Research on Cable Modeling and Calculation Method Based on Revit Secondary Development

At present, the field of electromechanical pipelines mainly relies on CAD drawings to express design information and carry out project costing, but the two-dimensional drawings cannot well express the specific layout of cable lines and are not accurate enough for quantity calculation. In addition, although the method of establishing 3D BIM model of MEP pipeline and carrying out costing is feasible, the model establishment process is complicated and tedious, and the overall efficiency is low. This paper researches and develops a Revit-based cable modeling and costing program, which splits the tedious and repetitive cable modeling work and automates it by breadth-first search algorithm, CAD drawing flip model and ray collision algorithm, and automatically performs quantity statistics based on the costing parameters of the pipeline exported from the 3D model. Finally, the feasibility of the program is verified by an engineering example. The experimental result prove that the method can significantly improve the work efficiency of designers and cost personnel, and to a certain extent, optimize the cable path, reduce the amount of cable consumption, and save costs.