axmol/extensions/Particle3D/ParticleUniverse/CCPUParticle3DForceField.cpp

/****************************************************************************
 Copyright (c) 2015 Chukong Technologies Inc.
 
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 all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 ****************************************************************************/

#include "CCPUParticle3DForceField.h"

NS_CC_BEGIN

const Vec3 PUForceFieldCalculationFactory::DEFAULT_WORLDSIZE = Vec3(500.0f, 500.0f, 500.0f);

//-----------------------------------------------------------------------
unsigned short PUForceFieldCalculationFactory::getOctaves(void) const
{
    return _octaves;
}
//-----------------------------------------------------------------------
void PUForceFieldCalculationFactory::setOctaves(unsigned short octaves)
{
    _octaves = octaves;
    generate(getForceFieldSize(), _octaves, _frequency, _amplitude, _persistence, _worldSize);
}
//-----------------------------------------------------------------------
double PUForceFieldCalculationFactory::getFrequency(void) const
{
    return _frequency;
}
//-----------------------------------------------------------------------
void PUForceFieldCalculationFactory::setFrequency(double frequency)
{
    _frequency = frequency;
    generate(getForceFieldSize(), _octaves, _frequency, _amplitude, _persistence, _worldSize);
}
//-----------------------------------------------------------------------
double PUForceFieldCalculationFactory::getAmplitude(void) const
{
    return _amplitude;
}
//-----------------------------------------------------------------------
void PUForceFieldCalculationFactory::setAmplitude(double amplitude)
{
    _amplitude = amplitude;
    generate(getForceFieldSize(), _octaves, _frequency, _amplitude, _persistence, _worldSize);
}
//-----------------------------------------------------------------------
double PUForceFieldCalculationFactory::getPersistence(void) const
{
    return _persistence;
}
//-----------------------------------------------------------------------
void PUForceFieldCalculationFactory::setPersistence(double persistence)
{
    _persistence = persistence;
    generate(getForceFieldSize(), _octaves, _frequency, _amplitude, _persistence, _worldSize);
}
//-----------------------------------------------------------------------
unsigned int PUForceFieldCalculationFactory::getForceFieldSize(void) const
{
    return 1; // Return default cubic size
}
//-----------------------------------------------------------------------
void PUForceFieldCalculationFactory::setForceFieldSize(unsigned int forceFieldSize)
{
    // The forcefield cannot be zero
    if (forceFieldSize == 0)
        return;

    generate(forceFieldSize, _octaves, _frequency, _amplitude, _persistence, _worldSize);
}
//-----------------------------------------------------------------------
Vec3 PUForceFieldCalculationFactory::getWorldSize(void) const
{
    return _worldSize;
}
//-----------------------------------------------------------------------
void PUForceFieldCalculationFactory::setWorldSize(const Vec3& worldSize)
{
    // The worldsize cannot be zero
    if (worldSize == Vec3::ZERO)
        return;

    _worldSize = worldSize;
    generate(getForceFieldSize(), _octaves, _frequency, _amplitude, _persistence, _worldSize);
}
//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
void PURealTimeForceFieldCalculationFactory::generate(unsigned int forceFieldSize, 
                                                    unsigned short octaves, 
                                                    double frequency, 
                                                    double amplitude, 
                                                    double persistence, 
                                                    const Vec3& worldSize)
{
    _octaves = octaves;
    _frequency = frequency;
    _amplitude = amplitude;
    _persistence = persistence;
    _worldSize = worldSize;
    _noise3D.initialise(octaves, frequency, amplitude, persistence);

    if (worldSize != Vec3::ZERO)
    {
        _mapScale.x = 1.0f / worldSize.x; // Remark: forceFieldSize is not used, because it is a unit cube
        _mapScale.y = 1.0f / worldSize.y;
        _mapScale.z = 1.0f / worldSize.z;
    }
}
//-----------------------------------------------------------------------
void PURealTimeForceFieldCalculationFactory::determineForce(const Vec3& position, Vec3& force, float delta)
{
    _mappedPosition.x = _mapScale.x * position.x;
    _mappedPosition.y = _mapScale.y * position.y;
    _mappedPosition.z = _mapScale.z * position.z;

    if (_mappedPosition.x < 0.0f || _mappedPosition.x > 1.0f ||
        _mappedPosition.y < 0.0f || _mappedPosition.y > 1.0f ||
        _mappedPosition.z < 0.0f || _mappedPosition.z > 1.0f)
    {
        // Position is outside the forcefield (outside the unit cube)
        return;
    }

    force.x = (float)(_noise3D.noise(_mappedPosition.x + delta, _mappedPosition.y, _mappedPosition.z) - 
        _noise3D.noise(_mappedPosition.x - delta, _mappedPosition.y, _mappedPosition.z));
    force.y = (float)(_noise3D.noise(_mappedPosition.x, _mappedPosition.y + delta, _mappedPosition.z) - 
        _noise3D.noise(_mappedPosition.x, _mappedPosition.y - delta, _mappedPosition.z));
    force.z = (float)(_noise3D.noise(_mappedPosition.x, _mappedPosition.y, _mappedPosition.z + delta) - 
        _noise3D.noise(_mappedPosition.x, _mappedPosition.y, _mappedPosition.z - delta));
}
//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
PUForceField::PUForceField(void) :
    _forceFieldCalculationFactory(0),
    _forceFieldPositionBase(Vec3::ZERO),
    _forceFieldType(FF_REALTIME_CALC),
    _octaves(2),
    _frequency(1.0f),
    _amplitude(1.0f),
    _persistence(1.0f),
    _forceFieldSize(64),
    _worldSize(PUForceFieldCalculationFactory::DEFAULT_WORLDSIZE)
{
}
//-----------------------------------------------------------------------
PUForceField::~PUForceField(void)
{
    if (_forceFieldCalculationFactory)
    {
        delete _forceFieldCalculationFactory;
    }
}
//-----------------------------------------------------------------------
void PUForceField::initialise(ForceFieldType type,
                            const Vec3& position,
                            unsigned int forceFieldSize, 
                            unsigned short octaves, 
                            double frequency, 
                            double amplitude, 
                            double persistence, 
                            const Vec3& worldSize)

{
    // Initialise first
    initialise(type, forceFieldSize, octaves, frequency, amplitude, persistence, worldSize);

    // Store the base and max position of the forcefield.
    _forceFieldPositionBase = position;
    _forceFieldPositionBase.x -= 0.5f * worldSize.x;
    _forceFieldPositionBase.y -= 0.5f * worldSize.y;
    _forceFieldPositionBase.z -= 0.5f * worldSize.z;
}
//-----------------------------------------------------------------------
void PUForceField::initialise(ForceFieldType type,
                            unsigned int forceFieldSize, 
                            unsigned short octaves, 
                            double frequency, 
                            double amplitude, 
                            double persistence, 
                            const Vec3& worldSize)
{
    // Create a factory
    _forceFieldCalculationFactory = createForceFieldCalculationFactory(type);

    // Create all necessary data for the force field
    _forceFieldCalculationFactory->generate(forceFieldSize, octaves, frequency, amplitude, persistence, worldSize);
}
//-----------------------------------------------------------------------
const Vec3& PUForceField::getForceFieldPositionBase(void) const
{
    return _forceFieldPositionBase;
}
//-----------------------------------------------------------------------
void PUForceField::setForceFieldPositionBase(const Vec3& position)
{
    _forceFieldPositionBase = position;
}
//-----------------------------------------------------------------------
void PUForceField::determineForce(const Vec3& position, Vec3& force, float delta)
{
    force.x = 0.0f;
    force.y = 0.0f;
    force.z = 0.0f;

    if (_forceFieldCalculationFactory)
    {
        _forceFieldCalculationFactory->determineForce(position - _forceFieldPositionBase, force, delta);
    }
}
//-----------------------------------------------------------------------
PUForceFieldCalculationFactory* PUForceField::getForceFieldCalculationFactory() const
{
    return _forceFieldCalculationFactory;
}
//-----------------------------------------------------------------------
void PUForceField::setForceFieldCalculationFactory(PUForceFieldCalculationFactory* forceFieldCalculationFactory)
{
    if (_forceFieldCalculationFactory)
    {
        delete _forceFieldCalculationFactory;
    }
    _forceFieldCalculationFactory = forceFieldCalculationFactory;
}
//-----------------------------------------------------------------------
PUForceFieldCalculationFactory* PUForceField::createForceFieldCalculationFactory(ForceFieldType type)
{
    _forceFieldType = type;
    if (type == FF_MATRIX_CALC)
    {
        // Use precreated matrix
        //setForceFieldCalculationFactory(new (std::nothrow) MatrixForceFieldCalculationFactory());
        return getForceFieldCalculationFactory();
    }
    else
    {
        // Use realtime calculation
        setForceFieldCalculationFactory(new (std::nothrow) PURealTimeForceFieldCalculationFactory());
        return getForceFieldCalculationFactory();
    }
}
//-----------------------------------------------------------------------
const PUForceField::ForceFieldType PUForceField::getForceFieldType(void) const
{
    return _forceFieldType;
}
//-----------------------------------------------------------------------
void PUForceField::setForceFieldType(const PUForceField::ForceFieldType forceFieldType)
{
    _forceFieldType = forceFieldType;
    if (_forceFieldCalculationFactory)
    {
        initialise(_forceFieldType, _forceFieldSize, _octaves, _frequency, _amplitude, _persistence, _worldSize);
    }
}
//-----------------------------------------------------------------------
unsigned short PUForceField::getOctaves(void) const
{
    return _octaves;
}
//-----------------------------------------------------------------------
void PUForceField::setOctaves(unsigned short octaves)
{
    _octaves = octaves;
    if (_forceFieldCalculationFactory)
    {
        _forceFieldCalculationFactory->setOctaves(octaves);
    }
}
//-----------------------------------------------------------------------
double PUForceField::getFrequency(void) const
{
    return _frequency;
}
//-----------------------------------------------------------------------
void PUForceField::setFrequency(double frequency)
{
    _frequency = frequency;
    if (_forceFieldCalculationFactory)
    {
        _forceFieldCalculationFactory->setFrequency(frequency);
    }
}
//-----------------------------------------------------------------------
double PUForceField::getAmplitude(void) const
{
    return _amplitude;
}
//-----------------------------------------------------------------------
void PUForceField::setAmplitude(double amplitude)
{
    _amplitude = amplitude;
    if (_forceFieldCalculationFactory)
    {
        _forceFieldCalculationFactory->setAmplitude(amplitude);
    }
}
//-----------------------------------------------------------------------
double PUForceField::getPersistence(void) const
{
    return _persistence;
}
//-----------------------------------------------------------------------
void PUForceField::setPersistence(double persistence)
{
    _persistence = persistence;
    if (_forceFieldCalculationFactory)
    {
        _forceFieldCalculationFactory->setPersistence(persistence);
    }
}
//-----------------------------------------------------------------------
unsigned int PUForceField::getForceFieldSize(void) const
{
    return _forceFieldSize;
}
//-----------------------------------------------------------------------
void PUForceField::setForceFieldSize(unsigned int forceFieldSize)
{
    _forceFieldSize = forceFieldSize;
    if (_forceFieldCalculationFactory)
    {
        _forceFieldCalculationFactory->setForceFieldSize(forceFieldSize);
    }
}
//-----------------------------------------------------------------------
Vec3 PUForceField::getWorldSize(void) const
{
    return _worldSize;
}
//-----------------------------------------------------------------------
void PUForceField::setWorldSize(const Vec3& worldSize)
{
    _worldSize = worldSize;
    if (_forceFieldCalculationFactory)
    {
        _forceFieldCalculationFactory->setWorldSize(worldSize);
    }
}

NS_CC_END