AutoCAD 3D Solids: Understanding Primitives, Construction, and Positioning, Slides of Engineering Drawing and Graphics

A comprehensive guide on working with autocad 3d solids, focusing on the differences between solids, wireframes, and surfaces, creating primitives such as boxes, cylinders, and spheres, slicing and sectioning solids, and using boolean operations to combine primitives. Additionally, it covers moving primitives into position using object snaps and 3d commands.

Typology: Slides

2012/2013

Uploaded on 03/27/2013

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Learning Goals
Describe How AutoCAD SOLIDs differ from
WireFrames and Surfaces
Create AutoCAD “Primitive” Solids
Box, Wedge, Cylinder, Sphere, etc.
Slice and Section 3D Solids
Use ACAD “Boolean” Operations to create
Solids
Interfere, Union, Subtract
Combine Primitives to Make new Solids
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Learning Goals

  • Describe How AutoCAD SOLIDs differ from WireFrames and Surfaces
  • Create AutoCAD “Primitive” Solids
    • Box, Wedge, Cylinder, Sphere, etc.
  • Slice and Section 3D Solids
  • Use ACAD “Boolean” Operations to create Solids - Interfere, Union, Subtract
  • Combine Primitives to Make new Solids

Constructive Solid Geometry (CSG)

  • Standard “primitive” shapes
  • AutoCAD has six primitives:
    • box, wedge, cone, cylinder, torus, sphere
  • Primitives are moved into place with 3D commands to assemble object
  • Primitive are combined with boolean commands: - union, subtract, interfere

Construct Primitives in Place

  • Use Osnap to locate starting point of primitive on existing geometry
  • Position UCS to locate starting point
  • Reorient UCS to construct cylinders and wedges
  • Cylinder - height in Z axis
  • Wedge - point in X axis (and Z axis)