<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Graphics.UI.GLUT.Overlay</title><link href="ocean.css" rel="stylesheet" type="text/css" title="Ocean" /><script src="haddock-util.js" type="text/javascript"></script><script type="text/javascript">//<![CDATA[ window.onload = function () {pageLoad();}; //]]> </script></head><body id="mini"><div id="module-header"><p class="caption">Graphics.UI.GLUT.Overlay</p></div><div id="interface"><h1>Overlay creation and destruction </h1><div class="top"><p class="src"><a href="Graphics-UI-GLUT-Overlay.html#v:hasOverlay" target="main">hasOverlay</a></p></div><div class="top"><p class="src"><a href="Graphics-UI-GLUT-Overlay.html#v:overlayPossible" target="main">overlayPossible</a></p></div><h1>Showing and hiding an overlay </h1><div class="top"><p class="src"><a href="Graphics-UI-GLUT-Overlay.html#v:overlayVisible" target="main">overlayVisible</a></p></div><h1>Changing the <em>layer in use</em> </h1><div class="top"><p class="src"><span class="keyword">data</span> <a href="Graphics-UI-GLUT-Overlay.html#t:Layer" target="main">Layer</a> </p></div><div class="top"><p class="src"><a href="Graphics-UI-GLUT-Overlay.html#v:layerInUse" target="main">layerInUse</a></p></div><h1>Re-displaying </h1><div class="top"><p class="src"><a href="Graphics-UI-GLUT-Overlay.html#v:postOverlayRedisplay" target="main">postOverlayRedisplay</a></p></div></div></body></html>