From d54995cad9ddf652cd2f7abb128d5d251f9454f1 Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson2@worcester.edu>
Date: Tue, 25 Oct 2022 07:25:01 -0400
Subject: projects: Update chickadee for 0.9.0 release.

---
 manuals/chickadee/Matrices.html | 51 +++++++++++++++++++++++++++++++++++++++--
 1 file changed, 49 insertions(+), 2 deletions(-)

(limited to 'manuals/chickadee/Matrices.html')

diff --git a/manuals/chickadee/Matrices.html b/manuals/chickadee/Matrices.html
index 551664d..354a9ef 100644
--- a/manuals/chickadee/Matrices.html
+++ b/manuals/chickadee/Matrices.html
@@ -131,6 +131,16 @@ equivalent to the following code:
 <dd><p>Return <code>#t</code> if <var>obj</var> is a 3x3 matrix.
 </p></dd></dl>
 
+<dl>
+<dt id="index-matrix3_003d">Procedure: <strong>matrix3=</strong> <em>m1 m2</em></dt>
+<dd><p>Return <code>#t</code> if <var>m1</var> is the same matrix as <var>m2</var>.
+</p></dd></dl>
+
+<dl>
+<dt id="index-matrix3_002dcopy">Procedure: <strong>matrix3-copy</strong> <em>matrix</em></dt>
+<dd><p>Return a new 3x3 matrix that is a copy of <var>matrix</var>.
+</p></dd></dl>
+
 <dl>
 <dt id="index-matrix3_002a">Procedure: <strong>matrix3*</strong> <em>. matrices</em></dt>
 <dd><p>Return a new 3x3 matrix containing the product of multiplying all of
@@ -171,6 +181,11 @@ matrix <var>matrix</var>.
 <p>The following procedures perform in-place, destructive updates to 3x3
 matrix objects:
 </p>
+<dl>
+<dt id="index-matrix3_002dcopy_0021">Procedure: <strong>matrix3-copy!</strong> <em>src dest</em></dt>
+<dd><p>Copy the contents of matrix <var>src</var> to <var>dest</var>.
+</p></dd></dl>
+
 <dl>
 <dt id="index-matrix3_002didentity_0021">Procedure: <strong>matrix3-identity!</strong> <em>matrix</em></dt>
 <dd><p>Modify <var>matrix</var> in-place to contain the identity matrix.
@@ -246,6 +261,16 @@ equivalent to the following code:
 <dd><p>Return <code>#t</code> if <var>obj</var> is a 4x4 matrix.
 </p></dd></dl>
 
+<dl>
+<dt id="index-matrix4_003d">Procedure: <strong>matrix4=</strong> <em>m1 m2</em></dt>
+<dd><p>Return <code>#t</code> if <var>m1</var> is the same matrix as <var>m2</var>.
+</p></dd></dl>
+
+<dl>
+<dt id="index-matrix4_002dcopy">Procedure: <strong>matrix4-copy</strong> <em>matrix</em></dt>
+<dd><p>Return a new 4x4 matrix that is a copy of <var>matrix</var>.
+</p></dd></dl>
+
 <dl>
 <dt id="index-matrix4_002a">Procedure: <strong>matrix4*</strong> <em>. matrices</em></dt>
 <dd><p>Return a new 4x4 matrix containing the product of multiplying all of
@@ -254,6 +279,14 @@ the given <var>matrices</var>.
 <p>Note: Remember that matrix multiplication is <strong>not</strong> commutative!
 </p></dd></dl>
 
+<dl>
+<dt id="index-matrix4_002dinverse">Procedure: <strong>matrix4-inverse</strong> <em>matrix</em></dt>
+<dd><p>Return the inverse of <var>matrix</var>.
+</p>
+<p>A matrix multiplied by its inverse is the identity matrix, thought not
+always exactly due to the nature of floating point numbers.
+</p></dd></dl>
+
 <dl>
 <dt id="index-orthographic_002dprojection">Procedure: <strong>orthographic-projection</strong> <em>left right top bottom near far</em></dt>
 <dd>
@@ -297,6 +330,14 @@ axis defined by the quaternion <var>q</var>.
 <var>theta</var> radians.
 </p></dd></dl>
 
+<p>The following procedures perform in-place, destructive updates to 4x4
+matrix objects:
+</p>
+<dl>
+<dt id="index-matrix4_002dcopy_0021">Procedure: <strong>matrix4-copy!</strong> <em>src dest</em></dt>
+<dd><p>Copy the contents of matrix <var>src</var> to <var>dest</var>.
+</p></dd></dl>
+
 <dl>
 <dt id="index-matrix4_002didentity_0021">Procedure: <strong>matrix4-identity!</strong> <em>matrix</em></dt>
 <dd><p>Modify <var>matrix</var> in-place to contain the identity matrix.
@@ -308,6 +349,12 @@ axis defined by the quaternion <var>q</var>.
 the result in the 4x4 matrix <var>dest</var>.
 </p></dd></dl>
 
+<dl>
+<dt id="index-matrix4_002dinverse_0021">Procedure: <strong>matrix4-inverse!</strong> <em>matrix target</em></dt>
+<dd><p>Compute the inverse of <var>matrix</var> and store the result in
+<var>target</var>.
+</p></dd></dl>
+
 <dl>
 <dt id="index-matrix4_002dtranslate_0021">Procedure: <strong>matrix4-translate!</strong> <em>matrix x</em></dt>
 <dd><p>Modify <var>matrix</var> in-place to contain a translation by <var>x</var>, a 2D
@@ -334,12 +381,12 @@ axis defined by the quaternion <var>q</var>.
 </p></dd></dl>
 
 <dl>
-<dt id="index-matrix4_002d2d_002dtransform_0021">Procedure: <strong>matrix4-2d-transform!</strong> <em>matrix [#:origin]                                          [#:position] [#:rotation]                                          [#:scale] [#:skew]</em></dt>
+<dt id="index-matrix4_002d2d_002dtransform_0021">Procedure: <strong>matrix4-2d-transform!</strong> <em>matrix [#:origin]                                          [#:position] [#:rotation]                                          [#:scale] [#:shear]</em></dt>
 <dd>
 <p>Modify <var>matrix</var> in-place to contain the transformation described
 by <var>position</var>, a 2D vector or rectangle, <var>rotation</var>, a scalar
 representing a rotation about the Z axis, <var>scale</var>, a 2D vector,
-and <var>skew</var>, a 2D vector.  The transformation happens with respect
+and <var>shear</var>, a 2D vector.  The transformation happens with respect
 to <var>origin</var>, a 2D vector.  If an argument is not provided, that
 particular transformation will not be included in the result.
 </p></dd></dl>
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