CAD and CAG

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CAD and CAG
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Todays Lesson

• Input/Output devices
• File Storage and management
• CAD modelling
• Software Packages

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Input/Output devices
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2
1
3
8
5
7
6
10
9
13
12
11
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DEVICE NUMBER INPUT/OUTPUT
Mouse 1 Input
Fax 2 Output
Joystick 3 Input
Drum Plotter 4 Output
Keyboard 5 Input
Printer 6 Output
Monitor 7 Output
Digital Camera 8 Input
Trackerball 9 Input
Scanner 10 Input
Graphics Tablet 11 Input
Flatbed Plotter 12 Output
Modem 13 Input and Output
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File Storage and Management

• Files and Folders

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Removable Discs

• Removable discs have three important uses
• Copying/moving files transferring and moving
  files between machines.
• Backing-up files To ensure that there is a
  duplicate copy in case files are accidentally
  corrupted or deleted.
• Archiving files Files that are not being used
  can be removed from the hard drive to free up
  valuable storage space.

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Removable Discs

• Types of Discs
• Zip disc similar to floppy disc but with much
  greater storage. 100MB
• CD-R Optical medium, storage capacity 650MB
• DVD similar to CD, storage capacity 4.7GB
• Memory Stick/Pen Drive more compact, more
  reliable. Storage 128MB,32GB

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3D CAD Modelling (Advantages)

• Can be produced more quickly
• Can be modified more quickly
• Enables the designer to try texture and colour on
  the model

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3D CAD Modelling (Advantages)

• Can be used to test designs before they are
  finished.
• Can be realistically rendered

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3D CAD Modelling (Advantages)

• Can be sent easily to remote locations
• Take up less storage space than built models
• Can be used to create realistic simulations

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CAD Modelling (Types)

• Wireframe Model The object is built up using a
  series of connected lines.
• Surface Model The object is built up by drawing
  the surfaces of an object.
• Solid model Built up using simple geometric
  shapes such as cones, cylinders etc. these can be
  added or subtracted to produce more complex
  models.
• Surface rendered The object is rendered with a
  solid looking surface. Colours, shading and
  textures can be added to produce realistic
  looking images.

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Simulation and Animation

• Animation is moving but it is not interactive.
• Roller coaster animation.
• Simulation the user can interact with the
  programme, e.g. flight simulator.
• Flight simulator