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We have an IFMEFeature from type FME_GEOM_AGGREGATE.

The window "Feature Information" in FME Desktop displays the IFMEMultipoint property with 299 parts of IFMEPoint.

How can we get these multipoints in the writer plugin?

 

If we call feature->numCoordinates() we got 598 but if we call numParts () or numVertices() we got the correct number of 299.

And if we call feature->getAllCoordinates() we got a list of 598 coordinates, but only 299 of these are correct and the other ones consists of a point with coordinates (1, 1, 0). Where does this point (1,1,0) come from?

The list of coordinates starts with

1,1,0

valid point

1,1,0

valid Point

1,1,0

....

You can iterate over the aggregate programmatically. For example, using Python:

parts = feature.splitAggregate(recurse=True)
for part in parts:
    coord = part.getCoordinate(0)  # First coordinate of the part geometry
    x, y = coorde:2]  # Get first two elements
    print('Coordinate at x = {}, y = {}'.format(x, y))

Documentation: https://docs.safe.com/fme/html/fmepython/api/fmeobjects/_feature/fmeobjects.FMEFeature.splitAggregate.html

Refer to the relevant documentation if you're not using Python.

Thank you very much.

It worked.

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