Method and system for interactively creating three-dimensional curve by use of perspective relation

Abstract

The invention provides a method for interactively creating a three-dimensional curve by use of a perspective relation. The method comprises the following steps: according to a design intention, drafting a two-dimensional sketch curve; performing stroke structuring on the contour strokes of the two-dimensional sketch curve to obtain a structured two-dimensional sketch curve; performing intention identification on the structured two-dimensional sketch curve; and according to an identification result, creating the three-dimensional curve of the structured two-dimensional sketch curve. According to the invention, the perspective relation and a symmetry relation are utilized for recovering three-dimensional coordinates of the two-dimensional sketch curve, and the convenience of two-dimensional sketch drafting and the advantages of three-dimensional space dynamic observation are combined together, such that the application of design personnel is facilitated, the design personnel can smoothly carry out design work and rapidly solidify creative thinking, the space feeling of the user is enhanced, and at the same time, a three-dimensional frame model can effectively support a detailed design process. The invention further brings forward a system for interactively creating a three-dimensional curve by use of a perspective relation.

Description

technical field [0001] The invention relates to the technical field of computer graphics, in particular to a method and system for interactively creating three-dimensional curves using perspective relationships. Background technique [0002] With the development of computer graphics technology, 3D models have become the mainstream of current engineering applications. It not only expands the functional space of design creativity, surpasses the performance limitations of traditional two-dimensional design technology, but also shortens the space interval between product design, modeling, appreciation and production. There are two main methods for creating 3D models: parametric modeling and reverse engineering. Parametric modeling is the use of commercial 3D modeling systems such as Maya and AutoCAD to construct 3D models by setting and adjusting parametric or variable models of basic geometry. The functions of these systems are basically to provide users with detailed design ...

AI Technical Summary

Problems solved by technology

Although the traditional two-dimensional sketch drawing method can quickly solidify the designer's ideas, due to the lack of spatial expression ability, the designer needs to draw multiple views to express the design, and at the same time, the views from all angles must ensure the consistency of size and direction Only in order to rebuild the design in the human brain, it is not conducive to modification and reuse

2D sketches are not easy to express complex surfaces, and there is always a gap in interaction and interpretation with subsequent 3D modeling

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