How to get the number of bends?

I count the number of bends in the drawing as opposed to the model.  I count the bend notes on the drawing, so every bend would need a note but our specs call for that.   I must note that we have been creating our own custom bend notes (via a toolkit app) since we started using Pro Engineer version 18, (1999) as ProE had nothing at the time.  So our noting is very consistent.   I am checking notes for valid radii values, "an Up or DN"  and key words like hem, etc.   I would say this gives me about 95% accuracy.   Not perfect but it was what I could deliver. 

I would have a look at ProSmtFeatureDevldimsGet function. The outputs are one array of dimensions (developed lengths of the bends) and one array of surfaces, which are suppose to be the bent surfaces.

The way I see this is to visit all features in the model. Try to filter the non-relevent features (datum planes, point and so on) out.

In the visiting function call ProSmtFeatureDevldimsGet and then get the size of one of the arrays.

I never tested this but at least in theory it should work.

On the other hand the model you are showing is a very good example. For all intents and purposes I expect the result to be 5 bends.

Because the green and yellow sides are the same size, in a practical application this part can be produced with only 3 bend operation.

Interesting exercise.

Thanks a lot for sharing your ideas. 🙏
Based on postings from RPN (count cylindrical surface that are from FACE/GREEN sheetmetal side) and GabrielZaha (number of surfaces returned by ProSmtFeatureDevldimsGet()), I implemented both approaches in a single bend-count-function:

Count the number of bends in a sheetmetal model:
- examining only features of type
- Bend (PRO_FEAT_BEND)
- Wall (PRO_FEAT_WALL)
- Smt Conversion (PRO_FEAT_SMT_CONVERSION)
and sum up each feature's bend count.
- For Bend and Wall features, the bend count is the number of surfaces returned by ProSmtFeatureDevldimsGet().
- For Smt Conversion features, the bend count is the number of cylindrical surfaces that belong to the face (green) sheetmetal side (surface property ProSmtSurfType == PRO_SMT_SURF_FACE, via ProSmtSurfaceTypeGet()).

Remarks:
- Only features with status "active" or "active but unregenerated" are being considered.
- This function gives the same result in both sheetmetal states: bended and flattened.
Background:
ProSmtFeatureDevldimsGet() works ootb in both states (bend/flat) and returns the same number of bends.
For Smt Conversion features, the number of child surfaces remain the same in bend/flat state, they only change their in-/active state.
Thus, by examining both the active and inactive surfaces, the relevant cylindrical surfaces can be found and counted as bend (each one).

⚠️Limitations:
Counts only bends of the specified features (BEND, WALL, SMT_CONVERSION). (Support for unknown/new features must be added, if needed.)

💡 Findings:
For my test case with a bend along a (slightly) curved edge (from a flange feature), this bend-count-function works better than the Creo build-in functionalities 📈 for counting bends:
it does find & count even the curved bend (Creo does not) and counts all other bends correctly.

Screenshots of my test case with 10 bends (Creo counted 9, missed the curved edge):
(config.pro option required for the "Sheetmetal" button (Bend Report) to appear: info_output_format text)