topic Insert STL and Convert to B-REP using Python Script in Fusion API and Scripts Forum

Insert STL and Convert to B-REP using Python Script

Anonymous — Sun, 07 Nov 2021 07:35:48 GMT

Hi everyone,

I'm trying to automate importing a batch of stl files into fusion 360 and converting them to B-REP (the button under mesh --> modify --> convert mesh) using python. Is there any documentation on this?

Thank you!

Best,

Sounak

Re: Insert STL and Convert to B-REP using Python Script

kandennti — Sun, 07 Nov 2021 13:10:21 GMT

Hi @Anonymous .

I converted the OBJ file to BRepBody here. I think it can be used in STL with a few modifications.

https://forums.autodesk.com/t5/fusion-360-api-and-scripts/insert-obj-file/m-p/9640466#M10730

However, if the number of faces in one body is more than 10,000, a warning dialog appears, and if the number of faces is more than 50,000, it cannot be processed. This is the same even if you use the GUI.
To avoid this problem, here is a sample of how to split a body until the number of faces in a body is less than 10000, and then convert it.
However, it is all written in Japanese.

https://kantoku.hatenablog.com/entry/2021/04/27/171136

Re: Insert STL and Convert to B-REP using Python Script

Anonymous — Sun, 07 Nov 2021 16:38:33 GMT

Hi kandennti ,

Thank you for the python script examples. I've modified the first script to import an STL file. However, I noticed that file explorer pops up, and I still need to manually click on the file I want to work with. Is there any way to automate this part by adding a file path? I've included the modified code below. I mainly changed lines 15, 49, and 80.

Thank you!

Best,

Sounak

# Fusion360API Python script by kantoku # Mesh2BRep sample # Changed to Import STL 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 # select files paths = selectFiles('select STL file') if not paths: return # new doc _app.documents.add(adsk.core.DocumentTypes.FusionDesignDocumentType) des :adsk.fusion.Design = _app.activeProduct des.designType = adsk.fusion.DesignTypes.ParametricDesignType root :adsk.fusion.Component = des.rootComponent # baseFeature baseFeatures = root.features.baseFeatures baseFeature = baseFeatures.add() baseFeature.startEdit() # import obj files meshs = importMesh(paths ,root.meshBodies, baseFeature) # Mesh2BRep #execMesh2BRep(meshs) #baseFeature.finishEdit() # finish _ui.messageBox('Done') except: if _ui: _ui.messageBox('Failed:\n{}'.format(traceback.format_exc())) def execMesh2BRep( meshBodies): # select meshBody for mesh in meshBodies: _ui.activeSelections.add(mesh) # show Mesh2BRep Command dialog _app.executeTextCommand(u'Commands.Start Mesh2BRepCommand') # push OK button _app.executeTextCommand(u'NuCommands.CommitCmd') def importMesh( paths :list, meshBodies :adsk.fusion.MeshBodies, baseFeature :adsk.fusion.BaseFeature) -> list: unitCm = adsk.fusion.MeshUnits.CentimeterMeshUnit bodies = [] for path in paths: meshLst = meshBodies.add(path, unitCm, baseFeature) [bodies.append(mesh) for mesh in meshLst] return bodies def selectFiles( msg :str): fileDlg = _ui.createFileDialog() fileDlg.isMultiSelectEnabled = True fileDlg.title = msg fileDlg.filter = '*.stl' dlgResult = fileDlg.showOpen() if dlgResult == adsk.core.DialogResults.DialogOK: return fileDlg.filenames

Re: Insert STL and Convert to B-REP using Python Script

kandennti — Mon, 08 Nov 2021 05:26:49 GMT

@Anonymous .

The CommandID of the mesh transformation has been changed and is now fixed.

Enter the path of the desired STL file in the "paths" variable to avoid specifying the file in the dialog.

# Fusion360API Python script import adsk.core import adsk.fusion import 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 # import stl files list paths = [ r'C:\temp\hoge.stl', r'C:\temp\piyo.stl', ] # new doc _app.documents.add(adsk.core.DocumentTypes.FusionDesignDocumentType) des :adsk.fusion.Design = _app.activeProduct des.designType = adsk.fusion.DesignTypes.ParametricDesignType root :adsk.fusion.Component = des.rootComponent # baseFeature baseFeatures = root.features.baseFeatures baseFeature = baseFeatures.add() baseFeature.startEdit() # import obj files meshs = importMesh(paths ,root.meshBodies, baseFeature) # Mesh2BRep execMesh2BRep(meshs) baseFeature.finishEdit() # finish _ui.messageBox('Done') except: if _ui: _ui.messageBox('Failed:\n{}'.format(traceback.format_exc())) def execMesh2BRep( meshBodies): # select meshBody for mesh in meshBodies: _ui.activeSelections.add(mesh) # show ParaMeshConvertCommand Command dialog _app.executeTextCommand(u'Commands.Start ParaMeshConvertCommand') # push OK button _app.executeTextCommand(u'NuCommands.CommitCmd') def importMesh( paths :list, meshBodies :adsk.fusion.MeshBodies, baseFeature :adsk.fusion.BaseFeature) -> list: unitCm = adsk.fusion.MeshUnits.CentimeterMeshUnit bodies = [] for path in paths: meshLst = meshBodies.add(path, unitCm, baseFeature) [bodies.append(mesh) for mesh in meshLst] return bodies

Re: Insert STL and Convert to B-REP using Python Script

Anonymous — Mon, 08 Nov 2021 05:55:44 GMT

Hi kandennti,

Thank you for the help! Here's the new code implementing the ParaMeshConvertCommand.

import adsk.core, adsk.fusion, adsk.cam, traceback import os def run(context): ui = None try: app = adsk.core.Application.get() ui = app.userInterface test_name = '1test_file' #Find project by name # Get the root folder of the project for data_file in app.activeDocument.dataFile.parentFolder.dataFiles: #if data_file.fileExtension == 'stl': if test_name == data_file.name: msg = str(data_file.name) ui.messageBox(msg) app.documents.open(data_file) des :adsk.fusion.Design = app.activeProduct root :adsk.fusion.Component = des.rootComponent sels :adsk.core.Selections = ui.activeSelections sels.clear() cmDefs = ui.commandDefinitions for mesh in root.meshBodies: msg = str(mesh.name) ui.messageBox(msg) sels.add(mesh) # show ParaMeshConvertCommand Command dialog app.executeTextCommand(u'Commands.Start ParaMeshConvertCommand') # push OK button app.executeTextCommand(u'NuCommands.CommitCmd') #cmDef = cmDefs.itemById("ParaMeshConvertCommand") #cmDef.controlDefinition.isEnabled #cmDef.execute() msg = 'brep conversion complete' ui.messageBox(msg) except: if ui: ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))

I looked at your other examples on how to select meshes. Before, I saw your most recent reply, I was actually trying to use the commandDefinitions to execute the ParaMeshConvert command. If you comment out the text commands and uncomment the commandDefinition lines, I got to the point where I just needed to press the enter key. Just out of curiosity, would you know how I can use keyboard events?

Again, thank you for the help!

Best,

Sounak

Re: Insert STL and Convert to B-REP using Python Script

arndt.grossmann — Tue, 05 Mar 2024 15:50:28 GMT

This used to work until recently. Any ideas why it doesn't anymore?