Rotation in two dimensions

This application calculates the two-dimensional rotation of a point $p$ around an arbitrary fixed point $f$ which is not neccessary the origin. Treating $p$ and $f$ as complex numbers, the 2D rotation is calculated from the formula \[ f+(p-f)\mathrm{e}^{i\theta} \] where $\theta$ is the angle of rotation, positive for counterclockwise.

2D Rotation Calculator

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