{"id":637,"date":"2009-07-25T12:17:19","date_gmt":"2009-07-25T02:17:19","guid":{"rendered":"http:\/\/www.vectorstorm.org\/?p=637"},"modified":"2009-07-25T16:10:03","modified_gmt":"2009-07-25T06:10:03","slug":"archimedes","status":"publish","type":"post","link":"https:\/\/www.vectorstorm.com.au\/2009\/07\/25\/archimedes\/","title":{"rendered":"Archimedes"},"content":{"rendered":"<p>With a lever and a place to stand, Archimedes could move the world.  One wonders whether he, too, was trying to avoid z-buffer imprecision.<\/p>\n<p>In a world that&#8217;s 20 kilometers on a side, OpenGL really doesn&#8217;t like looking at things which are very far from the middle; \u00a0all sorts of little glitches pop up as you move away from zero, mostly to do with penetrating objects, such as where water meets the land. \u00a0So I&#8217;m now moving the whole world around as the camera moves, to keep the camera and everything nearby within a few hundred meters of zero. \u00a0Oddly, the most difficult bit to make work with all this were the clouds and the water ripples.<\/p>\n<p>I guess that water and water vapour don&#8217;t respond very well to the application of a lever.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>With a lever and a place to stand, Archimedes could move the world. One wonders whether he, too, was trying to avoid z-buffer imprecision. In a world that&#8217;s 20 kilometers on a side, OpenGL really doesn&#8217;t like looking at things which are very far from the middle; \u00a0all sorts of little glitches pop up as&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[24,25],"tags":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/po9WK-ah","_links":{"self":[{"href":"https:\/\/www.vectorstorm.com.au\/wp-json\/wp\/v2\/posts\/637"}],"collection":[{"href":"https:\/\/www.vectorstorm.com.au\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vectorstorm.com.au\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vectorstorm.com.au\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vectorstorm.com.au\/wp-json\/wp\/v2\/comments?post=637"}],"version-history":[{"count":0,"href":"https:\/\/www.vectorstorm.com.au\/wp-json\/wp\/v2\/posts\/637\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vectorstorm.com.au\/wp-json\/wp\/v2\/media?parent=637"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vectorstorm.com.au\/wp-json\/wp\/v2\/categories?post=637"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vectorstorm.com.au\/wp-json\/wp\/v2\/tags?post=637"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}