Method and device for displaying any cross section of geometric body, and electronic device

Abstract

The invention discloses a method and a device for displaying any cross section of a geometric body, which are used for solving the problems of geometric body cutting efficiency and cross section filling flexibility. According to the scheme, the method comprises: the normal vector of a cutting plane is calculated according to input geometry data and cutting plane parameters, the distance between each vertex of each basic primitive of the geometry and the cutting plane is calculated, then rasterization is conducted on the basic primitives, and the distance between each primitive segment and thecutting plane is obtained through linear interpolation; when each basic primitive is colored, a primitive segment with the distance larger than 0 is colored on the front face, then coloring is carriedout on the back face of the basic primitive, and in the back face coloring process, an original normal vector of the basic primitive is replaced with a normal vector of a cut plane. Therefore, profile filling, display of any cross section and profile filling are achieved, and the cutting operation efficiency and the profile filling flexibility are high.

Description

technical field [0001] The invention relates to a three-dimensional graphics technology in the field of engineering and construction, in particular to a method, a device and an electronic device for cutting and coloring a geometric body and displaying an arbitrary section of the geometric body. Background technique [0002] Due to the detailed geometric description of building components and their structural relationships, complex 3D building models have increasingly appeared in the field of engineering and building information applications. However, the intricate component relationships in the model hinder the rapid cognition of its structure. The three-dimensional cut-away drawing can be used to express the structural form, layering situation, and internal structure of the building in the vertical direction, and is one of the indispensable and important drawings in the building construction drawing. One purpose of 3D cutting is to intercept a small piece of a larger model ...

AI Technical Summary

Problems solved by technology

[0003] For the sectioning of any geometric body, if the clipping plane is geometrically intersected with the clipped geometry, it will bring a large number of intersecting operations, which will affect the efficiency of real-time display

Although modern graphics pipelines package and solidify graphics clipping solutions, this solution cannot customize the visualization requirements of the clipped section. On the one hand, it cannot fill the section, and on the other hand, it cannot change the color of the filled material.

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