NotMyFault Posted September 29, 2021 Share Posted September 29, 2021 (edited) Hi, there are several complaints about circle made from ellipse not being perfect, meaning the radius will differ slightly depending on rotation angle. Most obvious if you look at 45° angle. For reference, one of the latest bug reports: https://forum.affinity.serif.com/index.php?/topic/148430-power-duplicate-around-circle-not-precise-what-am-i-missing/&tab=comments#comment-840218 This could easily solved by adding one additional shape: a circle, made of 12 nodes instead of only 4. The "real" circle will be almost rotation invariant. Almost means that in all tests using up to 256.000^2 pixel canvas size the deviation of radius while rotating this circle was smaller than 1 pixel. The regular ellipse based circle causes a deviation of up to 12,7px at 65536 px canvas, or 1/5000 or 0,2 *10^-3 Edited September 30, 2021 by NotMyFault telemax, CreativeTim, ronnyb and 1 other 4 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. Link to comment Share on other sites More sharing options...
walt.farrell Posted October 24, 2021 Share Posted October 24, 2021 I don't see a question in your post, but this would make a good Feature Request. Seems like an elegant solution that might involve a lot less work than revising the math of the ellipse tool. NotMyFault and ronnyb 2 Quote -- Walt Designer, Photo, and Publisher V1 and V2 at latest retail and beta releases PC: Desktop: Windows 11 Pro, version 23H2, 64GB memory, AMD Ryzen 9 5900 12-Core @ 3.00 GHz, NVIDIA GeForce RTX 3090 Laptop: Windows 11 Pro, version 23H2, 32GB memory, Intel Core i7-10750H @ 2.60GHz, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU. iPad: iPad Pro M1, 12.9": iPadOS 17.4.1, Apple Pencil 2, Magic Keyboard Mac: 2023 M2 MacBook Air 15", 16GB memory, macOS Sonoma 14.4.1 Link to comment Share on other sites More sharing options...
NotMyFault Posted October 24, 2021 Author Share Posted October 24, 2021 Yeah, the ellipse tool can stay with its imperfections - it is intentionally not called a circle tool. Simply adding a new circle tools (based on 12 instead of 4 nodes) will solve the problem several users raised. killzen, PaulEC and Old Bruce 3 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. Link to comment Share on other sites More sharing options...
telemax Posted February 17, 2022 Share Posted February 17, 2022 I was able to get fairly accurate results with the Cloud tool, with 12 Bubbles. I checked the result with a star with 12 beams as @NotMyFault advised, as well as with 24 beams, and got a good result. Circle.afdesign Circle_1.mp4 Circle_2.mp4 NotMyFault, CreativeTim and lacerto 3 Quote Non-destructive Mask https://forum.affinity.serif.com/index.php?/topic/150439-non-destructive-mask/Image layer & Pixel layer https://forum.affinity.serif.com/index.php?/topic/146720-image-layer-and-pixel-layer/Brushes | Stars https://forum.affinity.serif.com/index.php?/topic/135202-brushes-stars/ Link to comment Share on other sites More sharing options...
ronnyb Posted February 9 Share Posted February 9 On 10/24/2021 at 6:41 PM, NotMyFault said: Yeah, the ellipse tool can stay with its imperfections - it is intentionally not called a circle tool. Simply adding a new circle tools (based on 12 instead of 4 nodes) will solve the problem several users raised. I just tried this with the largest possible canvas size I could get to fit on my 32" display ( 565+ yards in both horizontal and vertical dimensions) using the cloud tool with only 4 bubbles, and it still maintained perfect accuracy at that scale.... Blue is the radius, red is the Oval tool's "circle," and green is the Cloud tool with 4 bubbles. Quote 2021 16” Macbook Pro w/ M1 Max 10c cpu /24c gpu, 32 GB RAM, 1TB SSD, Sonoma 14.4.1 2018 11" iPad Pro w/ A12X cpu/gpu, 256 GB, iPadOS 17 Link to comment Share on other sites More sharing options...
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