Sophie

Sophie

distrib > Mandriva > 2010.0 > i586 > media > contrib-release > by-pkgid > bad97183153701b09df5fae1052b1c30 > files > 4100

crystalspace-doc-1.2.1-5mdv2010.0.i586.rpm

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html401/loose.dtd">
<html>
<!-- Created by texi2html 1.76 -->
<!--
Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author)
            Karl Berry  <karl@freefriends.org>
            Olaf Bachmann <obachman@mathematik.uni-kl.de>
            and many others.
Maintained by: Many creative people <dev@texi2html.cvshome.org>
Send bugs and suggestions to <users@texi2html.cvshome.org>

-->
<head>
<title>Crystal Space 1.2.1: C.2.18.1 Explosion</title>

<meta name="description" content="Crystal Space 1.2.1: C.2.18.1 Explosion">
<meta name="keywords" content="Crystal Space 1.2.1: C.2.18.1 Explosion">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="texi2html 1.76">
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
pre.display {font-family: serif}
pre.format {font-family: serif}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: serif; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: serif; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.sansserif {font-family:sans-serif; font-weight:normal;}
ul.toc {list-style: none}
-->
</style>


</head>

<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">

<a name="Api1_005f0-PartConv-Explo"></a>
<a name="0"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="Api1_005f0-Particle-system-changes.html#0" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="Api1_005f0-PartConv-Rain.html#0" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="Release-Notes.html#0" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="Api1_005f0-Particle-system-changes.html#0" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Licenses.html#0" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="index.html#SEC_Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="cs_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="cs_Index.html#0" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="cs_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<hr size="1">
<h4 class="subsubsection"> C.2.18.1 Explosion </h4>

<p>To convert the old explosion particle system to new particles you
can use a sphere emitter with a very small radius and with particle
placement in center. Set a very small duration and a high emission rate
so that all particles will appear to be created at once. Using
a linear color effector you can obtain the fading of the particles (use
either alpha mixmode or add depending no the kind of fading you want).
Here is an example of how the old explosion can be emulated using
the new particle system (in code): Note that this is not an attempt to
make a realistic or even nice looking explosion. It is just an attempt
to emulate the ugly old explosion particle system from the past:
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">  // Create the factory.
  csRef&lt;iMeshFactoryWrapper&gt; mfw = engine-&gt;CreateMeshFactory (
	&quot;crystalspace.mesh.object.particles&quot;, &quot;explosion&quot;);
  if (!mfw) return;

  // Create the mesh and setup material, mixmode, and color.
  csRef&lt;iMeshWrapper&gt; exp = engine-&gt;CreateMeshWrapper (mfw, &quot;boing&quot;,
	sector, center));
  exp-&gt;SetZBufMode(CS_ZBUF_TEST);
  exp-&gt;SetRenderPriority (engine-&gt;GetAlphaRenderPriority ());
  exp-&gt;GetMeshObject()-&gt;SetMaterialWrapper (mat);
  exp-&gt;GetMeshObject()-&gt;SetMixMode (CS_FX_ALPHA);
  exp-&gt;GetMeshObject()-&gt;SetColor (csColor (1, 1, 0));

  // Find/load the built-in emitter factory. From this factory we
  // can access some of the standard built-in emitters.
  csRef&lt;iParticleBuiltinEmitterFactory&gt; emit_factory = 
      csLoadPluginCheck&lt;iParticleBuiltinEmitterFactory&gt; (
        object_reg, &quot;crystalspace.mesh.object.particles.emitter&quot;, false);
  // Find/load the built-in effector factory. From this factory we
  // can access some of the standard built-in effectors.
  csRef&lt;iParticleBuiltinEffectorFactory&gt; eff_factory = 
      csLoadPluginCheck&lt;iParticleBuiltinEffectorFactory&gt; (
        object_reg, &quot;crystalspace.mesh.object.particles.effector&quot;, false);

  // Create a sphere emitter where we will have a quick burst of
  // all the particles from the center.
  csRef&lt;iParticleBuiltinEmitterSphere&gt; sphereemit = emit_factory-&gt;
    CreateSphere ();
  sphereemit-&gt;SetRadius (0.1);
  sphereemit-&gt;SetParticlePlacement (CS_PARTICLE_BUILTIN_CENTER);
  sphereemit-&gt;SetPosition (csVector3 (0, 0, 0));
  sphereemit-&gt;SetInitialVelocity (csVector3 (1, 0, 0), csVector3 (3, 3, 3));
  sphereemit-&gt;SetUniformVelocity (false);
  sphereemit-&gt;SetDuration (0.1f);
  sphereemit-&gt;SetEmissionRate (1000.0f);
  sphereemit-&gt;SetInitialTTL (1.0f, 1.0f);

  // Create a lincolor effector to fade out the particles.
  csRef&lt;iParticleBuiltinEffectorLinColor&gt; lincol = eff_factory-&gt;
    CreateLinColor ();
  lincol-&gt;AddColor (csColor4 (1,1,1,1), 1.0f);
  lincol-&gt;AddColor (csColor4 (1,1,1,0), 0.0f);

  // Setup the real particle system and add the emitter and effector
  // we created above.
  csRef&lt;iParticleSystem&gt; partstate =
  	scfQueryInterface&lt;iParticleSystem&gt; (exp-&gt;GetMeshObject ());
  partstate-&gt;SetParticleSize (csVector2 (0.15f, 0.15f));
  partstate-&gt;SetRotationMode (CS_PARTICLE_ROTATE_VERTICES);
  partstate-&gt;SetIntegrationMode (CS_PARTICLE_INTEGRATE_BOTH);
  partstate-&gt;AddEmitter (sphereemit);
  partstate-&gt;AddEffector (lincol);

  // Make sure that the particle mesh and factories are removed
  // when all particles are gone (approx 1 second).
  Sys-&gt;Engine-&gt;DelayedRemoveObject (1100, exp);
  Sys-&gt;Engine-&gt;DelayedRemoveObject (1101, mfw);
</pre></td></tr></table>
<hr size="1">
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="Api1_005f0-Particle-system-changes.html#0" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="Api1_005f0-PartConv-Rain.html#0" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="Release-Notes.html#0" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="Api1_005f0-Particle-system-changes.html#0" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Licenses.html#0" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="index.html#SEC_Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="cs_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="cs_Index.html#0" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="cs_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<p>
 <font size="-1">
  This document was generated using <a href="http://texi2html.cvshome.org/"><em>texi2html 1.76</em></a>.
 </font>
 <br>

</p>
</body>
</html>

Perl :: Catalyst :: PostgreSQL :: RPM Valid HTML 4.01 Transitional