3D User Interaction CS-525U: Robert W. Lindeman. Intro to 3D UI. Department of Computer Science. Worcester Polytechnic Institute.

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1 CS-525U: 3D User Interaction Intro to 3D UI Robert W. Lindeman Worcester Polytechnic Institute Department of Computer Science

2 Why Study 3D UI? Relevant to real-world tasks Can use familiarity to ease adaptation Can increase realism of experience Mature technology Cheap, robust solutions Need to create interface mappings 3D interaction is difficult Many VR/gaming systems lack necessary cues Adapting WIMP techniques is not adequate R.W. Lindeman - WPI Dept. of Computer Science 2

3 Why Study 3D UI? (cont.) Current approaches are either too simple or unusable Since users have problems, dumb it down! Need to be able to perform all actions though! Ripe area for study Very hot area of HCI We know a lot about doing things in 2D And also about doing things in the real world R.W. Lindeman - WPI Dept. of Computer Science 3

4 Sample Applications Design and prototyping Assembly Ergonomics (test virtual prototype) Psychiatric treatment Phobias Post-traunatic stress disorders Scientific visualization Explore 3D data sets Collaborative work Tools, gestures, madia control R.W. Lindeman - WPI Dept. of Computer Science 4

5 A Brief History Before 1980 Mostly keyboard input Display for text After first Graphical User Interfaces (GUIs) Added complexity Growth in HCI studies R.W. Lindeman - WPI Dept. of Computer Science 5

6 A Brief History (cont.) HCI draws on Perception Cognition Linguistics Human factors Ethnography Graphics design Computer science R.W. Lindeman - WPI Dept. of Computer Science 6

7 A Brief History (cont.) Technology developments also drove growth Flight simulators 3D Graphics Augmented Reality (AR) Virtual Reality (VR) Flight R.W. Lindeman - WPI Dept. of Computer Science 7

8 Birth of Virtual Reality The Ultimate Display paper by Ivan Sutherland (1965) Sutherland s HMD (1968) Jaron Lanier VPL DataGlove (1985) Jim Foley's Scientific American paper (1987) R.W. Lindeman - WPI Dept. of Computer Science 8

9 Basic Interaction Tasks in VR (Bowman et al.) Object Selection What do I want to manipulate? Object Manipulation How can I manipulate it? Navigation Wayfinding: How do I know where I am, and how to get where I am going? Travel: How do I get there? (locomotion) System Control How do I change system parameters? Symbolic Input Inputting text and numbers R.W. Lindeman - WPI Dept. of Computer Science 9

10 Oh, I forgot One (Lindeman) Killing R.W. Lindeman - WPI Dept. of Computer Science 10

11 Dealing with Objects Problems Ambiguity Distance Selection Approaches Direct / enhanced grabbing Ray-casting techniques Image-plane techniques Manipulation Approaches Direct position / orientation control Worlds in miniature Skewers Surrogates Courtesy: D. Bowman R.W. Lindeman - WPI Dept. of Computer Science 11

12 Navigation: Wayfinding People get lost/disoriented easily Traditional tools Maps (North-up vs. Forward-up) Landmarks Spoken directions Non-traditional Callouts Zooming Images: R.W. Lindeman - WPI Dept. of Computer Science 12

13 Navigation: Travel Problems Limited physical space, unlimited virtual space Cables Approaches Fly where you point/look Treadmills Walking in place Big track ball CLIP Image: R.W. Lindeman - WPI Dept. of Computer Science 13

14 System Control Need to manipulate widgets Lighting effects Object representation Data filtering Approaches Floating windows Hand-held windows Gestures Menus on fingers R.W. Lindeman - WPI Dept. of Computer Science 14

15 System Control Examples Courtesy: R. Lindeman Courtesy: D. Bowman R.W. Lindeman - WPI Dept. of Computer Science 15

16 User, Task & Environment The "optimal" interface will depend on the capabilities of the user, the nature of the task being performed, and the constraints of the environment. User Dexterity, level of expertise Task Granularity and complexity of task Environment Stationary, moving, noisy, etc. R.W. Lindeman - WPI Dept. of Computer Science 16

17 Direct Manipulation R.W. Lindeman - WPI Dept. of Computer Science Courtesy: Virginia Tech 17

18 Can We Do WIMP in VR? Courtesy: Virginia Tech R.W. Lindeman - WPI Dept. of Computer Science 18

19 Desktop Interaction: SensAble PHANToM R.W. Lindeman - WPI Dept. of Computer Science 19

20 Wearable Interaction with Haptics: Immersion CyberGrasp R.W. Lindeman - WPI Dept. of Computer Science 20

21 Wearable Interaction: Rob's Hand-Held Windows R.W. Lindeman - WPI Dept. of Computer Science 21

22 How Do We Do Menus? Courtesy: Virginia Tech R.W. Lindeman - WPI Dept. of Computer Science 22

23 Interface Devices Courtesy: Virginia Tech R.W. Lindeman - WPI Dept. of Computer Science 23

24 Augmented Reality (AR) Courtesy: Virginia Tech R.W. Lindeman - WPI Dept. of Computer Science 24

25 Applications Data perceptualization Map variables to tactors Spatial awareness Driver warning system (vibrotactile Bott's dots) Navigational aid Firefighter guidance Non-verbal communication Map hand signals to vibrotactile patterns R.W. Lindeman - WPI Dept. of Computer Science 25

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