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| author | David Thompson <dthompson@vistahigherlearning.com> | 2019-06-04 20:49:16 -0400 |
|---|---|---|
| committer | David Thompson <dthompson@vistahigherlearning.com> | 2019-06-04 20:49:16 -0400 |
| commit | 279f17ac0e1b3d019c2b294098e834d249376686 (patch) | |
| tree | 47be849d3b35635d167e00cd8448815a75167a23 /manuals/chickadee/Easings.html | |
| parent | 7b808b9268ec735a7a176d10bf1887b3fa66d13e (diff) | |
Update chickadee manual.
Diffstat (limited to 'manuals/chickadee/Easings.html')
| -rw-r--r-- | manuals/chickadee/Easings.html | 47 |
1 files changed, 29 insertions, 18 deletions
diff --git a/manuals/chickadee/Easings.html b/manuals/chickadee/Easings.html index 55f385c..14207d0 100644 --- a/manuals/chickadee/Easings.html +++ b/manuals/chickadee/Easings.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 David Thompson davet@gnu.org +<!-- Copyright (C) 2017, 2018, 2019 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 @@ -13,6 +13,8 @@ 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). --> @@ -96,72 +98,81 @@ Next: <a href="Bezier-Curves.html#Bezier-Curves" accesskey="n" rel="next">Bezier <a name="Easings-1"></a> <h4 class="subsection">2.2.7 Easings</h4> +<p>Easing functions are essential for animation. Each easing function +provides a different path to go from an initial value to a final +value. These functions make an excellent companion to the +<code>tween</code> procedure (see <a href="Tweening.html#Tweening">Tweening</a>). Experiment with them to +figure out which function makes an animation look the best. +</p> +<p>Pro tip: <code>smoothstep</code> provides nice results most of the time and +creates smoother animation than using <code>linear</code>. +</p> <dl> -<dt><a name="index-linear"></a>Procedure: <strong>linear</strong> <em><var>t</var></em></dt> +<dt><a name="index-linear"></a>Procedure: <strong>linear</strong> <em>t</em></dt> </dl> <dl> -<dt><a name="index-smoothstep"></a>Procedure: <strong>smoothstep</strong> <em><var>t</var></em></dt> +<dt><a name="index-smoothstep"></a>Procedure: <strong>smoothstep</strong> <em>t</em></dt> </dl> <dl> -<dt><a name="index-ease_002din_002dquad"></a>Procedure: <strong>ease-in-quad</strong> <em><var>t</var></em></dt> +<dt><a name="index-ease_002din_002dquad"></a>Procedure: <strong>ease-in-quad</strong> <em>t</em></dt> </dl> <dl> -<dt><a name="index-ease_002dout_002dquad"></a>Procedure: <strong>ease-out-quad</strong> <em><var>t</var></em></dt> +<dt><a name="index-ease_002dout_002dquad"></a>Procedure: <strong>ease-out-quad</strong> <em>t</em></dt> </dl> <dl> -<dt><a name="index-ease_002din_002dout_002dquad"></a>Procedure: <strong>ease-in-out-quad</strong> <em><var>t</var></em></dt> +<dt><a name="index-ease_002din_002dout_002dquad"></a>Procedure: <strong>ease-in-out-quad</strong> <em>t</em></dt> </dl> <dl> -<dt><a name="index-ease_002din_002dcubic"></a>Procedure: <strong>ease-in-cubic</strong> <em><var>t</var></em></dt> +<dt><a name="index-ease_002din_002dcubic"></a>Procedure: <strong>ease-in-cubic</strong> <em>t</em></dt> </dl> <dl> -<dt><a name="index-ease_002dout_002dcubic"></a>Procedure: <strong>ease-out-cubic</strong> <em><var>t</var></em></dt> +<dt><a name="index-ease_002dout_002dcubic"></a>Procedure: <strong>ease-out-cubic</strong> <em>t</em></dt> </dl> <dl> -<dt><a name="index-ease_002din_002dout_002dcubic"></a>Procedure: <strong>ease-in-out-cubic</strong> <em><var>t</var></em></dt> +<dt><a name="index-ease_002din_002dout_002dcubic"></a>Procedure: <strong>ease-in-out-cubic</strong> <em>t</em></dt> </dl> <dl> -<dt><a name="index-ease_002din_002dquart"></a>Procedure: <strong>ease-in-quart</strong> <em><var>t</var></em></dt> +<dt><a name="index-ease_002din_002dquart"></a>Procedure: <strong>ease-in-quart</strong> <em>t</em></dt> </dl> <dl> -<dt><a name="index-ease_002dout_002dquart"></a>Procedure: <strong>ease-out-quart</strong> <em><var>t</var></em></dt> +<dt><a name="index-ease_002dout_002dquart"></a>Procedure: <strong>ease-out-quart</strong> <em>t</em></dt> </dl> <dl> -<dt><a name="index-ease_002din_002dout_002dquart"></a>Procedure: <strong>ease-in-out-quart</strong> <em><var>t</var></em></dt> +<dt><a name="index-ease_002din_002dout_002dquart"></a>Procedure: <strong>ease-in-out-quart</strong> <em>t</em></dt> </dl> <dl> -<dt><a name="index-ease_002din_002dquint"></a>Procedure: <strong>ease-in-quint</strong> <em><var>t</var></em></dt> +<dt><a name="index-ease_002din_002dquint"></a>Procedure: <strong>ease-in-quint</strong> <em>t</em></dt> </dl> <dl> -<dt><a name="index-ease_002dout_002dquint"></a>Procedure: <strong>ease-out-quint</strong> <em><var>t</var></em></dt> +<dt><a name="index-ease_002dout_002dquint"></a>Procedure: <strong>ease-out-quint</strong> <em>t</em></dt> </dl> <dl> -<dt><a name="index-ease_002din_002dout_002dquint"></a>Procedure: <strong>ease-in-out-quint</strong> <em><var>t</var></em></dt> +<dt><a name="index-ease_002din_002dout_002dquint"></a>Procedure: <strong>ease-in-out-quint</strong> <em>t</em></dt> </dl> <dl> -<dt><a name="index-ease_002din_002dsine"></a>Procedure: <strong>ease-in-sine</strong> <em><var>t</var></em></dt> +<dt><a name="index-ease_002din_002dsine"></a>Procedure: <strong>ease-in-sine</strong> <em>t</em></dt> </dl> <dl> -<dt><a name="index-ease_002dout_002dsine"></a>Procedure: <strong>ease-out-sine</strong> <em><var>t</var></em></dt> +<dt><a name="index-ease_002dout_002dsine"></a>Procedure: <strong>ease-out-sine</strong> <em>t</em></dt> </dl> <dl> -<dt><a name="index-ease_002din_002dout_002dsine"></a>Procedure: <strong>ease-in-out-sine</strong> <em><var>t</var></em></dt> +<dt><a name="index-ease_002din_002dout_002dsine"></a>Procedure: <strong>ease-in-out-sine</strong> <em>t</em></dt> </dl> |