Bug 131604 - 3D rotation object with end angle has curious fill for front polygon
Summary: 3D rotation object with end angle has curious fill for front polygon
Status: NEW
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Draw (show other bugs)
Version:
(earliest affected)
Inherited From OOo
Hardware: All All
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords:
Depends on:
Blocks: 3D-Model
  Show dependency treegraph
 
Reported: 2020-03-26 15:52 UTC by Regina Henschel
Modified: 2024-09-30 10:23 UTC (History)
2 users (show)

See Also:
Crash report or crash signature:


Attachments
Collection of 3D rotation shapes (18.46 KB, application/vnd.oasis.opendocument.graphics)
2020-03-26 15:52 UTC, Regina Henschel
Details
How it looks in LibreOffice 7.0 master (85.58 KB, image/png)
2020-05-13 11:54 UTC, Xisco Faulí
Details

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Description Regina Henschel 2020-03-26 15:52:31 UTC
Created attachment 159051 [details]
Collection of 3D rotation shapes

Open attached document. It has some 3D rotation objects. They all have the same gradient as area fill and the same texture projection setting "object specific". They differ in the end angle of the rotation.

The "back"-polygon, that one at angle 0°, shows always the same fill as the generating shape. That is expected. But the "front"-polygon, that one at the end angle, show various fillings. There is no rule visible, why they look this way.

I can image two kind of behaviors
A) Always map the texture the same way to the "front"-polygon. That would be easy to understand. But if end angle comes near to 360°, the fill would look mirrored compared to polygon at 0°.
B) Map the texture mirrored to the "front"-polygon and keep it that way for all angles. That would correspond to extrusion, where texture on front-face and back-face are mirrored too. So at any angle, the blue part would be top-left and the yellow part bottom-right in the example.

Especially confusing are jumps in the texture mapping, e.g. from 225.0° to 225.1°.
Comment 1 Xisco Faulí 2020-05-13 11:54:12 UTC
Reproduced in

Version: 7.0.0.0.alpha1+
Build ID: 1ffe59ef31186e36ad0aa7bbcdd32e407ee8d26c
CPU threads: 4; OS: Linux 4.19; UI render: default; VCL: gtk3; 
Locale: en-US (en_US.UTF-8); UI: en-US
Calc: threaded
Comment 2 Xisco Faulí 2020-05-13 11:54:38 UTC
Created attachment 160752 [details]
How it looks in LibreOffice 7.0 master
Comment 3 QA Administrators 2022-09-30 03:52:37 UTC Comment hidden (obsolete)
Comment 4 QA Administrators 2024-09-30 03:16:08 UTC Comment hidden (obsolete)
Comment 5 Regina Henschel 2024-09-30 10:23:36 UTC
The texture is still not plausible in Version: 25.2.0.0.alpha0+ (X86_64) / LibreOffice Community
Build ID: f7fbf6504fd6190187f6e4d092af880ba8c7bf6a
CPU threads: 32; OS: Windows 11 X86_64 (10.0 build 22631); UI render: Skia/Raster; VCL: win
Locale: de-DE (de_DE); UI: en-US
Calc: threaded