introduction to 3d interaction
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POSTECH VR
Introduction to 3D Interaction
포항공과대학교 컴퓨터 공학과
가상현실감 연구실
2POSTECH VR Introduction
POSTECH VR Laboratory
• Members– Prof. Chan Mo Park and Asst. Prof. Gerard Jounghyun Kim– Research Staff(3), Ph.D. Student(3), Master’s Student(10)
• Research– 3D interaction
• interactive music system• multimodal interaction for CAD• VR based motion training
– software engineering of virtual worlds– human body modeling
• http://www.postech.ac.kr/cse/vr
3POSTECH VR Introduction
발표 순서
• Introduction(90 min.)– 3D interaction tasks(definition)– issues on 3D interaction design– taxonomy of 3D interaction
• Task oriented interaction design at POSTECH(50 min.)– interaction techniques for immersive CAD : menu selection– interactive music system : manipulation/view– VR based motion training(Ghost Metaphor) : following/view
• Evaluation for 3D interaction tasks(30 min.) – usability engineering method – evaluation techniques
• Conclusion and Discussion(10 min.)
4POSTECH VR Introduction
Why 3D Interaction?
• 3D/VE application – immersion(presence)– naturalness(cognitive load)– fast/efficient
• Application up-to-date– example
• architectural walkthrough, visualization, training etc.– complex interaction– usability– problem
• introduce 2D interaction technique : DOF problem• advanced technology : not ensure that VE’s are usable
5POSTECH VR Introduction
Definitions
• Interface technology– specialized choice of the hardware/software through which a
user communicates with a computer system
• Interaction model– a model by which the user accomplishes some tasks via the
interface
H/WS/W
HMD, Tracker, Glove...
Performer,Inventor,WTK, ...
Syste
m
Tasksselect, observe,manipulate, ...
Interaction Model
data format, stage, view,hierarchy, structure, ...
6POSTECH VR Introduction
Interaction Tasks
• Navigation– movement(travel, walk) and planning(way-finding)
• Selection– choosing one or more objects
• Manipulation– specification of object position, orientation, scale, shape,
others
• Selection Manipulation ?– selection may be a stand-alone task – ex) menu selection(command)
• Others : almost atomic(chunked) tasks– visual information browsing– measurement– data input– following, flow control
7POSTECH VR Introduction
Goals of Interaction Design
• Performance– efficiency, accuracy and productivity– quantitative measures : how well is task being done?
• Usability– easy to use and learn– qualitative experience : how easy is it to communicate with?
• Applicability– take not hindered by the interface– qualitative measures : how well applicable is it to other
applications?
8POSTECH VR Introduction
Directions of Research
• Generic interaction technique– do not consider particular applications – infer from real 3D interaction methods/develop new
techniques
• Application dependent interaction technique– suitable interaction methods for a given application– start from GIT and consider new techniques
• Conflict– from GIT to ADIT and from ADIT to ADIT– need methodology for developing/verifying GIT/ADIT in a
scientific way
• Goal– guideline for 3D interaction design– GIT : initial guideline for 3D interaction design– ADIT : case by case UI study design of process
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