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authorDavid Thompson <dthompson2@worcester.edu>2023-12-28 11:23:49 -0500
committerDavid Thompson <dthompson2@worcester.edu>2023-12-28 11:23:49 -0500
commit25c5eac5e6ca1035db1eddd7bea9ac78531da57e (patch)
tree96377006bbfee75bcf0ce208c1ef89cbdfa5b803 /manuals/chickadee/Viewports.html
parent5b2e467a7e5e2ffbb0cbbf2557283be891d8206b (diff)
Delete manuals!
Good riddance! These are hosted on files.dthompson.us now!
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-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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-<!-- Copyright (C) 2017-2023 David Thompson dthompson2@worcester.edu
-
-Permission is granted to copy, distribute and/or modify this document
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-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.
-
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-<title>Viewports (The Chickadee Game Toolkit)</title>
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-<meta name="description" content="Viewports (The Chickadee Game Toolkit)" />
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-<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents" />
-<link href="Graphics.html" rel="up" title="Graphics" />
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-<body lang="en">
-<span id="Viewports"></span><div class="header">
-<p>
-Next: <a href="Render-Settings.html" accesskey="n" rel="next">Render Settings</a>, Previous: <a href="Framebuffers.html" accesskey="p" rel="prev">Framebuffers</a>, Up: <a href="Graphics.html" accesskey="u" rel="up">Graphics</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html" title="Index" rel="index">Index</a>]</p>
-</div>
-<hr />
-<span id="Viewports-1"></span><h4 class="subsection">5.3.15 Viewports</h4>
-
-<p>A viewport represents a subset of the screen (or framebuffer). When
-rendering a frame, the resulting image will only appear within that
-viewport. These aren&rsquo;t often needed, and Chickadee&rsquo;s default viewport
-occupies the entire screen, but there are certain situations where
-they are useful. For example, a split-screen multiplayer game may
-render to two different viewports, each occupying a different half of
-the screen.
-</p>
-<p>The <code>(chickadee graphics viewport)</code> module provides the following
-API:
-</p>
-<dl>
-<dt id="index-make_002dviewport">Procedure: <strong>make-viewport</strong> <em>x y width height [#:clear-color] [#:clear-flags]</em></dt>
-<dd>
-<p>Create a viewport that covers an area of the window starting from
-coordinates (<var>x</var>, <var>y</var>) and spanning <var>width</var> <code>x</code>
-<var>height</var> pixels. Fill the viewport with <var>clear-color</var> when
-clearing the screen. Clear the buffers denoted by the list of symbols
-in <var>clear-flags</var>.
-</p>
-<p>Possible values for <var>clear-flags</var> are <var>color-buffer</var>,
-<var>depth-buffer</var>, <var>accum-buffer</var>, and <var>stencil-buffer</var>.
-</p></dd></dl>
-
-<dl>
-<dt id="index-viewport_003f">Procedure: <strong>viewport?</strong> <em>obj</em></dt>
-<dd><p>Return <code>#t</code> if <var>obj</var> is a viewport.
-</p></dd></dl>
-
-<dl>
-<dt id="index-viewport_002dx">Procedure: <strong>viewport-x</strong> <em>viewport</em></dt>
-<dd><p>Return the left edge of <var>viewport</var>.
-</p></dd></dl>
-
-<dl>
-<dt id="index-viewport_002dy">Procedure: <strong>viewport-y</strong> <em>viewport</em></dt>
-<dd><p>Return the bottom edge of <var>viewport</var>.
-</p></dd></dl>
-
-<dl>
-<dt id="index-viewport_002dwidth">Procedure: <strong>viewport-width</strong> <em>viewport</em></dt>
-<dd><p>Return the width of <var>viewport</var>.
-</p></dd></dl>
-
-<dl>
-<dt id="index-viewport_002dheight">Procedure: <strong>viewport-height</strong> <em>viewport</em></dt>
-<dd><p>Return the height of <var>viewport</var>.
-</p></dd></dl>
-
-<dl>
-<dt id="index-viewport_002dclear_002dcolor">Procedure: <strong>viewport-clear-color</strong> <em>viewport</em></dt>
-<dd><p>Return the clear color for <var>viewport</var>.
-</p></dd></dl>
-
-<dl>
-<dt id="index-viewport_002dclear_002dflags">Procedure: <strong>viewport-clear-flags</strong> <em>viewport</em></dt>
-<dd><p>Return the list of clear flags for <var>viewport</var>.
-</p></dd></dl>
-
-<dl>
-<dt id="index-current_002dviewport">Procedure: <strong>current-viewport</strong></dt>
-<dd><p>Return the current viewport.
-</p></dd></dl>
-
-<dl>
-<dt id="index-g_003aviewport">Variable: <strong>g:viewport</strong></dt>
-<dd><p>Render state for viewports (see <a href="Rendering-Engine.html">Rendering Engine</a>.)
-</p></dd></dl>
-
-
-
-
-</body>
-</html>