Figure 14.27 Transparency = 0.2, PolygonAttributes.CULL_NONE. Shape3D with
Figure 14.27 Transparency = 0.2, PolygonAttributes.CULL_NONE. Shape3D with transparent image applied (texture2n.gif) from AppearanceTest. 1 = MODULATE, 2 = DECAL, 3 = BLEND, 4 = REPLACE 14.6 Animated (video) texture mapping Many recent computer games use animated texture maps, for example, to map an MPEG video clip onto the face of a cube. 3D accelerator hardware is also starting to support video textures. Drawing animated textures is at present problematic in Java 3D because, although you can draw into an ImageComponentand use it as a texture image, the ImageComponentis copied into texture memory. Java 3D 1.2 should go some way to addressing this issue, but performance problems are likely to remain an issue for some time. For very simple texture animations (a few frames), each frame of the animation can be pasted (either at runtime or as a preprocess) into a composite texture image. At runtime the texture coordinates of vertices can be modified to cycle through the various frames of the animation. 14.7 Summary This chapter has given you a taste of the power of texture mapping and the important role it plays in most 3D applications, be they educational, scientific, or entertainment. Texture mapping requires a little more work from the application developer, in terms of learning new terminology and methods, but the end results justify the extra development time. Clever use of lighting and texture mapping sets the great, visually immersive 3D applications apart from flat, uninspiring computer graphics. 258
Note: If you are looking for good and high quality web space to host and run your application check Lunarwebhost JSP Web Hosting services