X3D stands for Extensible 3D. It is a next-generation, extensible, 3D graphics specification that extends the capabilities of VRML 97. (VRML-NG, for VRML Next Generation, was an early name for what is now X3D.) The name X3D was chosen to indicate the integration of XML
学X3D不容易呀!要掌握java,java3D,XML,VRML太恐怖了。