Model component clicking method and device, computer equipment and storage medium

Abstract

The invention discloses a model component clicking method and device, computer equipment and a storage medium. The method comprises the steps of loading model grid data of a building information modelinto a video memory of a GPU end, and generating a component ID for each component; rendering the component ID on the texture map in a color mode; when the corresponding component on the screen is clicked, obtaining the component ID by reading the color value corresponding to the texture coordinate of the clicked position in the texture map, and finally determining the selected component. According to the method, the characteristics of texture mapping record data are utilized, calculation is focused on a GPU end through GPU rendering, the component click performance is irrelevant to the modelscale, memory consumption is reduced and controllable, and the method can be operated on a browser end WebGL.

Description

technical field [0001] The invention relates to the technical field of building information technology, in particular to a method, device, computer equipment and storage medium for selecting model components. Background technique [0002] WebGL is a 3D drawing standard that allows the scripting language Javascript to be combined with the coloring language GLSL, and WebGL has already been supported by major browsers. The emergence of WebGL makes it no longer necessary to display 3D effects on the browser without the support of browser plug-ins. It directly uses the underlying hardware acceleration to render graphics, providing developers with the same efficient graphics rendering speed as traditional 3D desktop applications. [0003] Building Information Modeling (Building Information Modeling, referred to as BIM) technology is based on the relevant information data of construction projects, through digital information simulation to simulate the real information of the buildi...

AI Technical Summary

Problems solved by technology

However, for super-large models, due to the large number of components and triangles in the scene display, clicking on a certain component will cause performance problems and cannot be quickly selected.

[0005] The existing general engines such as Unity and UE basically provide a point selection method based on ray detection. Although this point selection method is extensive, it has the following problems: 1) All calculations are performed on the CPU side, and must Affects the performance of program logic to a certain extent

2) In the case of a very large model with many components and many triangular faces, the click operation will have a non-negligible performance overhead

3) The solution based on ray detection needs to record a piece of vertex data in memory, which increases memory consumption

4) Considering the compatibility of browsers, Unity and UE based on the desktop are not suitable for browser applications based on WebGL

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