BIM模型相连构件获取方法  

Acquisition Method of Connected Components in BIM Model

作　　者：苏鼎丁 王佳 周小平[1] Su Dingding;Wang Jia;Zhou Xiaoping(School of Electrical and Information Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Institute of Building Energy Conservation and Safety Monitoring,Beijing University of Civil Engineering and Architecture,Beijing 102616,China)

机构地区：[1]北京建筑大学电气与信息工程学院,北京100044 [2]北京建筑大学建筑节能与安全监控研究所,北京102616

出　　处：《土木建筑工程信息技术》2020年第2期1-6,共6页Journal of Information Technology in Civil Engineering and Architecture

基　　金：国家自然科学基金项目(编号:71601013);北京市自然科学基金项目(编号:4202017);北京市青年拔尖人才培育项目编号:(CIT&TCD201904050);北京建筑大学青年英才项目。

摘　　要：目前,由于BIM模型建立不规范和IFC文件解析时出现问题,从业者在获取相连构件时有一定困难,因此,本文提出了一种以改良的OBB包围盒碰撞检测算法为基础的相连构件查找方法。该方法首先获取任意两个构件的位置信息,再利用OBB包围盒算法构建包围盒,并对该包围盒进行检测,若包围盒的尺寸比构件的大,则构造该构件的OBB层次包围盒树,然后给其中一个构件的包围盒一偏移量,最后用碰撞检测算法检测两构件是否发生碰撞,若发生碰撞,则为相连构件,若未发生碰撞,则为不相连构件。At present,due to the non-standard establishment of BIM model and problems in IFC file parsing,practitioners have some difficulties in obtaining connected components.For this reason,this paper proposes a search method for connected components based on the improved OBB bounding box collision detection algorithm.This method firstly obtains the location information of any two components,and then create a bounding box by using the OBB algorithm for the next progress of detection.If the size of the bounding box is larger than that of the component,the OBB level bounding tree of the component is constructed.Given an offset to the bounding box of one component,then the collision detection algorithm is used to detect whether the two components collide.In case of collision,the two components are connected components,otherwise they are disconnected components.

关 键 词：建筑信息模型(BIM) 构件关系 方向包围盒(OBB) 碰撞检测 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] TU17[自动化与计算机技术—计算机科学与技术]