tristanbay Posted July 21, 2019 Share Posted July 21, 2019 The algorithms for some of the geometry tools seem to be slightly off when calculating where the finishing shapes should be. In the video, I placed a blue circle under the red one to show that the combined shapes to be divided before I do it don't match the combined shapes after I hit "Divide." geometry_tool_problem1.mp4 mondze 1 Quote Link to comment Share on other sites More sharing options...
Staff Gabe Posted July 26, 2019 Staff Share Posted July 26, 2019 Hi @tristanbay, Sorry for the delayed reply. This is not a bug. Those are not perfect geometric circles, but a curve with 4 bezier nodes. When dividing, it cannot be 100% accurate - You are zoomed in to 75000%, so this is expected. Thanks, Gabe. tristanbay 1 Quote Link to comment Share on other sites More sharing options...
R C-R Posted July 26, 2019 Share Posted July 26, 2019 3 hours ago, GabrielM said: This is not a bug. Those are not perfect geometric circles, but a curve with 4 bezier nodes. As I understand it, the developers hope to add ellipses/circles defined by their actual geometry (radii, I suppose) at some point, but there is no ETA for that. tristanbay 1 Quote All 3 1.10.8, & all 3 V2.4.1 Mac apps; 2020 iMac 27"; 3.8GHz i7, Radeon Pro 5700, 32GB RAM; macOS 10.15.7 Affinity Photo 1.10.8; Affinity Designer 1.108; & all 3 V2 apps for iPad; 6th Generation iPad 32 GB; Apple Pencil; iPadOS 15.7 Link to comment Share on other sites More sharing options...
tristanbay Posted July 26, 2019 Author Share Posted July 26, 2019 7 hours ago, GabrielM said: Hi @tristanbay, Sorry for the delayed reply. This is not a bug. Those are not perfect geometric circles, but a curve with 4 bezier nodes. When dividing, it cannot be 100% accurate - You are zoomed in to 75000%, so this is expected. Thanks, Gabe. This doesn't make complete sense, though, because a regular circle looks the exact same in AD as a circle that has just been converted to curves. If a circle can be perfectly translated to curves in AD, then why can't it do a shape division correctly? Does it make it that much more complex to calculate so it just approximates it? Btw, Inkscape seems to do the exact same thing except it's even less accurate (it's clearly visible at less than 10000% zoom I believe) Quote Link to comment Share on other sites More sharing options...
thomaso Posted July 26, 2019 Share Posted July 26, 2019 1 hour ago, tristanbay said: You are zoomed in to 75000% 1 hour ago, tristanbay said: a regular circle looks the exact same "This doesn't make complete sense" to talk about "look" concerning geometry + precision @ 75.000% zoom. Gabe 1 Quote macOS 10.14.6 | MacBookPro Retina 15" | Eizo 27" | Affinity V1 Link to comment Share on other sites More sharing options...
PixelPest Posted July 26, 2019 Share Posted July 26, 2019 It depends on the size. If you put it relatively on Din A1 the aberration will not this noticeable. Quote Link to comment Share on other sites More sharing options...
PixelPest Posted July 26, 2019 Share Posted July 26, 2019 1 hour ago, tristanbay said: Btw, Inkscape seems to do the exact same thing except it's even less accurate (it's clearly visible at less than 10000% zoom I believe) Inkscape has adjustable Numeric precision accessible. Quote Link to comment Share on other sites More sharing options...
R C-R Posted July 26, 2019 Share Posted July 26, 2019 1 hour ago, tristanbay said: This doesn't make complete sense, though, because a regular circle looks the exact same in AD as a circle that has just been converted to curves. But it is not a perfect circle to begin with, just a close approximation of one using Bezier curves. See for example is-it-possible-to-generate-a-circle-with-a-bezier-curve for much more about the math. Quote All 3 1.10.8, & all 3 V2.4.1 Mac apps; 2020 iMac 27"; 3.8GHz i7, Radeon Pro 5700, 32GB RAM; macOS 10.15.7 Affinity Photo 1.10.8; Affinity Designer 1.108; & all 3 V2 apps for iPad; 6th Generation iPad 32 GB; Apple Pencil; iPadOS 15.7 Link to comment Share on other sites More sharing options...
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