使用JAVA3D实现三维图形—雪山和海面。带有sea level 的整个地形和非常粗糙的表面，可以看到雪山顶和平坦的海面。没有使用sea level ，则有比较平滑的表面。-Three-dimensional graphics using JAVA3D- Snow and sea. With sea level of the terrain and very rough surfaces, you can see snow-capped mountains and the flat top s