Autodesk AUTOSKETCH 8, User Manual

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Chapter 15 3D Effects
While two-dimensional drawings are the basic building blocks of most
projects, it is often helpful to have a three-dimensional view of the project.
AutoSketch features two ways to simulate three-dimensional drawings:
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Parallel and perspective extrusion tools allow you to perform 3D effects on
entities by connecting the original selection set with lines or polygons to
a transformed copy, creating the illusion of depth.
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Isometric transformation tools help you create 3D models of existing
drawing components by transforming entities to appear as if they were
drawn on an isometric grid. You can then assemble the components into
an isometric model.
In addition, you can customize how AutoSketch creates 3D Effects in the
3D Effects Options dialog box. These controls let you control how extruded
entities are rendered, whether text, groups, or symbols are automatically
exploded or ignored during an extrusion, even the colors used to create
extrusion entities.
Using Extrusion Tools
One way to simulate 3D is to place two partially overlapping rectangles then
draw lines between the corresponding corners, creating the illusion of depth.
AutoSketch allows you to simulate 3D objects by drawing parallel extrusion
lines or by drawing extrusion lines toward a single vanishing point.
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3D Parallel Extrusion creates a copy of the selection set that you place in
the drawing. AutoSketch connects corresponding edges with lines or
polygons.
Parallel extrusion Perspective extrusion 3D isometrics