Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 12]

▼NParticlePlayground
CCollisionCache	The collision cache contains information of all particle collisions.
CManipulatorObjectC	Holds information about a Manipulator Object. A Manipulator can both be Global and Local and will affect all particles within range.
CManipulatorParticle	The Manipulator Particle class is a container for tracking particles in their particle system. When reaching a particle on a Manipulator the particle will convert to a PlaygroundEventParticle.
CManipulatorPropertyC	Holds information for a Manipulator Object's different property abilities.
CMathManipulatorProperty	Holds information for a Math Manipulator. This can be used to apply extensive particle behaviors, such as positioning or changing sizes using sine, cosine or linear interpolation math.
CMeshParticles
CPaintObjectC	Holds information about a Paint source.
CPaintPositionC	Constructor for a painted position.
CParticlePlaygroundTrail
CParticleProjectionC	Holds information for Source Projection.
CParticleStateC	Holds information about a State source.
CPlaybackParticle	A Playback Particle is a struct for keeping information about one single particle in a Playground Recorder's recorded data.
CPlaygroundAxisConstraintsC	Hold information for axis constraints in X-, Y- and Z-values. These contraints are used to annihilate forces on set axis.
CPlaygroundBrushC	Holds information about a brush used for source painting.
CPlaygroundC	The PlaygroundC class is the Playground Manager which runs all Particle Playground systems and is containing all Global Manipulators. The Playground Manager acts as a wrapper class for common operations and contain functions for creating and altering particle systems. You will also find the global event delegates (particleEventBirth, particleEventDeath, particleEventCollision and particleEventTime) for any particle systems broadcasting events with "Send To Manager" enabled.
CPlaygroundCache	The Playground Cache contains all data for particles in built-in arrays.
CPlaygroundColliderC	Holds information for a Playground Collider (infinite collision plane).
CPlaygroundCompression
CPlaygroundEventC	Holds information for a Playground Event.
CPlaygroundEventParticle	Holds information for a PlaygroundEventParticle. The Playground Event Particle contains detailed data upon an event and is sent towards any event listeners.
CPlaygroundFollow
CPlaygroundFollower	Playground follower class.
CPlaygroundGradientC	Contains information for a color gradient.
CPlaygroundMultiRecorder	The Particle Playground Multi Recorder enables playback and scrubbing of multiple recorded synchronized particle systems.
CPlaygroundParticlesC	The PlaygroundParticlesC class is a Particle Playground system driven by the Playground Manager (PlaygroundC). A Particle Playground system contains settings and data for altering a Shuriken component.
CPlaygroundQueue< T >	The Playground Queue class is a self-managed thread pool which consumes actions sent into EnqueueTask(Action).
CPlaygroundRecorder	The Particle Playground Recorder enables playback and scrubbing of recorded particles. The method used is storing built-in particle arrays as keyframes, then interpolate between current keyframe and next upon playback
CPlaygroundSave	Holds information for a particle system Snapshot.
CPlaygroundTrails
CPlaygroundTransformC	Wrapper class for the Transform component. This is updated outside- and read inside the multithreaded environment.
CRecordedFrame	The RecordedFrame class contain information of a single frame of recorded particles for the Playground Recorder's recorded data.
CSerializedFrame	A serialized frame holds information about one recorded frame of particles.
CSerializedParticle	A serialized particle holds information for one single serializable particle inside a recorded frame for the Playground Recorder's recorded data.
CSimplexNoise	The Simplex Noise algorithm applied in Turbulence.
CSkinnedWorldObject	Holds information about a Skinned world object. Consider to NOT use Optimize Game Objects at the skinned mesh's Import Settings for best performance of extracting its vertices.
CTrailParticleInfo	The trail particle info struct contains data about particles to be read by a Playground Trail.
CTrailPoint
CVector3AnimationCurveC	Holds AnimationCurves in X, Y and Z variables.
CWorldObject	Holds information about a World object.
CWorldObjectBaseC	Extended class for World Objects and Skinned World Objects.
▼NParticlePlaygroundLanguage
CPlaygroundLanguageC
▼NPlaygroundSplines	Collection of methods for working with splines. This is based on the great learning tutorial Curves and Splines by Jasper Flick
CPlaygroundSpline	Holds information about a spline and contains functions for working with the nodes and bezier handles.
CPlaygroundSplineMesh	The PlaygroundSplineMesh class lets you create a mesh from a Playground Spline.
CTransformNode
CExtensionObjectC
CPlaygroundBrushPresetC
CPlaygroundBrushPresetInspectorC
CPlaygroundCreateBrushWindowC
CPlaygroundCreatePresetWindowC
CPlaygroundFollowInspector
CPlaygroundHierarchyIcon
CPlaygroundInspectorC
CPlaygroundInstallLanguageWindowC
CPlaygroundParticleSystemInspectorC
CPlaygroundParticleWindowC
CPlaygroundPresetCircleShotC
CPlaygroundPresetLaserC
CPlaygroundRecorderData
CPlaygroundRecorderInspector
CPlaygroundSettingsC
CPlaygroundSplineInspector
CPlaygroundTrailsInspector
CPresetCategory
CPresetObjectC