Slider to control weight Markers to control anchor/control
Supplementing my collection of Bézier Curves! ;-) I suggest this is a better variation of the Bézier to be used in design. It gives more flexibility and control on the slopes. Credits: Dr. Ching-Kuang Shene Research: http://www.cs.mtu.edu/~shene/COURSES/cs3621/NOTES/