Real-Time Rendering——4.7.2 Perspective Projection 透视投影
Here,parallellinesaregenerallynotparallelafterprojection;rather,theymayconvergetoasinglepointattheirextreme.Perspectivemorecloselymatcheshowweperceivetheworld,i.e.,objectsfartherawayaresmaller.这里平行线一般