<?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/GLU/NURBS.hs</title> <link type='text/css' rel='stylesheet' href='hscolour.css' /> </head> <body> <pre><a name="line-1"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-2"></a><span class='hs-comment'>-- |</span> <a name="line-3"></a><span class='hs-comment'>-- Module : Graphics.Rendering.OpenGL.GLU.NURBS</span> <a name="line-4"></a><span class='hs-comment'>-- Copyright : (c) Sven Panne 2002-2009</span> <a name="line-5"></a><span class='hs-comment'>-- License : BSD-style (see the file libraries/OpenGL/LICENSE)</span> <a name="line-6"></a><span class='hs-comment'>-- </span> <a name="line-7"></a><span class='hs-comment'>-- Maintainer : sven.panne@aedion.de</span> <a name="line-8"></a><span class='hs-comment'>-- Stability : stable</span> <a name="line-9"></a><span class='hs-comment'>-- Portability : portable</span> <a name="line-10"></a><span class='hs-comment'>--</span> <a name="line-11"></a><span class='hs-comment'>-- This module corresponds to chapter 7 (NURBS) of the GLU specs.</span> <a name="line-12"></a><span class='hs-comment'>--</span> <a name="line-13"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-14"></a> <a name="line-15"></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'>GLU</span><span class='hs-varop'>.</span><span class='hs-conid'>NURBS</span> <span class='hs-layout'>(</span> <a name="line-16"></a> <span class='hs-conid'>NURBSObj</span><span class='hs-layout'>,</span> <span class='hs-varid'>withNURBSObj</span><span class='hs-layout'>,</span> <a name="line-17"></a> <span class='hs-conid'>NURBSBeginCallback</span><span class='hs-layout'>,</span> <span class='hs-varid'>withNURBSBeginCallback</span><span class='hs-layout'>,</span> <a name="line-18"></a> <span class='hs-conid'>NURBSVertexCallback</span><span class='hs-layout'>,</span> <span class='hs-varid'>withNURBSVertexCallback</span><span class='hs-layout'>,</span> <a name="line-19"></a> <span class='hs-conid'>NURBSNormalCallback</span><span class='hs-layout'>,</span> <span class='hs-varid'>withNURBSNormalCallback</span><span class='hs-layout'>,</span> <a name="line-20"></a> <span class='hs-conid'>NURBSColorCallback</span><span class='hs-layout'>,</span> <span class='hs-varid'>withNURBSColorCallback</span><span class='hs-layout'>,</span> <a name="line-21"></a> <span class='hs-conid'>NURBSEndCallback</span><span class='hs-layout'>,</span> <span class='hs-varid'>withNURBSEndCallback</span><span class='hs-layout'>,</span> <a name="line-22"></a> <span class='hs-varid'>checkForNURBSError</span><span class='hs-layout'>,</span> <a name="line-23"></a> <span class='hs-varid'>nurbsBeginEndCurve</span><span class='hs-layout'>,</span> <span class='hs-varid'>nurbsCurve</span><span class='hs-layout'>,</span> <a name="line-24"></a> <span class='hs-varid'>nurbsBeginEndSurface</span><span class='hs-layout'>,</span> <span class='hs-varid'>nurbsSurface</span><span class='hs-layout'>,</span> <a name="line-25"></a> <span class='hs-conid'>TrimmingPoint</span><span class='hs-layout'>,</span> <span class='hs-varid'>nurbsBeginEndTrim</span><span class='hs-layout'>,</span> <span class='hs-varid'>pwlCurve</span><span class='hs-layout'>,</span> <span class='hs-varid'>trimmingCurve</span><span class='hs-layout'>,</span> <a name="line-26"></a> <span class='hs-conid'>NURBSMode</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'>setNURBSMode</span><span class='hs-layout'>,</span> <a name="line-27"></a> <span class='hs-varid'>setNURBSCulling</span><span class='hs-layout'>,</span> <a name="line-28"></a> <span class='hs-conid'>SamplingMethod</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'>setSamplingMethod</span><span class='hs-layout'>,</span> <a name="line-29"></a> <span class='hs-varid'>loadSamplingMatrices</span><span class='hs-layout'>,</span> <a name="line-30"></a> <span class='hs-conid'>DisplayMode'</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'>setDisplayMode'</span> <a name="line-31"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-32"></a> <a name="line-33"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span> <span class='hs-varid'>unless</span> <span class='hs-layout'>)</span> <a name="line-34"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Marshal</span><span class='hs-varop'>.</span><span class='hs-conid'>Array</span> <span class='hs-layout'>(</span> <span class='hs-varid'>withArray</span> <span class='hs-layout'>)</span> <a name="line-35"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Ptr</span><span class='hs-layout'>,</span> <span class='hs-varid'>nullPtr</span><span class='hs-layout'>,</span> <span class='hs-varid'>castPtr</span><span class='hs-layout'>,</span> <span class='hs-conid'>FunPtr</span><span class='hs-layout'>,</span> <span class='hs-varid'>freeHaskellFunPtr</span> <span class='hs-layout'>)</span> <a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Storable</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Storable</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <a name="line-37"></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> <a name="line-38"></a> <span class='hs-conid'>GLenum</span><span class='hs-layout'>,</span> <span class='hs-conid'>GLint</span><span class='hs-layout'>,</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>,</span> <span class='hs-conid'>Capability</span> <span class='hs-layout'>)</span> <a name="line-39"></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'>Capability</span> <span class='hs-layout'>(</span> <span class='hs-varid'>marshalCapability</span> <span class='hs-layout'>)</span> <a name="line-40"></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'>ControlPoint</span> <a name="line-41"></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'>CoordTrans</span> <span class='hs-layout'>(</span> <a name="line-42"></a> <span class='hs-conid'>Position</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Size</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>MatrixOrder</span><span class='hs-layout'>(</span><span class='hs-conid'>ColumnMajor</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>MatrixComponent</span><span class='hs-layout'>,</span> <span class='hs-conid'>Matrix</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <a name="line-43"></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'>Exception</span> <span class='hs-layout'>(</span> <span class='hs-varid'>bracket</span><span class='hs-layout'>,</span> <span class='hs-varid'>bracket_</span> <span class='hs-layout'>)</span> <a name="line-44"></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> <span class='hs-varid'>marshalGLboolean</span> <span class='hs-layout'>)</span> <a name="line-45"></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'>PrimitiveMode</span> <span class='hs-layout'>(</span> <span class='hs-varid'>unmarshalPrimitiveMode</span> <span class='hs-layout'>)</span> <a name="line-46"></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'>BeginEnd</span> <span class='hs-layout'>(</span> <span class='hs-conid'>PrimitiveMode</span> <span class='hs-layout'>)</span> <a name="line-47"></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'>VertexSpec</span> <span class='hs-layout'>(</span> <a name="line-48"></a> <span class='hs-conid'>Vertex2</span><span class='hs-layout'>,</span> <span class='hs-conid'>Vertex3</span><span class='hs-layout'>,</span> <span class='hs-conid'>Normal3</span><span class='hs-layout'>,</span> <span class='hs-conid'>Color4</span> <span class='hs-layout'>)</span> <a name="line-49"></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'>GLU</span><span class='hs-varop'>.</span><span class='hs-conid'>ErrorsInternal</span> <span class='hs-layout'>(</span> <a name="line-50"></a> <span class='hs-varid'>recordErrorCode</span><span class='hs-layout'>,</span> <span class='hs-varid'>recordOutOfMemory</span> <span class='hs-layout'>)</span> <a name="line-51"></a> <a name="line-52"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-53"></a> <a name="line-54"></a><a name="NURBSCallback"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>NURBSCallback</span> <span class='hs-keyglyph'>=</span> <a name="line-55"></a> <span class='hs-conid'>Error</span> <a name="line-56"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Begin</span> <a name="line-57"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Vertex</span> <a name="line-58"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Normal</span> <a name="line-59"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Color</span> <a name="line-60"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>TextureCoord</span> <a name="line-61"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>End</span> <a name="line-62"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>BeginData</span> <a name="line-63"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>VertexData</span> <a name="line-64"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>NormalData</span> <a name="line-65"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ColorData</span> <a name="line-66"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>TextureCoordData</span> <a name="line-67"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>EndData</span> <a name="line-68"></a> <a name="line-69"></a><a name="marshalNURBSCallback"></a><span class='hs-definition'>marshalNURBSCallback</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSCallback</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <a name="line-70"></a><span class='hs-definition'>marshalNURBSCallback</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span> <a name="line-71"></a> <span class='hs-conid'>Error</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100103</span> <a name="line-72"></a> <span class='hs-conid'>Begin</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100164</span> <a name="line-73"></a> <span class='hs-conid'>Vertex</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100165</span> <a name="line-74"></a> <span class='hs-conid'>Normal</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100166</span> <a name="line-75"></a> <span class='hs-conid'>Color</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100167</span> <a name="line-76"></a> <span class='hs-conid'>TextureCoord</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100168</span> <a name="line-77"></a> <span class='hs-conid'>End</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100169</span> <a name="line-78"></a> <span class='hs-conid'>BeginData</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100170</span> <a name="line-79"></a> <span class='hs-conid'>VertexData</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100171</span> <a name="line-80"></a> <span class='hs-conid'>NormalData</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100172</span> <a name="line-81"></a> <span class='hs-conid'>ColorData</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100173</span> <a name="line-82"></a> <span class='hs-conid'>TextureCoordData</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100174</span> <a name="line-83"></a> <span class='hs-conid'>EndData</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100175</span> <a name="line-84"></a> <a name="line-85"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-86"></a><span class='hs-comment'>-- chapter 7.1: The NURBS Object</span> <a name="line-87"></a> <a name="line-88"></a><a name="NURBSObj"></a><span class='hs-comment'>-- an opaque pointer to a NURBS object</span> <a name="line-89"></a><a name="NURBSObj"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>NURBSObj</span><span class='hs-layout'>)</span> <a name="line-90"></a> <a name="line-91"></a><a name="isNullNURBSObj"></a><span class='hs-definition'>isNullNURBSObj</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <a name="line-92"></a><span class='hs-definition'>isNullNURBSObj</span> <span class='hs-layout'>(</span><span class='hs-conid'>NURBSObj</span> <span class='hs-varid'>ptr</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ptr</span> <span class='hs-varop'>==</span> <span class='hs-varid'>nullPtr</span> <a name="line-93"></a> <a name="line-94"></a><a name="withNURBSObj"></a><span class='hs-definition'>withNURBSObj</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <a name="line-95"></a><span class='hs-definition'>withNURBSObj</span> <span class='hs-varid'>failureValue</span> <span class='hs-varid'>action</span> <span class='hs-keyglyph'>=</span> <a name="line-96"></a> <span class='hs-varid'>bracket</span> <span class='hs-varid'>gluNewNurbsRenderer</span> <span class='hs-varid'>safeDeleteNurbsRenderer</span> <a name="line-97"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>nurbsObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>if</span> <span class='hs-varid'>isNullNURBSObj</span> <span class='hs-varid'>nurbsObj</span> <a name="line-98"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>recordOutOfMemory</span> <a name="line-99"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>failureValue</span> <a name="line-100"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>action</span> <span class='hs-varid'>nurbsObj</span><span class='hs-layout'>)</span> <a name="line-101"></a> <a name="line-102"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluNewNurbsRenderer"</span> <a name="line-103"></a> <span class='hs-varid'>gluNewNurbsRenderer</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>NURBSObj</span> <a name="line-104"></a> <a name="line-105"></a><a name="safeDeleteNurbsRenderer"></a><span class='hs-definition'>safeDeleteNurbsRenderer</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-106"></a><span class='hs-definition'>safeDeleteNurbsRenderer</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-keyglyph'>=</span> <a name="line-107"></a> <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-varid'>isNullNURBSObj</span> <span class='hs-varid'>nurbsObj</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>gluDeleteNurbsRenderer</span> <span class='hs-varid'>nurbsObj</span> <a name="line-108"></a> <a name="line-109"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluDeleteNurbsRenderer"</span> <a name="line-110"></a> <span class='hs-varid'>gluDeleteNurbsRenderer</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-111"></a> <a name="line-112"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-113"></a><span class='hs-comment'>-- chapter 7.2: Callbacks (begin)</span> <a name="line-114"></a> <a name="line-115"></a><a name="NURBSBeginCallback"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>NURBSBeginCallback</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PrimitiveMode</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-116"></a> <a name="line-117"></a><a name="BeginCallback'"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>BeginCallback'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-118"></a> <a name="line-119"></a><a name="withNURBSBeginCallback"></a><span class='hs-definition'>withNURBSBeginCallback</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NURBSBeginCallback</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <a name="line-120"></a><span class='hs-definition'>withNURBSBeginCallback</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>beginCallback</span> <span class='hs-varid'>action</span> <span class='hs-keyglyph'>=</span> <a name="line-121"></a> <span class='hs-varid'>bracket</span> <span class='hs-layout'>(</span><span class='hs-varid'>makeBeginCallback</span> <span class='hs-layout'>(</span><span class='hs-varid'>beginCallback</span> <span class='hs-varop'>.</span> <span class='hs-varid'>unmarshalPrimitiveMode</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-122"></a> <span class='hs-varid'>freeHaskellFunPtr</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>callbackPtr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-123"></a> <span class='hs-varid'>setBeginCallback</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-layout'>(</span><span class='hs-varid'>marshalNURBSCallback</span> <span class='hs-conid'>Begin</span><span class='hs-layout'>)</span> <span class='hs-varid'>callbackPtr</span> <a name="line-124"></a> <span class='hs-varid'>action</span> <a name="line-125"></a> <a name="line-126"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-str'>"wrapper"</span> <span class='hs-varid'>makeBeginCallback</span> <span class='hs-keyglyph'>::</span> <a name="line-127"></a> <span class='hs-conid'>BeginCallback'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>FunPtr</span> <span class='hs-conid'>BeginCallback'</span><span class='hs-layout'>)</span> <a name="line-128"></a> <a name="line-129"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluNurbsCallback"</span> <a name="line-130"></a> <span class='hs-varid'>setBeginCallback</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FunPtr</span> <span class='hs-conid'>BeginCallback'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-131"></a> <a name="line-132"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-133"></a><span class='hs-comment'>-- chapter 7.2: Callbacks (vertex)</span> <a name="line-134"></a> <a name="line-135"></a><a name="NURBSVertexCallback"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>NURBSVertexCallback</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Vertex3</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-136"></a> <a name="line-137"></a><a name="VertexCallback'"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>VertexCallback'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Vertex3</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-138"></a> <a name="line-139"></a><a name="withNURBSVertexCallback"></a><span class='hs-definition'>withNURBSVertexCallback</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NURBSVertexCallback</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <a name="line-140"></a><span class='hs-definition'>withNURBSVertexCallback</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>vertexCallback</span> <span class='hs-varid'>action</span> <span class='hs-keyglyph'>=</span> <a name="line-141"></a> <span class='hs-varid'>bracket</span> <span class='hs-layout'>(</span><span class='hs-varid'>makeVertexCallback</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>peek</span> <span class='hs-varid'>p</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>vertexCallback</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-142"></a> <span class='hs-varid'>freeHaskellFunPtr</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>callbackPtr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-143"></a> <span class='hs-varid'>setVertexCallback</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-layout'>(</span><span class='hs-varid'>marshalNURBSCallback</span> <span class='hs-conid'>Vertex</span><span class='hs-layout'>)</span> <span class='hs-varid'>callbackPtr</span> <a name="line-144"></a> <span class='hs-varid'>action</span> <a name="line-145"></a> <a name="line-146"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-str'>"wrapper"</span> <span class='hs-varid'>makeVertexCallback</span> <span class='hs-keyglyph'>::</span> <a name="line-147"></a> <span class='hs-conid'>VertexCallback'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>FunPtr</span> <span class='hs-conid'>VertexCallback'</span><span class='hs-layout'>)</span> <a name="line-148"></a> <a name="line-149"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluNurbsCallback"</span> <a name="line-150"></a> <span class='hs-varid'>setVertexCallback</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FunPtr</span> <span class='hs-conid'>VertexCallback'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-151"></a> <a name="line-152"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-153"></a><span class='hs-comment'>-- chapter 7.2: Callbacks (normal)</span> <a name="line-154"></a> <a name="line-155"></a><a name="NURBSNormalCallback"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>NURBSNormalCallback</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Normal3</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-156"></a> <a name="line-157"></a><a name="NormalCallback'"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>NormalCallback'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Normal3</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-158"></a> <a name="line-159"></a><a name="withNURBSNormalCallback"></a><span class='hs-definition'>withNURBSNormalCallback</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NURBSNormalCallback</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <a name="line-160"></a><span class='hs-definition'>withNURBSNormalCallback</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>normalCallback</span> <span class='hs-varid'>action</span> <span class='hs-keyglyph'>=</span> <a name="line-161"></a> <span class='hs-varid'>bracket</span> <span class='hs-layout'>(</span><span class='hs-varid'>makeNormalCallback</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>peek</span> <span class='hs-varid'>p</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>normalCallback</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-162"></a> <span class='hs-varid'>freeHaskellFunPtr</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>callbackPtr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-163"></a> <span class='hs-varid'>setNormalCallback</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-layout'>(</span><span class='hs-varid'>marshalNURBSCallback</span> <span class='hs-conid'>Normal</span><span class='hs-layout'>)</span> <span class='hs-varid'>callbackPtr</span> <a name="line-164"></a> <span class='hs-varid'>action</span> <a name="line-165"></a> <a name="line-166"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-str'>"wrapper"</span> <span class='hs-varid'>makeNormalCallback</span> <span class='hs-keyglyph'>::</span> <a name="line-167"></a> <span class='hs-conid'>NormalCallback'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>FunPtr</span> <span class='hs-conid'>NormalCallback'</span><span class='hs-layout'>)</span> <a name="line-168"></a> <a name="line-169"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluNurbsCallback"</span> <a name="line-170"></a> <span class='hs-varid'>setNormalCallback</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FunPtr</span> <span class='hs-conid'>NormalCallback'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-171"></a> <a name="line-172"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-173"></a><span class='hs-comment'>-- chapter 7.2: Callbacks (color)</span> <a name="line-174"></a> <a name="line-175"></a><a name="NURBSColorCallback"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>NURBSColorCallback</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Color4</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-176"></a> <a name="line-177"></a><a name="ColorCallback'"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>ColorCallback'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Color4</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-178"></a> <a name="line-179"></a><a name="withNURBSColorCallback"></a><span class='hs-definition'>withNURBSColorCallback</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NURBSColorCallback</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <a name="line-180"></a><span class='hs-definition'>withNURBSColorCallback</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>colorCallback</span> <span class='hs-varid'>action</span> <span class='hs-keyglyph'>=</span> <a name="line-181"></a> <span class='hs-varid'>bracket</span> <span class='hs-layout'>(</span><span class='hs-varid'>makeColorCallback</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>peek</span> <span class='hs-varid'>p</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>colorCallback</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-182"></a> <span class='hs-varid'>freeHaskellFunPtr</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>callbackPtr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-183"></a> <span class='hs-varid'>setColorCallback</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-layout'>(</span><span class='hs-varid'>marshalNURBSCallback</span> <span class='hs-conid'>Color</span><span class='hs-layout'>)</span> <span class='hs-varid'>callbackPtr</span> <a name="line-184"></a> <span class='hs-varid'>action</span> <a name="line-185"></a> <a name="line-186"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-str'>"wrapper"</span> <span class='hs-varid'>makeColorCallback</span> <span class='hs-keyglyph'>::</span> <a name="line-187"></a> <span class='hs-conid'>ColorCallback'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>FunPtr</span> <span class='hs-conid'>ColorCallback'</span><span class='hs-layout'>)</span> <a name="line-188"></a> <a name="line-189"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluNurbsCallback"</span> <a name="line-190"></a> <span class='hs-varid'>setColorCallback</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FunPtr</span> <span class='hs-conid'>ColorCallback'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-191"></a> <a name="line-192"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-193"></a><span class='hs-comment'>-- chapter 7.2: Callbacks (end)</span> <a name="line-194"></a> <a name="line-195"></a><a name="NURBSEndCallback"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>NURBSEndCallback</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-196"></a> <a name="line-197"></a><a name="withNURBSEndCallback"></a><span class='hs-definition'>withNURBSEndCallback</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NURBSEndCallback</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <a name="line-198"></a><span class='hs-definition'>withNURBSEndCallback</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>endCallback</span> <span class='hs-varid'>action</span> <span class='hs-keyglyph'>=</span> <a name="line-199"></a> <span class='hs-varid'>bracket</span> <span class='hs-layout'>(</span><span class='hs-varid'>makeEndCallback</span> <span class='hs-varid'>endCallback</span><span class='hs-layout'>)</span> <a name="line-200"></a> <span class='hs-varid'>freeHaskellFunPtr</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>callbackPtr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-201"></a> <span class='hs-varid'>setEndCallback</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-layout'>(</span><span class='hs-varid'>marshalNURBSCallback</span> <span class='hs-conid'>End</span><span class='hs-layout'>)</span> <span class='hs-varid'>callbackPtr</span> <a name="line-202"></a> <span class='hs-varid'>action</span> <a name="line-203"></a> <a name="line-204"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-str'>"wrapper"</span> <span class='hs-varid'>makeEndCallback</span> <span class='hs-keyglyph'>::</span> <a name="line-205"></a> <span class='hs-conid'>NURBSEndCallback</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>FunPtr</span> <span class='hs-conid'>NURBSEndCallback</span><span class='hs-layout'>)</span> <a name="line-206"></a> <a name="line-207"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluNurbsCallback"</span> <a name="line-208"></a> <span class='hs-varid'>setEndCallback</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FunPtr</span> <span class='hs-conid'>NURBSEndCallback</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-209"></a> <a name="line-210"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-211"></a><span class='hs-comment'>-- chapter 7.2: Callbacks (error)</span> <a name="line-212"></a> <a name="line-213"></a><a name="ErrorCallback"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>ErrorCallback</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-214"></a> <a name="line-215"></a><a name="withErrorCallback"></a><span class='hs-definition'>withErrorCallback</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ErrorCallback</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <a name="line-216"></a><span class='hs-definition'>withErrorCallback</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>errorCallback</span> <span class='hs-varid'>action</span> <span class='hs-keyglyph'>=</span> <a name="line-217"></a> <span class='hs-varid'>bracket</span> <span class='hs-layout'>(</span><span class='hs-varid'>makeErrorCallback</span> <span class='hs-varid'>errorCallback</span><span class='hs-layout'>)</span> <a name="line-218"></a> <span class='hs-varid'>freeHaskellFunPtr</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>callbackPtr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-219"></a> <span class='hs-varid'>setErrorCallback</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-layout'>(</span><span class='hs-varid'>marshalNURBSCallback</span> <span class='hs-conid'>Error</span><span class='hs-layout'>)</span> <span class='hs-varid'>callbackPtr</span> <a name="line-220"></a> <span class='hs-varid'>action</span> <a name="line-221"></a> <a name="line-222"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-str'>"wrapper"</span> <span class='hs-varid'>makeErrorCallback</span> <span class='hs-keyglyph'>::</span> <a name="line-223"></a> <span class='hs-conid'>ErrorCallback</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>FunPtr</span> <span class='hs-conid'>ErrorCallback</span><span class='hs-layout'>)</span> <a name="line-224"></a> <a name="line-225"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluNurbsCallback"</span> <a name="line-226"></a> <span class='hs-varid'>setErrorCallback</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FunPtr</span> <span class='hs-conid'>ErrorCallback</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-227"></a> <a name="line-228"></a><a name="checkForNURBSError"></a><span class='hs-definition'>checkForNURBSError</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <a name="line-229"></a><span class='hs-definition'>checkForNURBSError</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withErrorCallback</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>recordErrorCode</span> <a name="line-230"></a> <a name="line-231"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-232"></a><span class='hs-comment'>-- chapter 7.3: NURBS Curves</span> <a name="line-233"></a> <a name="line-234"></a><a name="nurbsBeginEndCurve"></a><span class='hs-definition'>nurbsBeginEndCurve</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <a name="line-235"></a><span class='hs-definition'>nurbsBeginEndCurve</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-keyglyph'>=</span> <a name="line-236"></a> <span class='hs-varid'>bracket_</span> <span class='hs-layout'>(</span><span class='hs-varid'>gluBeginCurve</span> <span class='hs-varid'>nurbsObj</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>gluEndCurve</span> <span class='hs-varid'>nurbsObj</span><span class='hs-layout'>)</span> <a name="line-237"></a> <a name="line-238"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluBeginCurve"</span> <a name="line-239"></a> <span class='hs-varid'>gluBeginCurve</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-240"></a> <a name="line-241"></a><a name="nurbsCurve"></a><span class='hs-definition'>nurbsCurve</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ControlPoint</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-242"></a><span class='hs-definition'>nurbsCurve</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>knotCount</span> <span class='hs-varid'>knots</span> <span class='hs-varid'>stride</span> <span class='hs-varid'>control</span> <span class='hs-varid'>order</span> <span class='hs-keyglyph'>=</span> <a name="line-243"></a> <span class='hs-varid'>gluNurbsCurve</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>knotCount</span> <span class='hs-varid'>knots</span> <span class='hs-varid'>stride</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>control</span><span class='hs-layout'>)</span> <span class='hs-varid'>order</span> <span class='hs-layout'>(</span><span class='hs-varid'>map1Target</span> <span class='hs-layout'>(</span><span class='hs-varid'>pseudoPeek</span> <span class='hs-varid'>control</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-244"></a> <a name="line-245"></a><a name="pseudoPeek"></a><span class='hs-definition'>pseudoPeek</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>c</span> <span class='hs-conid'>GLfloat</span> <a name="line-246"></a><span class='hs-definition'>pseudoPeek</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>undefined</span> <a name="line-247"></a> <a name="line-248"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluNurbsCurve"</span> <a name="line-249"></a> <span class='hs-varid'>gluNurbsCurve</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-250"></a> <a name="line-251"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluEndCurve"</span> <a name="line-252"></a> <span class='hs-varid'>gluEndCurve</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-253"></a> <a name="line-254"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-255"></a><span class='hs-comment'>-- chapter 7.4: NURBS Surfaces</span> <a name="line-256"></a> <a name="line-257"></a><a name="nurbsBeginEndSurface"></a><span class='hs-definition'>nurbsBeginEndSurface</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <a name="line-258"></a><span class='hs-definition'>nurbsBeginEndSurface</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-keyglyph'>=</span> <a name="line-259"></a> <span class='hs-varid'>bracket_</span> <span class='hs-layout'>(</span><span class='hs-varid'>gluBeginSurface</span> <span class='hs-varid'>nurbsObj</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>gluEndSurface</span> <span class='hs-varid'>nurbsObj</span><span class='hs-layout'>)</span> <a name="line-260"></a> <a name="line-261"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluBeginSurface"</span> <a name="line-262"></a> <span class='hs-varid'>gluBeginSurface</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-263"></a> <a name="line-264"></a><a name="nurbsSurface"></a><span class='hs-definition'>nurbsSurface</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ControlPoint</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-265"></a><span class='hs-definition'>nurbsSurface</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>sKnotCount</span> <span class='hs-varid'>sKnots</span> <span class='hs-varid'>tKnotCount</span> <span class='hs-varid'>tKnots</span> <span class='hs-varid'>sStride</span> <span class='hs-varid'>tStride</span> <span class='hs-varid'>control</span> <span class='hs-varid'>sOrder</span> <span class='hs-varid'>tOrder</span> <span class='hs-keyglyph'>=</span> <a name="line-266"></a> <span class='hs-varid'>gluNurbsSurface</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>sKnotCount</span> <span class='hs-varid'>sKnots</span> <span class='hs-varid'>tKnotCount</span> <span class='hs-varid'>tKnots</span> <span class='hs-varid'>sStride</span> <span class='hs-varid'>tStride</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>control</span><span class='hs-layout'>)</span> <span class='hs-varid'>sOrder</span> <span class='hs-varid'>tOrder</span> <span class='hs-layout'>(</span><span class='hs-varid'>map2Target</span> <span class='hs-layout'>(</span><span class='hs-varid'>pseudoPeek</span> <span class='hs-varid'>control</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-267"></a> <a name="line-268"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluNurbsSurface"</span> <a name="line-269"></a> <span class='hs-varid'>gluNurbsSurface</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-270"></a> <a name="line-271"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluEndSurface"</span> <a name="line-272"></a> <span class='hs-varid'>gluEndSurface</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-273"></a> <a name="line-274"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-275"></a><span class='hs-comment'>-- chapter 7.5: Trimming</span> <a name="line-276"></a> <a name="line-277"></a><a name="TrimmingPoint"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>TrimmingPoint</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>where</span> <a name="line-278"></a> <span class='hs-varid'>trimmingTarget</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>p</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <a name="line-279"></a> <a name="line-280"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>TrimmingPoint</span> <span class='hs-conid'>Vertex2</span> <span class='hs-keyword'>where</span> <a name="line-281"></a> <span class='hs-varid'>trimmingTarget</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>marshalNURBSTrim</span> <span class='hs-varop'>.</span> <span class='hs-varid'>const</span> <span class='hs-conid'>Map1Trim2</span> <a name="line-282"></a> <a name="line-283"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>TrimmingPoint</span> <span class='hs-conid'>Vertex3</span> <span class='hs-keyword'>where</span> <a name="line-284"></a> <span class='hs-varid'>trimmingTarget</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>marshalNURBSTrim</span> <span class='hs-varop'>.</span> <span class='hs-varid'>const</span> <span class='hs-conid'>Map1Trim3</span> <a name="line-285"></a> <a name="line-286"></a><a name="NURBSTrim"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>NURBSTrim</span> <span class='hs-keyglyph'>=</span> <a name="line-287"></a> <span class='hs-conid'>Map1Trim2</span> <a name="line-288"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Map1Trim3</span> <a name="line-289"></a> <a name="line-290"></a><a name="marshalNURBSTrim"></a><span class='hs-definition'>marshalNURBSTrim</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSTrim</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <a name="line-291"></a><span class='hs-definition'>marshalNURBSTrim</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span> <a name="line-292"></a> <span class='hs-conid'>Map1Trim2</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100210</span> <a name="line-293"></a> <span class='hs-conid'>Map1Trim3</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100211</span> <a name="line-294"></a> <a name="line-295"></a><a name="nurbsBeginEndTrim"></a><span class='hs-definition'>nurbsBeginEndTrim</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <a name="line-296"></a><span class='hs-definition'>nurbsBeginEndTrim</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-keyglyph'>=</span> <a name="line-297"></a> <span class='hs-varid'>bracket_</span> <span class='hs-layout'>(</span><span class='hs-varid'>gluBeginTrim</span> <span class='hs-varid'>nurbsObj</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>gluEndTrim</span> <span class='hs-varid'>nurbsObj</span><span class='hs-layout'>)</span> <a name="line-298"></a> <a name="line-299"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluBeginTrim"</span> <a name="line-300"></a> <span class='hs-varid'>gluBeginTrim</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-301"></a> <a name="line-302"></a><a name="pwlCurve"></a><span class='hs-definition'>pwlCurve</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TrimmingPoint</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-303"></a><span class='hs-definition'>pwlCurve</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>count</span> <span class='hs-varid'>points</span> <span class='hs-varid'>stride</span> <span class='hs-keyglyph'>=</span> <a name="line-304"></a> <span class='hs-varid'>gluPwlCurve</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>count</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>points</span><span class='hs-layout'>)</span> <span class='hs-varid'>stride</span> <span class='hs-layout'>(</span><span class='hs-varid'>trimmingTarget</span> <span class='hs-layout'>(</span><span class='hs-varid'>pseudoPeek</span> <span class='hs-varid'>points</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-305"></a> <a name="line-306"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluPwlCurve"</span> <a name="line-307"></a> <span class='hs-varid'>gluPwlCurve</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-308"></a> <a name="line-309"></a><a name="trimmingCurve"></a><span class='hs-definition'>trimmingCurve</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TrimmingPoint</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-310"></a><span class='hs-definition'>trimmingCurve</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>knotCount</span> <span class='hs-varid'>knots</span> <span class='hs-varid'>stride</span> <span class='hs-varid'>control</span> <span class='hs-varid'>order</span> <span class='hs-keyglyph'>=</span> <a name="line-311"></a> <span class='hs-varid'>gluNurbsCurve</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>knotCount</span> <span class='hs-varid'>knots</span> <span class='hs-varid'>stride</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>control</span><span class='hs-layout'>)</span> <span class='hs-varid'>order</span> <span class='hs-layout'>(</span><span class='hs-varid'>trimmingTarget</span> <span class='hs-layout'>(</span><span class='hs-varid'>pseudoPeek</span> <span class='hs-varid'>control</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-312"></a> <a name="line-313"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluEndTrim"</span> <a name="line-314"></a> <span class='hs-varid'>gluEndTrim</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-315"></a> <a name="line-316"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-317"></a><span class='hs-comment'>-- chapter 7.6: NURBS Properties</span> <a name="line-318"></a> <a name="line-319"></a><a name="NURBSProperty"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>NURBSProperty</span> <span class='hs-keyglyph'>=</span> <a name="line-320"></a> <span class='hs-conid'>AutoLoadMatrix</span> <a name="line-321"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Culling</span> <a name="line-322"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ParametricTolerance</span> <a name="line-323"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>SamplingTolerance</span> <a name="line-324"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>DisplayMode'</span> <a name="line-325"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>SamplingMethod</span> <a name="line-326"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>UStep</span> <a name="line-327"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>VStep</span> <a name="line-328"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>NURBSMode</span> <a name="line-329"></a> <a name="line-330"></a><a name="marshalNURBSProperty"></a><span class='hs-definition'>marshalNURBSProperty</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSProperty</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <a name="line-331"></a><span class='hs-definition'>marshalNURBSProperty</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span> <a name="line-332"></a> <span class='hs-conid'>AutoLoadMatrix</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100200</span> <a name="line-333"></a> <span class='hs-conid'>Culling</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100201</span> <a name="line-334"></a> <span class='hs-conid'>ParametricTolerance</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100202</span> <a name="line-335"></a> <span class='hs-conid'>SamplingTolerance</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100203</span> <a name="line-336"></a> <span class='hs-conid'>DisplayMode'</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100204</span> <a name="line-337"></a> <span class='hs-conid'>SamplingMethod</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100205</span> <a name="line-338"></a> <span class='hs-conid'>UStep</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100206</span> <a name="line-339"></a> <span class='hs-conid'>VStep</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100207</span> <a name="line-340"></a> <span class='hs-conid'>NURBSMode</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100160</span> <a name="line-341"></a> <a name="line-342"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-343"></a> <a name="line-344"></a><a name="setNURBSProperty"></a><span class='hs-definition'>setNURBSProperty</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NURBSProperty</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-345"></a><span class='hs-definition'>setNURBSProperty</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gluNurbsProperty</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varop'>.</span> <span class='hs-varid'>marshalNURBSProperty</span> <a name="line-346"></a> <a name="line-347"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluNurbsProperty"</span> <a name="line-348"></a> <span class='hs-varid'>gluNurbsProperty</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-349"></a> <a name="line-350"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-351"></a> <a name="line-352"></a><a name="NURBSMode"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>NURBSMode</span> <span class='hs-keyglyph'>=</span> <a name="line-353"></a> <span class='hs-conid'>NURBSTessellator</span> <a name="line-354"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>NURBSRenderer</span> <a name="line-355"></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-356"></a> <a name="line-357"></a><a name="marshalNURBSMode"></a><span class='hs-definition'>marshalNURBSMode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSMode</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLfloat</span> <a name="line-358"></a><span class='hs-definition'>marshalNURBSMode</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span> <a name="line-359"></a> <span class='hs-conid'>NURBSTessellator</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100161</span> <a name="line-360"></a> <span class='hs-conid'>NURBSRenderer</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100162</span> <a name="line-361"></a> <a name="line-362"></a><a name="setNURBSMode"></a><span class='hs-definition'>setNURBSMode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NURBSMode</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-363"></a><span class='hs-definition'>setNURBSMode</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>setNURBSProperty</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>NURBSMode</span> <span class='hs-varop'>.</span> <span class='hs-varid'>marshalNURBSMode</span> <a name="line-364"></a> <a name="line-365"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-366"></a> <a name="line-367"></a><a name="setNURBSCulling"></a><span class='hs-definition'>setNURBSCulling</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Capability</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-368"></a><span class='hs-definition'>setNURBSCulling</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>setNURBSProperty</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>Culling</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varop'>.</span> <span class='hs-varid'>marshalCapability</span> <a name="line-369"></a> <a name="line-370"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-371"></a> <a name="line-372"></a><a name="SamplingMethod'"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>SamplingMethod'</span> <span class='hs-keyglyph'>=</span> <a name="line-373"></a> <span class='hs-conid'>PathLength'</span> <a name="line-374"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ParametricError'</span> <a name="line-375"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>DomainDistance'</span> <a name="line-376"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ObjectPathLength'</span> <a name="line-377"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ObjectParametricError'</span> <a name="line-378"></a> <a name="line-379"></a><a name="marshalSamplingMethod'"></a><span class='hs-definition'>marshalSamplingMethod'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SamplingMethod'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLfloat</span> <a name="line-380"></a><span class='hs-definition'>marshalSamplingMethod'</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span> <a name="line-381"></a> <span class='hs-conid'>PathLength'</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100215</span> <a name="line-382"></a> <span class='hs-conid'>ParametricError'</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100216</span> <a name="line-383"></a> <span class='hs-conid'>DomainDistance'</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100217</span> <a name="line-384"></a> <span class='hs-conid'>ObjectPathLength'</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100209</span> <a name="line-385"></a> <span class='hs-conid'>ObjectParametricError'</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100208</span> <a name="line-386"></a> <a name="line-387"></a><a name="setSamplingMethod'"></a><span class='hs-definition'>setSamplingMethod'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SamplingMethod'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-388"></a><span class='hs-definition'>setSamplingMethod'</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>setNURBSProperty</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>SamplingMethod</span> <span class='hs-varop'>.</span> <span class='hs-varid'>marshalSamplingMethod'</span> <a name="line-389"></a> <a name="line-390"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-391"></a> <a name="line-392"></a><a name="SamplingMethod"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>SamplingMethod</span> <span class='hs-keyglyph'>=</span> <a name="line-393"></a> <span class='hs-conid'>PathLength</span> <span class='hs-conid'>GLfloat</span> <a name="line-394"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ParametricError</span> <span class='hs-conid'>GLfloat</span> <a name="line-395"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>DomainDistance</span> <span class='hs-conid'>GLfloat</span> <span class='hs-conid'>GLfloat</span> <a name="line-396"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ObjectPathLength</span> <span class='hs-conid'>GLfloat</span> <a name="line-397"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ObjectParametricError</span> <span class='hs-conid'>GLfloat</span> <a name="line-398"></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-399"></a> <a name="line-400"></a><a name="setSamplingMethod"></a><span class='hs-definition'>setSamplingMethod</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SamplingMethod</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-401"></a><span class='hs-definition'>setSamplingMethod</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span> <a name="line-402"></a> <span class='hs-conid'>PathLength</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-403"></a> <span class='hs-varid'>setNURBSProperty</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>SamplingTolerance</span> <span class='hs-varid'>s</span> <a name="line-404"></a> <span class='hs-varid'>setSamplingMethod'</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>PathLength'</span> <a name="line-405"></a> <span class='hs-conid'>ParametricError</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-406"></a> <span class='hs-varid'>setNURBSProperty</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>ParametricTolerance</span> <span class='hs-varid'>p</span> <a name="line-407"></a> <span class='hs-varid'>setSamplingMethod'</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>ParametricError'</span> <a name="line-408"></a> <span class='hs-conid'>DomainDistance</span> <span class='hs-varid'>u</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-409"></a> <span class='hs-varid'>setNURBSProperty</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>UStep</span> <span class='hs-varid'>u</span> <a name="line-410"></a> <span class='hs-varid'>setNURBSProperty</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>VStep</span> <span class='hs-varid'>v</span> <a name="line-411"></a> <span class='hs-varid'>setSamplingMethod'</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>DomainDistance'</span> <a name="line-412"></a> <span class='hs-conid'>ObjectPathLength</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-413"></a> <span class='hs-varid'>setNURBSProperty</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>SamplingTolerance</span> <span class='hs-varid'>s</span> <a name="line-414"></a> <span class='hs-varid'>setSamplingMethod'</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>ObjectPathLength'</span> <a name="line-415"></a> <span class='hs-conid'>ObjectParametricError</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-416"></a> <span class='hs-varid'>setNURBSProperty</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>ParametricTolerance</span> <span class='hs-varid'>p</span> <a name="line-417"></a> <span class='hs-varid'>setSamplingMethod'</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>ObjectParametricError'</span> <a name="line-418"></a> <a name="line-419"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-420"></a> <a name="line-421"></a><a name="setAutoLoadMatrix"></a><span class='hs-definition'>setAutoLoadMatrix</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-422"></a><span class='hs-definition'>setAutoLoadMatrix</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>setNURBSProperty</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>AutoLoadMatrix</span> <span class='hs-varop'>.</span> <span class='hs-varid'>marshalGLboolean</span> <a name="line-423"></a> <a name="line-424"></a><a name="loadSamplingMatrices"></a><span class='hs-definition'>loadSamplingMatrices</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Matrix</span> <span class='hs-varid'>m1</span><span class='hs-layout'>,</span> <span class='hs-conid'>Matrix</span> <span class='hs-varid'>m2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>m1</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>,</span> <span class='hs-varid'>m2</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>Position</span><span class='hs-layout'>,</span> <span class='hs-conid'>Size</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-425"></a><span class='hs-definition'>loadSamplingMatrices</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-keyglyph'>=</span> <a name="line-426"></a> <span class='hs-varid'>maybe</span> <a name="line-427"></a> <span class='hs-layout'>(</span><span class='hs-varid'>setAutoLoadMatrix</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>True</span><span class='hs-layout'>)</span> <a name="line-428"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>mv</span><span class='hs-layout'>,</span> <span class='hs-varid'>proj</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>Position</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>,</span> <span class='hs-conid'>Size</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-429"></a> <span class='hs-varid'>withMatrixColumnMajor</span> <span class='hs-varid'>mv</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>mvBuf</span> <span class='hs-keyglyph'>-></span> <a name="line-430"></a> <span class='hs-varid'>withMatrixColumnMajor</span> <span class='hs-varid'>proj</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>projBuf</span> <span class='hs-keyglyph'>-></span> <a name="line-431"></a> <span class='hs-varid'>withArray</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>y</span><span class='hs-layout'>,</span> <span class='hs-varid'>w</span><span class='hs-layout'>,</span> <span class='hs-varid'>h</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>viewportBuf</span> <span class='hs-keyglyph'>-></span> <a name="line-432"></a> <span class='hs-varid'>gluLoadSamplingMatrices</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-varid'>mvBuf</span> <span class='hs-varid'>projBuf</span> <span class='hs-varid'>viewportBuf</span> <a name="line-433"></a> <span class='hs-varid'>setAutoLoadMatrix</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>False</span><span class='hs-layout'>)</span> <a name="line-434"></a> <a name="line-435"></a><a name="withMatrixColumnMajor"></a><span class='hs-definition'>withMatrixColumnMajor</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Matrix</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>MatrixComponent</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>m</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <a name="line-436"></a><span class='hs-definition'>withMatrixColumnMajor</span> <span class='hs-varid'>mat</span> <span class='hs-varid'>act</span> <span class='hs-keyglyph'>=</span> <a name="line-437"></a> <span class='hs-varid'>withMatrix</span> <span class='hs-varid'>mat</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>order</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <a name="line-438"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>order</span> <span class='hs-varop'>==</span> <span class='hs-conid'>ColumnMajor</span> <a name="line-439"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>act</span> <span class='hs-varid'>p</span> <a name="line-440"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span> <a name="line-441"></a> <span class='hs-varid'>elems</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapM</span> <span class='hs-layout'>(</span><span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>[</span> <span class='hs-num'>0</span><span class='hs-layout'>,</span> <span class='hs-num'>4</span><span class='hs-layout'>,</span> <span class='hs-num'>8</span><span class='hs-layout'>,</span> <span class='hs-num'>12</span><span class='hs-layout'>,</span> <a name="line-442"></a> <span class='hs-num'>1</span><span class='hs-layout'>,</span> <span class='hs-num'>5</span><span class='hs-layout'>,</span> <span class='hs-num'>9</span><span class='hs-layout'>,</span> <span class='hs-num'>13</span><span class='hs-layout'>,</span> <a name="line-443"></a> <span class='hs-num'>2</span><span class='hs-layout'>,</span> <span class='hs-num'>6</span><span class='hs-layout'>,</span> <span class='hs-num'>10</span><span class='hs-layout'>,</span> <span class='hs-num'>14</span><span class='hs-layout'>,</span> <a name="line-444"></a> <span class='hs-num'>3</span><span class='hs-layout'>,</span> <span class='hs-num'>7</span><span class='hs-layout'>,</span> <span class='hs-num'>11</span><span class='hs-layout'>,</span> <span class='hs-num'>15</span> <span class='hs-keyglyph'>]</span> <a name="line-445"></a> <span class='hs-varid'>withArray</span> <span class='hs-varid'>elems</span> <span class='hs-varid'>act</span> <a name="line-446"></a> <a name="line-447"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>safe</span> <span class='hs-str'>"gluLoadSamplingMatrices"</span> <a name="line-448"></a> <span class='hs-varid'>gluLoadSamplingMatrices</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-449"></a> <a name="line-450"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-451"></a> <a name="line-452"></a><a name="DisplayMode'"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>DisplayMode'</span> <span class='hs-keyglyph'>=</span> <a name="line-453"></a> <span class='hs-conid'>Fill'</span> <a name="line-454"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>OutlinePolygon</span> <a name="line-455"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>OutlinePatch</span> <a name="line-456"></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-457"></a> <a name="line-458"></a><a name="marshalDisplayMode'"></a><span class='hs-definition'>marshalDisplayMode'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DisplayMode'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLfloat</span> <a name="line-459"></a><span class='hs-definition'>marshalDisplayMode'</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span> <a name="line-460"></a> <span class='hs-conid'>Fill'</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100012</span> <a name="line-461"></a> <span class='hs-conid'>OutlinePolygon</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100240</span> <a name="line-462"></a> <span class='hs-conid'>OutlinePatch</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>100241</span> <a name="line-463"></a> <a name="line-464"></a><a name="setDisplayMode'"></a><span class='hs-definition'>setDisplayMode'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NURBSObj</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DisplayMode'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-465"></a><span class='hs-definition'>setDisplayMode'</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>setNURBSProperty</span> <span class='hs-varid'>nurbsObj</span> <span class='hs-conid'>DisplayMode'</span> <span class='hs-varop'>.</span> <span class='hs-varid'>marshalDisplayMode'</span> </pre></body> </html>
