0004029: Pocket operation yields invalid result with "Refine = True" - FreeCAD Tracker

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ID	Project	Category	View Status	Date Submitted	Last Update

0004029	PartDesign	Bug	public	2019-06-19 08:38	2021-02-06 06:43

Reporter	fabrico	Assigned To
Priority	normal	Severity	minor	Reproducibility	always
Status	confirmed	Resolution	open
Platform	AMD64	OS	Ubuntu	OS Version	18.04.2 LTS
Product Version	0.18
Target Version	0.20

Summary	0004029: Pocket operation yields invalid result with "Refine = True"
Description	Certain pocket geometries yield invalid results with missing surfaces or distorted shapes when their "Refine" property is set to "True". See examples in the forum thread for details. forum thread
Steps To Reproduce	Use Part Design Workbench in the provided file. Behavior1: 1) Open the attached file. 2) Create a new sketch on the front face of the part. 3) Draw a circle somewhere on the face of the part. 4) Close the sketch. 5) Attempt to create a pocket with the sketch. 6) The part disappears. 7) Cancel the pocket task. 8) Hover over "Body" in the tree. 9) An error message appears: "Tip shape is empty (but must be executed)" Behavior2: 1) Open the attached file. 2) Right click on "SubtractivePipe" in the tree. 3) Select "Set tip". 4) Create a new sketch on the front face of the part. 5) Draw a circle somewhere on the face of the part. 6) Close the sketch. 7) Attempt to create a pocket with the sketch. 8) The pocket is created. 9) Click OK for the pocket task. 10) No error is evident. openBrain's posted reply revealed that the part had a missing surface before the attempted pocket. This missing surface is the evidence of the bug. openBrain : it seems user level root cause is that setting "Refine=True" on the CableSlitPocket in the example file fails (a face vanishes leading to an invalid solid). Setting "Refine=False" solves the problem. Moreover, despite step 3 of Behavior2 may prevent the bug to happen, there is still a missing face.
Additional Information	OS: Ubuntu 18.04.2 LTS Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.18.1. Build type: Release Python version: 3.6.7 Qt version: 5.9.5 Coin version: 4.0.0a OCC version: 7.3.0 Locale: English/UnitedStates (en_US)
Tags	No tags attached.

FreeCAD Information

fabrico 2019-06-19 08:38 reporter	test.FCStd (150,534 bytes)

openBrain 2019-06-19 10:57 developer ~0013260	@fabrico : I added some details in your ticket so devs hopefully don't have to go to the forum to get a basic understanding of the possible cause. Hope you're OK with that. ;)

yorik 2022-03-03 13:55 administrator ~0016783	This ticket has been migrated to GitHub as issue 5949.

Date Modified	Username	Field	Change
2019-06-19 08:38	fabrico	New Issue
2019-06-19 08:38	fabrico	File Added: test.FCStd
2019-06-19 10:34	openBrain	Severity	feature => minor
2019-06-19 10:55	openBrain	Summary	Pocket operation yields invalid result. => Pocket operation yields invalid result with "Refine = True"
2019-06-19 10:55	openBrain	Description Updated
2019-06-19 10:55	openBrain	Steps to Reproduce Updated
2019-06-19 10:57	openBrain	Note Added: 0013260
2019-06-19 14:58	Kunda1	Status	new => confirmed
2019-06-19 14:58	Kunda1	Target Version	=> 0.19
2021-02-06 06:43	abdullah	Target Version	=> 0.20