page2 objects in a virtual space虚拟空间

page2
objects in a virtual space虚拟空间中的对象体
Graph
1：The scene graph is the virtual space that your game happens in(场景图出现在游戏的虚拟空间中)
2：The objects in the scene graph are called "spatials"(场景图中的对象被称为“空间”，注意这里是个名词，java中一定有它的对象，并且是个基类)
3：Spatials have a translation (location), a rotation and s scale (空间在其位置上有种转换，旋转和缩放)