0004285: PartWB Bevel/Chamfer command invert surface normal - FreeCAD Tracker

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ID	Project	Category	View Status	Date Submitted	Last Update

0004285	FreeCAD	Bug	public	2020-03-10 14:31	2020-06-09 11:40

Reporter	fc_tofu	Assigned To	wandererfan
Priority	normal	Severity	major	Reproducibility	always
Status	closed	Resolution	fixed
Platform	x64	OS	Windows 10	OS Version	10.0.17763.1039

Summary	0004285: PartWB Bevel/Chamfer command invert surface normal
Description	PartWB, Bevel/Chamfer on 3D Offset solid (positive distance)/Thickness solid causes inverted surface normal.
Steps To Reproduce	Reproduce 1: 1. Create a plane object. Copy and move apart for comparision. 2. use "3D offset" command on above planes to make solid("Fill offset"), one with positive offset, other use negative offset. (Here found another minor issue, "3D offset" command won't toggle off planes' visibility after generating new feature history.) 3. "Chamfer" command on abvove solids. 3.1 surface normal on positive offset solid is inverted, except chamfer area. 3.2 for comparison, surface normal on negative offset solid is correct. Reproduce 2: 1. Create cube 100mm * 100mm * 100mm. 2. Select top face, use Thickness command, 10mm thick 3. Select any edge 4. Chamfer(or Bevel) 5mm. Result: surface normal invert except Chamfer area.
Additional Information	Solid from Extrude/Revolve/Loft/Sweep is not affected by this bug. Discussion: Forum thread
Tags	Chamfer, Part

FreeCAD Information	OS: Windows 10 (10.0) Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.19.19858 (Git) Build type: Release Branch: master Hash: dbe292496b56147c081761084774f42bda56ea90 Python version: 3.7.3 Qt version: 5.12.5 Coin version: 4.0.0a OCC version: 7.3.0 Locale: Chinese/China (zh_CN)

FreeCAD: master 73f086f7 2020-06-07 15:25:18 wandererfan Details Diff	[Part]Fix 0004285 Bad Shape from Chamfer - chamfer was producing invalid shape as output. fix uses shapefix to correct invalid surface/face.		Affected Issues 0004285
	mod - src/Mod/Part/App/FeatureChamfer.cpp		Diff File
FreeCAD: master b7ba72bf 2020-06-07 19:41:52 wandererfan Committer: GitHub Details Diff	Merge pull request 0003579 from WandererFan/prefDirs [Part]Fix 0004285 Bad Shape from Chamfer		Affected Issues 0004285
	mod - src/Mod/Part/App/FeatureChamfer.cpp		Diff File
	mod - src/Mod/TechDraw/Gui/DlgPrefsTechDrawGeneral.ui		Diff File

Date Modified	Username	Field	Change
2020-03-10 14:31	fc_tofu	New Issue
2020-03-10 14:31	fc_tofu	Tag Attached: Chamfer
2020-03-10 14:31	fc_tofu	Tag Attached: Part
2020-03-10 14:31	fc_tofu	File Added: fc019pre_bevel_on_3doffsetsolid.FCStd
2020-03-10 14:31	fc_tofu	File Added: fc019pre_partwb_chamfer_on_thinkness.FCStd
2020-03-10 18:28	openBrain	Status	new => confirmed
2020-06-07 15:31	wandererfan	Assigned To	=> wandererfan
2020-06-07 15:31	wandererfan	Status	confirmed => assigned
2020-06-07 22:49	uwestoehr	Note Added: 0014515
2020-06-07 22:50	uwestoehr	Additional Information Updated
2020-06-09 11:40	wandererfan	Changeset attached	=> FreeCAD master b7ba72bf
2020-06-09 11:40	wandererfan	Changeset attached	=> FreeCAD master 73f086f7
2020-06-09 11:40	wandererfan	Note Added: 0014520
2020-06-09 11:40	wandererfan	Status	assigned => closed
2020-06-09 11:40	wandererfan	Resolution	open => fixed