抗拒火环：敢近身就给你弹开

fx-repel

local Repel = {}
local KEY = { RADIUS = 96, FRICTION = 3.2 }

function Repel.OnMove(target)
    if not Repel.armed then return end
    local self_ = SL:GetValue("selfActor")
    local sx, sy = SL:GetValue("actorX", self_), SL:GetValue("actorY", self_)
    local tx, ty = SL:GetValue("actorX", target), SL:GetValue("actorY", target)
    local dx, dy = tx - sx, ty - sy
    local dist = math.sqrt(dx * dx + dy * dy)
    if dist > KEY.RADIUS or dist < 1 then return end
    -- 命中近身圈: 径向单位向量
    local nx, ny = dx / dist, dy / dist
    SL:PlayActorAct(self_, "cast")
    SL:PlayFxAt("fire_ring", sx, sy)
    SL:ScreenShake(0.26, 4)
    -- 核心一步：沿径向给速度，力度可配
    local power = 300
    SL:SetActorVelocity(target, nx * power, ny * power)
    SL:ShowTipAbove(target, "弹开!")
    SL:PlayActorAct(target, "stuck")
    -- 速度衰减与落地硬直交给 WatchFly
    Repel.WatchFly(target)
end

function Repel.WatchFly(target)
    SL:Schedule(function(dt)
        local vx, vy = SL:GetValue("actorVX", target), SL:GetValue("actorVY", target)
        local sp = math.sqrt(vx * vx + vy * vy)
        if sp < 18 then
            SL:SetActorVelocity(target, 0, 0)
            SL:UnSchedule("repelFly")
            SL:PlayActorAct(target, "stuck")
        else
            SL:SetActorVelocity(target, vx * (1 - dt * KEY.FRICTION),
                                       vy * (1 - dt * KEY.FRICTION))
            -- 拖尾尘土
            if math.random() < 0.3 then
                SL:PlayFxAt("dust", SL:GetValue("actorX", target),
                                       SL:GetValue("actorY", target))
            end
        end
    end, 0.016, "repelFly")
end

return Repel