<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <!-- Generated by HsColour, http://www.cs.york.ac.uk/fp/darcs/hscolour/ --> <title>Graphics/Rendering/OpenGL/GL/PrimitiveMode.hs</title> <link type='text/css' rel='stylesheet' href='hscolour.css' /> </head> <body> <pre><a name="line-1"></a><span class='hs-comment'>-- #hide</span> <a name="line-2"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-3"></a><span class='hs-comment'>-- |</span> <a name="line-4"></a><span class='hs-comment'>-- Module : Graphics.Rendering.OpenGL.GL.PrimitiveMode</span> <a name="line-5"></a><span class='hs-comment'>-- Copyright : (c) Sven Panne 2002-2009</span> <a name="line-6"></a><span class='hs-comment'>-- License : BSD-style (see the file libraries/OpenGL/LICENSE)</span> <a name="line-7"></a><span class='hs-comment'>-- </span> <a name="line-8"></a><span class='hs-comment'>-- Maintainer : sven.panne@aedion.de</span> <a name="line-9"></a><span class='hs-comment'>-- Stability : stable</span> <a name="line-10"></a><span class='hs-comment'>-- Portability : portable</span> <a name="line-11"></a><span class='hs-comment'>--</span> <a name="line-12"></a><span class='hs-comment'>-- This is a purely internal module for (un-)marshaling PrimitiveMode.</span> <a name="line-13"></a><span class='hs-comment'>--</span> <a name="line-14"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-15"></a> <a name="line-16"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>OpenGL</span><span class='hs-varop'>.</span><span class='hs-conid'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>PrimitiveMode</span> <span class='hs-layout'>(</span> <a name="line-17"></a> <span class='hs-conid'>PrimitiveMode</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'>marshalPrimitiveMode</span><span class='hs-layout'>,</span> <span class='hs-varid'>unmarshalPrimitiveMode</span> <a name="line-18"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-19"></a> <a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>OpenGL</span><span class='hs-varop'>.</span><span class='hs-conid'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>BasicTypes</span> <span class='hs-layout'>(</span> <span class='hs-conid'>GLenum</span> <span class='hs-layout'>)</span> <a name="line-21"></a> <a name="line-22"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-23"></a> <a name="line-24"></a><span class='hs-comment'>-- | Specification of the way the vertices given during 'renderPrimitive' are</span> <a name="line-25"></a><span class='hs-comment'>-- interpreted. In the description of the constructors, /n/ is an integer count</span> <a name="line-26"></a><span class='hs-comment'>-- starting at one, and /N/ is the total number of vertices specified.</span> <a name="line-27"></a> <a name="line-28"></a><a name="PrimitiveMode"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>PrimitiveMode</span> <span class='hs-keyglyph'>=</span> <a name="line-29"></a> <span class='hs-conid'>Points</span> <a name="line-30"></a> <span class='hs-comment'>-- ^ Treats each vertex as a single point. Vertex /n/ defines point /n/.</span> <a name="line-31"></a> <span class='hs-comment'>-- /N/ points are drawn.</span> <a name="line-32"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Lines</span> <a name="line-33"></a> <span class='hs-comment'>-- ^ Treats each pair of vertices as an independent line segment. Vertices</span> <a name="line-34"></a> <span class='hs-comment'>-- 2/n/-1 and 2/n/ define line /n/. /N/\/2 lines are drawn.</span> <a name="line-35"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LineLoop</span> <a name="line-36"></a> <span class='hs-comment'>-- ^ Draws a connected group of line segments from the first vertex to the</span> <a name="line-37"></a> <span class='hs-comment'>-- last, then back to the first. Vertices /n/ and /n/+1 define line /n/.</span> <a name="line-38"></a> <span class='hs-comment'>-- The last line, however, is defined by vertices /N/ and 1. /N/ lines</span> <a name="line-39"></a> <span class='hs-comment'>-- are drawn.</span> <a name="line-40"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LineStrip</span> <a name="line-41"></a> <span class='hs-comment'>-- ^ Draws a connected group of line segments from the first vertex to the</span> <a name="line-42"></a> <span class='hs-comment'>-- last. Vertices /n/ and /n/+1 define line /n/. /N/-1 lines are drawn.</span> <a name="line-43"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Triangles</span> <a name="line-44"></a> <span class='hs-comment'>-- ^ Treats each triplet of vertices as an independent triangle. Vertices</span> <a name="line-45"></a> <span class='hs-comment'>-- /3n-2/, /3n-1/, and /3n/ define triangle /n/. /N\/3/ triangles are drawn.</span> <a name="line-46"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>TriangleStrip</span> <a name="line-47"></a> <span class='hs-comment'>-- ^ Draws a connected group of triangles. One triangle is defined for each</span> <a name="line-48"></a> <span class='hs-comment'>-- vertex presented after the first two vertices. For odd /n/, vertices</span> <a name="line-49"></a> <span class='hs-comment'>-- /n/, /n/+1, and /n/+2 define triangle /n/. For even /n/, vertices /n/+1,</span> <a name="line-50"></a> <span class='hs-comment'>-- /n/, and /n/+2 define triangle /n/. /N/-2 triangles are drawn.</span> <a name="line-51"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>TriangleFan</span> <a name="line-52"></a> <span class='hs-comment'>-- ^ Draws a connected group of triangles. One triangle is defined for each</span> <a name="line-53"></a> <span class='hs-comment'>-- vertex presented after the first two vertices. Vertices 1, /n/+1, and</span> <a name="line-54"></a> <span class='hs-comment'>-- /n/+2 define triangle /n/. /N/-2 triangles are drawn.</span> <a name="line-55"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Quads</span> <a name="line-56"></a> <span class='hs-comment'>-- ^ Treats each group of four vertices as an independent quadrilateral.</span> <a name="line-57"></a> <span class='hs-comment'>-- Vertices 4/n/-3, 4/n/-2, 4/n/-1, and 4/n/ define quadrilateral /n/.</span> <a name="line-58"></a> <span class='hs-comment'>-- /N/\/4 quadrilaterals are drawn.</span> <a name="line-59"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>QuadStrip</span> <a name="line-60"></a> <span class='hs-comment'>-- ^ Draws a connected group of quadrilaterals. One quadrilateral is</span> <a name="line-61"></a> <span class='hs-comment'>--defined for each pair of vertices presented after the first pair.</span> <a name="line-62"></a> <span class='hs-comment'>-- Vertices 2/n/-1, 2/n/, 2/n/+2, and 2/n/+1 define quadrilateral /n/.</span> <a name="line-63"></a> <span class='hs-comment'>-- /N/\/2-1 quadrilaterals are drawn. Note that the order in which vertices</span> <a name="line-64"></a> <span class='hs-comment'>-- are used to construct a quadrilateral from strip data is different from</span> <a name="line-65"></a> <span class='hs-comment'>-- that used with independent data.</span> <a name="line-66"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Polygon</span> <a name="line-67"></a> <span class='hs-comment'>-- ^ Draws a single, convex polygon. Vertices 1 through /N/ define this</span> <a name="line-68"></a> <span class='hs-comment'>-- polygon.</span> <a name="line-69"></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-70"></a> <a name="line-71"></a><a name="marshalPrimitiveMode"></a><span class='hs-definition'>marshalPrimitiveMode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PrimitiveMode</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <a name="line-72"></a><span class='hs-definition'>marshalPrimitiveMode</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-73"></a> <span class='hs-conid'>Points</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x0</span> <a name="line-74"></a> <span class='hs-conid'>Lines</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x1</span> <a name="line-75"></a> <span class='hs-conid'>LineLoop</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x2</span> <a name="line-76"></a> <span class='hs-conid'>LineStrip</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x3</span> <a name="line-77"></a> <span class='hs-conid'>Triangles</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x4</span> <a name="line-78"></a> <span class='hs-conid'>TriangleStrip</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x5</span> <a name="line-79"></a> <span class='hs-conid'>TriangleFan</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x6</span> <a name="line-80"></a> <span class='hs-conid'>Quads</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x7</span> <a name="line-81"></a> <span class='hs-conid'>QuadStrip</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x8</span> <a name="line-82"></a> <span class='hs-conid'>Polygon</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x9</span> <a name="line-83"></a> <a name="line-84"></a><a name="unmarshalPrimitiveMode"></a><span class='hs-definition'>unmarshalPrimitiveMode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PrimitiveMode</span> <a name="line-85"></a><span class='hs-definition'>unmarshalPrimitiveMode</span> <span class='hs-varid'>x</span> <a name="line-86"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Points</span> <a name="line-87"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x1</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Lines</span> <a name="line-88"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x2</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LineLoop</span> <a name="line-89"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x3</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LineStrip</span> <a name="line-90"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x4</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Triangles</span> <a name="line-91"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x5</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TriangleStrip</span> <a name="line-92"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x6</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TriangleFan</span> <a name="line-93"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x7</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Quads</span> <a name="line-94"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x8</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>QuadStrip</span> <a name="line-95"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x9</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Polygon</span> <a name="line-96"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-layout'>(</span><span class='hs-str'>"unmarshalPrimitiveMode: illegal value "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> </pre></body> </html>
