1.0Leonardo 2019/leonardo2019cuthemeedtr5/leonardo2019/author/cuthemeedtr5/rich600338<blockquote class="wp-embedded-content" data-secret="kqOHhvs1Tt"><a href="/leonardo2019/2019/da-vincis-vision/">da Vinci’s 3D Mastery Explored by 杏吧原创 President</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="/leonardo2019/2019/da-vincis-vision/embed/#?secret=kqOHhvs1Tt" width="600" height="338" title="“da Vinci’s 3D Mastery Explored by 杏吧原创 President” — Leonardo 2019" data-secret="kqOHhvs1Tt" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=/leonardo2019/wp-includes/js/wp-embed.min.js /* ]]> */ </script> /leonardo2019/wp-content/uploads/sites/217/ll.jpg500353When we look at a black-and-white image of several outlined circles with varying degrees and placement of shading inside their rings, some of the circles will look like bumps, while others will look like holes, despite the fact that they’re on a flat piece of paper. That’s because we assume that light comes from above […]