1. Virtual Reality Exhibition Hall
Hypercube
Chenxi Shi
Li Ma
Shuyu Zhang
Ziren Wang
Oulei Zhou
Guided By Prof. CHAIYAPORN MUTSALKLISANA
2. 1
Contents
Introduction......................................................... 3
Problem Description.................................................. 4
Intended Customers & Benefits........................................ 5
EER Diagram.......................................................... 6
Normalization........................................................ 7
Views................................................................ 8
1) View Artist ..................................................... 8
2) View Artwork .................................................... 8
3) View Level 1 Artwork ............................................ 9
4) View Level 2 Artwork ............................................ 9
5) View User Comments ............................................. 10
6) View User Link ................................................. 10
7) View User Payment .............................................. 11
8) View User Profile .............................................. 11
Procedures.......................................................... 12
Procedure 1 for Different Artist .................................. 12
Procedure 2 for Different Artwork ................................. 12
Procedure 3 for Different User Collection ......................... 12
Procedure 4 for Different Artist .................................. 13
Procedure 5 for Different User Level .............................. 13
Procedure 6 for Recent Comment .................................... 14
Procedure 7 for Different Style Artwork ........................... 14
Procedure 8 for Different MediumTech Artwork ...................... 15
Triggers............................................................ 16
Trigger in Payment with User-Level ................................ 16
Trigger in Comment with User-Activist ............................. 17
Triggered after update a comment record ........................... 17
Index............................................................... 18
3. 2
Transaction......................................................... 20
Unity 3D Program.................................................... 24
Introduce ......................................................... 24
Program Parts Detail .............................................. 25
Future Scope and Conclusion......................................... 29
Display ........................................................... 29
Sound ............................................................. 29
Voice ............................................................. 29
4. 3
Introduction
Virtual reality technology is a way to create and experience
the virtual world of computer simulation system, which uses
a computer-generated simulation system. In addition to
general computer having visual perception, there are
auditory perception, tactile perception, motion perception,
even including the taste, smell, perception and so on. Ideal
virtual reality should have all the people with the sensing
function.
In this project, database tables including exhibits, themes,
activities, visitors and so on can be established. Then it
can create a VR system that shows a kind of exhibition hall
interactive 3D dynamic visual and even the physical
behavior, which enable users to immerse a real exhibition
environment.
5. 4
Problem Description
With the development of modern technology, the virtual
reality technology is no more a fantasy. Industrial giants
like Google, Sony and Razer have already delivered promising
VR demo system. In addition to general computer having
visual perception, there are auditory perception, tactile
perception, motion perception, even including the taste,
smell, perception and so on. Ideal virtual reality should
have all the people with the sensing function. The V-R
equipment is usually a goggle or a helmet, and can transport
people’s mind to any virtual environment.
A V-R system always needs an enormous database system to
organize detailed VR elements. For our project, we use
background knowledge of Virtual Reality, setup a database
for a VR exhibition hall. In order to realize such database,
we will need to define structure of users’ information,
exhibition hall maps, exhibit models, activities’
information and sensorial feedback. The exhibits are assumed
to be scanned by a high resolution 3D scanner and the
database can provide ports for these model information
inputs.
6. 5
Intended Customers & Benefits
The customers for this database are visitors who are
interested in artworks. This document should show people 3D
pictures of almost all famous artworks even provide tactile
feeling. This database still includes some functional
specification of application, which can help customers
understand easily.
This database can host different themes of activity,
determine various architecture styles of the virtual hall.
Users can interact with the exhibits and other users in the
virtual community. All the exhibits can be scanned and
stored in the database system so that people can see and
touch in a virtual world and the tactile sensor would
response the actual feeling to the users.
8. 7
Normalization
Database normalization is the process of organizing the
columns and tables of a relational database to minimize data
redundancy. The Purposes for Normalization are eliminating
redundant data and Ensuring data dependencies make sense.
1NF refers to each table should be organized into rows, and
each row should have a primary key that distinguishes it as
unique. 2NF means that for a table that has concatenated
primary key, each column in the table that is not part of
the primary key must depend upon the entire concatenated key
for its existence. 3F applies that every non-prime attribute
of table must be dependent on primary key.
9. 8
Views
1) View Artist
Displays all artist information.
It is ordered by artist name.
It joins artist table with other 2 tables.
SELECT * FROM VR.`artist view`;
2) View Artwork
Displays all artwork information.
It is ordered by artwork name.
It joins artwork table with other 4 tables.
SELECT * FROM VR.`artwork view`;
10. 9
3) View Level 1 Artwork
Displays the artwork that is level 1.
It is ordered by artwork name.
It joins attributes from two tables.
SELECT * FROM VR.`level 1 artwork`;
4) View Level 2 Artwork
Displays the artwork that is level 2.
It is ordered by artwork name.
It joins attributes from two tables.
SELECT * FROM VR.`level 2 artwork`;
11. 10
5) View User Comments
Displays the buyer and details about the products they have
bought.
It is ordered by comment ID.
It joins attributes from two tables.
SELECT * FROM VR.`user comment`;
6) View User Link
Displays the link information between users.
It is ordered by first user ID.
SELECT * FROM VR.`user link`;
12. 11
7) View User Payment
Displays the payment information of users.
It is ordered by transaction ID.
It joins attributes from two tables.
SELECT * FROM VR.`user payment`;
8) View User Profile
Displays the user profile information.
It is ordered by user ID.
It joins attributes from two tables.
SELECT * FROM VR.`user profile`;
13. 12
Procedures
Procedure 1 for Different Artist
Procedure 2 for Different Artwork
Procedure 3 for Different User Collection
14. 13
Procedure 4 for Different Artist
Procedure 5 for Different User Level
15. 14
Procedure 6 for Recent Comment
Procedure 7 for Different Style Artwork
17. 16
Triggers
A trigger is a procedure that initiates an action when upon
an event. Those event may be an insert, delete, and update.
There are two types of triggers, which are before and after
triggers. The DBMS automatically fires the trigger as a
result of a data entry or modification to the table in
concern. Triggers are used to maintain the referential
integrity of data by changing the data in an orderly manner.
Trigger in Payment with User-Level
Triggered after insert a payment record
When insert a payment record in the table payment
➨ update the U_level=2
➨make the user could see more number of artworks
triggered after delete a payment record
when delete a payment record in the table payment (which
means the cancel a payment)
➨ update the U_level=1
➨make the user could see less number of artworks than
before
18. 17
Trigger in Comment with User-Activist
Triggered after insert a comment record
When insert a comment record in the table comment
➨ update the U_Activist= U_Activist+1
➨make the user could use this activist points to do some
activists in the VR
Triggered after update a comment record
When update a comment record in the table comment
➨ update the U_Activist= U_Activist+1
➨make the user could use this activist points to do some
activists in the VR
19. 18
Index
The database index is a data structure that improves the
speed of data retrieval operations on a table. Four index
included in this table of Artwork, User, Art owner, Payment
can search information quicker.
Create Index on Art owner table, we can get information
about Art owner much quicker.
Create Index on Payment table, we can get information about
payment much quicker
20. 19
Create Index on User table, we can get information about
user much quicker
21. 20
Transaction
We use transaction syntax every time we insert data into the
table.
Here is an example when we add data into the MediumTech
table.
START TRANSACTION;
USE `VR`;
INSERT INTO `VR`.`MediumTech` (`Tech_Code`, `Name_Tech`,
`Description_Tech`) VALUES ('OC', 'Oil on canvas',
'Description_Tech');
INSERT INTO `VR`.`MediumTech` (`Tech_Code`, `Name_Tech`,
`Description_Tech`) VALUES ('OP', 'Oil on poplar', 'Oil
painting on a poplar wood panel');
INSERT INTO `VR`.`MediumTech` (`Tech_Code`, `Name_Tech`,
`Description_Tech`) VALUES ('P', 'Portrait', 'NULL');
INSERT INTO `VR`.`MediumTech` (`Tech_Code`, `Name_Tech`,
`Description_Tech`) VALUES ('F', 'Frescoes', 'NULL');
INSERT INTO `VR`.`MediumTech` (`Tech_Code`, `Name_Tech`,
`Description_Tech`) VALUES ('M', 'Marble', 'NULL');
COMMIT;
Users and Privileges
We have a variety of roles that is made up of certain
privilege that can be used to give our users different
access.
22. 21
CEO:
Own the database.
Have all privileges for the database.
CFO:
Have access to all tables.
Only select data from tables.
System Admin:
Have access to all tables, views, procedures, triggers and
anything else.
Museum Manager:
Have access to all tables that is related to the museum
itself.
Can select, insert, update and delete.
Financial Manager:
Have access to tables and views to all tables about payment.
Can select, insert and update.
Artist:
Have access to tables about their own work and information.
Can select and update.
User:
23. 22
User has 3 privileges.
Users are our museum visitors; they can select all tables
and views about our museum, artwork and artist.
Users can leave comments; they can select and insert to
table and view in comment part.
Users can make changes to their profile; they can select,
insert and update in user profile part.
Back up
Backup plan is shown below.
For every week, make full backups on Tuesday and Friday
at 11:00pm – 5: 00am (next day), the other days of the week
make incremental backups at 12:00pm – 2:00am (next day).
For every month, make full backups on 15th and 30th. If
15th (or 30th) is just Tuesday or Friday coincidentally,
then use that day’s full back up as the month full backup.
If not, make new backup for the month backup. In addition,
the weekly backup won’t not be affected by the monthly full
backup (like 30th, it still needs to make an incremental
backup for the weekly backup).
Sunday Monday Tuesday Wednesda
y
Thursd
ay
Friday Saturda
y
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IB
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FB
3
IB
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IB
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FB
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IB
25. 24
Unity 3D Program
Introduce
Because our topic is “Virtual Reality Exhibition Hall”, we
decide to apply our database on a real Virtual Reality
program, then our 3D program was born.
At the beginning, we found that Google developed a solution
to realize the theory of 3d imaging, named as CardBoard.
Then when researched the realization of Cardboard, we found
that Google supply the SDK based on Unity 3D. Everything was
all set, why don't make one. However, not everything is all
set…
First, the application of Unity 3D based on the knowledge of
Unity 3D, which is a complicated program. Second, the
development of a 3D program stands on the knowledge of 3D
design and computer game design, including scene,
gameobject, transform, quaternion, material, texture,
rendering, etc. Third, the interaction between gameobjects,
and the trigger of game event all realized in script. We
choose to use C# to realize it, for the following reasons.
1, much more programmers use C# as their Unity languages. 2,
many tutorials on the Internet all write by C#, and I need
to learn C# as a freshman. 3, many powerful features of C#
let it better at in-depth development.
Finally, we realized that real-life program all applied
their database remotely, so we installed MySQL in Linux
(Ubuntu) as a server, and input our database into the
server. Then the remote accessing is realize by setting
database user privileges. By granting user privileges at an
26. 25
IP range, our database can be accessed in by devices in
subnet.
Program Parts Detail
Using System.Data.dll and MySql.Data.dll as library
Because we set our database at the Linux, so we use the GUI
in Unity 3D to get the connection Information including
server IP address, user name, user password, database name.
27. 26
Try to use this information to make connection. If
successful, use the function ReadUserInfo() in script
LoginGUI.cs to get user information.
Then compare the input of user name and user password with
the user information in database, if match, transfer the
28. 27
user level and connection information to next scene and load
function ReadFig.cs.
ReadFig.cs execute the connection function related about
database, so that it can get the info of pictures. Then
applies many function of Unity 3D to Instantiate gameobject,
texture the gameogject clones, set the sizes, positions and
rotations these clones. Finally, update the database with
the clone’s location
30. 29
Future Scope and Conclusion
Display
Binocular stereo vision played an important role In VR
systems. Different images are generated respectively and
displayed on different monitors. When users wear special
glasses, one eye can only see the odd frame image and
another eye can only see even frame images. The difference
between odd and even frames produces a three-dimensional.
Because there are six dimension in three-dimensional space,
it is difficult to find a more intuitive approach to map the
mouse plane motion to an arbitrary three-dimensional space.
So some more complex devices to provide six dimension such
as 3Space digitizer and Space Ball are needed.
Sound
When sound runs to different ears, the time or distance are
different.
So People determine the direction of the sound source
difference by the sound phase difference. So there will be a
sense of direction. But in the VR system, the movement
direction of the sound has nothing to do with the user's
ears. In the future, more complex technology is needed to
show real sound.
Voice
31. 30
Voice input and output of voice are still important in the
VR system. That requires a virtual environment can
understand what people say and real-time interaction with
people. However it is pretty hard to make computer recognize
people language .Because there are multilateralism and
complexity in voice signal and natural language signal.
