LParticle< VECTOR, SPRITEDESC > Class Template Reference

A particle. More...

#include <Particle.h>

Inheritance diagram for LParticle< VECTOR, SPRITEDESC >:

Public Member Functions
	LParticle (const LParticleDesc< VECTOR, SPRITEDESC > &, float)
	Constructor. More...
void	move (float)
	Move and rotate. More...
void	rescale (float)
	Rescale. More...
void	fade (float)
	Fade. More...
void	translate (const VECTOR &)
	Translate. More...

Public Attributes
float	m_fBirthTime = 0.0f
	Time of creation.
Public Attributes inherited from LParticleDesc< VECTOR, SPRITEDESC >
VECTOR	m_vVel = VECTOR::Zero
	Velocity.
VECTOR	m_vAccel = VECTOR::Zero
	Acceleration.
float	m_fFriction = 0.0f
	Coefficient of friction.
float	m_fRSpeed = 0.0f
	Rotational speed.
float	m_fLifeSpan = FLT_MAX
	Time it will live for.
float	m_fMaxScale = 1.0f
	Maximum scale.
float	m_fScaleInFrac = 0.0f
	Fraction of life growing in.
float	m_fScaleOutFrac = 0.0f
	Fraction of life shrinking out.
float	m_fFadeInFrac = 0.0f
	Fraction of life fading in.
float	m_fFadeOutFrac = 0.0f
	Fraction of life fading out.

Detailed Description

template<class VECTOR, class SPRITEDESC>
class LParticle< VECTOR, SPRITEDESC >

A particle is a sprite that exists for a brief time. It can grow in and shrink out, and also fade in and fade out using an alpha channel. It's templated so we can define a 2D and a 3D version with a minimum of fuss.

Template Parameters

VECTOR	A vector class.
SPRITEDESC	A sprite descriptor class.

Constructor & Destructor Documentation

LParticle()

template<T0 >

LParticle< T0 >::LParticle	(	const LParticleDesc< VECTOR, SPRITEDESC > &	d,
		float	t
	)

Create a particle given a particle descriptor and a creation time.

Template Parameters

VECTOR	A vector class.
SPRITEDESC	A sprite descriptor class.

Parameters

d	Particle descriptor.
t	Birth time.

Member Function Documentation

fade()

template<T0 >

void LParticle< T0 >::fade

(

float

f

)

Make the particle's alpha channel fade in or fade out over time.

Template Parameters

VECTOR	A vector class.
SPRITEDESC	A sprite descriptor class.

Parameters

f	Fraction of lifespan lived, from 0.0f to 1.0f inclusive.

move()

template<T0 >

void LParticle< T0 >::move

(

float

t

)

Translate, apply acceleration, apply friction, and rotate.

Template Parameters

VECTOR	A vector class.
SPRITEDESC	A sprite descriptor class.

Parameters

t	Time step.

rescale()

template<T0 >

void LParticle< T0 >::rescale

(

float

f

)

Rescale the particle. It grows to m_fMaxScale for the first m_fScaleInFrac fraction of its life, and shrink to zero for the last m_fScaleOutFrac of its life.

Template Parameters

VECTOR	A vector class.
SPRITEDESC	A sprite descriptor class.

Parameters

f	Fraction of lifespan lived, from 0.0f to 1.0f inclusive.

translate()

template<T0 >

void LParticle< T0 >::translate

(

const VECTOR &

delta

)

Move particle by a given distance and direction.

Parameters

delta

Vector amount to add to current position.

Template Parameters

VECTOR	A vector class.
SPRITEDESC	A sprite descriptor class.