Method for cutting and networking 3D TIN (triangulated irregular network) model and calculating volume

An irregular, modeled technique used in computing

Inactive Publication Date: 2018-11-23
BEIJING EZVIEW INFORMATION TECH CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the implementation of this method is to provide a method for 3DTIN irregular model cutting and network calculation and volume calculation, aiming at solving the demand for volume calculation of irregular shape models

Method used

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  • Method for cutting and networking 3D TIN (triangulated irregular network) model and calculating volume
  • Method for cutting and networking 3D TIN (triangulated irregular network) model and calculating volume
  • Method for cutting and networking 3D TIN (triangulated irregular network) model and calculating volume

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Embodiment Construction

[0029] The method will be described below in conjunction with specific drawings and specific implementation methods. For the convenience of expression and explanation, the intermediate steps of the method are especially output and displayed in the form of graphics.

[0030] 1. The process is as follows Figure 6 As shown, the first step is to input the original 3DTIN model file and the coordinates of each point of the section as parameters. When the method receives the input parameters (model data M and the coordinates of each point in the section), the input model is as follows: figure 1 shown. The model is a 3DS format model file, which contains 12312 points and 24546 triangle faces. The input section point coordinates are

[0031] (-27.0, 390.0, 30.0)

[0032] (-27.0, 410.0, 30.0)

[0033] (-90.0, 410.0, 40.0)

[0034] (-90.0, 390.0, 40.0)

[0035] (-60.0, 410.0, 33.0)

[0036] (-60.0, 390.0, 33.0)

[0037] The method should first construct a network of section po...

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Abstract

The purpose of the method is to provide a method for cutting and networking a 3D TIN (triangulated irregular network) model and calculating volume, in order to meet the volume calculation needs of anirregular shape model. The method is characterized in that: a cutting model part is judged by taking the normal vectors of a cutting surface as the judging standard; the exact volume of a vertebral body formed by each triangular patch and the origin is calculated accurately by taking the normal vector and vertex of the triangular patch as parameters; and the total volume is obtained by accumulation. Advantages of this method are compared with the existing method, this method can more accurately judge the model that a user needs, as well as more accurately calculate the model volume.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to three-dimensional reconstruction technology. Background technique [0002] With the continuous development of science and technology, especially virtual reality technology in recent years. 3D modeling technology is becoming more and more popular in various fields. 3D modeling software is also becoming more and more popular, making people's demand for 3D modeling technology increasing. Under the background of the continuous popularization of 3D model technology, the present invention comprehensively analyzes the calculation of the volume of 3DTIN irregular models by domestic and foreign software. Most of the volume algorithms provided by similar software are based on the rasterization of 3DTIN irregular models, and then calculate The elevation of the 3DTIN irregular model points in the grid to the ground is calculated to calculate the model volume obtained by accumulating the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/10G06T19/00
CPCG06T17/10G06T19/006
Inventor 张萌之
Owner BEIJING EZVIEW INFORMATION TECH CO LTD
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