proland::LifeCycleParticleLayer::LifeCycleParticle Struct Reference

Layer specific particle data for managing the lifecycle of particles. More...

#include <LifeCycleParticleLayer.h>

List of all members.

Public Attributes
float	birthDate
	The birth date of this particle, in microseconds.

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Detailed Description

Layer specific particle data for managing the lifecycle of particles.

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Member Data Documentation

float proland::LifeCycleParticleLayer::LifeCycleParticle::birthDate

The birth date of this particle, in microseconds.

This birth date allows one to compute the age of the particle. If this age is between 0 and fadeInDelay the particle is fading in. If this age is between fadeInDelay and fadeInDelay + activeDelay, the particle is active. Otherwise it is fading out. Note that we do not store the particle's age directly to avoid updating it at each frame.