Page 731 - Kitab3DsMax

Chapter 26: Deforming Surfaces and Using the Mesh Modifiers
Extrude modifier
The Extrude modifier can be applied only to spline or shape objects, but the resulting extrusion can be a
Patch, Mesh, or NURBS object. This modifier copies the spline, moves it a given distance, and connects the
two splines to form a 3D shape. Parameters for this modifier include an Amount value, which is the dis-
tance to extrude, and the number of segments to use to define the height. The Capping options let you
select a Start Cap and/or an End Cap using either a Morph or Grid option. The Morph option divides the
caps into long, thin polygons suitable for morph targets, and the Grid option divides the caps into a tight
grid of polygons suitable for deformation operations. The Cap fills the spline area and can be made as a
Patch, Mesh, or NURBS object. Only closed splines that are extruded can be capped. You can also have
mapping coordinates and Material IDs generated automatically. The Smooth option smoothes the extrusion.
Cross-Ref
Chapter 12, “Drawing and Editing 2D Splines and Shapes,” includes a good example of the Extrude modifier. n
Face Extrude modifier
The Face Extrude modifier extrudes the selected faces in the same direction as their normals. Face Extrude
parameters include Amount and Scale values and an option to Extrude From Center. Figure 26.7 shows a
mesh object with several extruded faces. The Mesh Select modifier was used to select the faces, and the
extrude Amount was set to 30.
FIGURE 26.7
Extruded faces are moved in the direction of the face normal.

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