Bezier Curve

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A Bezier curve is defined by its two end points and two other points which determine the direction the curve approaches its end points.  Mathematically speaking, it is a parametric function where both the x and y functions are cubic polynomials.

 

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Drawing Bezier curves:

 

Click AND HOLD the left mouse button.  This will define End Point 1.
Move the mouse (while holding the button) to End Point 2.
Release the button.
Click AND HOLD the left mouse button.  Move the mouse (while holding the button) until you are at Tangent Point 1.
Release the button.
Click AND HOLD the left mouse button.  Move the mouse (while holding the button) until you are at Tangent Point 2.
Release the button.

 

Bezier curves have almost the same properties as a smoothed line.  The only difference is that you cannot close the curve.

 

Available Parameters for Bezier Curves

 

$length