#Acad FACES for 3D Studio
20-Feb-92 16:56:33
Sb: #33805-#Acad FACES for 3D Studio
Fm: Angelo Guarino [DTI Inc] 70323,3375
To: Craig Sharp [Mem TM] 73417,2320
Craig,
We in fact do surface welding, aligning, and offsetting. This will work with
any surface entity:
3D faces …3 & 4 sided
Surface meshes (Rulesurfs, edgesurf, revsurf, etc)
P-face meshes … these may include both 3-sided and 4-sided p-faces
Exploded AME solids (just a collection of P-face meshes).
For instance, you can to the following:
Make a couple RULESURF's which share edges. Also on some other edges, add
some hand drawn 3D faces, and a P-face mesh or 2. Run the SEDIT command,
and with the Join option, "weld" all of these entities into a single mesh.
During this proceedure, all redundant vertecies are removed and the faces
are re-indexed (we also handle the "-" indexes for invisable edges
correctly). Next, using the Align option, all the faces in this mesh are
aligned with the "1st" face of the mesh such that all the surface normals
are consistent. If the 1st face's normal was pointing in the wrong
direction, a Reverse option simple reverses the connectivity (surface normal
direction) for the mesh. If this mesh represents the outside or inside
surface of a constant thickness part, then the SOFFSET command will generate
the other surface (either inside or outside), and seal the edges if
instructed. This new mesh's normals are also consistent with the previos
one.
We really can do these things … really… in not kidding .. <g>
Ang