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Method for sorting fragments and method, system, equipment and medium for rasterization of model

A technology of fragments and 3D models, applied in image data processing, instruments, calculations, etc., can solve problems such as inappropriate use of panoramic viewpoints, slowness, etc., and achieve the effects of making up for missing areas, streamlining the number of processes, and realizing the process

Pending Publication Date: 2020-05-12
SHANGHAI JIETU TIANXIA NETWORK SCI & TECH
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  • Application Information

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Problems solved by technology

However, the traditional picking process is a slow and dynamic process, and most of them are aimed at the common view frustum, which is not suitable for the use scene of panoramic view

Method used

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  • Method for sorting fragments and method, system, equipment and medium for rasterization of model
  • Method for sorting fragments and method, system, equipment and medium for rasterization of model

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Embodiment Construction

[0083] In order to make the purpose and technical solutions of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0084] It should be noted that although a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than here.

[0085] figure 1 A flowchart showing a method for picking fragments in a 3D model according to the first embodiment of the present invention.

[0086] like figure 1 As shown, method 1...

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Abstract

The invention relates to the technical field of data acquisition, in particular to a method for sorting fragments and a method, a system, equipment and a medium for rasterization of a model. The method comprises the following steps: establishing a longitude and latitude grid taking a viewpoint as a center, and respectively emitting sight rays from the viewpoint through each grid node in the longitude and latitude grid; based on the distance between each region block in the three-dimensional model and the viewpoint, determining an LOD hierarchy corresponding to each region block; for all fragments in each region block, reserving fragments visible to the line-of-sight rays corresponding to the fragments on the corresponding LOD hierarchy. According to the invention, accurate quantitative calculation in the fragment sorting process is fuzzified on the basis of guaranteeing the result reliability, a large number of calculation processes are reduced, the efficiency is high, and the method can be used for rasterization of a three-dimensional model, simplification of a visible area of the three-dimensional model and the like.

Description

technical field [0001] The present invention relates to the technical field of data collection, in particular to a method for picking fragments and a method, system, device and medium for rasterizing a model. Background technique [0002] The traditional 3D model rasterization method is relatively inefficient, and usually needs to traverse all the fragments in the 3D model. However, because most of the fragments in the 3D model are not projected into the virtual panorama, there is redundancy in the calculation process. For example, in actual testing, only a few thousand fragments were used out of millions of fragments. [0003] Although the 3D engine has a selection process during the loading process of the 3D model, in order to reduce the fragments involved in the budget. However, the traditional picking process is a slow and dynamic process, and most of them are aimed at the common view frustum, which is not suitable for the use scene of the panoramic viewpoint. Conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/00
CPCG06T3/08
Inventor 赵航
Owner SHANGHAI JIETU TIANXIA NETWORK SCI & TECH
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