2D to 3D: What's Going On? (Part 1)

In the app below, the 2D figure you see on the left is the same as the 2D figure you see on the right.
Slide the slider (lower left) all the way to the right.
What do you see happening here? Describe as best you can in your own words.
Close
– Tim Brzezinski

Information: 2D to 3D: What's Going On? (Part 1)