Extrude Surfaces same plane (not on the same plane error)

[sebmorales]

Hola!

I am having some problems with a script that will slice a part with a plane, then project the intersection of the part with the plane on a sketch. Finally, it will extrude those profiles (as surfaces).

The script works fine for most geometries but occasionally crashes giving the error: "input curves are not on the same plane". I don't understand how this is happening since the input curves were created by the plane to begin with.

Any ideas? Is this a bug?

I am attaching a sample file where this problem occurs as well as the script where this occurs (it is attached as txt because it wouldn't let me upload a .py file).

Thanks!

Sebastian

#Author-
#Description-

import adsk.core, adsk.fusion, adsk.cam, traceback
app = adsk.core.Application.get()
if app:
    ui = app.userInterface

def run(context):
    try:
        activeDoc = adsk.core.Application.get().activeDocument

        design = activeDoc.design

        rootComp = design.rootComponent 

        rootComp.occurrences.addNewComponent (adsk.core.Matrix3D.create()).component.name=("extrusions")

        modelMinZ=rootComp.boundingBox.minPoint.z+0.002

        planes=rootComp.constructionPlanes

        planeInOff=planes.createInput()

        planeInOff.setByOffset(rootComp.xYConstructionPlane,adsk.core.ValueInput.createByReal(modelMinZ))

        planeMin=planes.add(planeInOff)

        planeMin.isLightBulbOn=False

        sketches= rootComp.sketches

        sketch = sketches.add(planeMin)

        body = rootComp.bRepBodies.item(0)

        sketch.projectCutEdges(body)

        extrudesComp = rootComp.occurrences.itemByName("extrusions:1").component

        extrudes = extrudesComp.features.extrudeFeatures

        distance = adsk.core.ValueInput.createByReal(2)

        curves=sketch.sketchCurves.item(0)

        profileCollection = adsk.core.ObjectCollection.create()

        profileCollection.add(rootComp.createOpenProfile(curves))

        extrudeInput = extrudes.createInput(profileCollection, adsk.fusion.FeatureOperations.NewBodyFeatureOperation)
    
        extrudeInput.isSolid = False

        extrudeInput.setDistanceExtent(False, distance)

        extrude = extrudes.add(extrudeInput)


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

[ekinsb · Accepted solution]

There does appear to be a problem in the API that I'll log a bug for.

However, there's another approach that is better and works.  If you remove the crossed out lines below and add the code in red, it works.

        curves=sketch.sketchCurves.item(0)

        profileCollection = adsk.core.ObjectCollection.create()

        profileCollection.add(rootComp.createOpenProfile(curves))
        
        prof = sketch.profiles.item(0)

        extrudeInput = extrudes.createInput(prof, adsk.fusion.FeatureOperations.NewBodyFeatureOperation)

[sebmorales]

Awesome! This works pretty well. Do you know how this could work in case the profile was open? Lets say the input body is not solid but a surface? 

Thanks!

[ekinsb]

I'm not finding a way that works with an open profile.  We're in the process of changing the concept of a Profile so that Profiles should only be used for closed 2D sections.  Paths should be used for open and/or 3D sets of connected curves.  With this new concept, you should be creating a Path instead of a Profile, but I tested that too and it also has a problem.  I've logged both of the issues so we can get them fixed.  The only thing I found that worked is if I just extrude one curve at a time.

[sebmorales]

That sounds ideal, and thoughts for when this might be released? I just want to know if I should try to fix it now another way or if I should just wait. 

Thank you for taking a dive at it though!

Sebastian