#789 – How a Scale Transform Works

A 2D scale transform in WPF is accomplished by using a transformation matrix.  The transformation matrix is multiplied by another matrix representing a single 2D point to be transformed.  The resulting matrix describes the transformed point.  When scaling a user interface element, this transformation is done individually on each point to generate the set of points representing the transformed element.

The transformation operation for scaling looks like:

789-001

Where Sx and Sy represent the ScaleX and ScaleY properties of the ScaleTransform, respectively.

This leads to the equations:

789-002

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 #789 – How a Scale Transform Works

  1. Pingback: #796 – WPF Transforms Use Homogeneous Coordinates | 2,000 Things You Should Know About WPF

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