A Modeling Method of Product Physical Properties Based on Accurate Voxelization of STL Model

Abstract

The invention discloses a product physical property modeling method based on precise voxelization of an STL model, which can obtain precise voxelization expression of the STL model under the conditionof ensuring high resolution, and realize balance between resolution and memory space. The method comprises the following steps: establishing a photocuring three-dimensional modeling STL model of a product, and performing geometric data extraction and topological relation reconstruction on the STL model to obtain boundary representation method Brep data of the STL model; calculating the bounding box size of the STL model; and generating cubic units layer by layer in a bounding box of the STL model, and performing Boolean intersection operation on the generated cubic units and a model represented by the Brep data to obtain voxel units at corresponding positions to form a voxel model. Brep data of the voxel model are extracted, additive information is added, and a precise voxel model is obtained. And carrying out additive manufacturing by adopting a precise voxelization model.

Description

technical field [0001] The invention relates to the technical field of product three-dimensional modeling, in particular to a product physical property modeling method based on accurate voxelization of an STL model. Background technique [0002] With the development of virtual reality, additive manufacturing, 3D simulation, terrain simulation, 3D games and other technologies, in terms of 3D modeling of products, the requirement for full physical information modeling is becoming more and more obvious. However, the traditional computer-aided design (Computer Aided Design, CAD) system to represent the solid model is mainly based on three modeling methods: decomposition representation, construction representation and boundary representation, these modeling methods can only represent the outer surface information of the object, Physical information such as color and material cannot be displayed. [0003] In order to make up for the shortcomings of the traditional CAD modeling me...

AI Technical Summary

Problems solved by technology

However, these currently existing methods (collectively referred to as general voxelization methods) are only approximate voxelization of the model. Both internal voxel units and boundary voxel units are represented by cubes, which will Causes a contradiction between model accuracy and storage capacity

The larger the resolution, that is, the larger the number of voxels, the closer the voxel model is to the original model, but the storage capacity is greatly increased, which affects the operational performance of the model; and if the resolution is reduced, the step effect at the boundary of the voxel model will be reduced. Increase, reduce the accuracy of the model, and affect both appearance and model data processing

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