#797 – Scale Transforms Using Homogeneous Coordinates

You can apply a scale transform to a 2D point using a 2 x 2 transformation, multiplying it by a 2 x 1 point matrix.  This results in a second 2 x 1 point matrix that represents the transformed (scaled) point.

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In WPF, however, scaling transforms are done using homogeneous coordinates, which means that we multiply a 3 x 3 transformation matrix by a 3 x 1 point matrix.

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In the resulting 3 x 1 matrix, the first and second rows contain the x and y values of the transformed (scaled) point.

 

About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

One Response to #797 – Scale Transforms Using Homogeneous Coordinates

  1. Pingback: Dew Drop – April 12, 2013 (#1,526) | Alvin Ashcraft's Morning Dew

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