<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" type="topic" id="tech-clutter" xml:lang="ca">

  <info>

    <link type="guide" xref="tech" group="clutter"/>

    <revision pkgversion="3.0" date="2011-04-05" status="incomplete"/>

    <credit type="author copyright">

      <name>Shaun McCance</name>

      <email its:translate="no">shaunm@gnome.org</email>

      <years>2011–2012</years>

    </credit>

    <include xmlns="http://www.w3.org/2001/XInclude" href="cc-by-sa-3-0.xml"/>

    <desc>Animations and scene graph</desc>

  </info>

<title>Clutter</title>

Clutter is a library for doing animations and using a 2.5-D canvas.

You create graphical objects out of images, and you can manipulate

them later to move them, rotate them, or give them quasi-3D

effects.

La Clutter utilitza l'API estàndard industrial <link href="http://www.khronos.org/opengl/">OpenGL</link> i <link href="http://www.khronos.org/opengles/">OpenGL|ES</link> per accedir a l'acceleració de gràfics per maquinari tan en entorns d'escriptori com de mòbil i tot això sense haver d'exposar les complexitats de la programació per GPU.

Clutter does not specify any visual style, and does not provide any

pre-defined complex user interface control; it lets the developer define what

is needed, using a flexible scene graph API, with free-form placement of the

scene elements (or actors) on the main viewport (or stage).

  
Clutter comes with pre-defined actors for displaying solid colors, image

  data, text and custom high-precision 2D drawing using the

  <link xref="tech-cairo">Cairo</link> API. Clutter also provides generic

  classes for structuring a user interface using both a box-packing model like

  <link xref="tech-gtk">GTK+</link>, and a series of free-form

  constraints.

Clutter provides an extensible animation framework and graphical

effects. An animation is associated with a timeline and changes one or

more properties of one or more actors over time, for example their

rotation in a particular dimension, scale, size, opacity, etc.

Ja hi ha una colla de biblioteques que permeten integrar-la amb altres tecnologies, com ara: la Clutter-GTK per incrustar un escenari de Clutter a dintre una aplicació de GTK+, la Clutter-GStreamer per incrustar conductes de vídeos i àudios de GStreamer, la Clutter-Box2D i la Clutter-Bullet per afegir interaccions físiques en entorns tant en 2D com en 3D.

<list style="compact">

  <item>
<link href="https://developer.gnome.org/clutter-cookbook/stable/">The Clutter Cookbook</link>
</item>

  <item>
<link href="http://developer.gnome.org/clutter/stable">Clutter Reference Manual</link>
</item>

  <item>
<link href="http://www.clutter-project.org">The Clutter web site</link>
</item>

</list>

</page>