翻花绳：一根绳翻出百样花

fx-catscradle

local CatCradle = {}
local PATTERNS = { "面条", "花手绢", "降落伞", "渔网", "大碗" }

local function PatternNodes(stepIdx)
    local nodes = {}
    for i = 1, 5 do
        local a = -1.5708 + i / 5 * 6.28
        nodes[i] = {
            x = 330 + math.cos(a) * 110,
            y = 160 + math.sin(a) * 80
        }
    end
    -- 花样微调: 每个花样有自己的特征形变
    local mod = stepIdx % 5
    if mod == 1 then nodes[2].y = nodes[2].y + 30 end
    if mod == 2 then nodes[4].y = nodes[4].y - 30 end
    if mod == 3 then nodes[1].x = nodes[1].x - 40 end
    return nodes
end

local step, swapK, swapFrom = 0, nil, nil

function CC.Flip()
    if swapK then return end
    swapFrom = PatternNodes(step)
    step = step + 1
    swapK = 0
    SL:PlaySfx("flip")
    -- 两表插值: 从旧花样流向新花样
    SL:Schedule(function(dt)
        swapK = swapK + dt * 2.4
        local to = PatternNodes(step)
        for i = 1, 5 do
            local t = to[i] or swapFrom[i]
            local f = swapFrom[i]
            local k = math.min(1, swapK)
            SL:SetFxPos("rope" .. i,
                f.x + (t.x - f.x) * k,
                f.y + (t.y - f.y) * k)
        end
        if swapK >= 1 then
            SL:UnSchedule("flipRun")
            swapK = nil
            SL:ShowSystemTips(PATTERNS[step % 5 + 1])
        end
    end, 0.016, "flipRun")
end

-- 错手打结: 绳圈皱成一团的红字提示
function CC.Knot()
    SL:PlayFxAt("rope_knot", 330, 160)
    SL:ShowTipAbove(330, 100, "打结!")
    SL:ScheduleOnce(function()
        step = 0
        SL:SetValue("patternIdx", 0)
    end, 1.2)
end

return CC