How to get a OrientedBoundingBox3D from more faces?

maurizio_manzi — Tue, 29 Apr 2025 11:08:04 GMT

Hello,
with this code I get the OrientedBoundingBox3D of the first selected face (item 0).

But how can I get the OrientedBoundingBox3D of ALL the selected faces?

Best regards

Maurizio

brep_face = adsk.fusion.BRepFace.cast(ui.activeSelections.item(0).entity)

# Vector acquisition from eye direction. Just for test

camera: core.Camera = app.activeViewport.camera

vecLength: core.Vector3D = camera.eye.vectorTo(

camera.target

)

vecLength.normalize()

vecWidth: core.Vector3D = vecLength.crossProduct(

camera.upVector

)

vecWidth.normalize()

measMgr: core.MeasureManager = app.measureManager

orientedBBox: core.OrientedBoundingBox3D = measMgr.getOrientedBoundingBox(

brep_face,

vecLength,

vecWidth,

)

Re: How to get a OrientedBoundingBox3D from more faces?

kandennti — Tue, 29 Apr 2025 14:39:28 GMT

Hi @maurizio_manzi -san.

I created a temporary UnionBody.

# Fusion360API Python script import traceback import adsk.core as core import adsk.fusion as fusion def run(context): ui: core.UserInterface = None try: app: core.Application = core.Application.get() ui = app.userInterface des: fusion.Design = app.activeProduct root: fusion.Component = des.rootComponent body: fusion.BRepBody = root.bRepBodies[0] # target faces faces = list(body.faces)[0:3] # Vector acquisition from eye direction. camera: core.Camera = app.activeViewport.camera vecLength: core.Vector3D = camera.eye.vectorTo( camera.target ) vecLength.normalize() vecWidth: core.Vector3D = vecLength.crossProduct( camera.upVector ) # OrientedBoundingBox measMgr: core.MeasureManager = app.measureManager orientedBBox: core.OrientedBoundingBox3D = measMgr.getOrientedBoundingBox( create_union_body(faces), vecLength, vecWidth, ) # dump app.log("*********") app.log(f"CenterPoint:{orientedBBox.centerPoint.asArray()}") app.log(f"LengthDirection:{orientedBBox.lengthDirection.asArray()}") app.log(f"Length:{orientedBBox.length}") app.log(f"WidthDirection:{orientedBBox.widthDirection.asArray()}") app.log(f"Width:{orientedBBox.width}") app.log(f"HeightDirection:{orientedBBox.heightDirection.asArray()}") app.log(f"Height:{orientedBBox.height}") DumpBoundingBox(orientedBBox) ui.activeSelections.clear() [ui.activeSelections.add(f) for f in faces] except: if ui: ui.messageBox('Failed:\n{}'.format(traceback.format_exc())) def create_union_body(faces: list) -> fusion.BRepBody: if len(faces) < 1: return None tmpMgr: fusion.TemporaryBRepManager = fusion.TemporaryBRepManager.get() tmpBody: fusion.BRepBody = tmpMgr.copy(faces[0]) if len(faces) < 2: return tmpBody for face in faces[1:]: tmpMgr.booleanOperation( tmpBody, tmpMgr.copy(face), fusion.BooleanTypes.UnionBooleanType, ) return tmpBody def DumpBoundingBox(bBox: core.OrientedBoundingBox3D): tmpMgr: fusion.TemporaryBRepManager = fusion.TemporaryBRepManager.get() tmpBody: fusion.BRepBody = tmpMgr.createBox(bBox) app: core.Application = core.Application.get() des: fusion.Design = app.activeProduct root: fusion.Component = des.rootComponent baseFeat: fusion.BaseFeature = None if des.designType == fusion.DesignTypes.ParametricDesignType: baseFeat = root.features.baseFeatures.add() bodies: fusion.BRepBodies = root.bRepBodies resBody: fusion.BRepBody = None if baseFeat: baseFeat.startEdit() try: bodies.add(tmpBody, baseFeat) except: pass finally: baseFeat.finishEdit() resBody = baseFeat.bodies[0] else: resBody = bodies.add(tmpBody) resBody.opacity = 0.5

Re: How to get a OrientedBoundingBox3D from more faces?

maurizio_manzi — Wed, 30 Apr 2025 07:08:24 GMT

Thank you very much. This is very helpfull.
Best regards
Maurizio

topic Re: How to get a OrientedBoundingBox3D from more faces? in Fusion API and Scripts Forum

How to get a OrientedBoundingBox3D from more faces?

Re: How to get a OrientedBoundingBox3D from more faces?

Re: How to get a OrientedBoundingBox3D from more faces?