xiiParticleAttributeSemantic Struct Reference

Built-in particle attribute semantics. Custom attributes are named by xiiParticleGraphPinDesc::m_sAttributeName. More...

#include <ParticleGraph.h>

Inheritance diagram for xiiParticleAttributeSemantic:

Public Types
enum	Enum : StorageType {   Custom = 0U , Position , PreviousPosition , Velocity ,   Acceleration , Mass , InverseMass , Radius ,   Color , Age , Lifetime , Orientation ,   AngularVelocity , Temperature , Density , Charge ,   MoleculeId , CellId , SortKey , ENUM_COUNT ,   Default = Custom }
using	StorageType = xiiUInt8

Detailed Description

Built-in particle attribute semantics. Custom attributes are named by xiiParticleGraphPinDesc::m_sAttributeName.

Member Enumeration Documentation

Enum

enum xiiParticleAttributeSemantic::Enum : StorageType

Enumerator
Custom	Custom attribute with user-defined name.
Position	Particle position in simulation space.
PreviousPosition	Particle position in the previous simulation step, used for integration and collision.
Velocity	Particle velocity vector.
Acceleration	Particle acceleration vector, typically accumulated from forces.
Mass	Particle mass, used for physics calculations. Zero mass can indicate an immovable object.
InverseMass	Precomputed inverse of mass, used to optimize physics calculations. Zero inverse mass indicates an immovable object.
Radius	Particle radius, used for rendering and collision. Note that non-spherical particles may need custom attributes for their dimensions or orientation.
Color	Particle color, typically in RGBA format. Can be used for rendering or as a general-purpose attribute for graph logic.
Age	Time since the particle was emitted, in seconds. Can be used for lifetime-based behaviors or effects.
Lifetime	Total lifetime of the particle, in seconds. When Age exceeds Lifetime, the particle is typically killed.
Orientation	Particle orientation, typically represented as a quaternion (x, y, z, w) or Euler angles. Used for rendering and oriented effects.
AngularVelocity	Particle angular velocity, typically represented as a vector (x, y, z) for axis-angle or (x, y, z, w) for quaternion derivatives. Used for rotational motion.
Temperature	Particle temperature, used for effects like heat distortion or phase changes.
Density	Particle density, used for fluid simulations or effects that depend on local particle concentration.
Charge	Particle electric charge, used for electrostatic forces or effects.
MoleculeId	Identifier for molecular dynamics simulations, used to group particles into molecules or track interactions.
CellId	Identifier for spatial partitioning cells, used for neighbor searches or grid-based effects.
SortKey	Precomputed sort key for depth sorting in GPU rendering. Typically a 32-bit unsigned integer encoding depth or distance from the camera.

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The documentation for this struct was generated from the following file:

• /home/runner/work/XII/XII/Source/Engine/GraphicsCore/Particles/ParticleGraph.h