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Diffstat (limited to 'manuals/chickadee/Grid.html')
| -rw-r--r-- | manuals/chickadee/Grid.html | 47 |
1 files changed, 18 insertions, 29 deletions
diff --git a/manuals/chickadee/Grid.html b/manuals/chickadee/Grid.html index 1b578ac..700d608 100644 --- a/manuals/chickadee/Grid.html +++ b/manuals/chickadee/Grid.html @@ -1,6 +1,6 @@ <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> -<!-- Copyright (C) 2017, 2018, 2019 David Thompson davet@gnu.org +<!-- 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 @@ -18,7 +18,7 @@ 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 6.5, http://www.gnu.org/software/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>Grid (The Chickadee Game Toolkit)</title> @@ -38,23 +38,14 @@ http://www.texinfo.org/ (GNU Texinfo). <!-- 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.nolinebreak {white-space: nowrap} span.roman {font-family: initial; font-weight: normal} span.sansserif {font-family: sans-serif; font-weight: normal} @@ -89,14 +80,12 @@ ul.no-bullet {list-style: none} </head> <body lang="en"> -<a name="Grid"></a> -<div class="header"> +<span id="Grid"></span><div class="header"> <p> Next: <a href="Matrices.html#Matrices" accesskey="n" rel="next">Matrices</a>, Previous: <a href="Rectangles.html#Rectangles" accesskey="p" rel="prev">Rectangles</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</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="Grid-1"></a> -<h4 class="subsection">2.2.4 Grid</h4> +<span id="Grid-1"></span><h4 class="subsection">2.2.4 Grid</h4> <p>The <code>(chickadee math grid)</code> module provides a simple spatial partitioning system for axis-aligned bounding boxes @@ -132,42 +121,42 @@ this filtering technique, a game can resolve collisions between different objects in different ways. </p> <dl> -<dt><a name="index-make_002dgrid"></a>Procedure: <strong>make-grid</strong> <em>[cell-size 64]</em></dt> +<dt id="index-make_002dgrid">Procedure: <strong>make-grid</strong> <em>[cell-size 64]</em></dt> <dd><p>Return a new grid partitioned into <var>cell-size</var> tiles. </p></dd></dl> <dl> -<dt><a name="index-grid_003f"></a>Procedure: <strong>grid?</strong> <em>obj</em></dt> +<dt id="index-grid_003f">Procedure: <strong>grid?</strong> <em>obj</em></dt> <dd><p>Return <code>#t</code> if <var>obj</var> is a grid. </p></dd></dl> <dl> -<dt><a name="index-cell_003f"></a>Procedure: <strong>cell?</strong> <em>obj</em></dt> +<dt id="index-cell_003f">Procedure: <strong>cell?</strong> <em>obj</em></dt> <dd><p>Return <code>#t</code> if <var>obj</var> is a grid cell. </p></dd></dl> <dl> -<dt><a name="index-cell_002dcount"></a>Procedure: <strong>cell-count</strong> <em>cell</em></dt> +<dt id="index-cell_002dcount">Procedure: <strong>cell-count</strong> <em>cell</em></dt> <dd><p>Return the number of items in <var>cell</var>. </p></dd></dl> <dl> -<dt><a name="index-grid_002dcell_002dsize"></a>Procedure: <strong>grid-cell-size</strong> <em>grid</em></dt> +<dt id="index-grid_002dcell_002dsize">Procedure: <strong>grid-cell-size</strong> <em>grid</em></dt> <dd><p>Return the cell size of <var>grid</var>. </p></dd></dl> <dl> -<dt><a name="index-grid_002dcell_002dcount"></a>Procedure: <strong>grid-cell-count</strong> <em>grid</em></dt> +<dt id="index-grid_002dcell_002dcount">Procedure: <strong>grid-cell-count</strong> <em>grid</em></dt> <dd><p>Return the number of cells currently in <var>grid</var>. </p></dd></dl> <dl> -<dt><a name="index-grid_002ditem_002dcount"></a>Procedure: <strong>grid-item-count</strong> <em>grid</em></dt> +<dt id="index-grid_002ditem_002dcount">Procedure: <strong>grid-item-count</strong> <em>grid</em></dt> <dd><p>Return the number of items in <var>grid</var>. </p></dd></dl> <dl> -<dt><a name="index-grid_002dadd"></a>Procedure: <strong>grid-add</strong> <em>grid item x y width height</em></dt> +<dt id="index-grid_002dadd">Procedure: <strong>grid-add</strong> <em>grid item x y width height</em></dt> <dd> <p>Add <var>item</var> to <var>grid</var> represented by the axis-aligned bounding box whose lower-left corner is at (<var>x</var>, <var>y</var>) and is @@ -175,17 +164,17 @@ box whose lower-left corner is at (<var>x</var>, <var>y</var>) and is </p></dd></dl> <dl> -<dt><a name="index-grid_002dremove"></a>Procedure: <strong>grid-remove</strong> <em>grid item</em></dt> +<dt id="index-grid_002dremove">Procedure: <strong>grid-remove</strong> <em>grid item</em></dt> <dd><p>Return <var>item</var> from <var>grid</var>. </p></dd></dl> <dl> -<dt><a name="index-grid_002dclear"></a>Procedure: <strong>grid-clear</strong> <em>grid</em></dt> +<dt id="index-grid_002dclear">Procedure: <strong>grid-clear</strong> <em>grid</em></dt> <dd><p>Remove all items from <var>grid</var>. </p></dd></dl> <dl> -<dt><a name="index-grid_002dmove"></a>Procedure: <strong>grid-move</strong> <em>grid item position filter</em></dt> +<dt id="index-grid_002dmove">Procedure: <strong>grid-move</strong> <em>grid item position filter</em></dt> <dd><p>Attempt to move <var>item</var> in <var>grid</var> to <var>position</var> (a 2D vector) and check for collisions. For each collision, <var>filter</var> will be called with two arguments: <var>item</var> and the item it collided @@ -194,18 +183,18 @@ resolve the colliding objects. </p></dd></dl> <dl> -<dt><a name="index-for_002deach_002dcell"></a>Procedure: <strong>for-each-cell</strong> <em>proc grid [rect]</em></dt> +<dt id="index-for_002deach_002dcell">Procedure: <strong>for-each-cell</strong> <em>proc grid [rect]</em></dt> <dd><p>Call <var>proc</var> with each cell in <var>grid</var> that intersects <var>rect</var>, or every cell if <var>rect</var> is <code>#f</code>. </p></dd></dl> <dl> -<dt><a name="index-for_002deach_002ditem"></a>Procedure: <strong>for-each-item</strong> <em>proc grid</em></dt> +<dt id="index-for_002deach_002ditem">Procedure: <strong>for-each-item</strong> <em>proc grid</em></dt> <dd><p>Call <var>proc</var> for each item in <var>grid</var>. </p></dd></dl> <dl> -<dt><a name="index-slide"></a>Procedure: <strong>slide</strong> <em>item item-rect other other-rect goal</em></dt> +<dt id="index-slide">Procedure: <strong>slide</strong> <em>item item-rect other other-rect goal</em></dt> <dd> <p>Resolve the collision that occurs between <var>item</var> and <var>other</var> when moving <var>item-rect</var> to <var>goal</var> by sliding <var>item-rect</var> |