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COMPUTER GRAPHIC

Unit-3: Geometric transformation

A geometric transformation in computer graphics and multimedia applications refers to a change in position, size, shape or orientation of an object or image

2D Transformation

2D Transformation in computer graphics is a process of modifying and re-positioning the existing graphics in 2 dimensions. Transformations help change the object's position, size, orientation, shape, etc.

Types of 2D Transformations:
  1. Translation
  2. Scaling
  3. Rotating
  4. Reflection
  5. Shearing
Read 2d transformation in details
Read 3d transformation in details

Window to Viewport Transformation is the process of transforming 2D world-coordinate objects to device coordinates. Objects inside the world or clipping window are mapped to the viewport which is the area on the screen where world coordinates are mapped to be displayed.

General Terms:

  • World coordinate – It is the Cartesian coordinate w.r.t which we define the diagram, like Xwmin, Xwmax, Ywmin, Ywmax
  • Device Coordinate –It is the screen coordinate where the objects are to be displayed, like Xvmin, Xvmax, Yvmin, Yvmax
  • Window –It is the area on the world coordinate selected for display.
  • ViewPort –It is the area on the device coordinate where graphics is to be displayed.

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