How to edit a loft by API

[bjoern79de]

I'm able to remove items from loftFeature.loftSections by:

for section in loftFeat.loftSections:

    section.deleteMe()

But I'm not able to add new profiles:

for sketch in component.sketches:

    loftFeats.loftSections.add(sketch.profiles[0])

"InternalValidationError: entities_size > 0"

Any suggestions?

[kandennti · Accepted solution]

Hi @bjoern79de .

Using the attached file, I was able to process it like an image.

This is the source code.

#Fusion360API Python script
import adsk.core, adsk.fusion, traceback

_app = adsk.core.Application.cast(None)
_ui = adsk.core.UserInterface.cast(None)

def run(context):
    try:
        global _app, _ui
        _app = adsk.core.Application.get()
        _ui = _app.userInterface
        des  :adsk.fusion.Design = _app.activeProduct
        root :adsk.fusion.Component = des.rootComponent

        # get loft
        loft = root.features.loftFeatures.item(0)
        sects :adsk.fusion.LoftSections = loft.loftSections

        # get insert profile
        prof :adsk.fusion.Profile = root.sketches.item(2).profiles.item(0)

        # backup markerPosition
        tlPos :int = des.timeline.markerPosition

        # change timeline before loft
        des.timeline.markerPosition = loft.timelineObject.index

        # get the last LoftSection
        endSect :adsk.fusion.LoftSection = sects.item(sects.count - 1)

        # backup the last entity
        endEnt = endSect.entity

        # change the last LoftSection entity
        # LoftSection.entity was a read/write property
        # https://help.autodesk.com/view/fusion360/ENU/?guid=GUID-E0CE293E-9ED4-4E00-A5E6-32695A0F0A40
        endSect.entity = prof

        # add last entity backed up
        sects.add(endEnt)

        # Restore timeline
        des.timeline.markerPosition = tlPos

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

[kandennti]

Excuse me. I forgot to attach the file.