Procedural generation and real-time rendering of a marine ecosystem  

作　　者：Rong LI Xin DING Jun-hao YU Tian-yi GAO Wen-ting ZHENG Rui WANG Hu-jun BAO 

机构地区：[1]State Key Lab of CAD & CG, Zhejiang University [2]PLA Unit 61741

出　　处：《Journal of Zhejiang University-Science C(Computers and Electronics)》2014年第7期514-524,共11页浙江大学学报C辑（计算机与电子（英文版）

基　　金：Project supported by the Zhejiang Provincial Natural Science Foundation of China(No.LY13F020002);the National Natural Science Foundation of China(No.61272301);the National Key Technology R&D Program of China(No.2012BAH35B03);the Fundamental Research Funds for the Central Universities,China

摘　　要：Underwater scene is one of the most marvelous environments in the world. In this study, we present an efficient procedural modeling and rendering system to generate marine ecosystems for swim-through graphic applications. To produce realistic and natural underwater scenes, several techniques and algorithms have been presented and introduced. First, to distribute sealife naturally on a seabed, we employ an ecosystem simulation that considers the influence of the underwater environment. Second, we propose a two-level procedural modeling system to generate sealife with unique biological features. At the base level, a series of grammars are designed to roughly represent underwater sealife on a central processing unit(CPU). Then at the fine level, additional details of the sealife are created and rendered using graphic processing units(GPUs). Such a hybrid CPU-GPU framework best adopts sequential and parallel computation in modeling a marine ecosystem, and achieves a high level of performance.Third, the proposed system integrates dynamic simulations in the proposed procedural modeling process to support dynamic interactions between sealife and the underwater environment, where interactions and physical factors of the environment are formulated into parameters and control the geometric generation at the fine level. Results demonstrate that this system is capable of generating and rendering scenes with massive corals and sealife in real time.Underwater scene is one of the most marvelous environments in the world. In this study, we present an efficient procedural modeling and rendering system to generate marine ecosystems for swim-through graphic applications. To produce realistic and natural underwater scenes, several techniques and algorithms have been presented and introduced. First, to distribute sealife naturally on a seabed, we employ an ecosystem simulation that considers the influence of the underwater environment. Second, we propose a two-level procedural modeling system to generate sealife with unique biological features. At the base level, a series of grammars are designed to roughly represent underwater sealife on a central processing unit（CPU）. Then at the fine level, additional details of the sealife are created and rendered using graphic processing units（GPUs）. Such a hybrid CPU-GPU framework best adopts sequential and parallel computation in modeling a marine ecosystem, and achieves a high level of performance.Third, the proposed system integrates dynamic simulations in the proposed procedural modeling process to support dynamic interactions between sealife and the underwater environment, where interactions and physical factors of the environment are formulated into parameters and control the geometric generation at the fine level. Results demonstrate that this system is capable of generating and rendering scenes with massive corals and sealife in real time.

关 键 词：Procedural generation Marine ecosystem Biological feature Graphic processing unit acceleration 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]