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

Abstract

The invention discloses a model component clicking method, device, computer equipment and storage medium. The method generates a component ID for each component by loading the model grid data of the building information model into the display memory of the GPU; renders the component ID on the texture map in the form of color; when clicking the corresponding component on the screen, , by reading the color value corresponding to the texture coordinate of the clicked position in the texture map to obtain the component ID, and finally determine the selected component. The invention utilizes the characteristics of texture map recording data, and puts the focus of calculation on the GPU side through GPU rendering, realizes that the performance of component selection has nothing to do with the scale of the model, saves memory consumption and is controllable, and can run on the browser side WebGL .

Description

technical field [0001] The invention relates to the technical field of building informatization, in particular to a model component selection method, device, computer equipment and storage medium. Background technique [0002] WebGL is a 3D drawing standard that allows the scripting language Javascript to be combined with the shading language GLSL, and WebGL is already supported on all major browsers. The emergence of WebGL makes displaying 3D effects on the browser no longer require 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 (BIM) technology is based on various relevant information data of construction projects, simulates the real information of buildings through digital information simulation, and realizes project supervision, property management through three-dim...

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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