topic Re: Rounding Issues With A Matrix in Fusion API and Scripts Forum

Rounding Issues With A Matrix

Joshua.mursic — Sat, 28 Sep 2024 01:07:49 GMT

I am getting this error when trying to perform a transform on a sketch.

RuntimeError: 2 : InternalValidationError : xlMat->isValidNonScaledTransformMatrix()

I made this to try and force the matrix to by valid

def forcePlanar(matrix:adsk.core.Matrix3D): o,x,y,z = matrix.getAsCoordinateSystem() app.log("Original Matrix") app.log(f'asArray: {matrix.asArray()}') app.log(f'X length = {x.length}') app.log(f'Y length = {y.length}') app.log(f'Z length = {z.length}') app.log(f'XY Angle = {math.degrees(x.angleTo(y))}') app.log(f'XZ Angle = {math.degrees(x.angleTo(z))}') app.log(f'YZ Angle = {math.degrees(y.angleTo(z))}') app.log(" ") x.normalize() y.normalize() z.normalize() xVec = y.crossProduct(z) if math.degrees(xVec.angleTo(x)) > 90: xVec.scaleBy(-1) xVec.normalize() yVec = xVec.crossProduct(z) if math.degrees(yVec.angleTo(y)) > 90: yVec.scaleBy(-1) yVec.normalize() zVec = xVec.crossProduct(yVec) if math.degrees(zVec.angleTo(z)) > 90: zVec.scaleBy(-1) zVec.normalize() xVec.normalize() yVec.normalize() zVec.normalize() matrix = adsk.core.Matrix3D.create() matrix.setWithCoordinateSystem(o,xVec,yVec,zVec) app.log("Fixed Matrix") app.log(f'asArray: {matrix.asArray()}') app.log(f'X length = {xVec.length}') app.log(f'Y length = {yVec.length}') app.log(f'Z length = {zVec.length}') app.log(f'XY Angle = {math.degrees(xVec.angleTo(yVec))}') app.log(f'XZ Angle = {math.degrees(xVec.angleTo(zVec))}') app.log(f'YZ Angle = {math.degrees(yVec.angleTo(zVec))}') return matrix

But I am still getting this error:

Original Matrix asArray: (-0.9866242022022309, 0.1492357286775443, -0.06558491377514467, 2.5736278824387266, 0.15800404365975573, 0.9744559705989259, -0.15959412129295647, -0.7649845830225152, -0.040092465825598715, 0.16782210417637858, 0.9850016931629284, 1.7089296320501064, 0.0, 0.0, 0.0, 1.0) X length = 0.9999999999999997 Y length = 0.9999999999999998 Z length = 0.9999999999999999 XY Angle = 90.0 XZ Angle = 90.0 YZ Angle = 90.0 Fixed Matrix asArray: (-0.9866242022022313, 0.14923572867754434, -0.06558491377514467, 2.5736278824387266, 0.15800404365975573, 0.9744559705989261, -0.1595941212929565, -0.7649845830225152, -0.04009246582559872, 0.1678221041763786, 0.9850016931629284, 1.7089296320501064, 0.0, 0.0, 0.0, 1.0) X length = 1.0 Y length = 1.0 Z length = 0.9999999999999999 XY Angle = 90.0 XZ Angle = 90.0 YZ Angle = 90.0 Failed: Traceback (most recent call last): line 346, in transformSketch: sketch.transform = matrix ^^^^^^^^^^^^^^^^ File "C:\......\adsk\fusion.py", line 45318, in _set_transform return _fusion.Sketch__set_transform(self, value) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ RuntimeError: 2 : InternalValidationError : xlMat->isValidNonScaledTransformMatrix()

Am I doing something wrong here? I am not sure how to stop the vectors from being ever so slightly not unit length.

Re: Rounding Issues With A Matrix

Joshua.mursic — Sat, 28 Sep 2024 01:14:58 GMT

I also just got an instance where this was the logged fixed matrix and it still errored? Any help would be greatly appreciated, I have no idea why this would give an error.

Fixed Matrix asArray: (-0.28937833718712835, -0.92790170939954, 0.23507146926036046, -1.8945223767122557, -0.9572147900317696, 0.2804771032288191, -0.07122106646776495, -0.058936886759475254, -0.00015398457080906255, 0.2456237208776513, 0.9693652376844187, 0.890460203796084, 0.0, 0.0, 0.0, 1.0) X length = 1.0 Y length = 1.0 Z length = 1.0 XY Angle = 90.0 XZ Angle = 90.0 YZ Angle = 90.0

Here is how I am transforming the sketches

for sketch in occurrence.component.sketches: mat = sketch.transform mat.transformBy(transformationMatrix) mat = forcePlanar(mat) sketch.transform = mat

Re: Rounding Issues With A Matrix

kandennti — Sat, 28 Sep 2024 14:24:36 GMT

Hi @Joshua.mursic -San.

Is that process done in direct mode?

It is stated that a normal sketch in parametric mode will fail.

https://help.autodesk.com/view/fusion360/ENU/?guid=GUID-7b5689f8-c8a6-492f-b9a1-4bcbfe289505

Re: Rounding Issues With A Matrix

Joshua.mursic — Sat, 28 Sep 2024 14:34:20 GMT

it is in direct modelling mode

Re: Rounding Issues With A Matrix

Jorge_Jaramillo — Sat, 28 Sep 2024 19:06:41 GMT

Hi,

I also get the same error trying to transform a component.

Something is not good in that matrix.

How did you get that matrix?

There is a way to rebuild it from scratch (like rotate N° on X axis, then M° o Y, and so on) and not from the values you posted previously?

Regards,

Jorge

Re: Rounding Issues With A Matrix

Joshua.mursic — Sun, 29 Sep 2024 15:31:45 GMT

I am not very familiar with matrices yet, but I think that the issue might be something like this. Where the angles are all 90 and the vectors are of unit length, but the X vector is pointing in the negative direction. I am not sure if this makes a difference or not. I am going to change the functions that are creating the transformation matrices. Thank you everyone for the help!

Re: Rounding Issues With A Matrix

kandennti — Mon, 30 Sep 2024 14:53:28 GMT

@Joshua.mursic -San.

I haven't tried it, but I don't think Fusion360 supports left-handed coordinate systems.