Working with mobile 3d graphics, 1 jsr 184 overview, 2 immediate mode – Sun Microsystems J2ME User Manual
Page 79: Jsr 184 overview, Immediate mode, Chapter 9
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CHAPTER
9
Working With Mobile 3D Graphics
This chapter provides a brief overview of working with 3D graphics content.
9.1
JSR 184 Overview
JSR 184 is a specification that defines the Mobile 3D Graphics (M3G) API for J2ME.
This API provides 3D functionality in a compact package that’s appropriate for
CLDC/MIDP devices. The API provides two methods for displaying 3D graphics
content. The immediate mode API makes it possible for applications to directly create
and manipulate 3D elements. Layered on top of this is a scene graph API, also called
retained mode, that makes it possible to load and display entire 3D scenes that have
been designed ahead of time. Applications are free to use whichever approach is
most appropriate or to use a combination of the retained mode and immediate
mode APIs. The JSR 184 specification also defines a file format (
.m3g
) for scene
graphs.
For more information, consult the JSR 184 specification:
JSR 184 provides a standard API for CLDC/MIDP devices, enabling a new
generation of 3D applications. The immediate mode API, in turn, is compatible
with OpenGL ES, a standard lightweight API for 3D graphics. See
for more information on OpenGL ES.
9.2
Immediate Mode
Immediate mode is appropriate for applications that generate 3D graphics content
algorithmically, like scientific visualizations or statistical graphs. The application
creates 3D objects and manipulates them directly.