关键词: 程序化建模, 虚拟场景, 中国风古建筑, 细分算法

Abstract: In response to the requirements for large-scale, easily modifiable virtual scenes in areas such as virtual reality, 3D simulation, and video games, and to address the inefficiencies and difficulties in modifying traditional scene creation methods, this paper proposes a novel procedural generation method for large virtual scenes. Initially, by leveraging the advantages of procedural modeling, realistic terrain is generated, city boundaries are determined, and digital assets of Chinese-style buildings, such as pavilions, courtyards, and arch bridges, are constructed. B-spline curves are employed to shape the flying eaves in the construction of Chinese buildings. Subsequently, an improved subdivision algorithm is utilized, incorporating random interpolation factors in each iteration to generate a more rational road network layout. Different types and styles of buildings are allocated based on the characteristics of the resulting blocks. This method employs a procedural dependency graph to manage digital assets, automatically handling the dependencies between various assets. Finally, the automatic generation and interactive roaming of the scene are realized through the Unreal Engine. Experimental results demonstrate that the improved subdivision algorithm employed in this method produces a more uniform urban layout and a more balanced variety of blocks compared to other algorithms. Moreover, compared to traditional virtual scene creation methods, this approach significantly reduces the time required for 3D asset generation, optimizes the workflow, and enables creators to efficiently produce richly detailed and immersive virtual scenes in a traditional Chinese style.

Key words: procedural modeling, virtual scene, ancient Chinese architecture, subdivision algorithm