#include <particleemitterprop.h>

Public Member Functions
	ParticleEmitterProp ()

void	set (const T min, const T max)

void	set (const T val)

void	setFunction (ParticleChangeFuncT func, T amplitude, const int period, const int phase)

T	value (int tick) const

Data Fields
T	minVal

T	maxVal

ParticleChangeFuncT	changeFunc

T	changeAmplitude

int	changePeriod

int	changePhase

Detailed Description

template<typename T>
struct ParticleEmitterProp< T >

Definition at line 33 of file particleemitterprop.h.

Constructor & Destructor Documentation

◆ ParticleEmitterProp()

template<typename T >

ParticleEmitterProp< T >::ParticleEmitterProp ( )

inline

Definition at line 35 of file particleemitterprop.h.

  :
  minVal(0),
  maxVal(0),
  changeFunc(ParticleChangeFunc::FUNC_NONE),
  changeAmplitude(0),
  changePeriod(0),
  changePhase(0)
  {
  }

Member Function Documentation

◆ set() [1/2]

template<typename T >

void ParticleEmitterProp< T >::set	(	const T	min,
		const T	max
	)

inline

Definition at line 47 of file particleemitterprop.h.

  {
  minVal = min;
  maxVal = max;
  }

References ParticleEmitterProp< T >::maxVal, and ParticleEmitterProp< T >::minVal.

Referenced by ParticleEmitter::adjustSize(), ParticleEmitter::ParticleEmitter(), ParticleEmitter::readParticleEmitterProp(), and ParticleEmitterProp< T >::set().

◆ set() [2/2]

template<typename T >

void ParticleEmitterProp< T >::set ( const T val )

inline

Definition at line 53 of file particleemitterprop.h.

  {
  set(val, val);
  }

References ParticleEmitterProp< T >::set().

◆ setFunction()

template<typename T >

void ParticleEmitterProp< T >::setFunction	(	ParticleChangeFuncT	func,
		T	amplitude,
		const int	period,
		const int	phase
	)

inline

Definition at line 58 of file particleemitterprop.h.

  {
  changeFunc = func;
  changeAmplitude = amplitude;
  changePeriod = period;
  if (changePeriod == 0)
  changePeriod = 1;
  changePhase = phase;
  }

References ParticleEmitterProp< T >::changeAmplitude, ParticleEmitterProp< T >::changeFunc, ParticleEmitterProp< T >::changePeriod, and ParticleEmitterProp< T >::changePhase.

Referenced by ParticleEmitter::readParticleEmitterProp().

◆ value()

template<typename T >

T ParticleEmitterProp< T >::value ( int tick ) const

inline

Definition at line 71 of file particleemitterprop.h.

  {
  tick += changePhase;
  T val = static_cast<T>(minVal + (maxVal - minVal)
  * (rand() / (static_cast<double>(RAND_MAX) + 1)));
  
  switch (changeFunc)
  {
  case ParticleChangeFunc::FUNC_SINE:
  val += static_cast<T>(std::sin(M_PI * 2 * (static_cast<double>(
  tick % changePeriod) / static_cast<double>(
  changePeriod)))) * changeAmplitude;
  break;
  case ParticleChangeFunc::FUNC_SAW:
  val += static_cast<T>(changeAmplitude * (static_cast<double>(
  tick % changePeriod) / static_cast<double>(
  changePeriod))) * 2 - changeAmplitude;
  break;
  case ParticleChangeFunc::FUNC_TRIANGLE:
  if ((tick % changePeriod) * 2 < changePeriod)
  {
  val += changeAmplitude - static_cast<T>((
  tick % changePeriod) / static_cast<double>(
  changePeriod)) * changeAmplitude * 4;
  }
  else
  {
  val += changeAmplitude * -3 + static_cast<T>((
  tick % changePeriod) / static_cast<double>(
  changePeriod)) * changeAmplitude * 4;
  // I have no idea why this works but it does
  }
  break;
  case ParticleChangeFunc::FUNC_SQUARE:
  if ((tick % changePeriod) * 2 < changePeriod)
  val += changeAmplitude;
  else
  val -= changeAmplitude;
  break;
  case ParticleChangeFunc::FUNC_NONE:
  default:
  // nothing
  break;
  }
  
  return val;
  }