India ink on Bristol paper, 11x14" (frame not included)
This drawing shows the medial axis of a giraffe. The local thickness is proportional to the medial ball radius at each point along the medial axis. (The stroke width is largest at points that are far from the input polygon perimeter.)
The medial axis has many applications in shape recognition, shape reconstruction, motion planning, and more. After implementing a medial axis algorithm for work, I decided to use it for some plotter drawings, like this one!