local FuncNode_DistanceBuffSource = class("FuncNode_DistanceBuffSource")

--[[
	初始化
--]]
function FuncNode_DistanceBuffSource:initialize(entity)
    self.LimitChildCount = 0
    self.Type = LuaConst.ConditionFuncType.DistanceBuffSource
end

--[[
	执行
--]]
function FuncNode_DistanceBuffSource:Run(conditionDataNode, entity, missile, buffObject)
    local lastUpdateData = buffObject:GetLastUpdateData()
    if lastUpdateData == nil then -- buff不存在，返回无穷远
        return FP.Const.Max
    end
    local buffSourceEntity = lastUpdateData.SourceEntity
    -- 无buff来源 或者 自己给自己加的buff ，则距离为0
    if (not buffSourceEntity) or entity == buffSourceEntity then
        return FP.Const.Zero
    end

    --到目标的距离
    local disSqr = FP.V2.DistanceSqr(buffSourceEntity:GetLogicPos(), entity:GetLogicPos())
    return disSqr
end

return FuncNode_DistanceBuffSource