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</script></head><body><div id="package-header"><ul class="links" id="page-menu"><li><a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html">Source</a></li><li><a href="index.html">Contents</a></li><li><a href="doc-index.html">Index</a></li></ul><p class="caption">OpenGL-2.2.3.0: A binding for the OpenGL graphics system</p></div><div id="content"><div id="module-header"><table class="info"><tr><th>Portability</th><td>portable</td></tr><tr><th>Stability</th><td>stable</td></tr><tr><th>Maintainer</th><td>sven.panne@aedion.de</td></tr></table><p class="caption">Graphics.Rendering.OpenGL.GL.Evaluators</p></div><div id="table-of-contents"><p class="caption">Contents</p><ul><li><a href="#g:1">Evaluator-related Types
</a></li><li><a href="#g:2">Defining Evaluator Maps
</a><ul><li><a href="#g:3">One-dimensional Evaluator Maps
</a></li><li><a href="#g:4">Two-dimensional Evaluator Maps
</a></li></ul></li><li><a href="#g:5">Using Evaluator Maps
</a><ul><li><a href="#g:6">Evaluating an Arbitrary Coordinate Value
</a></li><li><a href="#g:7">Using Evenly Spaced Coordinate Values
</a><ul><li><a href="#g:8">Defining a Grid
</a></li><li><a href="#g:9">Evaluating a Whole Mesh
</a></li><li><a href="#g:10">Evaluating a Single Point on a Mesh
</a></li></ul></li></ul></li><li><a href="#g:11">Normal Generation
</a></li></ul></div><div id="description"><p class="caption">Description</p><div class="doc"><p>This module corresponds to section 5.1 (Evaluators) of the OpenGL 2.1 specs.
</p></div></div><div id="synopsis"><p id="control.syn" class="caption expander" onclick="toggleSection('syn')">Synopsis</p><ul id="section.syn" class="hide" onclick="toggleSection('syn')"><li class="src short"><span class="keyword">type</span> <a href="#t:Order">Order</a> = <a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a></li><li class="src short"><a href="#v:maxOrder">maxOrder</a> :: <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:GettableStateVar">GettableStateVar</a> <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Order">Order</a></li><li class="src short"><span class="keyword">class</span> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Foreign-Storable.html#t:Storable">Storable</a> d => <a href="#t:Domain">Domain</a> d <span class="keyword">where</span><ul class="subs"><li><a href="#v:evalCoord1">evalCoord1</a> :: d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li><a href="#v:evalCoord1v">evalCoord1v</a> :: <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Foreign-Ptr.html#t:Ptr">Ptr</a> d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li><a href="#v:evalCoord2">evalCoord2</a> :: (d, d) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li><a href="#v:evalCoord2v">evalCoord2v</a> :: <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Foreign-Ptr.html#t:Ptr">Ptr</a> d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li></ul></li><li class="src short"><span class="keyword">data</span> <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d => <a href="#t:MapDescriptor">MapDescriptor</a> d = <a href="#v:MapDescriptor">MapDescriptor</a> (d, d) <a href="Graphics-Rendering-OpenGL-GL-VertexArrays.html#t:Stride">Stride</a> <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Order">Order</a> <a href="Graphics-Rendering-OpenGL-GL-VertexArrays.html#t:NumComponents">NumComponents</a></li><li class="src short"><span class="keyword">class</span> <a href="#t:ControlPoint">ControlPoint</a> c </li><li class="src short"><span class="keyword">class</span> <a href="#t:Map1">Map1</a> m <span class="keyword">where</span><ul class="subs"><li><a href="#v:withNewMap1">withNewMap1</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:MapDescriptor">MapDescriptor</a> d -> (<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Foreign-Ptr.html#t:Ptr">Ptr</a> d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a>) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> (m c d)</li><li><a href="#v:withMap1">withMap1</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => m c d -> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:MapDescriptor">MapDescriptor</a> d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Foreign-Ptr.html#t:Ptr">Ptr</a> d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> a) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> a</li><li><a href="#v:newMap1">newMap1</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => (d, d) -> [c d] -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> (m c d)</li><li><a href="#v:getMap1Components">getMap1Components</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => m c d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> ((d, d), [c d])</li></ul></li><li class="src short"><span class="keyword">data</span> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => <a href="#t:GLmap1">GLmap1</a> c d</li><li class="src short"><a href="#v:map1">map1</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Map1">Map1</a> m, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a> (<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Maybe.html#t:Maybe">Maybe</a> (m c d))</li><li class="src short"><span class="keyword">class</span> <a href="#t:Map2">Map2</a> m <span class="keyword">where</span><ul class="subs"><li><a href="#v:withNewMap2">withNewMap2</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:MapDescriptor">MapDescriptor</a> d -> <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:MapDescriptor">MapDescriptor</a> d -> (<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Foreign-Ptr.html#t:Ptr">Ptr</a> d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a>) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> (m c d)</li><li><a href="#v:withMap2">withMap2</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => m c d -> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:MapDescriptor">MapDescriptor</a> d -> <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:MapDescriptor">MapDescriptor</a> d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Foreign-Ptr.html#t:Ptr">Ptr</a> d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> a) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> a</li><li><a href="#v:newMap2">newMap2</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => (d, d) -> (d, d) -> [[c d]] -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> (m c d)</li><li><a href="#v:getMap2Components">getMap2Components</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => m c d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> ((d, d), (d, d), [[c d]])</li></ul></li><li class="src short"><span class="keyword">data</span> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => <a href="#t:GLmap2">GLmap2</a> c d</li><li class="src short"><a href="#v:map2">map2</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Map2">Map2</a> m, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a> (<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Maybe.html#t:Maybe">Maybe</a> (m c d))</li><li class="src short"><a href="#v:mapGrid1">mapGrid1</a> :: <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d => <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a> (<a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>, (d, d))</li><li class="src short"><a href="#v:mapGrid2">mapGrid2</a> :: <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d => <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a> ((<a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>, (d, d)), (<a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>, (d, d)))</li><li class="src short"><a href="#v:evalMesh1">evalMesh1</a> :: <a href="Graphics-Rendering-OpenGL-GL-Polygons.html#t:PolygonMode">PolygonMode</a> -> (<a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>, <a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li class="src short"><a href="#v:evalMesh2">evalMesh2</a> :: <a href="Graphics-Rendering-OpenGL-GL-Polygons.html#t:PolygonMode">PolygonMode</a> -> (<a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>, <a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>) -> (<a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>, <a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li class="src short"><a href="#v:evalPoint1">evalPoint1</a> :: <a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li class="src short"><a href="#v:evalPoint2">evalPoint2</a> :: (<a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>, <a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li class="src short"><a href="#v:autoNormal">autoNormal</a> :: <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a> <a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:Capability">Capability</a></li></ul></div><div id="interface"><h1 id="g:1">Evaluator-related Types
</h1><div class="top"><p class="src"><span class="keyword">type</span> <a name="t:Order" class="def">Order</a> = <a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a><a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#Order" class="link">Source</a></p></div><div class="top"><p class="src"><a name="v:maxOrder" class="def">maxOrder</a> :: <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:GettableStateVar">GettableStateVar</a> <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Order">Order</a><a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#maxOrder" class="link">Source</a></p></div><div class="top"><p class="src"><span class="keyword">class</span> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Foreign-Storable.html#t:Storable">Storable</a> d => <a name="t:Domain" class="def">Domain</a> d <span class="keyword">where</span><a href="src/Graphics-Rendering-OpenGL-GL-Domain.html#Domain" class="link">Source</a></p><div class="subs methods"><p class="caption">Methods</p><p class="src"><a name="v:evalCoord1" class="def">evalCoord1</a> :: d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-Rendering-OpenGL-GL-Domain.html#evalCoord1" class="link">Source</a></p><p class="src"><a name="v:evalCoord1v" class="def">evalCoord1v</a> :: <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Foreign-Ptr.html#t:Ptr">Ptr</a> d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-Rendering-OpenGL-GL-Domain.html#evalCoord1v" class="link">Source</a></p><p class="src"><a name="v:evalCoord2" class="def">evalCoord2</a> :: (d, d) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-Rendering-OpenGL-GL-Domain.html#evalCoord2" class="link">Source</a></p><p class="src"><a name="v:evalCoord2v" class="def">evalCoord2v</a> :: <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Foreign-Ptr.html#t:Ptr">Ptr</a> d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-Rendering-OpenGL-GL-Domain.html#evalCoord2v" class="link">Source</a></p></div><div class="subs instances"><p id="control.i:Domain" class="caption collapser" onclick="toggleSection('i:Domain')">Instances</p><div id="section.i:Domain" class="show"><table><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Prelude.html#t:Double">Double</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Prelude.html#t:Float">Float</a></td><td class="doc empty"> </td></tr></table></div></div></div><div class="top"><p class="src"><span class="keyword">data</span> <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d => <a name="t:MapDescriptor" class="def">MapDescriptor</a> d <a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#MapDescriptor" class="link">Source</a></p><div class="subs constructors"><p class="caption">Constructors</p><table><tr><td class="src"><a name="v:MapDescriptor" class="def">MapDescriptor</a> (d, d) <a href="Graphics-Rendering-OpenGL-GL-VertexArrays.html#t:Stride">Stride</a> <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Order">Order</a> <a href="Graphics-Rendering-OpenGL-GL-VertexArrays.html#t:NumComponents">NumComponents</a></td><td class="doc empty"> </td></tr></table></div><div class="subs instances"><p id="control.i:MapDescriptor" class="caption collapser" onclick="toggleSection('i:MapDescriptor')">Instances</p><div id="section.i:MapDescriptor" class="show"><table><tr><td class="src">(<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Eq.html#t:Eq">Eq</a> d, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Eq.html#t:Eq">Eq</a> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:MapDescriptor">MapDescriptor</a> d)</td><td class="doc empty"> </td></tr><tr><td class="src">(<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Ord.html#t:Ord">Ord</a> d, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Ord.html#t:Ord">Ord</a> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:MapDescriptor">MapDescriptor</a> d)</td><td class="doc empty"> </td></tr><tr><td class="src">(<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Text-Show.html#t:Show">Show</a> d, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Text-Show.html#t:Show">Show</a> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:MapDescriptor">MapDescriptor</a> d)</td><td class="doc empty"> </td></tr></table></div></div></div><div class="top"><p class="src"><span class="keyword">class</span> <a name="t:ControlPoint" class="def">ControlPoint</a> c <a href="src/Graphics-Rendering-OpenGL-GL-ControlPoint.html#ControlPoint" class="link">Source</a></p><div class="subs instances"><p id="control.i:ControlPoint" class="caption collapser" onclick="toggleSection('i:ControlPoint')">Instances</p><div id="section.i:ControlPoint" class="show"><table><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> <a href="Graphics-Rendering-OpenGL-GL-VertexSpec.html#t:Vertex4">Vertex4</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> <a href="Graphics-Rendering-OpenGL-GL-VertexSpec.html#t:Vertex3">Vertex3</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> <a href="Graphics-Rendering-OpenGL-GL-VertexSpec.html#t:Index1">Index1</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> <a href="Graphics-Rendering-OpenGL-GL-VertexSpec.html#t:Color4">Color4</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> <a href="Graphics-Rendering-OpenGL-GL-VertexSpec.html#t:Normal3">Normal3</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> <a href="Graphics-Rendering-OpenGL-GL-VertexSpec.html#t:TexCoord4">TexCoord4</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> <a href="Graphics-Rendering-OpenGL-GL-VertexSpec.html#t:TexCoord3">TexCoord3</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> <a href="Graphics-Rendering-OpenGL-GL-VertexSpec.html#t:TexCoord2">TexCoord2</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> <a href="Graphics-Rendering-OpenGL-GL-VertexSpec.html#t:TexCoord1">TexCoord1</a></td><td class="doc empty"> </td></tr></table></div></div></div><h1 id="g:2">Defining Evaluator Maps
</h1><h2 id="g:3">One-dimensional Evaluator Maps
</h2><div class="top"><p class="src"><span class="keyword">class</span> <a name="t:Map1" class="def">Map1</a> m <span class="keyword">where</span><a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#Map1" class="link">Source</a></p><div class="subs methods"><p class="caption">Methods</p><p class="src"><a name="v:withNewMap1" class="def">withNewMap1</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:MapDescriptor">MapDescriptor</a> d -> (<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Foreign-Ptr.html#t:Ptr">Ptr</a> d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a>) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> (m c d)<a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#withNewMap1" class="link">Source</a></p><p class="src"><a name="v:withMap1" class="def">withMap1</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => m c d -> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:MapDescriptor">MapDescriptor</a> d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Foreign-Ptr.html#t:Ptr">Ptr</a> d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> a) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> a<a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#withMap1" class="link">Source</a></p><p class="src"><a name="v:newMap1" class="def">newMap1</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => (d, d) -> [c d] -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> (m c d)<a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#newMap1" class="link">Source</a></p><p class="src"><a name="v:getMap1Components" class="def">getMap1Components</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => m c d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> ((d, d), [c d])<a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#getMap1Components" class="link">Source</a></p></div><div class="subs instances"><p id="control.i:Map1" class="caption collapser" onclick="toggleSection('i:Map1')">Instances</p><div id="section.i:Map1" class="show"><table><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Map1">Map1</a> <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:GLmap1">GLmap1</a></td><td class="doc empty"> </td></tr></table></div></div></div><div class="top"><p class="src"><span class="keyword">data</span> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => <a name="t:GLmap1" class="def">GLmap1</a> c d <a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#GLmap1" class="link">Source</a></p><div class="subs instances"><p id="control.i:GLmap1" class="caption collapser" onclick="toggleSection('i:GLmap1')">Instances</p><div id="section.i:GLmap1" class="show"><table><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Map1">Map1</a> <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:GLmap1">GLmap1</a></td><td class="doc empty"> </td></tr><tr><td class="src">(<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Eq.html#t:Eq">Eq</a> d, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c) => <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Eq.html#t:Eq">Eq</a> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:GLmap1">GLmap1</a> c d)</td><td class="doc empty"> </td></tr><tr><td class="src">(<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Ord.html#t:Ord">Ord</a> d, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c) => <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Ord.html#t:Ord">Ord</a> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:GLmap1">GLmap1</a> c d)</td><td class="doc empty"> </td></tr><tr><td class="src">(<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Text-Show.html#t:Show">Show</a> d, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c) => <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Text-Show.html#t:Show">Show</a> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:GLmap1">GLmap1</a> c d)</td><td class="doc empty"> </td></tr></table></div></div></div><div class="top"><p class="src"><a name="v:map1" class="def">map1</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Map1">Map1</a> m, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a> (<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Maybe.html#t:Maybe">Maybe</a> (m c d))<a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#map1" class="link">Source</a></p></div><h2 id="g:4">Two-dimensional Evaluator Maps
</h2><div class="top"><p class="src"><span class="keyword">class</span> <a name="t:Map2" class="def">Map2</a> m <span class="keyword">where</span><a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#Map2" class="link">Source</a></p><div class="subs methods"><p class="caption">Methods</p><p class="src"><a name="v:withNewMap2" class="def">withNewMap2</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:MapDescriptor">MapDescriptor</a> d -> <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:MapDescriptor">MapDescriptor</a> d -> (<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Foreign-Ptr.html#t:Ptr">Ptr</a> d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a>) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> (m c d)<a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#withNewMap2" class="link">Source</a></p><p class="src"><a name="v:withMap2" class="def">withMap2</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => m c d -> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:MapDescriptor">MapDescriptor</a> d -> <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:MapDescriptor">MapDescriptor</a> d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Foreign-Ptr.html#t:Ptr">Ptr</a> d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> a) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> a<a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#withMap2" class="link">Source</a></p><p class="src"><a name="v:newMap2" class="def">newMap2</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => (d, d) -> (d, d) -> [[c d]] -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> (m c d)<a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#newMap2" class="link">Source</a></p><p class="src"><a name="v:getMap2Components" class="def">getMap2Components</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => m c d -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> ((d, d), (d, d), [[c d]])<a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#getMap2Components" class="link">Source</a></p></div><div class="subs instances"><p id="control.i:Map2" class="caption collapser" onclick="toggleSection('i:Map2')">Instances</p><div id="section.i:Map2" class="show"><table><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Map2">Map2</a> <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:GLmap2">GLmap2</a></td><td class="doc empty"> </td></tr></table></div></div></div><div class="top"><p class="src"><span class="keyword">data</span> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => <a name="t:GLmap2" class="def">GLmap2</a> c d <a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#GLmap2" class="link">Source</a></p><div class="subs instances"><p id="control.i:GLmap2" class="caption collapser" onclick="toggleSection('i:GLmap2')">Instances</p><div id="section.i:GLmap2" class="show"><table><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Map2">Map2</a> <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:GLmap2">GLmap2</a></td><td class="doc empty"> </td></tr><tr><td class="src">(<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Eq.html#t:Eq">Eq</a> d, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c) => <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Eq.html#t:Eq">Eq</a> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:GLmap2">GLmap2</a> c d)</td><td class="doc empty"> </td></tr><tr><td class="src">(<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Ord.html#t:Ord">Ord</a> d, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c) => <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Ord.html#t:Ord">Ord</a> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:GLmap2">GLmap2</a> c d)</td><td class="doc empty"> </td></tr><tr><td class="src">(<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Text-Show.html#t:Show">Show</a> d, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c) => <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Text-Show.html#t:Show">Show</a> (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:GLmap2">GLmap2</a> c d)</td><td class="doc empty"> </td></tr></table></div></div></div><div class="top"><p class="src"><a name="v:map2" class="def">map2</a> :: (<a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Map2">Map2</a> m, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:ControlPoint">ControlPoint</a> c, <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d) => <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a> (<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Maybe.html#t:Maybe">Maybe</a> (m c d))<a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#map2" class="link">Source</a></p></div><h1 id="g:5">Using Evaluator Maps
</h1><h2 id="g:6">Evaluating an Arbitrary Coordinate Value
</h2><h2 id="g:7">Using Evenly Spaced Coordinate Values
</h2><h3 id="g:8">Defining a Grid
</h3><div class="top"><p class="src"><a name="v:mapGrid1" class="def">mapGrid1</a> :: <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d => <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a> (<a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>, (d, d))<a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#mapGrid1" class="link">Source</a></p></div><div class="top"><p class="src"><a name="v:mapGrid2" class="def">mapGrid2</a> :: <a href="Graphics-Rendering-OpenGL-GL-Evaluators.html#t:Domain">Domain</a> d => <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a> ((<a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>, (d, d)), (<a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>, (d, d)))<a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#mapGrid2" class="link">Source</a></p></div><h3 id="g:9">Evaluating a Whole Mesh
</h3><div class="top"><p class="src"><a name="v:evalMesh1" class="def">evalMesh1</a> :: <a href="Graphics-Rendering-OpenGL-GL-Polygons.html#t:PolygonMode">PolygonMode</a> -> (<a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>, <a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#evalMesh1" class="link">Source</a></p></div><div class="top"><p class="src"><a name="v:evalMesh2" class="def">evalMesh2</a> :: <a href="Graphics-Rendering-OpenGL-GL-Polygons.html#t:PolygonMode">PolygonMode</a> -> (<a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>, <a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>) -> (<a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>, <a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#evalMesh2" class="link">Source</a></p></div><h3 id="g:10">Evaluating a Single Point on a Mesh
</h3><div class="top"><p class="src"><a name="v:evalPoint1" class="def">evalPoint1</a> :: <a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#evalPoint1" class="link">Source</a></p></div><div class="top"><p class="src"><a name="v:evalPoint2" class="def">evalPoint2</a> :: (<a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>, <a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:GLint">GLint</a>) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#evalPoint2" class="link">Source</a></p></div><h1 id="g:11">Normal Generation
</h1><div class="top"><p class="src"><a name="v:autoNormal" class="def">autoNormal</a> :: <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a> <a href="Graphics-Rendering-OpenGL-GL-BasicTypes.html#t:Capability">Capability</a><a href="src/Graphics-Rendering-OpenGL-GL-Evaluators.html#autoNormal" class="link">Source</a></p></div></div></div><div id="footer"><p>Produced by <a href="http://www.haskell.org/haddock/">Haddock</a> version 2.9.2</p></div></body></html>
