<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> On 5/5/2021 11:54 AM, Hilaire Fernandes via Cuis-dev wrote: <blockquote cite="mid:c89c4434-e5ac-f51c-bbbc-2262e98c0245@drgeo.eu" type="cite"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> The rendering quality is great. So far, the geometric objects, adjust perfectly. For example, point perfectly on the middle of the line: <img moz-do-not-send="false" src="cid:part1.02050109.04080802@jvuletich.org" alt="arc" height="484" width="398"> <pre class="moz-signature" cols="72">-- GNU Dr. Geo <a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://drgeo.eu">http://drgeo.eu</a> <a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://blog.drgeo.eu">http://blog.drgeo.eu</a></pre> </blockquote> Nice! Note that if you move your point by as little as one tenth of a pixel (float coordinates), there will be a visual effect of 0.1 pixels, and both will still match correctly. 0.1 pixel is hard to see for me, but this script shows that 1/4 of a pixel is pefectly visible (at least on my display and with my eyes): (VectorEngineSubPixel onForm: Display) strokeWidth: 1.0 color: Color white do: [ :engine | engine basicMoveToX: 100 y: 100; basicLineToX: 100 y: 150; basicMoveToX: 100.25 y: 150; basicLineToX: 100.25 y: 200; basicMoveToX: 100 y: 200; basicLineToX: 100 y: 250 ]. Display forceToScreen Cheers, <pre class="moz-signature" cols="72">-- Juan Vuletich <a class="moz-txt-link-abbreviated" href="http://www.cuis-smalltalk.org">www.cuis-smalltalk.org</a> <a class="moz-txt-link-freetext" href="https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev">https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev</a> <a class="moz-txt-link-freetext" href="https://github.com/jvuletich">https://github.com/jvuletich</a> <a class="moz-txt-link-freetext" href="https://www.linkedin.com/in/juan-vuletich-75611b3">https://www.linkedin.com/in/juan-vuletich-75611b3</a> @JuanVuletich</pre> </body> </html>