DOCTORAATSPROEFSCHRIFT - EDM - UHasselt

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$Reflectance Model for Diffraction - EDM - UHasselt$

vi CONTENTS 1.3 Interaction Classes . . . . . . . . . . . . . . . . . . . . . . . . . 19 1.4 State Synchronization and Distributing Simulation . . . . . . . 20 1.4.1 Distribution Architectures . . . . . . . . . . . . . . . . . 21 1.4.2 Distributing Simulation . . . . . . . . . . . . . . . . . . 22 2 A Brief Historical Overview 27 2.1 NVE systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 2.2 User Embodiments . . . . . . . . . . . . . . . . . . . . . . . . . 34 II MODELING DYNAMIC VIRTUAL INTERACTIONS 37 3 Introduction 41 4 Related Work 45 5 A Dynamic Interactive Object System 49 5.1 Dynamic Interactions . . . . . . . . . . . . . . . . . . . . . . . . 49 5.2 Interactive Objects and Dynamic Worlds . . . . . . . . . . . . . 50 5.2.1 Object Properties . . . . . . . . . . . . . . . . . . . . . 52 5.2.2 Interaction Properties . . . . . . . . . . . . . . . . . . . 53 5.2.3 Object Behaviors . . . . . . . . . . . . . . . . . . . . . . 54 5.2.4 The interactive Object and World Description Formats 56 5.3 The Interaction Layer . . . . . . . . . . . . . . . . . . . . . . . 57 5.4 Network Distribution and Simulation for NVEs . . . . . . . . . 62 5.5 Evaluation of the Interactive Object approach . . . . . . . . . . 64 5.5.1 A Simple Controller Example . . . . . . . . . . . . . . . 64 5.5.2 Discussion of Examples . . . . . . . . . . . . . . . . . . 65 5.5.3 Evaluating Interactive Objects in an Existing NVE . . . 66 6 Conclusions 71 III CREATING MORE REALISTIC DYNAMIC ENVI- RONMENTS 73 7 Introduction 77 8 Related Work 81 8.1 Character Animation . . . . . . . . . . . . . . . . . . . . . . . . 81 8.1.1 Keyframe Animation . . . . . . . . . . . . . . . . . . . . 82
CONTENTS vii 8.1.2 Inverse Kinematics . . . . . . . . . . . . . . . . . . . . . 83 8.1.3 Dynamic Animation Techniques . . . . . . . . . . . . . 84 8.2 Rigid Body Simulation in Real-time Virtual Environments . . . 85 9 The ExtReAM Library: Extensible Real-time Animations for Multiple Platforms 89 9.1 System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 89 9.1.1 Plug-in System . . . . . . . . . . . . . . . . . . . . . . . 90 9.1.2 Plug-in Components . . . . . . . . . . . . . . . . . . . . 91 9.1.3 Object Management . . . . . . . . . . . . . . . . . . . . 92 9.2 Plug-in Examples . . . . . . . . . . . . . . . . . . . . . . . . . . 92 9.2.1 Rigid Objects, Bodies and Physical Simulation . . . . . 92 9.2.2 Skeleton Animation System . . . . . . . . . . . . . . . . 93 9.3 Evaluation of the ExtReAM library . . . . . . . . . . . . . . . . 97 9.3.1 Desktop Evaluation . . . . . . . . . . . . . . . . . . . . 97 9.3.2 PocketPC Evaluation . . . . . . . . . . . . . . . . . . . 98 10 A Physically Simulated Dynamic Interactive Object System 101 10.1 Improving Realism in the Interaction Platform . . . . . . . . . 102 10.2 Extending Object and World Descriptions . . . . . . . . . . . . 103 10.3 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 11 Conclusions 109 IV ENABLING DYNAMIC 3D AVATAR CONTROL 111 12 Introduction 115 13 Related Work 119 14 An Avatar Control Method for Direct Interaction 125 14.1 A Dynamic Physical Avatar Object . . . . . . . . . . . . . . . . 125 14.2 A Direct Avatar Controller Exploiting IK . . . . . . . . . . . . 127 14.3 Distributing Animation Information in NVE Systems . . . . . . 129 14.4 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131 15 A Physical Travel Method Enabling Haptic Force Feedback 135 15.1 Creating A Haptic Controller by Employing Rigid Body Dynamics135 15.1.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . 135
Page 1: DOCTORAATSPROEFSCHRIFT 2008 | Schoo
Page 5 and 6: Acknowledgments A researcher’s wo
Page 7 and 8: Abstract The field of networked vir
Page 9: Contents Acknowledgments i Abstract
Page 13 and 14: AI Artificial Intelligent AOI Area
Page 15 and 16: List of Figures 1.1 The different s
Page 17 and 18: LIST OF FIGURES xiii 10.1 Illustrat
Page 19 and 20: General Introduction The idea of cr
Page 21 and 22: Problem Statement One way of explai
Page 23 and 24: Contributions The overall purpose o
Page 25 and 26: Although the field we are working i
Page 27 and 28: This dissertation comprises five pa
Page 29: Part I BACKGROUND
Page 32 and 33: 14 TABLE OF CONTENTS
Page 34 and 35: 16 Defining Interactive Virtual Rea
Page 46 and 47: 28 A Brief Historical Overview Figu
Page 48 and 49: 30 A Brief Historical Overview comm
Page 50 and 51: 32 A Brief Historical Overview Figu
Page 52 and 53: 34 A Brief Historical Overview 2.2
Page 54 and 55: 36 A Brief Historical Overview (a)
Page 57 and 58: Table of Contents 3 Introduction 41
Page 59 and 60: CHAPTER3 Introduction In the genera
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Another interesting point, in the c
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CHAPTER4 Related Work While modelin
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proach, interactive surfaces descri
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CHAPTER5 A Dynamic Interactive Obje
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5.2 Interactive Objects and Dynamic
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5.3 The Interaction Layer 57 Listin
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5.3 The Interaction Layer 59 Task 3
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5.3 The Interaction Layer 61 Figure
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5.4 Network Distribution and Simula
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5.5 Evaluation of the Interactive O
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CHAPTER6 Conclusions In this part,
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Part III CREATING MORE REALISTIC DY
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76 TABLE OF CONTENTS
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78 Introduction to recent advances
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80 Introduction
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82 Related Work Figure 8.1: A model
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84 Related Work Figure 8.3: Illustr
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86 Related Work Figure 8.4: Ragdoll
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88 Related Work
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90 The ExtReAM Library: Extensible
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102 A Physically Simulated Dynamic
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110 Conclusions application develop
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Table of Contents 12 Introduction 1
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CHAPTER12 Introduction In the first
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117 effector of the IK chain of an
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CHAPTER13 Related Work In order to
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121 the rendering of rather static
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123 temperature and galvanic skin r
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CHAPTER14 An Avatar Control Method
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14.2 A Direct Avatar Controller Exp
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14.3 Distributing Animation Informa
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14.4 Results 131 frame, resulting i
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14.4 Results 133 Figure 14.3: Resul
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CHAPTER15 A Physical Travel Method
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15.1 Creating A Haptic Controller b
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15.2 Enabling Physical Travel 139 W
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15.2 Enabling Physical Travel 141 t
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15.2 Enabling Physical Travel 143 r
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CHAPTER16 Evaluating the Effects of
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16.1 The Haptic Travel Experiment 1
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16.1 The Haptic Travel Experiment 1
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16.2 Experimental Results 151 (a) (
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16.2 Experimental Results 153 pare
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16.2 Experimental Results 155 Figur
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CHAPTER17 Conclusions In contrast t
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Part V CONCLUSIONS AND FUTURE RESEA
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162 General Conclusions concepts of
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164 Directions for Further Research
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APPENDIXA Publications [Quax 03] P.
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APPENDIXB Dutch Summary - Samenvatt
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APPENDIXC C.1 Interactive Door Obje
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C.1 Interactive Door Object 173 <
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C.2 Physical Interactive Door Objec
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REFERENCES [3ds Max 07] Autodesk 3d
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179 Almitos, 1995. [Cal3D 07] Cal3D
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181 [Granny3D 07] Granny3D. http: /
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183 [Magnusson 02] C. Magnusson, K.
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185 Interaction, vol. 7, no. 4, pag
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187 Constraints for Articulated Fig
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DOCTORAATSPROEFSCHRIFT - EDM - UHasselt

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