TheSwamp

Code Red => AutoLISP (Vanilla / Visual) => Topic started by: mailmaverick on January 16, 2017, 02:32:34 AM

Title: 3DFace, Mesh, Surface and Solid
Post by: mailmaverick on January 16, 2017, 02:32:34 AM
Hi

What is the difference between 3DFace, Mesh, Surface and Solid ?

Title: Re: 3DFace, Mesh, Surface and Solid
Post by: ChrisCarlson on January 16, 2017, 08:02:42 AM
Quite a bit

3dFace - Creates a three-sided or four-sided surface in 3D space.
https://knowledge.autodesk.com/support/autocad/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/AutoCAD-Core/files/GUID-5E88BB23-9110-45FB-B54A-3FF2E2002585-htm.html

Mesh - A mesh model consists of vertices, edges, and faces that use polygonal representation, including triangles and quadrilaterals, to define a 3D shape. Unlike solid models, mesh has no mass properties. However, as with 3D solids, you can create primitive mesh forms such as boxes, cones, and pyramids.
https://knowledge.autodesk.com/support/autocad/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/AutoCAD-Core/files/GUID-A6232957-5039-4AB7-8B1D-8FD0AD98F77B-htm.html

Surface
A surface is a 3D object that is an infinitely thin shell. There are 2 types of surfaces: procedural and NURBS.

Procedural surfaces can be associative, maintaining relationships with other objects so that they can be manipulated as a group.
NURBS surfaces are not associative. Instead, they have control vertices that allow you to sculpt shapes in a more natural way.
https://knowledge.autodesk.com/support/autocad/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/AutoCAD-Core/files/GUID-8218FF9A-6F05-47E7-A39C-47D342B942EB-htm.html

Solid - A solid is a 3D object that has mass
Title: Re: 3DFace, Mesh, Surface and Solid
Post by: mailmaverick on January 17, 2017, 12:04:01 AM
Thanks for the info, I'have just started learning 3D in AutoCAD.
Title: Re: 3DFace, Mesh, Surface and Solid
Post by: lamarn on January 17, 2017, 03:35:03 AM
A 3d mesh can be more 4 points in a Pface. Polyface mesh from 3D faces..
https://knowledge.autodesk.com/support/autocad/learn-explore/caas/CloudHelp/cloudhelp/2017/ENU/AutoCAD-Core/files/GUID-4B0667EF-D8E3-4BD2-A3EE-06CFF164A0A6-htm.html
Title: Re: 3DFace, Mesh, Surface and Solid
Post by: togores on December 30, 2018, 01:14:20 PM
On programming 3D through LISP:
https://www.amazon.com/Programming-Solids-Surfaces-AutoCAD-experts-ebook/dp/B00CEXDZLM/#reader_B00CEXDZLM