1. Jason Kulatunga Tyler Best CMPE 490
Twisted Tetris
Jason Kulatunga
Tyler Best
CMPE 490

2. Game Modes
Three game modes are available
Classic
Twisted
Strategic

3. History Tetris created by Alexey Pazhitnov in 1984
Packaged with the Gameboy at the handheld’s release.

4. History
Then
Now

5. Basic Gameplay All modes show at least 1 Next Tetrad
Tetrad shadows (Ghosts) are shown for each piece
10 Lines per Level
For each increase in Level, Tetrad drop speed increases

6. Basic Gameplay
Score, level and lines cleared displayed at all times in an info panel.
Score will be based upon how many lines are cleared at one time,
as well as what level you are on.

7. Basic Gameplay
No Gravity

8. Classic Mode Basic Tetris that we all know and love.
No changes from the Basic Gameplay
Only 1 Next Tetrad is shown

9. Twisted Mode Hard, Very Hard 17 New Pieces, all made up of 5 blocks
2 Next Tetrads shown
Speed varies per Tetrad randomly.

10. Strategic Mode 7 Classic Tetrads + 1 New ‘BOMB’ Piece
Move counter, when the ‘health’ bar disappears, GAME OVER, available moves affected by Level
BOMB clears 1 block radius in all directions initially, increases at higher levels.

11. Controls Classic Tetris controls using keypad Left Right Down Drop
Rotate
Pause/Resume/Menu

12. Advanced Controls
Touch capable LCD allows for block drops and block movement.
Menu Navigation can be done by touch

13. Menu System
Contextual menu, changes depending on the state of game play.
Change game modes and pause/resume, restart and quit.
Visual cues show currently selected item

14. Usability
Pieces will start out in a variety of different 8 bit colors.
Once they are locked in place will set to Red.
The ghost allows for the user to see where the piece will be placed, allowing for faster decision making.

15. LCD Touch The screen is divided into a 5x7 grid.
When the resistive touch screen is touched by the user, the USART start to receive position bytes.
Transmits 0xFF on the finger release.

16. LCD Touch
The Start position byte is read, and each following byte overwrites the End position byte until an 0xFF is received.
A column mask is used to separate the columns data from row data.

17. References
Tetrads – Pentomino - Bomb - Nintendo Gameboy - LCD Touch Panel Grid, Serial Connection - ezLCD-002 Reference Manual

18. Questions?