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Create a Polyface Mesh
The PFACE command produces a polyface (polygon) mesh, with each face
capable of having numerous vertices. PFACE is typically used by applications
rather than by direct user input.
Creating a polyface mesh is like creating a rectangular mesh. To create a
polyface mesh, you specify coordinates for its vertices. You then define each
face by entering vertex numbers for all the vertices of that face. As you create
the polyface mesh, you can set specific edges to be invisible, assign them to
layers, or give them colors.
To make the edge invisible, enter the vertex number as a negative value. For
instance, to make the edge between vertices 5 and 7 invisible in the following
illustration, you enter the following:
Face 3, vertex 3: -7
In the illustration, face 1 is defined by vertices 1, 5, 6, and 2. Face 2 is defined
by vertices 1, 4, 3, and 2. Face 3 is defined by vertices 1, 4, 7, and 5, and face
4 is defined by vertices 3, 4, 7, and 8.
402 | Chapter 8 Work with 3D Models
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