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AutoCAD Â® 2009 Tutorial: 3D Modeling Introduction As illustrated in the previous chapters, there are no ...
Material Copyrighted Material AutoCAD 2009 provides three basic methods for creating surfaces – the 2D Solid, 3D Face and Region commands. The three commands were developed parallel to the historical development of the different types of computer modelers.
• 2D Solid: The first generation surface command available in AutoCAD. Used mostly to fill an area in the sketch plane of the current UCS. This type of surface is not a true 3D surface.
• 3D Face: Creates a true 3D planar surface (allowing X, Y and Z coordinates) of three-sided or four-sided shape. This is the type of surface developed primarily for creating faceted surface models.
• Region: Creates a 2D surface of arbitrary shape from existing 2D entities. This command creates the most flexible and the most complicated type of surface available in AutoCAD. This command was developed to allow manipulation of 2D surfaces using one of the solid modeling construction techniques, namely, the Constructive Solid Geometry
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