Bezier Curves through points
A tool to create Bézier curves that pass through user selected data points
Bezier Curves through points

This extension is similar to the Bezier Curve Tool from the SketchUp Team except that this draws the Bezier curves to pass through the points you select instead of using them as the control points for the curves.

To draw the Bezier curves:

  1. Choose Draw > Bezier Curves through points
  2. Set the degree of the curve in the Value Control Box(VCB) to be one less than the number of points you want the curve to pass through. You can change this value at any time, even after you start creating a curve.
  3. Click to set a start point
  4. Click again to set the end point of the curve
  5. Click to set the intermediate points you want the curve to pass through
  6. Repeat the steps from 2. to get all the curves you need

Also, shamelessly plugging a couple of paid extensions of mine, once the curve(s) have been created, you can use the Bezier Curve Manager to modify them further if required or use B-Spline Curves through points to create the curves with more options.