Code/EnginePlugins/ParticlePlugin/Finalizer/ParticleFinalizer_Age.h - dev - redgpu/ezEngine

Code/EnginePlugins/ParticlePlugin/Finalizer/ParticleFinalizer_Age.h

56 строк2 KB

Jan Krassnigg

Various small improvements (particles, curves) (#1739)

11 дек 2025, 09:27

11 дек 2025, 09:271f50f82

#pragma once

#include <Foundation/Types/VarianceTypes.h>
#include <ParticlePlugin/Finalizer/ParticleFinalizer.h>

class ezPhysicsWorldModuleInterface;

/// Factory for age finalizers.
class EZ_PARTICLEPLUGIN_DLL ezParticleFinalizerFactory_Age final : public ezParticleFinalizerFactory
{
  EZ_ADD_DYNAMIC_REFLECTION(ezParticleFinalizerFactory_Age, ezParticleFinalizerFactory);

public:
  ezParticleFinalizerFactory_Age();

  virtual const ezRTTI* GetFinalizerType() const override;
  virtual void CopyFinalizerProperties(ezParticleFinalizer* pObject, bool bFirstTime) const override;

  ezVarianceTypeTime m_LifeTime;
  ezString m_sOnDeathEvent;
  ezString m_sLifeScaleParameter;
};


/// Updates particle age and removes particles that have exceeded their lifetime.
///
/// Each frame, the remaining lifetime is decreased by the time delta. When a particle's
/// lifetime reaches zero, it is removed from the system. If an on-death event is configured,
/// the event is triggered at the particle's position with its velocity as the direction.
/// The lifetime is initialized with optional variance and can be scaled by an effect parameter.
class EZ_PARTICLEPLUGIN_DLL ezParticleFinalizer_Age final : public ezParticleFinalizer
{
  EZ_ADD_DYNAMIC_REFLECTION(ezParticleFinalizer_Age, ezParticleFinalizer);

public:
  ezParticleFinalizer_Age();
  ~ezParticleFinalizer_Age();

  virtual void CreateRequiredStreams() override;

  ezVarianceTypeTime m_LifeTime;
  ezTempHashedString m_sOnDeathEvent;
  ezTempHashedString m_sLifeScaleParameter;

protected:
  friend class ezParticleFinalizerFactory_Age;

  virtual void InitializeElements(ezUInt64 uiStartIndex, ezUInt64 uiNumElements) override;
  virtual void Process(ezUInt64 uiNumElements) override;
  void OnParticleDeath(const ezStreamGroupElementRemovedEvent& e);

  bool m_bHasOnDeathEventHandler = false;
  ezProcessingStream* m_pStreamLifeTime = nullptr;
  ezProcessingStream* m_pStreamPosition = nullptr;
  ezProcessingStream* m_pStreamVelocity = nullptr;
};