Self-adaptive BIM modeling method based on door and window CAD planar graph

The invention discloses a self-adaptive BIM modeling method based on a door and window CAD plane graph. The method comprises the steps that S1, inputting a processed door and window profile drawing and the thickness of a door and window frame; S2, performing initialization processing on the door and window profile diagram; S3, layering the contour lines; S4, grouping the contour lines; S5, processing the overlapped doors and windows; S6, determining the type of the door and window frame represented by each layer of contour line in each curve group; and S7, stretching or extruding each layer of contour line according to the expressed thickness of the door and window frame through three-dimensional software, and modeling a three-dimensional door and window model. The automatic door and window modeling efficiency can be improved. 本发明公开了一种基于门窗CAD平面图的自适应BIM建模方法，包括：S1、输入处理过的门窗轮廓图图纸，以及门窗框的厚度；S2、对门窗轮廓图初始化处理；S3、对轮廓线分层；S4、对轮廓线分组；S5、对有重叠的门窗进行处理；S6、确定每个曲线组中每层轮廓线表示的门窗框的类型；S7、通过三维软件将每层轮廓线根据表示的门窗框的厚度拉伸或挤出，造型为立体的门窗模型。本发明有利于提