Drawing with circular arcs

A method of drawing a smoothly shaped, non-circular, curve in a computer program comprising the steps of:

• selecting a first point;
• selecting a second point different from the first point;
• generating a first directed tangent line which extends from the first point;
• determining a first tangent angle with respect to a coordinate system with a vertex of the first tangent angle located at the first point;
• determining a radius and center of curvature of a first circular arc that connects the first point and the second point and is tangent to the first directed tangent line;
• drawing the first circular arc between the first point and the second point using the radius and center of the curvature of the first circular arc;
• selecting a third point different from the second point;
• determining a second tangent angle with a vertex of the second tangent angle located at the second point;
• determining a radius and center of curvature of a second circular arc that connects the second point and the third point and is tangent to the first circular arc;
• drawing the second circular arc between the second point and the third point to form a smoothly shaped, non-circular, curve with the first circular arc;
• and
• reshaping the smoothly shaped, non-circular, curve by moving at least one of the points, adding additional points, changing the directed tangent line, or by defining the directed tangent line at a different point.