Improvement of Model Simplification Algorithm Based on LOD and Implementation of WebGL

With the continuous progress of computer graphics, virtual reality and other technologies, 3D models in the field of industrial production have become more and more sophisticated, and the triangular surfaces need to be rendered are more than one million, which poses a great challenge to the storage, transmission and computing power of computers. Therefore, in order to adapt to the current performance of the computer while taking into account the rendering effect of the model, the Level-of-Detail(LOD) technology has been spawned. Industrial models tend to have complex structures and need to be displayed accurately in the rendering process, and in the case of a large number of holes in the model, the common algorithm is difficult to maintain the topology of the model well. Therefore, the article uses the edge collapse algorithm. To improve it, an algorithm that uses the mean deviation to guide the simplification process of edge collapse is proposed. While ensuring sufficient triangular mesh simplification, the topology of complex industrial models is maintained.