{"id":40209,"date":"2019-12-03T07:37:04","date_gmt":"2019-12-03T07:37:04","guid":{"rendered":"http:\/\/www.labri.fr\/perso\/barla\/blog\/?p=40209"},"modified":"2020-10-19T21:11:39","modified_gmt":"2020-10-19T21:11:39","slug":"motions-movements","status":"publish","type":"post","link":"https:\/\/www.labri.fr\/perso\/barla\/blog\/?p=40209","title":{"rendered":"Motions &#038; movements"},"content":{"rendered":"<p id=\"top\" \/>\n<h3 class=\"wp-block-heading\">Glittery flows<\/h3>\n\n\n\n<p>Glints off water are visually different from imaginary spotlights that  would be turned on and off in a rythmic pattern. Variations in the distribution of glints appearance and disappearance are mostly due to the motion of capillary waves. These induce motions of the locations where the sun gets reflected, but also variations in highlight spread due to the shape of waves! Peaks of intensity occur in sources and sinks of highlight motion, where  most of the reflected energy is focused.  <br>From up close, reflections of the full environment become visible, as  well as the sources and sinks of specular flow. The way flow emerges from sources, and is guided toward sinks, is indicative of the dynamic shape of the water surface. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Motion islands<\/h3>\n\n\n\n<p>Consider a distribution of &#8220;objects&#8221; distributed in space, with no discernible background between them. One example is a multitude of islands on a calm sea at dawn: the sea acts as a featureless background. <br>I came across this kind of view looking through a plane window on my way  to Finland (lots of small islands there). What makes us see the islands in depth, or even lying on a same plane in  space? <br>There might be a motion perspective cue at work here: something in the  pattern of motions that ties islands together. What about levitating objects? Would we able to pickup an object that does not lie on the same plane only from motion cues? <br> <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Glittery flows Glints off water are visually different from imaginary spotlights that would be turned on and off in a rythmic pattern. Variations in the distribution of glints appearance and disappearance are mostly due to the motion of capillary waves. These induce motions of the locations where the sun gets reflected, but also variations in &#8230; <a title=\"Motions &#038; movements\" class=\"read-more\" href=\"https:\/\/www.labri.fr\/perso\/barla\/blog\/?p=40209\" aria-label=\"Read more about Motions &#038; movements\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[772],"tags":[],"class_list":["post-40209","post","type-post","status-publish","format-standard","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/posts\/40209","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=40209"}],"version-history":[{"count":2,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/posts\/40209\/revisions"}],"predecessor-version":[{"id":40403,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/posts\/40209\/revisions\/40403"}],"wp:attachment":[{"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=40209"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=40209"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=40209"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}