Automatic Surface Complementing Method of Cutting Contour Based on Triangular Mesh Model

Abstract

The invention discloses a method for automatically complementing a cut contour based on a triangular mesh model, comprising: establishing a three-dimensional topological data structure, recording the geometric information and topological information of the three-dimensional model; defining a cutting path and a cutting direction on the projection surface of the three-dimensional model , automatically generate the cutting surface of the 3D model; intersect the cutting surface with the triangular faces constituting the object to form a discrete line segment set; track and fit the discrete line segment set on the cutting surface to obtain the closed contour line of the object and determine the contour Containment relationship of lines; triangulation is performed on the enclosing area of ​​closed contour lines to generate a section view of the entity. The method of the present invention realizes the entity section of the three-dimensional model in the virtual reality environment, automatically complements the surface, and inherits the material, and can not only describe the entity section of the three-dimensional model accurately and visually in the virtual reality environment, but also inherit the texture of the material relatively accurately, and At the same time, it has good real-time performance.

Description

technical field [0001] The invention relates to the technical field of computer graphics and image processing, in particular to a method for automatically supplementing a cut contour based on a triangular mesh model. Background technique [0002] The triangular mesh model in the 3D model has many good geometric properties, it can use multiple facets to approximate the surface of complex shapes, and is easy to handle, so the triangular mesh model is widely used in computer graphics, mechanical simulation, scientific computing visualization etc. The section outline is an important feature of the 3D model, which represents the general outline and geometric shape of the model at a certain position, and reflects the basic appearance of the 3D model. Cutting the 3D surface model refers to cutting the 3D model in any direction directly on the screen, and the user can easily observe the size and shape of the model section to achieve a macroscopic understanding of the model section....

AI Technical Summary

Problems solved by technology

This method has good applicability to models with topological errors, but this method does not consider the inheritance of material textures when patching surfaces in the process of obtaining closed section contour rings

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