Introduction - If you have any usage issues, please Google them yourself
we must establish our first 3D objects : cube. To show that i s true 3D objects, huh, we should rotating it, then you will see all its surface. Remember : All 3D objects are constituted by the triangle (Translator : magic triangle ah ... Readers : Here we go again), so we are the cube 12 by the triangular composition (six surface, each side needs two triangles, Erliuyishier, multiplication traditional formulas, will not?) .
Packet : 2772263d作图.rar filelist
3.doc