Anamorphic Art Grid (grid reflected in circle)
The square grid inside the circle is reflected in the circle boundary.
Drag 'gridn' to change the no of grid lines.
Work in progress for a maths installation art project with Matt Parker and Katie Steckles.
Can relatively easily make geometric objects inside the circle and reflect them outside to give a template to draw things. Freehand things are less easy in Geogebra so far...