Patch reduction processing system and processing method used for 3D model

Abstract

Provided is a patch reduction processing system used for a 3D model, comprising a model import module, an optimized analysis and decision module, a space geometrical mapping reconstruction module, a normal reconstruction module, an envelope patch calculating module, an interpolation processing module, a data packaging module model, and a 3D model output module. The invention also discloses a patch reduction processing method used for a 3D model. According to the invention, the patch reduction effect changes less even the number of triangular patches is reduced under 30,000; meanwhile, the method employs space geometrical mapping reconstruction and normal reconstruction information, separates vertex data from normal data, and guarantees the integrity and high simulation reduction of non-continuous change information after patch reduction; besides, the method can perform suitable automatic matching patch reduction according to actual display needs.

Description

technical field [0001] The invention relates to the field of 3D model processing, in particular to a surface reduction processing system and processing method for 3D models. Background technique [0002] In 3D model rendering, the object is composed of 3D triangular faces, and the hardware GPU performs rendering and calculation based on each triangular face. Therefore, the more triangles there are, the more calculations the GPU needs to perform. Therefore, in order to ensure high efficiency and high frame rate in 3D model rendering, it is necessary to reduce the number of triangles. At the same time, 3D models will inevitably be generated using a large number of other professional modeling tools, and even professional 3D scanning equipment. more than three triangle faces. As far as the current mainstream GPU rendering is concerned, if the number of patches exceeds 10W, there will be obvious freezes, resulting in a decline in the user experience of 3D scenes. [0003] To ...

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Problems solved by technology

[0009] 1. When the number of faces is reduced from hundreds of thousands to thousands of faces, the effect of face reduction changes greatly, and the visual error is large after face reduction

[0010] 2. Ordinary surface reduction algorithms mainly focus on spatial geometric dimension information as the basis for surface reduction, while common 3D model information includes not only point positions, but also information such as normals and textures, especially when these information are not continuous in 3D space In the case of changes, there is a serious aliasing caused by the lack of relevant information after a large area reduction

[0011] 3. It is impossible to carry out suitable automatic matching and surface reduction according to the actual display needs

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