打水漂：漂得越远越是高手

fx-skipstone

local SkipStone = {}
local KEY = { DECAY = 0.55, GOLD = 11 }

function Skip.Throw(angle)
    local quality = math.max(0, 1 - math.abs(angle - KEY.GOLD) / KEY.GOLD)
    -- 角度越接近黄金角, 初始弹跳次数越多
    local skips = 2 + math.floor(quality * 8)
    local sx, sy = 60, SL:GetValue("waterY") - 30 - quality * 24
    SL:PlayFlyFx("stone", sx, sy, nil, nil, 0, nil, nil)
    SL:Schedule(function(dt)
        local s = SL:GetValue("stoneState")
        if not s then SL:UnSchedule("skipRun") return end
        s.vy = s.vy + 260 * dt
        s.x = s.x + s.vx * dt
        s.y = s.y + s.vy * dt
        local waterY = SL:GetValue("waterY")
        if s.y >= waterY and s.vy > 0 then
            if s.left > 0 then
                s.left = s.left - 1
                s.y = waterY
                s.vy = -math.abs(s.vy) * KEY.DECAY
                s.vx = s.vx * 0.96
                SL:PlayFxAt("ripple", s.x, waterY + 3)
                SL:PlayBurst(s.x, waterY + 3, "splash", 6)
                SL:SetValue("skips", SL:GetValue("skips") + 1)
                SL:PlaySfx("skip", math.min(6, SL:GetValue("skips")))
            else
                SL:PlayFxAt("big_splash", s.x, waterY + 3)
                SL:UnSchedule("skipRun")
                SL:SetValue("stoneState", nil)
            end
        end
    end, 0.016, "skipRun")
end

return Skip