An Introduction To AutoCAD 3D Modelling Tools - PowerPoint PPT Presentation

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An Introduction To AutoCAD 3D Modelling Tools

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AutoCAD is a commercial computer-aided design (CAD) and drafting software application. It was first time released by Autodesk in 1982 as a desktop app running on microcomputers with internal graphics controllers. – PowerPoint PPT presentation

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Title: An Introduction To AutoCAD 3D Modelling Tools


1
An Introduction To AutoCAD 3D Modelling
Toolshttp//crbtech.in/CAD-CAM-Training/
2
Introduction to AutoCAD
  • AutoCAD is a commercial computer-aided design
    (CAD) and drafting software application. It was
    first time released by Autodesk in 1982 as a
    desktop app running on microcomputers with
    internal graphics controllers.

3
3D Co-ordinate systems
  • Absolute 3D co-ordinate system
  • In this 3D co-ordinate systen, XY plane is
    assumed as parallel to the computer screen and
    Z axis is assumed as perpendicular to the screen
    of the computer projecting outward.

4
  • Relative cylindrical co-ordinate system
  • In this co-ordinate system, suppose we want to
    plot a point which is located at (4, lt30, 5),then
    5 is marked using relative cylindrical
    co-ordinate system.Then it is marked at 4 units
    from the last reference point along x axis, 30
    degrees from the x-axis measured.

5
  • Relative spherical co-ordinate system
  • In this type of co-ordinate system, a point at
    (5,lt30,lt40 )is at 5 units from the last reference
    point along x axis, 30 degrees from the x-axis
    measured in the anticlockwise direction in xy
    plane and 40 degrees up from xy plane.

6
Types of 3D modelling
  • Wire frame modelling
  • In this type of modelling, objects are
    represented in 3D representation by using lines,
    arcs and circles. It is contains only edge
    details and therfore does not have surfaces. Only
    skeletal are shown.

7
  • Surface modelling
  • In this type of modelling 3D objects are
    represented by using opaque surfaces . The inner
    portion of the object is hollow. The details
    behind the surfaces are not shown.

8
  • Solid modelling
  • In this type of modelling, 3D solid objects are
    is produced. It looks like a solid object which
    is made of wood. Hence it can be cut into
    pieces. Therefore it is easy to determine mass
    properties of solid models.

9
  • Thank You !
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