The Curve Explorer tool (which makes use of the Uize.Curve, Uize.Curve.Rubber, and Uize.Curve.Mod modules, among others) provides a UI for visualizing and experimenting with curve functions.

This tool lets you select from a large number of preset curves in its "PRESETS" tab. Upon selecting a preset curve, a preview of the selected curve will be generated, made up of a graph that plots the curve's values, a color gradient that represents the curve's values using dark blue for 0 and light blue for 1, and an animation of the UIZE logo that uses the selected curve to control its motion. The curve expression for the selected curve preset is shown in the "PARAMS" tab. By selecting this tab, you get to see the curve expression and modify it to produce new curves. Here you can play around with the parameters in a curve expression - if present - to see how they affect the curve, or you can add more complexity by using the curve modifiers defined in the Uize.Curve.Mod package. A "PREVIEW CURVE" button lets you preview the changes you make. A wide variety of curve presets are provided to get you started, from the most basic built-ins to complex curves that combine many built-in curves into complex expressions using curve modifiers.

CHECK IT OUT