Рarametric modeling in the AUTOCAD environment in the study of technical disciplines

Abstract

Of great interest is the use of the AutoCAD graphic system in the search for new approaches to the study of various disciplines, where the visualization of the process of finding a solution is proportional to the perception of information by the course student (especially important for teaching graphic disciplines). Parametric drawing is a technology used in projects with dependencies, which are relationships and constraints on 2D geometry. And the dependency design stages make it possible to tighten the requirements when working with different design solutions or when making changes.Changes made to objects can lead to automatic adjustment of other objects and limit the ability to change distances or angular values. This article discusses the development of a module for the parametric construction of solid models for the AutoCAD 2022 graphic editor. The development is based on a universal algorithm for converting geometric models into parametric models based on the analysis of DXF files. The proposed approach makes it possible to decompose a complex solid-state model and generate parametric descriptions of individual graphical primitives that make up the model. The module is designed to extend the basic capabilities of parametric solid modeling implemented in the AutoCAD graphic editor in the form of dynamic blocks. One of the basic principles of modern information design is the use of various blocks, including parametric ones. This greatly speeds up and automates the process of creating project documentation in computer-aided design systems, such as AutoCAD. However, the main drawback of this tool is that it only supports surface models. The creation of solid parametric models using dynamic blocks is not provided in AutoCAD. The program was developed using the application programming interface of the AutoCAD graphic editor and implemented as a module of a universal automated information system. The module allows you to parameterize ready-made solid models to increase their reusability. The use of parametric models generated by the module makes it possible to analyze various design schemes in a short time and avoid fundamental design errors. The system was designed to maximize the modularity principle, which allows expanding its functionality as needed without significantly adjusting previously created modules.