Flexibility in Virtual Environments...

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14 Νοε 2013 (πριν από 3 χρόνια και 7 μήνες)

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Flexibility in Virtual
Environments



A Fully Adjustable Virtual
Classroom

Zoltán Geiszt, geiszt@vision.vein.hu

Cecília Sik
-
Lányi, lanyi@almos.vein.hu


Péter Károlyi, chartless@freemail.hu



Virtual Environments & Imaging Technologies Laboratory,

University of Pannonia, HUNGARY

Contents


Introduction


Flexibility in Virtual Environments


Adjustable Virtual Classroom


Program
-
structure


Use


Test


Summary


Introduction


Innate human fears (also termed phobias):


Darkness


Insects


Great Depths


Social phobias: stage
-
fright



Virtual Reality is a fascinating tool


Environments can be displayed in 3D


Situations imitating reality can be set up


User can immerse these environments


Level of realism can be set


Avoid unpleasant effects


Stresses important and positive elements




Virtual Environment (VE) without
Flexibility


Bounded surroundings:


Geometry


Textures


Sounds


Bounded dinamism


Preprogrammed events


Leads to
Generalisation


Follows statistic
-
based standards


Matches the needs of majority




or


Matches the needs of a non
-
existent
„standard
human”







Virtual Environment (VE) with
Flexibility


Un
bounded surroundings:


Able to depict even the user’s very own
environment from real life


Un
bounded dinamism


Supervisor (therapist) can coordinate interactions
within the VE


Refinement to individual needs


More smooth and pleasant for the user


Targets the actual problem


Allows dynamic follow
-
up for new findings &
achievements







The Adjustbale Virtual Class



The following problems frequently appear among
children


anxiety


fear of being unable to answer


do not dare to speak at all



Our aim


Help to solve these problems



Classroom VE


Tasksolving setting


Follows the principles of Flexibility


custom classrooms


Avatar interactions


A supervisor controls the VE in real
-
time




Develoment:


Models: Maya 6.5 & Poser 6.0


Engine: Visual C++ 6.0 & DirectX 9.0 API


Structure
-

Twofold software package:


Editor: sets up classroom community


Viewer: displays the environment



Menus:


People


Class


Exercises


Room


Options:


Usual visual options


Language of Editor


Menus of the Editor


Room menu


Imports
custom files:


.JPG


.XML


Textbox


Preview

Menus of the Editor


People menu:


Imports
custom files:


.JPG


.WAW


Preview

Menus of the Editor


Class menu:


Imports
custom files:


.JPG


.WAW


.XML


Preview

Menus of the Editor


Exercises
menu


Imports
custom files:


.JPG


.WAW


Textbox


Preview

Menus of the Editor


User immerses with a head mounted display (or
monitor)


Solves tasks


Trainee supervises (from the background)


Controls the appearing tasks


Hotkeys for


Changing between tasks (left/right cursors)


Showing/Hiding the current task (+/
-
)


Controls the virtual avatars


feedback for the user


Hotkeys for


Selecting avatars (F1
-
F10, F12)


Assigning actions (1
-
5)






Using the AVC

Test of the Adjustable Virtual
Classroom


Flóra Kozmutza Ground School Skill
-
Developing Special School and College in
Veszprém, Hungary


Subject group: 64 children mostly with
average level disability and a few with severe
level


Pretesting:


The children easily get used to the HMD


HMD helped fixing their gaze


New suggestions:


Temporary fixing of line of sight




Usability and Pedagogical test:


Development of attention


HMD supported fixation of gaze


better concentration


Task
-
interpretation


Appropriate representation of tasks


Suggestion: giving the tasks in speech


Task
-
solving


The children were very active and cooperative


Suggestion: using mouse cursor for answering


Feedback


The children were really motivated by the virtual teacher


Suggestion: more direct feedback from the virtual teacher


Suggestion: possibility for retaking failed exercises


Test of the Adjustable Virtual
Classroom

Summary


The twofold pattern of the program provides a good
basis for high
-
level flexibility


Displaying the users’ very own environment enhances
presence (support tests are underway)


The program observably helps children with fear of
public speaking


The program is in use in various primary schools in
Veszprém, Hungary


Thank you for your kind
attention!