Sik-Lányi Cecília

Tilinger Ádám

Umenhoffer Tamás

University of Szeged

Designing and Creating a 3D Display SoftwareTamás Umenhoffer, Ádám Tilinger and Cecília Sik LányiAt the Department of Image Processing and Neurocomputing at the University of Veszprémthere are several researches, in which we examine the user’s behavior in virtual worlds. Theseresearches can help to understand various occurrences (for example: different kind of phobias:claustrophobia, agoraphobia etc.; left handedness, examining reaction time under different cir-cumstances etc.). Up to now for each research we had to write a suitable display software, wedidn’t have such a program, which can display almost any kind of virtual world, can treat theinteraction between the user and the virtual world and can record the user’s actions for furtherexamination.Creating such a program brings on to a lot of problem and question. One of the basic ques-tions is how to build our virtual world. The most comfortable way is to create the world in awell known and efficient three dimensional modeling software, and export it in a format thatcan be read by the display software. So we build our virtual worlds in professional model-ing software called Maya. The exported data is not directly read by the display software, it isprocessed by an editor program wrote by us. This program is needed because of the better op-timalization, as those objects in our worlds which are responsible for the interactivity (such asbuttons, timers, movable, rotatable objects) have no corresponding in Maya. So the propertiesof these objects will be set in this editor. We also set the material and light source propertieshere. This is because the display software uses OpenGL instructions for drawing, and this isthe most exact way to suit these properties to the OpenGL’s shading technique.One of the most basic interactions between the user and the environment, and the objects ofthe virtual world is the detecting of collisions and the physically realistic treating of collisionresponses. To solve this problem we use the technique of space partitioning. The binary treestructures needed for this technique are also created in our editor program as they have to buildonly once during the display.One of the most important tasks of the display software is the recording of the user’s actions.We can set the data to be stored, which depend on the examined phonemes. These can be: theuser’s movement, the path of walk, the exact time of reaching a control point, the time taken tonotice an object, reaction time etc.On the conference we would like to speak about the details of described problems and theirsolutions and our future plans. If facilities are provided we’ll show our programs in action.122

Designing and creating a 3D display software : [abstract]

http://acta.bibl.u-szeged.hu/59816/1/cscs_2004_122.pdf

Designing and creating a 3D display software

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