2013

Table Of Contents
Start with primitive solids such as cones, boxes, cylinders, and pyramids and
modify and recombine them to create new shapes. Or draw a custom extrusion
and use various sweeping operations to create solids from 2D curves and lines.
Surface Modeling
A surface model is a thin shell that does not have mass or volume. AutoCAD
offers two types of surfaces: procedural and NURBS. Use prodecural surfaces
to take advantage of associative modling, and use NURBS surfaces to take
advantage of sculpting with control vertices.
A typical modeling workflow is to create a basic model using mesh, solids,
and procedural surfaces, and then convert them to NURBS surfaces. This allows
you to utilize not only the unique tools and primitive shapes offered by solids
and meshes, but also the shaping capabilities provided by surfaces - associative
modeling and NURBS modeling.
340 | Chapter 8 Work with 3D Models