连环闪电：一跳跃三家的雷

fx-chainbolt

local ChainBolt = {}
local KEY = { GAP = 0.22, DECAY = 0.8 }

local function BuildBoltPts(x1, y1, x2, y2)
    local pts = { { x = x1, y = y1 } }
    for i = 1, 8 do
        local t = i / 9
        pts[#pts + 1] = {
            x = x1 + (x2 - x1) * t,
            y = y1 + (y2 - y1) * t + math.random(-7, 7)
        }
    end
    pts[#pts + 1] = { x = x2, y = y2 }
    return pts
end

function ChainBolt.Cast(self_, nodes)
    local dmg = 18
    for i = 1, #nodes - 1 do
        local a, b = nodes[i], nodes[i + 1]
        SL:ScheduleOnce(function()
            SL:DrawLightningPts(BuildBoltPts(a.x, a.y, b.x, b.y),
                                { layer = 2 })
            SL:PlayFxAt("bolt_hit", b.x, b.y)
            SL:ScreenShake(0.14, 3)
            if i == 2 then
                SL:DeductHp(SL:GetValue("curTarget"), dmg)
                SL:ShowHitNum(SL:GetValue("curTarget"), dmg, "bolt")
                SL:PlayActorAct(SL:GetValue("curTarget"), "stuck")
            else
                SL:PlayBurst(b.x, b.y, "violet", 9)
                -- 链尾在引雷桩上爆终雷
                if i == #nodes - 1 then
                    SL:PlayFxAt("final_ring", b.x, b.y)
                end
            end
            dmg = math.floor(dmg * KEY.DECAY)
        end, KEY.GAP * (i - 1))
    end
end

return ChainBolt