How do I create an arc using a bulge value at runtime?

Can you use 2 workspaces?

 

Workspace1 - reading the parameters from the database and sending to Workspace2 using either WorkspaceRunner or FMEServerWorkspaceRunner 

Yes. But I have more than one polyline, I don't know how many.

Hi Tim,

 

 

Unfortunately, there may not be a transformer that creates an arc from two end points and the bulge. But the FME Objects Python API provides the functionality to do that, so using the PythonCaller could be a solution. Assuming that each input feature has two coordinates (i.e. start and end points) and a bulge as its attributes (named x0, y0, x1, y1, bulge), the PythonCaller with the following script replaces the input feature with an arc feature, for example:

 

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import fmeobjects   class ArcReplacer(object):     def __init__(self):         pass       def input(self, feature):         # Get start (x0, y0), end (x1, y1) and bulge values         # from the input feature.         x0 = float(feature.getAttribute('x0'))         y0 = float(feature.getAttribute('y0'))         x1 = float(feature.getAttribute('x1'))         y1 = float(feature.getAttribute('y1'))         bulge = float(feature.getAttribute('bulge'))                  # Create start and end points.         p0 = fmeobjects.FMEPoint(x0, y0, 0)         p1 = fmeobjects.FMEPoint(x1, y1, 0)                  # Create an arc geometry object.         arc = fmeobjects.FMEArc((p0, p1), bulge)                  # Create new feature having the arc and output it.          newFeature = feature.cloneAttributes()         newFeature.setGeometry(arc)         self.pyoutput(newFeature)              def close(self):         pass

 

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Takashi

 

P.S. You can replace the last 3 lines of the input method with the next 2 lines. This probably is more efficient. -----         # Set the arc geometry to the input feature.         feature.setGeometry(arc)         self.pyoutput(feature) -----

 

 

Takashi

 

Thanks, I will try the pythoncaller.

 

/Tim