Creating a loft that is tangent to the surface profile

[Anonymous]

Is there any way in the API to make my loft be tangent to the profile section? In the UI, if a face is selected as a profile for a loft, I have the option to make the loft through that section "Connected (G0)", "Tangent (G1)", or "Curvature (G2)". I cannot find any way to change these options in the API. 

[Anonymous]

I also have a very similar problem, just posted my question then I saw yours! There definitely is a solution, but I couldn't implement it. hope to get some answers!:)

[marshaltu · Accepted solution]

Hello,

Please refer to the following sample how to set end condition.

Thanks,

Marshal

import adsk.core, adsk.fusion, traceback

def run(context):
  ui = None
  try:
    app = adsk.core.Application.get()
    ui  = app.userInterface
    
    design = adsk.fusion.Design.cast(app.activeProduct)
    root = design.rootComponent
    
    plane = adsk.fusion.BRepFace.cast(ui.activeSelections.item(0).entity)
    edgesOnPlane = adsk.core.ObjectCollection.create()
    for item in plane.edges:
        edgesOnPlane.add(item)
    path1 = adsk.fusion.Path.create(edgesOnPlane, adsk.fusion.ChainedCurveOptions.noChainedCurves)
    cylinder = adsk.fusion.BRepFace.cast(ui.activeSelections.item(1).entity)
    edgesOnCylinder = adsk.core.ObjectCollection.create()
    for item in cylinder.edges:
        edgesOnCylinder.add(item)
    path2 = adsk.fusion.Path.create(edgesOnCylinder, adsk.fusion.ChainedCurveOptions.noChainedCurves)
    
    lofts = root.features.loftFeatures
    input = lofts.createInput(adsk.fusion.FeatureOperations.JoinFeatureOperation)
    
    section1 = input.loftSections.add(path1)
    section1.setTangentEndCondition(adsk.core.ValueInput.createByReal(1.0))
    section2 = input.loftSections.add(path2)
    section2.setSmoothEndCondition(adsk.core.ValueInput.createByReal(1.0))
    
    lofts.add(input)

  except:
    if ui:
      ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))

[Anonymous]

Marshall,

Thanks for the help! That is exactly what I needed, except for some reason it will not let me make one of the profiles tangent. I have a body that I mirrored, then I am trying to loft the ends together. I don't know what the difference is but it will only let me apply a tangent geometry to one of the two faces (it's always the same face too, even though I am grabbing the faces the same way for both. 

I can send code if that is easier, but it is kind of a lengthy script.

[marshaltu]

Hello,

Please send me (marshal dot me at autodesk dot com) sample codes and the design to reproduce the issue. 

Thanks,

Marshal

[Anonymous]

I will send you my code. Thank you again!