Denna rapport behandlar utvecklingen av den spelmotor samt spellogik som används i spelet Steam Tale utvecklat under projektnamnet Project Steam Age av gruppen StormBound. Spelet utvecklades i första hand för mobila enheter, och i rapporten ingår även en kort undersökning av mobila spel i ett historiskt perspektiv. Även spelets genre, JRPG, en förkortning av Japanese Role Playing Game, kommer att förklaras som hastigast med referenser till andra spel inom genren. Spelet programmerades för Android OS version 2.3 och framåt i språket Java. En av svårigheterna som påträffades, såsom beskrivs i rapporten, var att säkerställa att spelet fungerar för den varierande prestanda som mobila enheter utgör, inklusive aspekter såsom med eller utan hårdvaruacceleration av grafik, varierande mängd lagringsutrymme och processorkärnor samt storlek på skärmar. Därtill bör man vid skapandet av en applikation av denna typ beakta resurshantering, framförallt beträffande grafik och ljud, ett ämne som behandlas i denna rapport. / This report concerns the development of the game engine and game logic that are used within the game Steam Tale, which during the development process was known as Project Steam Age, by the group StormBound. The game was developed targeting mobile devices, and within this report is included a short perspective on the history of mobile gaming. The game’s genre, JRPG, short for Japanese Role Playing Game, and peripheral concepts in regards to it are explained as well, and in relation to other genres and games available. The game was made for Android v2.3 and later and as such coded in Java. Amongst the difficulties encountered, as detailed within this report, were the task of ensuring that the game runs on a wide range of phone hardware, including aspects such as both with and without hardware-based graphical acceleration, varying amounts of storage space and CPU-cores, as well as differing screen sizes. Furthermore, at the creation of applications such as this one should consider resource handling, especially concerning graphics and sounds, a topic discussed in this report.

This report concerns the development of the game engine and game logic that are used within the game Steam Tale, which during the development process was known as Project Steam Age, by the group StormBound. The game was developed targeting mobile devices, and within this report is included a short perspective on the history of mobile gaming. The game’s genre, JRPG, short for Japanese Role Playing Game, and peripheral concepts in regards to it are explained as well, and in relation to other genres and games available.   The game was made for Android v2.3 and later and as such coded in Java. Amongst the difficulties encountered, as detailed within this report, were the task of ensuring that the game runs on a wide range of phone hardware, including aspects such as both with and without hardware-based graphical acceleration, varying amounts of storage space and CPU-cores, as well as differing screen sizes. Furthermore, at the creation of applications such as this one should consider resource handling, especially concerning graphics and sounds, a topic discussed in this report. / Denna rapport behandlar utvecklingen av den spelmotor samt spellogik som används i spelet Steam Tale utvecklat under projektnamnet Project Steam Age av gruppen StormBound. Spelet utvecklades i första hand för mobila enheter, och i rapporten ingår även en kort undersökning av mobila spel i ett historiskt perspektiv. Även spelets genre, JRPG, en förkortning av Japanese Role Playing Game, kommer att förklaras som hastigast med referenser till andra spel inom genren.   Spelet programmerades för Android OS version 2.3 och framåt i språket Java. En av svårigheterna som påträffades, såsom beskrivs i rapporten, var att säkerställa att spelet fungerar för den varierande prestanda som mobila enheter utgör, inklusive aspekter såsom med eller utan hårdvaruacceleration av grafik, varierande mängd lagringsutrymme och processorkärnor samt storlek på skärmar. Därtill bör man vid skapandet av en applikation av denna typ beakta resurshantering, framförallt beträffande grafik och ljud, ett ämne som behandlas i denna rapport.

This master's thesis deals with the possibilities of using open source 3D game engine Java Monkey Engine (jME) in developing applications for the Android platform. It includes theoretical knowledge for the jMonkey Engine architecture and the Android platform. In the following section, the thesis describes used techniques and external libraries in solving issues of interaction between jME and Android platform and of working with objects in the 3D scene and their way of implementation.