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研究生： 林明杰
Ming-Je Lin
論文名稱： 在叢集電腦上平行彩繪多重解析度模型
Parallel Rendering for Multiresolution Models on PC Cluster
指導教授： 曾定章
Din-Chang Tseng
口試委員:
學位類別： 碩士
Master
系所名稱： 資訊電機學院 - 資訊工程學系
Department of Computer Science & Information Engineering
畢業學年度： 90
語文別： 英文
論文頁數： 103
中文關鍵詞： 彩繪 、多重解析度 、平行 、叢集電腦
外文關鍵詞： Parallel Rendering, Multiresolution, PC Cluster
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    • 本論文提出一個平行彩繪 (parallel rendering) 系統的架構，並利用此系統來完成多重解析度模型的彩繪工作，尤指資料量龐大或複雜度高的精細模型。該平行彩繪系統乃是採用分散式系統的網路架構，並在叢集電腦 (PC cluster) 上實作而成。
    在該平行彩繪系統中，各電腦之間以100Mbps的乙太網路相連結，同時利用我們發展的通訊協定，透過Winsock來達到資訊的交換，以提供處理大量資料時所需的運算能力與記憶體空間。
    我們的平行彩繪系統所採用的影像平行演算法是sort-last演算法，該演算法可以提供較佳的擴充性，以利後續的研究發展。同時我們也採用OpenGL來完成實際彩繪的工作。
    我們的平行彩繪系統支援離散性多重解析度 (discrete multiresolution) 的模型彩繪，以更進一步提昇彩繪的效率。

    A parallel rendering system is presented to render multiresolution models on a PC cluster. The system provides great memory capacity and calculation power for real-time visualization on large-amounted data such as terrain models.
    The rendering system is implemented on a distributed architecture; all PCs in the cluster is connected by a 100Mbps Ethernet network. The information are exchanged using the protocol that we developed through Winsock to achieve the cooperation.
    The parallel rendering algorithm is adopted from the sort-last strategy due to its high scalability and the rendering algorithm is implemented by OpenGL library.
    The parallel rendering system supports the parallel rendering for discrete multiresolution models to improve the rendering performance.

    Abstract ii Contents iii List of Figures vi List of Tables ix Chapter 1 Introduction 1 1.1 Motivation 1 1.2 System overview 2 1.2.1 System architecture 2 1.2.2 System diagram 4 1.3 Thesis organization 5 Chapter 2 Related Work 6 2.1 Introduction to massive computing system 6 2.2 Massive computing systems for 3D computer graphics 8 2.2.1 The hardware of the massive computing system 8 2.2.2 The applications on 3D computer graphics 10 2.3 Two methods of parallel rendering 11 2.4 Parallel rendering on different hardware architectures 12 Chapter 3 Parallel Rendering 14 3.1 Parallelism in the rendering process 14 3.1.1 Functional parallelism 15 3.1.2 Data parallelism 16 3.1.3 Temporal parallelism 18 3.1.4 Hybrid approaches 19 3.2 Algorithmic concepts 20 3.2.1 Coherence 21 3.2.2 Task and data decomposition 22 3.2.3 Scalability 24 3.2.4 Load balancing 25 3.2.5 Object-space to image-space mapping 29 3.3 Design and implementation issues 31 3.3.1 Hardware versus software systems 32 3.3.2 Communication 34 3.3.3 Image assembly and display 38 Chapter 4 Basic Implementation 44 4.1 Network issues 44 4.1.1 Sockets 44 4.1.2 Network capacity 45 4.2 System initialization 45 4.3 Partitioning strategy 46 4.3.1 Sort-last implementation 46 4.3.2 Improvement for network load on image data 48 4.3.3 Improvement for network load on control message 49 4.4 Image composition 50 Chapter 5 Advanced Implementation 53 5.1 More RPCs 53 5.2 Multiresolution model 55 Chapter 6 Experiments 56 6.1 Models 56 6.2 Experimental results 57 6.2.1 Operations on RPC 57 6.2.2 Operations on CPC 59 6.2.3 Browsing displays 61 6.3 Performance evaluation 65 Chapter 7 Conclusions and Future Work 71 7.1 Powerful hardware 71 7.2 Other technology 71 7.3 Other model formats 73 7.4 Different system architecture 73 7.5 Different work amount of RPC 74 References 75

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