A Convenient Generation Method of 3D Solid Model Based on 2D Hand-drawn Line Drawing

Abstract

The convenient generation method of 3D solid model based on 2D hand-drawn line drawing includes the following three steps: 1) The designer manually draws the parallel projection line drawing of the solid model to be reconstructed on the design board according to the predefined hand-drawn line input rules ; Then the designer uses two-dimensional hand-drawn line drawing to specify which vertices constitute all the surface information of a surface, and designate the initial vertex as the cube corner. 2) Starting from the initial cube corner, based on the assumption that the 2D line drawing is the parallel projection of the 3D model, and according to the cube corner theory, gradually restore the 3D coordinate information of all vertices. 3) According to the designer's input information, identify all planes and curved surfaces on the three-dimensional solid, perform mesh triangulation on the polygonal surface, strip surface, hollow inner cylinder or hollow polygonal surface on the model, and output the three-dimensional solid Model. The invention provides a method for accurately generating a three-dimensional complex entity with simple operation, convenience and quickness, and rich shapes.

Description

technical field [0001] The patented design of the present invention provides a method for conveniently and quickly generating a three-dimensional solid model for the two-dimensional hand-drawn line drawing input by the designer. Background technique [0002] In the field of computer-aided design, the research on the related technology of generating 3D solid model according to the 2D hand-drawn line drawing input by the designer has been paid more attention. Before constructing a 3D solid model, the designer often manually draws the 2D projection line drawing of the solid model on the 2D design board according to the design and functional requirements, and the computer can directly and accurately reconstruct the 2D line drawing Get the 3D solid model of the target. The research of this kind of technology can enable designers to conveniently generate various solid models according to their own design ideas, so as to get rid of the cumbersome process of operating very professi...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the existing 3D solid model generation, such as complicated operation, inaccurate reconstruction results, and simple and single types of 3D solid models generated by reconstruction, according to the 2D hand-drawn line drawing designed by the designer, the present invention provides a A simple, convenient and fast method for the precise generation of 3D complex entities with rich shapes

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