{"id":7048839,"date":"2026-08-27T04:57:34","date_gmt":"2026-08-27T04:57:34","guid":{"rendered":"https:\/\/peraltafinancing.com\/animation\/fluid-control-with-localized-spacetime-windows\/"},"modified":"2026-08-27T04:57:34","modified_gmt":"2026-08-27T04:57:34","slug":"fluid-control-with-localized-spacetime-windows","status":"publish","type":"post","link":"https:\/\/fivemor.com\/?p=7048839","title":{"rendered":"Fluid Control with Localized Spacetime Windows"},"content":{"rendered":"<p> <br \/>\n<\/p>\n<div id=\"post-4538\">\n<p>\t\t\t\t\t<!-- .entry-meta --><\/p>\n<div class=\"entry-content\">\n<p class=\"wp-block-paragraph\">Yixin Chen, David I.W. Levin, Timothy R. Langlois<\/p>\n<p class=\"wp-block-paragraph\">We present a physics-based fluid control method utilizing localized spacetime windows, extending force-based fluid control to substantially larger simulation scales. In many practical editing scenarios, user-specified objectives affect only a small region of an otherwise satisfactory simulation, resulting in optimal control force distributions that are highly sparse in both space and time. However, existing optimization-based fluid control methods typically solve for control forces over the entire spacetime domain, leading to unnecessarily high computational cost and poor scalability. Motivated by this observation, we restrict optimization to localized spacetime regions surrounding the edit of interest, significantly reducing the dimensionality of the control problem. Within this framework, control forces are parameterized on a coarse \u201cfloating\u201d background grid, decoupling control degrees of freedom from simulation resolution and promoting smooth, physically plausible forces. We further analyze spacetime-window selection as a joint spatial-temporal problem. While the full problem can be formulated as a 2D search over spatial and temporal window extents, practical workflows can often leverage user-specified spatial regions and lightweight temporal-window selection strategies to reduce search cost. Our method enables a range of intuitive editing tasks, where sparse user inputs can induce coherent motion in surrounding fluid structures. We demonstrate the effectiveness and efficiency of our method with various 2D and 3D particle-based free-surface simulation examples.<\/p>\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/chenyixin1008.github.io\/\">Fluid Control with Localized Spacetime Windows<\/a><\/p>\n<\/p><\/div>\n<p><!-- .entry-content --><\/p>\n<div class=\"entry-utility\">\n\t\t\t\t\t\t\tThis entry was posted in <a href=\"https:\/\/www.physicsbasedanimation.com\/category\/uncategorized\/\" rel=\"category tag\">Uncategorized<\/a>. Bookmark the <a href=\"https:\/\/www.physicsbasedanimation.com\/2026\/07\/09\/fluid-control-with-localized-spacetime-windows\/\" title=\"Permalink to Fluid Control with Localized Spacetime Windows\" rel=\"bookmark\">permalink<\/a>.\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n<p><!-- .entry-utility -->\n\t\t\t\t\t<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>Yixin Chen, David I.W. Levin, Timothy R. Langlois We present a physics-based fluid control method utilizing localized spacetime windows, extending force-based fluid control to substantially larger simulation scales. In many practical editing scenarios, user-specified objectives affect only a small region of an otherwise satisfactory simulation, resulting in optimal control force distributions that are highly sparse [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":354832,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12035],"tags":[2408,3081,58221,18275,28188],"dealstore":[],"offerexpiration":[],"class_list":["post-7048839","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-animation","tag-control","tag-fluid","tag-localized","tag-spacetime","tag-windows"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Fluid Control with Localized Spacetime Windows - Som2ny Network<\/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:\/\/fivemor.com\/?p=7048839\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fluid Control with Localized Spacetime Windows - Som2ny Network\" \/>\n<meta property=\"og:description\" content=\"Yixin Chen, David I.W. Levin, Timothy R. Langlois We present a physics-based fluid control method utilizing localized spacetime windows, extending force-based fluid control to substantially larger simulation scales. 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