Polyface meshes
Polyface meshes were the first 3D objects in AutoCAD. These meshes are based on 3D faces defined by three or four vertices. Only the 3DFACE command is important, as introduced and used in Chapter 5, 3D Primitives and Conversions. Polyface meshes still have one advantage related to other surfaces and meshes: vertices can be stretched easily.
Creating polyface meshes
Besides the important 3DFACE command, some others are available, but mainly used for programming. None of these commands have icons.
If the MESHTYPE variable has value 0; the RULESURF, TABSURF, REVSURF, and EDGESURF commands, which were presented before, create polyface meshes. The result of exploding polyface meshes are 3D faces.
These commands have no Undo option. An error in specifying a vertex requires command cancelation or posterior modification.
The 3DFACE command
The 3DFACE command (alias 3F) creates faces defined by three or four vertices. A single command application allows creating several contiguous faces...
