当头落雷：从天而降的审判

fx-thunder

function CreateBolt(x0, y0, x1, y1)
    local pts = { { x = x0, y = y0 } }
    local segs = 7
    for i = 1, segs - 1 do
        local p = i / segs
        table.insert(pts, {
            x = x0 + (x1 - x0) * p + (math.random() - 0.5) * 34 * (1 - math.abs(p - 0.5)),
            y = y0 + (y1 - y0) * p + (math.random() - 0.5) * 10
        })
    end
    table.insert(pts, { x = x1, y = y1 })

    local node = CreatePolyLayer()                    -- 三层描边 + 加色混合
    node:DrawPoly(pts, 14, cc.c4f(0.5, 0.3, 1, 0.35)) -- 紫晕
    node:DrawPoly(pts, 6,  cc.c4f(0.7, 0.55, 1, 0.7)) -- 亮紫
    node:DrawPoly(pts, 2.4, cc.c4f(1, 1, 1, 1))       -- 白芯
    FadeOutAndRemove(node, 0.28)
    return node
end

function CastThunder(target)
    local bolt = CreateBolt(target.x + (math.random() - 0.5) * 30, 0,
                            target.x, target.y - 34)
    bolt:ScheduleSecond(0.09, function()              -- 余闪: 半亮度补一刀
        bolt:Replay(0.5)
    end)
    target:OnHit(1)
    SpawnGroundRing(target.x, target.y - 20)          -- 命中扩散环
    ScreenFlash(0.15, 0.3)                            -- 0.15秒 / 三成透明度, 封顶
end