<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <!-- Generated by HsColour, http://www.cs.york.ac.uk/fp/darcs/hscolour/ --> <title>Graphics/Rendering/OpenGL/GL/EdgeFlag.hs</title> <link type='text/css' rel='stylesheet' href='hscolour.css' /> </head> <body> <pre><a name="line-1"></a><span class='hs-comment'>-- #hide</span> <a name="line-2"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-3"></a><span class='hs-comment'>-- |</span> <a name="line-4"></a><span class='hs-comment'>-- Module : Graphics.Rendering.OpenGL.GL.EdgeFlag</span> <a name="line-5"></a><span class='hs-comment'>-- Copyright : (c) Sven Panne 2002-2009</span> <a name="line-6"></a><span class='hs-comment'>-- License : BSD-style (see the file libraries/OpenGL/LICENSE)</span> <a name="line-7"></a><span class='hs-comment'>-- </span> <a name="line-8"></a><span class='hs-comment'>-- Maintainer : sven.panne@aedion.de</span> <a name="line-9"></a><span class='hs-comment'>-- Stability : stable</span> <a name="line-10"></a><span class='hs-comment'>-- Portability : portable</span> <a name="line-11"></a><span class='hs-comment'>--</span> <a name="line-12"></a><span class='hs-comment'>-- This is a purely internal module for (un-)marshaling EdgeFlag.</span> <a name="line-13"></a><span class='hs-comment'>--</span> <a name="line-14"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-15"></a> <a name="line-16"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>OpenGL</span><span class='hs-varop'>.</span><span class='hs-conid'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>EdgeFlag</span> <span class='hs-layout'>(</span> <a name="line-17"></a> <span class='hs-conid'>EdgeFlag</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>marshalEdgeFlag</span><span class='hs-layout'>,</span> <span class='hs-varid'>unmarshalEdgeFlag</span> <a name="line-18"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-19"></a> <a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>OpenGL</span><span class='hs-varop'>.</span><span class='hs-conid'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>BasicTypes</span> <span class='hs-layout'>(</span> <span class='hs-conid'>GLboolean</span> <span class='hs-layout'>)</span> <a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>OpenGL</span><span class='hs-varop'>.</span><span class='hs-conid'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>GLboolean</span> <span class='hs-layout'>(</span> <a name="line-22"></a> <span class='hs-varid'>marshalGLboolean</span><span class='hs-layout'>,</span> <span class='hs-varid'>unmarshalGLboolean</span> <span class='hs-layout'>)</span> <a name="line-23"></a> <a name="line-24"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-25"></a> <a name="line-26"></a><span class='hs-comment'>-- | A vertex can begin an edge which lies in the interior of its polygon or on</span> <a name="line-27"></a><span class='hs-comment'>-- the polygon\'s boundary.</span> <a name="line-28"></a> <a name="line-29"></a><a name="EdgeFlag"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>EdgeFlag</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BeginsInteriorEdge</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>BeginsBoundaryEdge</span> <a name="line-30"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ord</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span> <span class='hs-layout'>)</span> <a name="line-31"></a> <a name="line-32"></a><a name="marshalEdgeFlag"></a><span class='hs-definition'>marshalEdgeFlag</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>EdgeFlag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLboolean</span> <a name="line-33"></a><span class='hs-definition'>marshalEdgeFlag</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>marshalGLboolean</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-conid'>BeginsBoundaryEdge</span> <span class='hs-varop'>==</span><span class='hs-layout'>)</span> <a name="line-34"></a> <a name="line-35"></a><a name="unmarshalEdgeFlag"></a><span class='hs-definition'>unmarshalEdgeFlag</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLboolean</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EdgeFlag</span> <a name="line-36"></a><span class='hs-definition'>unmarshalEdgeFlag</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <a name="line-37"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>unmarshalGLboolean</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>BeginsBoundaryEdge</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>BeginsBoundaryEdge</span> </pre></body> </html>
