#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;
     }