Bug report #17196

Rubber band is not correctly displayed when map is rotated

Added by Loïc BARTOLETTI about 6 years ago. Updated over 4 years ago.

Category:Map Canvas
Affected QGIS version:3.5(master) Regression?:No
Operating System: Easy fix?:No
Pull Request or Patch supplied:No Resolution:
Crashes QGIS or corrupts data:No Copied to github as #:25095


When you draw complex geometry (especially with Circular string), the rubber band is not correctly displayed when map is rotated and especially when the map have many objects or rasters.

What I mean by not correctly displayed is the presence of artefact or broken line/curve.

Tested with QGis 2.18 Windows and QGis 2.99 Debian

Sans titre.png (6.66 KB) Loïc BARTOLETTI, 2017-09-25 02:46 PM

circularringartefacts.png - Circular ring artefacts (30.5 KB) Richard Duivenvoorde, 2017-10-16 04:21 PM


#1 Updated by Richard Duivenvoorde almost 6 years ago

Confirmed here (wanted to create an issue and then found this one).
Current master Debian

To reproduce:
- create a new Memory Polygon layer
- choose 'Add Circular String' to add a new feature
- start with some points like in the screendump
- then move on the right side from right to left

You see the artefacts in my screendump. With the next repaint they are gone.

#2 Updated by Jürgen Fischer over 4 years ago

  • Status changed from Open to Feedback

Please test with QGIS 3.4 - QGIS 2.18 reached it's end of life.

#3 Updated by Loïc BARTOLETTI over 4 years ago

  • Affected QGIS version changed from 2.18.13 to 3.5(master)
  • Status changed from Feedback to Open

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