{"id":5,"date":"2008-06-10T00:18:03","date_gmt":"2008-06-10T07:18:03","guid":{"rendered":"http:\/\/www.kevinbeason.com\/worklog\/?p=5"},"modified":"2008-06-10T13:36:38","modified_gmt":"2008-06-10T20:36:38","slug":"julia-fractal","status":"publish","type":"post","link":"https:\/\/www.kevinbeason.com\/worklog\/2008\/06\/10\/julia-fractal\/","title":{"rendered":"Julia fractal"},"content":{"rendered":"<p><a href=\"http:\/\/www.kevinbeason.com\/worklog\/wp-content\/uploads\/2008\/06\/glossy1024.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-6\" src=\"http:\/\/www.kevinbeason.com\/worklog\/wp-content\/uploads\/2008\/06\/glossy1024-300x300.jpg\" alt=\"\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.kevinbeason.com\/worklog\/wp-content\/uploads\/2008\/06\/glossy1024-300x300.jpg 300w, https:\/\/www.kevinbeason.com\/worklog\/wp-content\/uploads\/2008\/06\/glossy1024-150x150.jpg 150w, https:\/\/www.kevinbeason.com\/worklog\/wp-content\/uploads\/2008\/06\/glossy1024.jpg 1024w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Backdate: 3\/20\/2008<\/p>\n<p>Fixed quaterion julia intersector. Turns out all I needed to fix the precision problems I was having was to put a cap on the maximum distance the <a href=\"http:\/\/graphics.cs.uiuc.edu\/~jch\/papers\/rtqjs.pdf\">sphere tracing<\/a> could advance. Estimates far from the intersection were prone to overflow and accuracy issues, so adding a maximum stepsize fixed this. I also added a rudimentary glossy reflection (the phong one in S12.2.3 of Shirley&#8217;s RRT 2nd ed.), a class of reflection long overdue for me. This image was path traced with <strike>monochromatic<\/strike> emissive sky and ground. Don&#8217;t have rendering time handy but it was a number of hours on a quad core Q6600 for the 2048&#215;2048 original.<\/p>\n<p>This was from 3 months ago, hence the &#8220;backdate&#8221;.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Backdate: 3\/20\/2008 Fixed quaterion julia intersector. Turns out all I needed to fix the precision problems I was having was to put a cap on the maximum distance the sphere tracing could advance. Estimates far from the intersection were prone to overflow and accuracy issues, so adding a maximum stepsize fixed this. I also added [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5","post","type-post","status-publish","format-standard","hentry","category-general"],"_links":{"self":[{"href":"https:\/\/www.kevinbeason.com\/worklog\/wp-json\/wp\/v2\/posts\/5","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kevinbeason.com\/worklog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kevinbeason.com\/worklog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kevinbeason.com\/worklog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kevinbeason.com\/worklog\/wp-json\/wp\/v2\/comments?post=5"}],"version-history":[{"count":0,"href":"https:\/\/www.kevinbeason.com\/worklog\/wp-json\/wp\/v2\/posts\/5\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.kevinbeason.com\/worklog\/wp-json\/wp\/v2\/media?parent=5"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kevinbeason.com\/worklog\/wp-json\/wp\/v2\/categories?post=5"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kevinbeason.com\/worklog\/wp-json\/wp\/v2\/tags?post=5"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}