Engine Integration Using WebGL Depth Buffer and Rendering Method for Digital Twin Models

In recent years, with the continuous development of digital twin technology, its application scope has become increasingly widespread across various fields. Currently, static WebGIS applications built on the open-source 3D mapping framework Cesium fail to effectively showcase the dynamic process of model changes and struggle to seamlessly integrate models with environmental elements, thereby limiting the flexibility and applicability of digital twin applications in practical construction. To address this issue, this paper proposes an engine integration method based on depth buffering, aiming to achieve a depth integration between Cesium and general 3D rendering engines, thereby effectively enhancing Cesium’s model rendering capabilities in WebGIS application development. Furthermore, through in-depth exploration of graphic rendering algorithms, we have designed scene visualization algorithms applicable to different environmental parameters, achieving effective integration of models with environmental elements and successfully simulating the process of model dynamic changes.