Dragging and changing a curve (image)

[Beat Cornaz]

Hello all,

I've solved my last previous question about dragging and changing a 
line object. Thanks to Martin , Mark &

Now I want to be able to interactively change the shape of a curve, 
defined by a algebraic formula (e.g. y = ax^b + c). This curve is 
drawn on the screen as an image (for now).

Is an images the only possibility for drawing an plot?

I need to know the algebraic formula of the curve after the reshaping 
for further calculations.

possible ways I can think of
  :
1. by changing the a, b and c parameters in response to mouseactions 
on the screen. This I can probably figure out myself. Not the best 
solution in my eyes.

2. By using an EPS image and changing the postscript parameters of 
the curve. I have no idea about if this would be possible and how to 
do that.

3. Is there something in Rev. to create and manipulate Bezier curves? 
Does anyone have experience with Bezier curves? This one I would 
really like.

4. I'm open to any other suggestion.


Thaks a lot for any response, Beat.
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