Three-dimensional model shielding body selecting method and system, computer equipment and readable medium

Abstract

The invention discloses a three-dimensional model shielding body selecting method and system, computer equipment and a readable medium. The method comprises the steps of loading a three-dimensional model; calculating an approximately-minimum bounding box of an object in a scene of the three-dimensional model; based on the approximately-minimum bounding box, obtaining a candidate shielding body set; calculating the weight of each candidate shielding body in the candidate shielding body set; according to the weights, ranking all the candidate shielding bodies, and selecting a certain number of candidate shielding bodies according to the order. By means of the three-dimensional model shielding body selecting method and system, the computer equipment and the readable medium, the problem that in an existing shielding body selecting method, selection of shielding bodies is often improper is solved, the problem that existing two shielding body selecting methods cannot adapt to large-scale complicated three-dimensional models can be effectively solved, and the shielding bodies can be more quickly and accurately selected out, so that the shielding and removing efficiency of the large-scalecomplicated three-dimensional models is obviously improved.

Description

technical field [0001] The invention relates to a method for selecting a three-dimensional model blocking body. More specifically, it relates to a method, system, computer equipment and readable medium for selecting a 3D model occluder. Background technique [0002] The 3D model of a complex product (such as the 3D model of the Boeing 777 aircraft) contains a large number of parts (tens of thousands to millions), and the occlusion relationship between the parts is complex, which makes real-time rendering difficult, and usually requires occlusion culling Technology to remove occluded (invisible) objects in real time to speed up drawing. [0003] There are mainly two methods for the selection of existing occluders: [0004] (1) Select objects with larger bounding spheres or axial bounding boxes in the scene. This method first calculates the bounding sphere or axial bounding box of each object in the scene, and then sorts them according to the size of the bounding sphere or ...

AI Technical Summary

Problems solved by technology

Using the volume of a bounding sphere or axial bounding box as an approximation of model size is extremely inaccurate

These irregularly shaped objects are less likely to occlude other objects in the scene, and are not suitable for being selected as occluders under any viewing angle

In addition, as the orientation of the object relative to the viewpoint changes, the occlusion relationship it constitutes to other objects will also change. The existing selection methods do not take this factor into account, and it is easy to select these irregularly shaped objects as occluders, resulting in culling low efficiency

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