现在开始生成真正的3D对象，而不是象前两节课中那样3D世界中的2D对象。我们给三角形增加一个左侧面，一个右侧面，一个后侧面来生成一个金字塔（四棱锥）。给正方形增加左、右、上、下及背面生成一个立方体。

-Now start generating real 3D object, rather than as the first two courses in the world in 2D as 3D objects. We give an increase in the left side of the triangle, one on the right side, the side of a post to generate a pyramid (pyramid). To increase the square left, right, up, down and back to generate a cube.