Recently I made small tutorial on lines and curves, that helps to see and understand them
Hope you like it.
Anatomy of line
Ever wondered how experienced artists draw pretty good pictures with only few line strokes . This tutorial can help you gain line economy which you see in their drawings.
To understand the principles of line drawing you need to know the anatomy of line, or how many strokes are in each line you draw.
This is the basic line
The next step is S-curve, which consists of 2 basic lines
So the basic line is curve which goes clockwise or counterclockwise only, and the place it changes direction is where new basic line starts.
The exercise to understand it is drawing "eights" - blob things created with basic lines, with direction change at intersection first, then more complex with direction change shifts.