README.rst

Circles

Circles are drawn by calculating a 2D array of Euclidean distances and clipping:

Here is the code that creates the circle:

.. literalinclude:: circle.py

Hints

• the np.ogrid function creates two 2D-array of the X/Y coordinates
• the square_dist contains the squared distance to the center for each pixel
• for the mask, the rule of Pythagoras is applied to select points inside the circle

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Challenge:

Adopt the code to create patterns from circles, e.g.: