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diff --git a/manuals/chickadee/Live-Coding.html b/manuals/chickadee/Live-Coding.html new file mode 100644 index 0000000..167c87a --- /dev/null +++ b/manuals/chickadee/Live-Coding.html @@ -0,0 +1,127 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 2017-2020 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. + + +* Chickadee: (chickadee). Game programming toolkit for Guile. + +The document was typeset with +http://www.texinfo.org/ (GNU Texinfo). + --> +<!-- Created by GNU Texinfo 6.6, http://www.gnu.org/software/texinfo/ --> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> +<title>Live Coding (The Chickadee Game Toolkit)</title> + +<meta name="description" content="Live Coding (The Chickadee Game Toolkit)"> +<meta name="keywords" content="Live Coding (The Chickadee Game Toolkit)"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<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="Kernel.html#Kernel" rel="up" title="Kernel"> +<link href="Math.html#Math" rel="next" title="Math"> +<link href="Window-Manipulation.html#Window-Manipulation" rel="prev" title="Window Manipulation"> +<style type="text/css"> +<!-- +a.summary-letter {text-decoration: none} +blockquote.indentedblock {margin-right: 0em} +div.display {margin-left: 3.2em} +div.example {margin-left: 3.2em} +div.lisp {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} +span.nolinebreak {white-space: nowrap} +span.roman {font-family: initial; font-weight: normal} +span.sansserif {font-family: sans-serif; font-weight: normal} +ul.no-bullet {list-style: none} +@media (min-width: 1140px) { + body { + margin-left: 14rem; + margin-right: 4rem; + max-width: 52rem; + } +} + +@media (min-width: 800px) and (max-width: 1140px) { + body { + margin-left: 6rem; + margin-right: 4rem; + max-width: 52rem; + } +} + +@media (max-width: 800px) { + body { + margin: 1rem; + } +} + +--> +</style> +<link rel="stylesheet" type="text/css" href="https://dthompson.us/css/dthompson.css"> + + +</head> + +<body lang="en"> +<span id="Live-Coding"></span><div class="header"> +<p> +Previous: <a href="Window-Manipulation.html#Window-Manipulation" accesskey="p" rel="prev">Window Manipulation</a>, Up: <a href="Kernel.html#Kernel" accesskey="u" rel="up">Kernel</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> +<span id="Live-Coding-1"></span><h4 class="subsection">2.1.4 Live Coding</h4> + +<p>One of the biggest appeals of any Lisp dialect is the ability to use +the “read-eval-print loop” (REPL for short) to build programs +iteratively and interactively while the program is running. However, +programs that run in an event loop and respond to user input (such as +a video game) require special care for this workflow to be pleasant. +Chickadee provides no built-in support for live coding, but it’s +fairly easy to hook up a special kind of REPL yourself. +</p> +<p>First, create a cooperative REPL server (It’s important to use Guile’s +cooperative REPL server instead of the standard REPL server in +<code>(system repl server)</code> to avoid thread synchronization issues). +Then, in the game loop’s update procedure, call +<code>poll-coop-repl-server</code> and pass the REPL object. Here is a +template to follow: +</p> +<div class="example"> +<pre class="example">(use-modules (chickadee) + (system repl coop-server)) + +(define repl (spawn-coop-repl-server)) + +(define (update dt) + (poll-coop-repl-server repl) + ...) + +(run-game #:update update ...) +</pre></div> + +<p>To use the REPL, connect to it via port 37146. Telnet will do the +trick, but using the <a href="https://www.nongnu.org/geiser/">Geiser</a> +extension for Emacs is by far the best way to develop at the REPL with +Guile. Use <code>M-x connect-to-guile</code> to connect to the REPL server. +</p> + + + +</body> +</html> |