User Manual
Contents
1. shift keys for the second player In future versions selection and deselection with the brick will be available 3 3 Translation First select the tetromino Then move the brick to the desired location and the tetromino will follow your movements Note that the tetromino will not move UP 3 4 Rotation First select the tetromino Then rotate the brick in the desired direction to rotate the tetromino Depending on the rotation speed ratio used in section 3 1 the tetromino will rotate correspondingly as can be seen below DAA Brick 90 E Tetromino 3 5 Practice Mode To practice the above click on the Practice button Follow the instructions through a series of practice tasks 3 6 Starting Pausing a Game Click on the Start button Three tetrominoes will start falling and you may use the brick to play You may pause the game at any time by clicking on the Pause button 3 7 Exit To exit the game press the Exit button2. image of the laptop monitor For more precise calibration of the size of the bricks and of the position of the screen within the camera frame select Start Calibration from the menu with a mouse click Then move the center of brick into the each corner of mulTetris board on the screen As calibration progresses you will see a virtual brick cursor that will start to follow more and more precisely your real brick and will reflect better and better the real size of the brick When satisfied with the results press Stop Calibration 6 Torun the application run the run sh shell script and launch mulTetris from the Toys menu Note that the image needs to be flipped from the menu select Camera Flip Image 3 Gameplay 3 1 Calibration If it has not been done already press Start Calibration and follow the instructions in step 5 of section 2 before attempting to play the game Then you can change the ratio of the angle of rotation of the tetromino to that of the brick by entering an integer between 1 and 4 in the Rotation Speed field For example a value of 1 represents a direct mapping while the default ratio of 4 maps a 90 degree tetromino rotation to a 22 5 degree brick rotation This is analogous to a car s transmission where higher ratios correspond to higher speeds 3 2 Selecting Deselecting a Tetromino In the beta system only selection is done with the keyboard space bar for the first player and either
3. mulTetris Beta System User Manual April 3 2006 NOTE This user manual is accessible through the Help button inside the game 1 The Brick In mulTetris the bright translucent object referred to as a brick is the only interface to the game It can be used to push buttons and play the game Note that in the current beta system the brick can only be used to control the tetrominoes and cannot be used for other interactions with the application 1 e pressing application buttons etc Thus a conventional mouse is still needed Note Do not cover the brick completely with your hand If this happens the colour recognition software will not be able to properly detect its colours and you will not be able to control the tetromino The brick should be held from one corner as shown below 2 Installation 2 1 Installation Instructions Download the package and untar it 2 2 Hardware Setup 1 Lay the laptop screen flat on the table 2 Setup the camera such that it is elevated and pointing downwards onto the flat screen The setup should look like 3 The bricks should be moved on the laptop screen as well as used to interact with the tetrominoes thus allowing for a one input one output mechanism 4 Setup a software environment suitable for CV4HCI and change the settings of the camera and of the trackers as per described in CV4HCI s documentation 5 The camera also needs to be adjusted with regards to the
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