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Detta arbete har utforskat möjligheterna att exportera en ritning gjord i programvaran CET Designer och importera den i en iPad-applikation där man kan interagera med modellen i 3D med hjälp av enhetens multi-touchgränssnitt. Exporten gjordes till formaten obj och mtl med hjälp av CET Designers egna programmeringsspråk, CM. Applikationen för iPad byggdes genom att vidareutveckla en existerade applikation för obj-import och visualisering. Applikationen använder OpenGL ES för att visualisera 3Dmodellen, och ett antal fingergester användes för att manipulera scenen. Resultatet blev en prototyp som fick ett väldigt positivt resultat i ett användbarhetstest. Det som kunde göras för att förbättra utkomsten ännu mer var att använda direkt manipulation för navigeringen för att ge en bättre användarupplevelse, samt optimera export och import för att få lägre laddningstider och kräva mindre prestanda i iPaden. This work has explored the possibilities to export a drawing made in the desktop software CET Designer and import it in an iPad application, where you can interact with the model in 3D with help of the device’s multi touch interface. The export was made to the formats obj and mtl with help of CET Designer’s own programming language, CM. The iPad application was built by further developing an existing application for obj imports and visualization. The application uses OpenGL ES to visualize the 3D model, and a set of finger gestures were used to manipulate the scene. The result of this was a prototype that had a very positive result in a usability test. To further improve the outcome, the application could be enhanced with direct manipulation to improve the user experience, and the export and import could be optimized to give lower loading times and less resource usage in the iPad

Today multi-touch technology is the basis for many new techniques designed to improveinteractions with computers and mobile devices. It seems that multi-touch screen interfacemakes the user handling very natural in the sense that there is no need for a manual in how tointeract with the object on the screen.The aim with this paper is to establish a fundamental set of design principles intendedspecifically for large multi-touch interfaces. To reach this goal we have implemented a coupleof sub-goals beforehand:It was essential that we acquired a good understanding of the current state of the multi-touchinterface and the different implementations that exist today. To make this possible weconstructed a multi-touch display, "Rosie". Knowing how the hardware is produced today willhelp us understand the limitations and also the possibilities of the design implementationstoday and in the future.We also needed to devise a sound interaction design process that conveys the moderndesigners work. During this design process four methods were implemented that gave usdeeper understanding how to reach the result in this paper (design principles). The methodsare: Qualitative conceptualisation, Qualitative user-testing, Participatory design, and Iterativeprototyping. Doing these methods we gained knowledge through the process and experienceof for example, building, running workshops, doing video-prototypes and etc. Creative designwas very relevant in our design process.The result in this paper is a foundation for a set of design principles with relevance for multitouchinterfaces and a interesting design process for developing multi-touch applications.

Validerat; 20101217 (root)