Problem with loft after last Fusion update (plugin doesn't work)

[marcinszydlowski.1984]

Hello everyone,

I use loft in my plugins. After last Fusion update this funcitionality doesn't work as before, I mean clients get errors, no matter loft is through profiles with rails or not. Making loft by UI works (but for rails I need to turn off "Chain selection" checkbox).

I prepared sample script to show one of the case. There's no error messages but lofts are not as expected:

It seems that loft starts from middle profile

Script:

import adsk.core, adsk.fusion

def run(context):
    app = adsk.core.Application.get()
    product = app.activeProduct
    design = adsk.fusion.Design.cast(product)
    rootComp = design.rootComponent

    # Example 1 - same size of profiles but different Z
    sketch1 = rootComp.sketches.add(rootComp.xYConstructionPlane)

    # First profile
    p11 = adsk.core.Point3D.create(0, 2, 0)
    p12 = adsk.core.Point3D.create(2, 0, 0)
    p13 = adsk.core.Point3D.create(0, -1.3, 0)
    p14 = adsk.core.Point3D.create(-1.8, 0, 0)
    p15 = adsk.core.Point3D.create(-1.2, 1, 0)

    sketch1.sketchCurves.sketchLines.addByTwoPoints(p11, p12)
    sketch1.sketchCurves.sketchLines.addByTwoPoints(p12, p13)
    sketch1.sketchCurves.sketchLines.addByTwoPoints(p13, p14)

    points = adsk.core.ObjectCollection.create()
    points.add(p14)
    points.add(p15)
    points.add(p11)

    sketch1.sketchCurves.sketchFittedSplines.add(points)

    # Second profile
    p21 = adsk.core.Point3D.create(0, 2, 4)
    p22 = adsk.core.Point3D.create(2, 0, 4)
    p23 = adsk.core.Point3D.create(0, -1.3, 4)
    p24 = adsk.core.Point3D.create(-1.8, 0, 4)
    p25 = adsk.core.Point3D.create(-1.2, 1, 4)

    sketch1.sketchCurves.sketchLines.addByTwoPoints(p21, p22)
    sketch1.sketchCurves.sketchLines.addByTwoPoints(p22, p23)
    sketch1.sketchCurves.sketchLines.addByTwoPoints(p23, p24)

    points = adsk.core.ObjectCollection.create()
    points.add(p24)
    points.add(p25)
    points.add(p21)

    sketch1.sketchCurves.sketchFittedSplines.add(points)

    # Third profile
    p31 = adsk.core.Point3D.create(0, 2, 10)
    p32 = adsk.core.Point3D.create(2, 0, 10)
    p33 = adsk.core.Point3D.create(0, -1.3, 10)
    p34 = adsk.core.Point3D.create(-1.8, 0, 10)
    p35 = adsk.core.Point3D.create(-1.2, 1, 10)

    sketch1.sketchCurves.sketchLines.addByTwoPoints(p31, p32)
    sketch1.sketchCurves.sketchLines.addByTwoPoints(p32, p33)
    sketch1.sketchCurves.sketchLines.addByTwoPoints(p33, p34)

    points = adsk.core.ObjectCollection.create()
    points.add(p34)
    points.add(p35)
    points.add(p31)

    sketch1.sketchCurves.sketchFittedSplines.add(points)

    # Create loft
    loftFeatures = rootComp.features.loftFeatures
    loftInput = loftFeatures.createInput(adsk.fusion.FeatureOperations.NewBodyFeatureOperation)

    for ip in range(sketch1.profiles.count):
        loftInput.loftSections.add(sketch1.profiles.item(ip))

    loftInput.isSolid = True
    loft = loftFeatures.add(loftInput)

    # Example 2 - different sizes of profiles
    sketch2 = rootComp.sketches.add(rootComp.xYConstructionPlane)
    xShift = 10

    # First profile
    p11 = adsk.core.Point3D.create(0 + xShift, 2, 0)
    p12 = adsk.core.Point3D.create(2 + xShift, 0, 0)
    p13 = adsk.core.Point3D.create(0 + xShift, -1.3, 0)
    p14 = adsk.core.Point3D.create(-1.8 + xShift, 0, 0)
    p15 = adsk.core.Point3D.create(-1.2 + xShift, 1, 0)

    sketch2.sketchCurves.sketchLines.addByTwoPoints(p11, p12)
    sketch2.sketchCurves.sketchLines.addByTwoPoints(p12, p13)
    sketch2.sketchCurves.sketchLines.addByTwoPoints(p13, p14)

    points = adsk.core.ObjectCollection.create()
    points.add(p14)
    points.add(p15)
    points.add(p11)

    sketch2.sketchCurves.sketchFittedSplines.add(points)

    # Second profile
    p21 = adsk.core.Point3D.create(0 + xShift, 4, 4)
    p22 = adsk.core.Point3D.create(4 + xShift, 0, 4)
    p23 = adsk.core.Point3D.create(0 + xShift, -2.6, 4)
    p24 = adsk.core.Point3D.create(-3.6 + xShift, 0, 4)
    p25 = adsk.core.Point3D.create(-2.4 + xShift, 2, 4)

    sketch2.sketchCurves.sketchLines.addByTwoPoints(p21, p22)
    sketch2.sketchCurves.sketchLines.addByTwoPoints(p22, p23)
    sketch2.sketchCurves.sketchLines.addByTwoPoints(p23, p24)

    points = adsk.core.ObjectCollection.create()
    points.add(p24)
    points.add(p25)
    points.add(p21)

    sketch2.sketchCurves.sketchFittedSplines.add(points)

    # Third profile
    p31 = adsk.core.Point3D.create(0 + xShift, 3, 10)
    p32 = adsk.core.Point3D.create(3 + xShift, 0, 10)
    p33 = adsk.core.Point3D.create(0 + xShift, -1.95, 10)
    p34 = adsk.core.Point3D.create(-2.7 + xShift, 0, 10)
    p35 = adsk.core.Point3D.create(-1.8 + xShift, 1.5, 10)

    sketch2.sketchCurves.sketchLines.addByTwoPoints(p31, p32)
    sketch2.sketchCurves.sketchLines.addByTwoPoints(p32, p33)
    sketch2.sketchCurves.sketchLines.addByTwoPoints(p33, p34)

    points = adsk.core.ObjectCollection.create()
    points.add(p34)
    points.add(p35)
    points.add(p31)

    sketch2.sketchCurves.sketchFittedSplines.add(points)

    # Create loft
    loftFeatures = rootComp.features.loftFeatures
    loftInput = loftFeatures.createInput(adsk.fusion.FeatureOperations.NewBodyFeatureOperation)

    for ip in range(sketch2.profiles.count):
        loftInput.loftSections.add(sketch2.profiles.item(ip))

    loftInput.isSolid = True
    loft = loftFeatures.add(loftInput)

When I do this by UI it works:

Order is ok

What should I do to make this work by API?

There's also another problem in case of using rails because I cannot find an equivalent of "Chain Selection" in API. Is it accessible or is it performed on much higher level?

[marcinszydlowski.1984 · Accepted solution]

Solved. If you have similar problems, try to make each profile in dedicated sketch (no matter profile is CW or CCW). If you need rails they also should be in a separate sketch.