topic Re: [InternalValidationError] Get RuntimeError when using custom joint direction axis in Fusion API and Scripts Forum

[InternalValidationError] Get RuntimeError when using custom joint direction axis

NuofanQiu — Mon, 03 Jul 2023 09:49:25 GMT

I am trying to create a revolute joint using custom joint axis, but I got an error:

RuntimeError: 2 : InternalValidationError : Utils::getObjectPath(object, objPath, nullptr, context)

And I searched at this forum, here are the relative posts:

https://forums.autodesk.com/t5/fusion-360-api-and-scripts/copy-body-and-move-by-code/m-p/10554409

https://forums.autodesk.com/t5/fusion-360-api-and-scripts/trouble-scaling-after-copying-and-moving-component/m-p/11327405

https://forums.autodesk.com/t5/fusion-360-api-and-scripts/add-rectangular-pattern-feature-to-component/m-p/11355874

https://forums.autodesk.com/t5/fusion-360-api-and-scripts/rotate-imported-step-file-using-api-fully-scripted/m-p/9582766

But I did not get a solution from the posts above.

Here are my script:

#Author- #Description- import adsk.core, adsk.fusion, adsk.cam, traceback import math def generateBox(x, y, z, rootCom: adsk.fusion.Component) -> adsk.fusion.Component: """ generate a box component inside rootComponent x, y, z unit: m return: component generated by extrude object """ extrudes = rootCom.features.extrudeFeatures x = x*100.0 # convert from m to cm y = y*100.0 z = z*100.0 # Create a new sketch on the xy plane sketches = rootCom.sketches xyPlane = rootCom.xYConstructionPlane sketch = sketches.add(xyPlane) # Draw a rectangle on the xy plane point1 = adsk.core.Point3D.create(-x/2, y/2, 0.0) point2 = adsk.core.Point3D.create(x/2, y/2, 0.0) point3 = adsk.core.Point3D.create(x/2, -y/2, 0.0) point4 = adsk.core.Point3D.create(-x/2, -y/2, 0.0) sketch_lines = sketch.sketchCurves.sketchLines line1 = sketch_lines.addByTwoPoints(point1, point2) line2 = sketch_lines.addByTwoPoints(point2, point3) line3 = sketch_lines.addByTwoPoints(point3, point4) line4 = sketch_lines.addByTwoPoints(point4, point1) # Get the profile defined by the four lines prof = sketch.profiles.item(0) # Define the distance to extrude distance = adsk.core.ValueInput.createByReal(z) # extrude = extrudes.addSimple(prof, distance, adsk.fusion.FeatureOperations.NewBodyFeatureOperation) extrude = extrudes.addSimple(prof, distance, adsk.fusion.FeatureOperations.NewComponentFeatureOperation) return extrude.parentComponent def rotateZ(degree)->adsk.core.Matrix3D: """ retrun a transform matrix to rotate about world frame's z-axis with degree """ rotZ = adsk.core.Matrix3D.create() rotZ.setCell(0, 0, math.cos(math.radians(degree))) rotZ.setCell(1, 0, math.sin(math.radians(degree))) rotZ.setCell(2, 0, 0.0) rotZ.setCell(3, 0, 0.0) rotZ.setCell(0, 1, -math.sin(math.radians(degree))) rotZ.setCell(1, 1, math.cos(math.radians(degree))) rotZ.setCell(2, 1, 0.0) rotZ.setCell(3, 1, 0.0) rotZ.setCell(0, 2, 0.0) rotZ.setCell(1, 2, 0.0) rotZ.setCell(2, 2, 1.0) rotZ.setCell(3, 2, 0.0) rotZ.setCell(0, 3, 0.0) rotZ.setCell(1, 3, 0.0) rotZ.setCell(2, 3, 0.0) rotZ.setCell(3, 3, 1.0) def run(context): ui = None try: app = adsk.core.Application.get() ui = app.userInterface textPalette = ui.palettes.itemById("TextCommands") if not textPalette.isVisible: textPalette.isVisible = True # doc = app.documents.add(adsk.core.DocumentTypes.FusionDesignDocumentType) product = app.activeProduct design = adsk.fusion.Design.cast(product) # design.designType = adsk.fusion.DesignTypes.ParametricDesignType # design.designType = adsk.fusion.DesignTypes.DirectDesignType rootComp = design.rootComponent extBox = generateBox(0.1, 0.1, 1, rootComp) # textPalette.writeText("num of bRepBodies: {}".format(extBox.bRepBodies.count)) extBody = extBox.bRepBodies.item(0) # textPalette.writeText("num of bRepFaces: {}".format(extBody.faces.count)) extJointFace1 = extBody.faces.item(4) # item 4 is the end extrude face, item 5 is the start extrude face point1 = extJointFace1.centroid # Define a axis of rotation # This can be a linear BRepEdge, ConstructionAxis, or a SketchLine sketches1 = extBox.sketches sketch = sketches1.add(extJointFace1) sketchOrigin = sketch.origin sketchOriginPoint = sketch.originPoint theta = 30 # degree sketchPoint1 = adsk.core.Point3D.create(0.0, 0.0, 0.0) sketchPoint2 = adsk.core.Point3D.create(math.cos(math.radians(theta))*10, math.sin(math.radians(theta))*10, 0.0) sketchLine = sketch.sketchCurves.sketchLines.addByTwoPoints(sketchPoint1, sketchPoint2) # jointGeo = adsk.fusion.JointGeometry.createByCurve(sketchLine, adsk.fusion.JointKeyPointTypes.StartKeyPoint) # Create the joint geometry jointGeo = adsk.fusion.JointGeometry.createByPlanarFace(extJointFace1, None, adsk.fusion.JointKeyPointTypes.CenterKeyPoint) jointOrigins = extBox.jointOrigins jointOriginInput = jointOrigins.createInput(jointGeo) jointOrigin1 = jointOrigins.add(jointOriginInput) # jointXAxis = jointOrigin1.secondaryAxisVector extBox2 = generateBox(0.1, 0.1, 0.5, rootComp) extBody2 = extBox2.bRepBodies.item(0) extJointFace2 = extBody2.faces.item(4) jointGeo2 = adsk.fusion.JointGeometry.createByPlanarFace(extJointFace2, None, adsk.fusion.JointKeyPointTypes.CenterKeyPoint) jointOrigins2 = extBox2.jointOrigins jointOriginInput2 = jointOrigins.createInput(jointGeo2) jointOrigin2 = jointOrigins2.add(jointOriginInput2) # Create jont joints = rootComp.joints jointInput = joints.createInput(jointOrigin1, jointOrigin2) # jointInput.setAsRevoluteJointMotion(adsk.fusion.JointDirections.XAxisJointDirection) jointInput.setAsRevoluteJointMotion(adsk.fusion.JointDirections.CustomJointDirection, sketchLine) joint1 = joints.add(jointInput) except: if ui: ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))

In the script, I first generate two box and set up joint origins, then I draw a sketch line as the custom joint axis. After that, I joint them together, but got an error.

So, how to set up a custom joint axis for a revolute joint?

Thanks a lot.

Re: [InternalValidationError] Get RuntimeError when using custom joint direction axis

kandennti — Mon, 03 Jul 2023 13:08:49 GMT

Hi @NuofanQiu -San.

I do not understand what you want to do.
Could you please attach an f3d file with GUI manipulation of what state you want to achieve?

Re: [InternalValidationError] Get RuntimeError when using custom joint direction axis

kandennti — Mon, 03 Jul 2023 13:52:20 GMT

@NuofanQiu -San.

I could not use sketchLine on the rotational axis of the joint even though I manipulated it in the GUI.
Therefore, we tried using ConstructionAxis.

・・・ # Create jont joints = rootComp.joints jointInput = joints.createInput(jointOrigin1, jointOrigin2) # jointInput.setAsRevoluteJointMotion(adsk.fusion.JointDirections.XAxisJointDirection) # jointInput.setAsRevoluteJointMotion(adsk.fusion.JointDirections.CustomJointDirection, sketchLine) axisLine: adsk.fusion.ConstructionAxis = get_revolute_axis(rootComp, sketchPoint1, sketchPoint2) jointInput.setAsRevoluteJointMotion(adsk.fusion.JointDirections.CustomJointDirection, axisLine) joint1 = joints.add(jointInput) except: if ui: ui.messageBox('Failed:\n{}'.format(traceback.format_exc())) def get_revolute_axis( comp: adsk.fusion.Component, sPoint: adsk.core.Point3D, ePoint: adsk.core.Point3D, ) -> adsk.fusion.ConstructionAxis: app: adsk.core.Application = adsk.core.Application.get() des: adsk.fusion.Design = app.activeProduct vec: adsk.core.Vector3D = sPoint.vectorTo(ePoint) vec.normalize() infinite: adsk.core.InfiniteLine3D = adsk.core.InfiniteLine3D.create( sPoint, vec, ) baseFeat: adsk.fusion.BaseFeature = None if des.designType == adsk.fusion.DesignTypes.ParametricDesignType: baseFeat = comp.features.baseFeatures.add() axes: adsk.fusion.ConstructionAxes = comp.constructionAxes axisIpt: adsk.fusion.ConstructionAxisInput = axes.createInput() axis: adsk.fusion.ConstructionAxis = None if baseFeat: try: baseFeat.startEdit() axisIpt.setByLine(infinite) axis = axes.add(axisIpt) except: pass finally: baseFeat.finishEdit() else: axisIpt.setByLine(infinite) axis = axes.add(axisIpt) return axis

Re: [InternalValidationError] Get RuntimeError when using custom joint direction axis

NuofanQiu — Mon, 03 Jul 2023 14:23:19 GMT

Thank you for your reply.

Actually what I want to do have post in this post: https://forums.autodesk.com/t5/fusion-360-api-and-scripts/how-to-create-a-custom-joint-direction-for-a-revolute-joint/td-p/12059105

I found it is not easy to create a custom joint axis for a revolute joint even use GUI(maybe I am not familiar with Fusion360).

I found the API description here:

A linear edge, planar face and cylindrical face seems not suitable for the Bennett mechanism, so I tried to use the sketch line as the custom rotation axis.

I will try your method right now! And give you a response as soon as possible.

Thanks again! You are so nice!

Re: [InternalValidationError] Get RuntimeError when using custom joint direction axis

NuofanQiu — Mon, 03 Jul 2023 14:45:39 GMT

Hi @kandennti -San (I just learned 'San' is a respectful title in Japanese)
You code is elegant and easy to understand. I think it solved my problem(although I haven't finished it yet).

I think you are very experienced in Fusion360 API. Do you have any suggestion or tutorial recommendation for learning Fusion360 API? I have read the introduction in Fusion360 API web-site and struggling with Fusion360 API.
I found that you have write several post about Fusion360API on your blog. I will read them. But I do not understand Japanese(I will try some translator), do you have any good English resources that can help me for learning Fusion360 API?
Thanks a lot!

Re: [InternalValidationError] Get RuntimeError when using custom joint direction axis

kandennti — Tue, 04 Jul 2023 01:17:18 GMT

@NuofanQiu -San.

I have not seen any solid tutorials.
The content I do know about is online documentation and @prainsberry -San here.

https://github.com/tapnair/Fusion360APIClass

Also, this forum is a big help.

Re: [InternalValidationError] Get RuntimeError when using custom joint direction axis

NuofanQiu — Tue, 04 Jul 2023 02:48:02 GMT

@kandennti -San
Again, thank you so much!

Re: [InternalValidationError] Get RuntimeError when using custom joint direction axis

huzq1 — Mon, 20 Jan 2025 07:46:44 GMT

Hi, I try this way, but still have runtime error when I add ConstructionAxis to a sub component(to root component is ok). do you know why? Thank you!