The clamp expression allows you to restrict a value to within a specified range. If a clamped value exceeds the range in either direction, it returns whichever is closest, the minimum or maximum specified limit.
The Duik script offers three types of limb rigs. Plantigrade, digitigrade, and ungulate. The section below defines these, while the video shows how the reverse kinematics works on each type of leg when using Duik.
When I redesigned donQmedia, I drop a lot of the tutorials. However, I archived them on Vimeo in case anyone wanted to take a look at them. While I might update most of the Stickman-Duik series, I won't be adding the Angie puppet series here. I did want to make the work files available to people interested in this tutorial series, so here they are.