糖画：勺子走到哪糖到哪

fx-sugarart

local SugarArt = {}
local KEY = { FLOW = 0.9 }

local path, drawn = {}, {}

function SA.Draw(dragonPath)
    path = dragonPath
    drawn = { [1] = path[1] }
    SL:PlayActorAct("artisan", "pour")
    local i = 1
    SL:Schedule(function(dt)
        i = i + dt * (SL:GetValue("flowSpeed") or 0.9) * 10
        local idx = math.min(#path, math.floor(i))
        -- 补画走过的所有点
        for k = 1, idx do
            if not drawn[k] then drawn[k] = path[k] end
        end
        SL:SetFxPos("ladle", path[idx].x, path[idx].y - 26)
        -- 随机滴糖
        if math.random() < dt * 16 then
            SL:PlayBurst(path[idx].x, path[idx].y, "sugar_drop", 1)
        end
        if idx >= #path then
            SL:UnSchedule("sugarPour")
            SL:ScheduleOnce(function()
                SA.Lift(path[#path])
            end, 0.8)
        end
    end, 0.016, "sugarPour")
end

function SA.Lift(lastPoint)
    -- 提勺拉丝: 糖丝从画尾向上拉出渐细
    SL:PlayFxAt("sugar_thread", lastPoint.x, lastPoint.y, 0.6)
    SL:PlaySfx("thread")
    SL:ScheduleOnce(function()
        SL:ShowSystemTips("糖画成形 — 提丝收笔")
        SL:PlayFxAt("spark_fade", lastPoint.x + 15, lastPoint.y - 40)
    end, 0.8)
end

return SA