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<h1 class="page">Next Generation Particles - Reference</h1>
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>The Parameters for a ParticleController are:</p>
</div>
<table class="tableblock frame-all grid-all stretch">
<colgroup>
<col style="width: 50%;">
<col style="width: 50%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">name</th>
<th class="tableblock halign-left valign-top">The name to use for the geometry in the scene graph</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>mesh</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>The mesh to use (Usually either PointMesh or QuadMesh)</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>maxParticles</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>The maximum number of particles to allow active at any one time</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>lifeMin</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>The minimum amount of time (in seconds) for which each particle lives</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>lifeMax</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>The maximum amount of time (in seconds) for which each particle lives</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>source</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>The source from which the particles are spawned</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>emissionController</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>The frequency and timing with which particles are spawned. If null then no particles are automatically spawned and they must be triggered manually using emitNextParticle() or emitAllParticles()</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>influencers</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Zero or more ParticleInfluencers, each of which changes the behaviour of the particles.</p>
</div></div></td>
</tr>
</tbody>
</table>
<div class="paragraph">
<p>All of the following classes have defined Interfaces or Abstract Classes to allow custom implementations and behaviour to easily be plugged into the system.</p>
</div>
<div class="paragraph">
<p>Javadoc for the system can be found at <a href="http://www.zero-separation.com/particles/javadoc">http://www.zero-separation.com/particles/javadoc</a></p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="mesh"><a class="anchor" href="#mesh"></a>Mesh</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The Mesh options are:</p>
</div>
<table class="tableblock frame-all grid-all stretch">
<colgroup>
<col style="width: 50%;">
<col style="width: 50%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">PointMesh</th>
<th class="tableblock halign-left valign-top">Fastest and most efficient, but also most limited</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>QuadMesh</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Much more flexible than point mesh, all particles are represented as 2-dimensional quads</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>TemplateMesh</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Allows particles to be full 3d objects, with the mesh for each particle being generated from one of any number of template meshes. This allows fully 3d particles and takes in texture co-ordinates and even (if required) vertex colours and normals from the original mesh converting them as required.</p>
</div></div></td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="sect1">
<h2 id="source"><a class="anchor" href="#source"></a>Source</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The Source options are:</p>
</div>
<table class="tableblock frame-all grid-all stretch">
<colgroup>
<col style="width: 50%;">
<col style="width: 50%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">PointSource</th>
<th class="tableblock halign-left valign-top">Generates all particles from a specific point with a random velocity. The point itself is a spatial so can be attached to the scene graph and will move with it.</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>MeshSource</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Generates all particles from a randomly selected point on the given mesh. A random triangle is selected and then the particle emitter from a random point within that triangle along the triangle&#8217;s normal vector.</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>WeightedMeshSource</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Provides the same functionality as MeshSource but weights triangles based on their relative size, larger triangles will tend to emit more particles. This provides a more even spread but uses more resources and needs to be kept updated if the mesh changes.</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>ParticleParticleSource</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Emits particles from another ParticleController. The particle is emitted from a randomly selected active particle and the new particle starts with identical velocity, rotation, etc as the particle it is being emitted from.</p>
</div></div></td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="sect1">
<h2 id="emissioncontrollers"><a class="anchor" href="#emissioncontrollers"></a>EmissionControllers</h2>
<div class="sectionbody">
<table class="tableblock frame-all grid-all stretch">
<colgroup>
<col style="width: 50%;">
<col style="width: 50%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">NULL</th>
<th class="tableblock halign-left valign-top">The NULL EmissionController does not automatically emit any particles, they must be emitted externally by a call to the ParticleController emitNextParticle() or emitAllParticles(). Note that if the ParticleController is not in use for an extended period of time it is recommended that to save resources you pause it by either disabling the controller or removing the Geometry from the scene graph.</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>RegularEmission</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>This EmissionController just emits particles at regular intervals, it will emit multiple particles in one frame if more than one interval has passed since the previous frame.</p>
</div></div></td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="sect1">
<h2 id="influencers"><a class="anchor" href="#influencers"></a>Influencers</h2>
<div class="sectionbody">
<table class="tableblock frame-all grid-all stretch">
<colgroup>
<col style="width: 50%;">
<col style="width: 50%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">ColorInfluencer</th>
<th class="tableblock halign-left valign-top">Modify the particle&#8217;s color over time</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>GravityInfluencer</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Apply steady acceleration in a specified direction over time</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>MultiColorInfluencer</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Modify the particle&#8217;s color through multiple colors over time</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>PreferredDestinationInfluencer</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Move the particle towards a specified point</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>PreferredDirectionInfluencer</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Rotate the particles velocity towards the given direction over time</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>RandomImpulseInfluencer</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Apply a random impulse to the particle either at initialization or every frame</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>RandomSpriteInfluencer</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Select a random sprite for the particle from those available when it is initialized</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>RotationInfluencer</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Rotate the particle by picking an initial rotational velocity at random and then maintaining it</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>SizeInfluencer</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Modify the particle&#8217;s size over time</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>SpatialDestinationInfluencer</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Move the particle towards a given spatial, it will attempt to reach the current location of the spatial by the end of the particle&#8217;s life cycle.</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>SpeedInfluencer</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Modify the particle&#8217;s speed over time</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>SpriteAnimationInfluencer</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Animate the particle through the available sprites over time</p>
</div></div></td>
</tr>
</tbody>
</table>
</div>
</div>
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