Renatox Posted July 20, 2023 Share Posted July 20, 2023 A bizarre situation that I struggle some hours to find out to solve it! Using simple objects like 2 CIRCLES, when overlaid both and rotate only one of them to any angles (except 45º degrees) occurres a size distortion while both selecteds. But, selecting one by one the dimensions appears right. Quote Link to comment Share on other sites More sharing options...
GarryP Posted July 20, 2023 Share Posted July 20, 2023 Confirmed on Windows 10 with Designer 2.1.1 – see attached video. There’s a tiny difference and the difference changes depending on the rotation (and even disappears at some rotation values, e.g. 45). 2023-07-20 10-00-55.mp4 Quote Link to comment Share on other sites More sharing options...
Aammppaa Posted July 20, 2023 Share Posted July 20, 2023 Circles in Affinity are not true circles, but approximations of circles created from 4 Bezier curves. So at some rotations the 'circle' is wider / taller than at others. I suspect that this is what we are seeing here. Perhaps when only a single circle is selected Affinity is smart enough to know that it is supposed to be a true circle, and so lies about the true size? But when two objects are selected it can't lie about both! EDIT: Also I notice it doesn't seem to happen with other units (I tried mm). Renatox 1 Quote Win10 Home x64 | AMD Ryzen 7 2700X @ 3.7GHz | 48 GB RAM | 1TB SSD | nVidia GTX 1660 | Wacom Intuos Pro Link to comment Share on other sites More sharing options...
Dan C Posted July 20, 2023 Share Posted July 20, 2023 Thanks for your report @Renatox, I can confirm that I'm seeing the same behaviour here and this has been raised with our team previously, as Aammppaa mentions above this is due to Ellipses in Affinity being an approximation of 4 Bezier curves. This is logged with our developers to be improved in a future version, with the inclusion of 'true' circles. I hope this clears things up! 52 minutes ago, Aammppaa said: EDIT: Also I notice it doesn't seem to happen with other units (I tried mm). I'm seeing this occur with any unit - please ensure you have more than '1' set for the Decimal Place value under Settings > User Interface to see the size difference reported Quote Link to comment Share on other sites More sharing options...
NotMyFault Posted July 20, 2023 Share Posted July 20, 2023 Oldie but goodie Use a circle made of more that 4 nodes for greater accuracy Quote Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. My posts focus on technical aspects and leave out most of social grease like „maybe“, „in my opinion“, „I might be wrong“ etc. just add copy/paste all these softeners from this signature to make reading more comfortable for you. Otherwise I’m a fine person which respects you and everyone and wants to be respected. Link to comment Share on other sites More sharing options...
Renatox Posted July 21, 2023 Author Share Posted July 21, 2023 13 hours ago, NotMyFault said: Oldie but goodie Use a circle made of more that 4 nodes for greater accuracy doesn't work. the donut still in the same problem, and the circle contains double overlaid nodes. Quote Link to comment Share on other sites More sharing options...
Renatox Posted July 21, 2023 Author Share Posted July 21, 2023 14 hours ago, Dan C said: Thanks for your report @Renatox, I can confirm that I'm seeing the same behaviour here and this has been raised with our team previously, as Aammppaa mentions above this is due to Ellipses in Affinity being an approximation of 4 Bezier curves. This is logged with our developers to be improved in a future version, with the inclusion of 'true' circles. I hope this clears things up! I'm seeing this occur with any unit - please ensure you have more than '1' set for the Decimal Place value under Settings > User Interface to see the size difference reported I must consider this is a serious error. Ok, it just a small fraction of numbers, but when working with a technical / precision job or even big size graphics using several objects, it will increase this small numbers to a big inconsistent layout, with much more lack of alignment. Quote Link to comment Share on other sites More sharing options...
v_kyr Posted July 21, 2023 Share Posted July 21, 2023 Related informations about Bézier Curves & Circles ... A Primer on Bézier Curves Approximate a circle with cubic Bézier curves How to create a circle with Bézier curves? ... and so on ... Quote ☛ Affinity Designer 1.10.8 ◆ Affinity Photo 1.10.8 ◆ Affinity Publisher 1.10.8 ◆ OSX El Capitan ☛ Affinity V2.3 apps ◆ MacOS Sonoma 14.2 ◆ iPad OS 17.2 Link to comment Share on other sites More sharing options...
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