Introduction to 3D Interaction

1. Introduction to 3D Interaction 포항공과대학교 컴퓨터 공학과 가상현실감 연구실

2. 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 Introduction

3. 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.) Introduction

4. 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 interactiontechnique : DOF problem • advanced technology : not ensure that VE’s are usable Introduction

5. Tasks select, observe, manipulate, ... 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 System S/W H/W Performer, Inventor, WTK, ... HMD, Tracker, Glove... Interaction Model data format, stage, view, hierarchy, structure, ... Introduction

6. 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 Introduction

7. 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? Introduction

8. 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 Introduction