Automatic generation of 3D models based on architectural drawings

Due to the high complexity of architectural drawings and the uncertainty of the drawing situation, there is no perfect method to build 3D models based on architectural drawings to meet the needs of all applications, and there are many problems in the generation of 3D model data and the integration of existing models. In this paper, for the first time, the geometric characteristics and geometric relationships of line types in construction structure drawings (CSDs) are analyzed and studied, and a method for identifying architectural elements in floor plans based on line types is proposed, and the construction of 3D models is completed. Using the feature that space is the smallest unit in the building space information model, the constitutive relationship between each building element that constitutes the space can be found. The algorithm uses graph theory to construct undirected weighted graph, describes the 3D spatial location of the building by identifying the geometric information of the lines in the construction structure drawing(CSD), and generates the corresponding 3D model based on the stored geometric data. The experimental results prove that the 3D building model can be generated quickly and accurately after effective construction structure drawing detection.