美国国家设计资源库

这是最权威的数据库，用于做CAD建模 #VRML V2.0 utf8 WorldInfo { info [ "This file was created by the GICL Sat2Vrml program", "http://gicl.mcs.drexel.edu/", "Drexel University", "Released under the GNU GPL", "Copyright (C) 2001 Daniel Lapadat" ] title "GICL Sat2Vrml" } Viewpoint { fieldOfView 0.785398 position 50 50 300 orientation 0 0 1 0 description "Front" jump TRUE } Viewpoint { fieldOfView 0.785398 position 50 50 -200 orientation 1 0 0 3.141593 description "Back" jump TRUE }