3D model rendering display method and system

A technology of three-dimensional model and display method, applied in the direction of digital output to display device, image data processing, 3D image processing, etc.

CN106296779AActive Publication Date: 2017-01-04LINKTECH NAVI TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-01-04

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Abstract

The invention relates to a 3D model rendering display method. The 3D model rendering display method comprises steps of determining whether a root node of each sub-block in an established 3D model is visible according to position information of a current viewpoint; partitioning the 3D model according to a three-dimensional coordinate direction into a plurality of sub-blocks, wherein each sub-block generates a corresponding adaptive tree LOD according to a hierarchy and data quantity information of each; according to the self-adaptive tree LOD, performing recursive traversal on a sub-tree from a visible root node and performing LOD visibility determination on all nodes under the root node; performing visibility determination and LOD accuracy test on all nodes under the root node layer by layer according to the hierarchy to obtain a corresponding hierarchy of a node which satisfies visibility and an LOD accuracy requirement; loading model data corresponding to the hierarchy satisfying the requirements; and rendering and displaying the 3D model. The invention also discloses a 3D model rendering display system, which solves defects of the LOD strategy in the prior art.
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Description

technical field

[0001] The invention relates to the field of computer network communication, in particular to a three-dimensional model rendering display method and a three-dimensional model rendering display system. Background technique

[0002] When rendering a 3D model, it is generally necessary to request and render the 3D model data step by step from coarse to near, from low level to high level; when the 3D model is relatively fine, the requirements for network speed and memory are relatively high, otherwise it is very It is difficult to achieve a smooth effect, so in the prior art, remote browsing of 3D models is often realized through browser controls or client software, that is, users need to install plug-ins or software.

[0003] However, with the development of html5 and WebGL, it becomes possible to browse 3D models directly on the browser. WebGL is a technology that uses JavaScript API to present 3D computer graphics. Unlike the past, browser plug-ins need to be...

Examples

Embodiment Construction

[0074] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0075] Combine below Figure 3 to Figure 6 To describe in detail the specific implementation of the 3D model rendering and display method of the present invention, explain how to perform 3D model rendering and display:

[0076] image 3 It shows a schematic flowchart of a method for rendering and displaying a 3D model provided by an embodiment of the present invention, including:

[0077] Step S300: According to the position information of the current viewpoint, ...