Talk about your Apps presentation

2. INTRODUCTION
 Name: Sailesh Dhungana
 Education: Bachelors Candidate
Princeton University, USA
 Contact: dhunganasailesh@gmail.com
9849113051

3. Prior
Programming Knowledge
 Qbasic until Grade 10
 “Introduction to Java” at Princeton
 “Short Term Course on Java(Basic)” at
Deerwalk Institute of Technology, Nepal

4. Talking About My
Application
 Name: BallZ
 Type: 2D Casual Game
(Bouncing Ball)
 Platform: Android

5. Demonstration
http://www.youtube.com/watch?v=TnI8CRkvVyU

6. Technologies Used:
 Java
 Eclipse IDE
 Android Plugin for Eclipse
 Android SDK 2.2
 Samsung phone with Android(for testing)

7. Resources Used
 Developer.android.com/resources
 “Beginning Android 4 Game Development”
(APRESS) e-book for learning as well as
framework

8. Gaming Logic
(For Android in Java)
Screen
(View Object)
Present To output
(method)
To other
Update screen
(method) objects

9. Screen Objects:
 MainMenuScreen
 GameScreen(level, life, coins, bounces)
 CongratulationsScreen
 GameoverScreen
 InstructionScreen
 LeastBounceScreen

10. InstructionScreen
Flow
LeastBounceScreen
MainMenuScreen
GameScreen(level:1,life:3,coins:0,bounces:0)
GameScreen(level:?,life:?,coins:?,bounces:?)
…
CongratulationsScreen GameOverScreen

11. Gaming Mechanics:
 Ball (Object)  Bar (Object)
 X  X
 Y  Y
 R  Width
 vX  Height
 vY
§ Move()

12. Gaming Mechanics:
 In update method of GameScreen, we allow ball to
move. In present method of GameScreen, we just
draw the ball.
 If Ball touches the bar, vY = - vY
and vX = (bar.X-ball.X)* (some factor)
 If Ball touches the borders, vX or vY changes
sign.
(The hard part is to tell when does the ball touch the
bar)

13. Gaming Mechanics:
 Otherwise, the ball moves:
 X= X+vX*deltaTime
 Y= Y+vY*deltaTime
 vY= vY+a*deltaTime
deltaTime is the time taken between two
successive GameScreen updates.

14. Gaming Mechanics:
 Also, we have Coin object for coin. We
change coin’s position in update method
and draw it in present method of
GameScreen object.
 There is also the catching of the coin.

15. Current Problems
 Graphics/UI is not great.
 Sound is awful.
 One complaint about physics but could be
because of an earlier version.
 Background pictures for later levels.

16. Advise(as much as a newb can
give)
 If you are bad at graphics, get someone else
to work with you.
 Maybe using a gaming engine is better.
 Don’t try to finish as fast as you can. There
is no race!!!