Viewing and Editing Project Properties
Running Projects in the Emulator
Searching the WURFL Device Database
Finding Files in the Multiple User Environment
CLDC Emulation on a Windows Mobile Device
Installing CLDC Emulation on a Windows Mobile Emulator (Windows Only)
JSR 82: Bluetooth and OBEX Support
JSR 135: Mobile Media API Support
JSR 177: Smart Card Security (SATSA)
Content for Mobile 3D Graphics
JSR 205: Wireless Messaging API (WMA) Support
JSR 211: Content Handler API (CHAPI)
JSR 226: Scalable 2D Vector Graphics
JSR 238: Mobile Internationalization API (MIA)
JSR 256: Mobile Sensor API Support
One of the challenges of MIDP development is the constrained environment of typical devices. Compared to desktop computers, MIDP devices have slow processors and little memory. These challenges extend into the arena of 3D graphics. To accommodate a wide variety of implementations, the JSR 184 specification provides various mechanisms to make the display of a 3D scene as efficient as possible.
One approach is scoping, a technique where you tell the 3D graphics implementation when objects are not going to interact with each other. For example, if you defined a scene graph for a house, you could use scoping to specify that the light in the basement doesn’t affect the appearance of the bedroom on the second floor. Scoping simplifies the implementation’s task because it reduces the number of calculations required to show a scene.
In general, the best way to improve the rendering speed of 3D scenes is to make some compromises in quality. The Mobile 3D Graphics API includes rendering hints so that applications can suggest how the implementation can compromise quality to improve rendering speed.