlayer = {}
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ClipPlayer.__index = ClipPlayer
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local FRAME_MS = 1000.0 / 60.0
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-- module: "game/ending_anim/<name>"; path/subset: texture folder (e.g. "game", "<name>_anim")
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function ClipPlayer.new(module, path, subset, x, y)
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local ok, data = pcall(require, module)
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if not ok or type(data) ~= "table" or not data.frames then return nil end
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local self = setmetatable({}, ClipPlayer)
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self.data, self.path, self.subset = data, path, subset
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tex.load_folder(path, subset)
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self.x, self.y = x or 0, y or 0
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self.ids = {}
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self.shape_map = nil
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self.t0 = nil
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self.hold_last = false -- true: stay on the last frame instead of looping
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return self
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end
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function ClipPlayer:id_of(shape)
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local id = self.ids[shape]
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if id == nil then
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id = tex.get_texture(self.path .. "/" .. self.subset .. "/s" .. shape) or false
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self.ids[shape] = id
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end
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return id or nil
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end
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function ClipPlayer:start(now) self.t0 = now end
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function ClipPlayer:started() return self.t0 ~= nil end
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function ClipPlayer:frame(now)
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if not self.t0 then return 0 end
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local f = math.floor((now - self.t0) / FRAME_MS)
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local n, loop_at = self.data.nframes, self.data.loop_at
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if f >= n then
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if self.hold_last then return n - 1 end
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local span = n - loop_at
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f = (span > 0) and (loop_at + (f - loop_at) % span) or (n - 1)
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end
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return f
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end
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-- true once the clip has passed its last frame at least once
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function ClipPlayer:finished(now)
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return self.t0 ~= nil and (now - self.t0) / FRAME_MS >= self.data.nframes
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end
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function ClipPlayer:draw(now, fade)
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if not self.t0 then return end
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fade = fade or 1.0
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local rows = self.data.frames[self:frame(now) + 1]
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if not rows then return end
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local shapes, map = self.data.shapes, self.shape_map
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for i = 1, #rows do
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local r = rows[i]
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local shape = r[1]
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if map and map[shape] then shape = map[shape] end
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local s = shapes[shape]
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local id = s and self:id_of(shape)
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if id then
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local sx, sy = r[4], r[5]
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tex.draw_texture(id, {
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x = self.x + r[2],
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y = self.y + r[3],
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x2 = s[1] * (sx - 1),
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y2 = s[2] * (sy - 1),
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origin = { s[3] * sx, s[4] * sy },
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rotation = r[6],
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fade = r[7] * fade,
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blend = (r[8] == 8) and "additive" or nil, -- add-blended leaf
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})
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end
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end
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end
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function ClipPlayer:destroy()
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tex.unload_folder(self.path, self.subset)
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end
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return ClipPlayer
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