I have created a blended surface and taken a cross-section through the feature. I then want to use the equation of this curve for an integration calculation. I might be able to use the area under the curve from the massprops information, but it may be difficult to translate the equation. Assuming I can't do this I was hoping to extract the equation that Pro/E is using to define the curve.
As curve is from a surface constructed by b-splines, shouldn't the cross-section curve also have an equation which I can extract?
There may be an easy way to get your final answer without knowing the equation. What information, exactly, do you want. You may be able to set up a datum analysis feature or User Defined Analysis to generate your answer directly from the geometry using BMX.
The batch file there will extract point data out of an iges file and convert it into a *.ibl file that you can read into Pro/E as points. It doesn't matter if the iges files also contains surfaces, lines, etc... it should just grab the points.