{"id":4731,"date":"2024-10-11T16:21:07","date_gmt":"2024-10-11T15:21:07","guid":{"rendered":"http:\/\/lfs.coop\/en\/?post_type=portfolio_page&#038;p=4731"},"modified":"2024-10-11T16:21:50","modified_gmt":"2024-10-11T15:21:50","slug":"gp-triangulation","status":"publish","type":"portfolio_page","link":"https:\/\/lfs.coop\/en\/projects\/gp-triangulation\/","title":{"rendered":"GP Triangulation"},"content":{"rendered":"\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-89c98654 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.67%\">\n<p><strong>GP Triangulation is a suite of algorithms we developed to convert a 2D drawing into a 3D shape. This allows us to combine the ease and speed of 2D drawing with the more complex and realistic rendering of 3D.<\/strong><\/p>\n<p>To illustrate,\u00a0 we can transform these drawings on the left around the character, known as <em>smears<\/em>, into felt-like models on the right.<\/p>\n<blockquote><p><em>Smears<\/em> are a traditional animation technique used to compensate for the limited number of animated frames by drawing streaks or duplicating parts that are moving rapidly on screen. It&#8217;s a stylistic effect that compensates for the absence of motion blur naturally present in live-action filming.<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<div class=\"flourish-embed flourish-photo-slider\" data-src=\"visualisation\/15920317\"><script src=\"https:\/\/public.flourish.studio\/resources\/embed.js\"><\/script><\/div>\n<p>The drawings are then transformed into 3D models, allowing them to receive materials and lighting that match the scene\u2019s requirements. 2D smears are much faster to produce than equivalent 3D models.<\/p>\n<p><strong>The main challenge is transforming a drawing, which can be made up of several elements<\/strong> (several filled shapes, closed or not, or simple lines) <strong>and turning it into a clean 3D model. Without these complex assembly techniques, the resulting 3D model would look rough. As a result, it would be difficult or impossible to render beautifully.<\/strong><\/p>\n<p>In this other test, we increased the difficulty with a fully animated sequence with many drawings. The method, which we have refined, is then applied to achieve a cut-out paper effect.<\/p>\n<p style=\"text-align: center;\"><strong>The original 2D sequence<\/strong><\/p>\n<p style=\"text-align: center;\">\n\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-vimeo wp-block-embed-vimeo wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Paper-pig_grease-pencil\" src=\"https:\/\/player.vimeo.com\/video\/878312993?h=1b3d46afa5&amp;dnt=1&amp;app_id=122963\" width=\"500\" height=\"281\" frameborder=\"0\" allow=\"autoplay; fullscreen; picture-in-picture; clipboard-write; encrypted-media; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><strong>The 3D rendering obtained from the 2D materials<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\">\n\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-vimeo wp-block-embed-vimeo wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"PaperPig_test_3D\" src=\"https:\/\/player.vimeo.com\/video\/878312980?h=94d970de3e&amp;dnt=1&amp;app_id=122963\" width=\"500\" height=\"281\" frameborder=\"0\" allow=\"autoplay; fullscreen; picture-in-picture; clipboard-write; encrypted-media; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><strong>You can compare the before\/after results here, even though this work is still in progress and hasn&#8217;t undergone any compositing treatment to further improve its rendering.<\/strong><\/p>\n<div class=\"flourish-embed flourish-photo-slider\" data-src=\"visualisation\/15506751\"><script src=\"https:\/\/public.flourish.studio\/resources\/embed.js\"><\/script><\/div>\n<div data-src=\"visualisation\/15506751\"><\/div>\n<div data-src=\"visualisation\/15506751\">\n<p>This page explains the overall concept, which is broken down into several resources and tool :<\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li>The basics are described in <a href=\"https:\/\/lacuisine.tech\/fr\/triangulation-3d-dun-trace-grease-pencil\/\" target=\"_new\" rel=\"noopener\">an article on our blog<\/a>.<\/li>\n<li>A <a href=\"https:\/\/lacuisine.tech\/grease-pencil-tools-for-animation-productions\/\" target=\"_new\" rel=\"noopener\">presentation at the Blender Conference 2022<\/a> explaining part of the GP Powertools solutions showcases the work from 2022.<\/li>\n<li>The current state was made public during the <a href=\"https:\/\/lacuisine.tech\/fr\/des-scenes-grease-pencil-pour-la-rd\/\" target=\"_new\" rel=\"noopener\">Blender Conference 2023<\/a>.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<\/div>\n\n\n\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-89c98654 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:16.67%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:83.33%\">\n<hr \/>\n<p><strong>Some links related to this tool<\/strong><strong>:<\/strong><\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"http:\/\/lacuisine.tech\"><strong>lacuisine.tech<\/strong><\/a>\u00a0&#8211; Find all the articles from our R&amp;D team<\/li>\n<li><strong><a href=\"https:\/\/gitlab.com\/lfs.coop\/blender\/gp-triangulation\">The tool is available on GitLab<\/a><\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<hr \/>\n<p><strong>This tool has been used on<\/strong><strong>:\u00a0<\/strong><\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong><a href=\"\/en\/projects\/tricotown\/\">Trictotown\u00a0<\/a><\/strong><\/li>\n<li><strong><a href=\"\/en\/projects\/paper-pig\/\">Paper Pig<\/a>, OpenScene\u00a0<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<p style=\"text-align: center;\">This research is part of a project supported by the CNC.<\/p>\n<p style=\"text-align: center;\"><strong><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-5490\" src=\"https:\/\/les-fees-speciales.coop\/wp-content\/uploads\/2023\/10\/matrice-logo-3-300x91.png\" alt=\"\" width=\"151\" height=\"46\" \/><\/strong><\/p>\n<hr \/>\n\n\n\n<\/div>\n\n\n<\/div>\n\n\n<\/div>\n\n\n<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>GP Triangulation is a suite of algorithms we developed to convert a 2D drawing into a 3D shape. This allows us to combine the ease and speed of 2D drawing with the more complex and realistic rendering of 3D. To illustrate,\u00a0 we can transform these drawings on the left around the character, known as smears, [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":4718,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_lfs_hide_title":false},"portfolio_category":[56,57,59],"portfolio_tag":[],"class_list":["post-4731","portfolio_page","type-portfolio_page","status-publish","has-post-thumbnail","hentry","portfolio_category-blender","portfolio_category-dev","portfolio_category-grease-pencil"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>GP Triangulation - Les F\u00e9es Sp\u00e9ciales<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lfs.coop\/en\/projects\/gp-triangulation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"GP Triangulation - Les F\u00e9es Sp\u00e9ciales\" \/>\n<meta property=\"og:description\" content=\"GP Triangulation is a suite of algorithms we developed to convert a 2D drawing into a 3D shape. 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