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<title>Graphics/Gloss/Interface/Pure/Game.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE ExplicitForAll #-}</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='hs-comment'>-- We export this stuff separately so we don't clutter up the </span>
<a name="line-4"></a><span class='hs-comment'>-- API of the Graphics.Gloss module.</span>
<a name="line-5"></a>
<a name="line-6"></a><span class='hs-comment'>-- | This game mode lets you manage your own input. Pressing ESC will still abort the program,</span>
<a name="line-7"></a><span class='hs-comment'>-- but you don't get automatic pan and zoom controls like with `displayInWindow`.</span>
<a name="line-8"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Interface</span><span class='hs-varop'>.</span><span class='hs-conid'>Pure</span><span class='hs-varop'>.</span><span class='hs-conid'>Game</span>
<a name="line-9"></a> <span class='hs-layout'>(</span> <span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Display</span>
<a name="line-10"></a> <span class='hs-layout'>,</span> <span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Picture</span>
<a name="line-11"></a> <span class='hs-layout'>,</span> <span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Color</span>
<a name="line-12"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>play</span>
<a name="line-13"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Event</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'>Key</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'>SpecialKey</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'>MouseButton</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'>KeyState</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'>Modifiers</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-14"></a><span class='hs-keyword'>where</span>
<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Display</span>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Picture</span>
<a name="line-17"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Color</span>
<a name="line-18"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Internals</span><span class='hs-varop'>.</span><span class='hs-conid'>Interface</span><span class='hs-varop'>.</span><span class='hs-conid'>Game</span>
<a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Internals</span><span class='hs-varop'>.</span><span class='hs-conid'>Interface</span><span class='hs-varop'>.</span><span class='hs-conid'>Backend</span>
<a name="line-20"></a>
<a name="line-21"></a>
<a name="line-22"></a><a name="play"></a><span class='hs-comment'>-- | Play a game in a window. </span>
<a name="line-23"></a><span class='hs-definition'>play</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>world</span>
<a name="line-24"></a> <span class='hs-varop'>.</span> <span class='hs-conid'>Display</span> <span class='hs-comment'>-- ^ Display mode.</span>
<a name="line-25"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Color</span> <span class='hs-comment'>-- ^ Background color.</span>
<a name="line-26"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ Number of simulation steps to take for each second of real time.</span>
<a name="line-27"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>world</span> <span class='hs-comment'>-- ^ The initial world.</span>
<a name="line-28"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>world</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ A function to convert the world a picture.</span>
<a name="line-29"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Event</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>world</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>world</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ A function to handle input events.</span>
<a name="line-30"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>world</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>world</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ A function to step the world one iteration.</span>
<a name="line-31"></a> <span class='hs-comment'>-- It is passed the period of time (in seconds) needing to be advanced.</span>
<a name="line-32"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-33"></a>
<a name="line-34"></a><span class='hs-definition'>play</span> <span class='hs-varid'>display</span> <span class='hs-varid'>backColor</span> <span class='hs-varid'>simResolution</span>
<a name="line-35"></a> <span class='hs-varid'>worldStart</span> <span class='hs-varid'>worldToPicture</span> <span class='hs-varid'>worldHandleEvent</span> <span class='hs-varid'>worldAdvance</span>
<a name="line-36"></a>
<a name="line-37"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>playWithBackendIO</span> <span class='hs-varid'>defaultBackendState</span>
<a name="line-38"></a> <span class='hs-varid'>display</span> <span class='hs-varid'>backColor</span> <span class='hs-varid'>simResolution</span>
<a name="line-39"></a> <span class='hs-varid'>worldStart</span>
<a name="line-40"></a> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>worldToPicture</span><span class='hs-layout'>)</span>
<a name="line-41"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>event</span> <span class='hs-varid'>world</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>worldHandleEvent</span> <span class='hs-varid'>event</span> <span class='hs-varid'>world</span><span class='hs-layout'>)</span>
<a name="line-42"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>time</span> <span class='hs-varid'>world</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>worldAdvance</span> <span class='hs-varid'>time</span> <span class='hs-varid'>world</span><span class='hs-layout'>)</span>
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