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diff --git a/manuals/sly/The-Game-Loop.html b/manuals/sly/The-Game-Loop.html new file mode 100644 index 0000000..f8a685d --- /dev/null +++ b/manuals/sly/The-Game-Loop.html @@ -0,0 +1,114 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 2013, 2014 David Thompson davet@gnu.org + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 +or any later version published by the Free Software Foundation; +with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. +A copy of the license is included in the section entitled "GNU +Free Documentation License". + +A copy of the license is also available from the Free Software +Foundation Web site at http://www.gnu.org/licenses/fdl.html. + + +The document was typeset with +http://www.texinfo.org/ (GNU Texinfo). + --> +<!-- Created by GNU Texinfo 6.0, http://www.gnu.org/software/texinfo/ --> +<head> +<title>Sly: The Game Loop</title> + +<meta name="description" content="Sly: The Game Loop"> +<meta name="keywords" content="Sly: The Game Loop"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<meta charset="UTF-8"> +<link href="index.html#Top" rel="start" title="Top"> +<link href="Index.html#Index" rel="index" title="Index"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="Booting.html#Booting" rel="up" title="Booting"> +<link href="Math.html#Math" rel="next" title="Math"> +<link href="Window-Creation.html#Window-Creation" rel="prev" title="Window Creation"> +<style type="text/css"> +<!-- +a.summary-letter {text-decoration: none} +blockquote.indentedblock {margin-right: 0em} +blockquote.smallindentedblock {margin-right: 0em; font-size: smaller} +blockquote.smallquotation {font-size: smaller} +div.display {margin-left: 3.2em} +div.example {margin-left: 3.2em} +div.lisp {margin-left: 3.2em} +div.smalldisplay {margin-left: 3.2em} +div.smallexample {margin-left: 3.2em} +div.smalllisp {margin-left: 3.2em} +kbd {font-style: oblique} +pre.display {font-family: inherit} +pre.format {font-family: inherit} +pre.menu-comment {font-family: serif} +pre.menu-preformatted {font-family: serif} +pre.smalldisplay {font-family: inherit; font-size: smaller} +pre.smallexample {font-size: smaller} +pre.smallformat {font-family: inherit; font-size: smaller} +pre.smalllisp {font-size: smaller} +span.nocodebreak {white-space: nowrap} +span.nolinebreak {white-space: nowrap} +span.roman {font-family: serif; font-weight: normal} +span.sansserif {font-family: sans-serif; font-weight: normal} +ul.no-bullet {list-style: none} +--> +</style> + + +</head> + +<body lang="en"> +<a name="The-Game-Loop"></a> +<div class="header"> +<p> +Previous: <a href="Window-Creation.html#Window-Creation" accesskey="p" rel="prev">Window Creation</a>, Up: <a href="Booting.html#Booting" accesskey="u" rel="up">Booting</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p> +</div> +<hr> +<a name="The-Game-Loop-1"></a> +<h4 class="subsection">4.1.2 The Game Loop</h4> + +<dl> +<dt><a name="index-draw_002dhook"></a>Scheme Variable: <strong>draw-hook</strong></dt> +<dd><p>This hook is run every time the game loop wants to render. Procedures +added to this hook should accept two arguments: <code>dt</code>, the time in +seconds since the last render call; and <code>alpha</code>, a number in the +range [0,1] that indicates how far in between two discrete updates of +the game state the loop is in. The <code>alpha</code> value is important +for smoothing animated values to avoid the “temporal aliasing” +effect that causes choppy looking animations. +</p></dd></dl> + +<dl> +<dt><a name="index-after_002dgame_002dloop_002derror_002dhook"></a>Scheme Variable: <strong>after-game-loop-error-hook</strong></dt> +<dd><p>This hook is run every time the game loop catches an error. +Procedures added to this hook should accept no arguments. +</p></dd></dl> + +<dl> +<dt><a name="index-run_002dgame_002dloop"></a>Scheme Procedure: <strong>run-game-loop</strong> <em>[<var>#:frame-rate</var>] [<var>#:tick-rate</var>] [<var>#:max-ticks-per-frame</var>]</em></dt> +<dd><p>Start the game loop. <code>frame-rate</code> specifies the optimal number +of frames to draw per second. <code>tick-rate</code> specifies the optimal +game logic updates per second. Both <code>frame-rate</code> and +<code>tick-rate</code> are 60 by default. <code>max-ticks-per-frame</code> is the +maximum number of times the game loop will update game state in a +single frame. When this upper bound is reached due to poor +performance, the game will start to slow down instead of becoming +completely unresponsive and possibly crashing. +</p></dd></dl> + +<dl> +<dt><a name="index-stop_002dgame_002dloop"></a>Scheme Procedure: <strong>stop-game-loop</strong></dt> +<dd><p>Abort the game loop. +</p></dd></dl> + + + +</body> +</html> |