axmol/extensions/Particle3D/ParticleUniverse/ParticleEmitters/CCPUParticle3DSphereSurfaceEmitter.cpp

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 Copyright (c) 2015 Chukong Technologies Inc.
 
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#include "CCPUParticle3DSphereSurfaceEmitter.h"
#include "Particle3D/ParticleUniverse/CCPUParticleSystem3D.h"
#include "Particle3D/ParticleUniverse/CCPUParticle3DUtil.h"

NS_CC_BEGIN
// Constants
const float PUParticle3DSphereSurfaceEmitter::DEFAULT_RADIUS = 10.0f;

//-----------------------------------------------------------------------
PUParticle3DSphereSurfaceEmitter::PUParticle3DSphereSurfaceEmitter(void) : 
    PUParticle3DEmitter(),
    _radius(DEFAULT_RADIUS),
    _randomVector(Vec3::ZERO)
{
}
//-----------------------------------------------------------------------
const float PUParticle3DSphereSurfaceEmitter::getRadius(void) const
{
    return _radius;
}
//-----------------------------------------------------------------------
void PUParticle3DSphereSurfaceEmitter::setRadius(const float radius)
{
    _radius = radius;
}
//-----------------------------------------------------------------------
void PUParticle3DSphereSurfaceEmitter::initParticlePosition(PUParticle3D* particle)
{
    // Generate a random unit vector to calculate a point on the sphere. This unit vector is
    // also used as direction vector if mAutoDirection has been set.
    _randomVector = Vec3(CCRANDOM_MINUS1_1(), 
        CCRANDOM_MINUS1_1(),
        CCRANDOM_MINUS1_1());
    _randomVector.normalize();
    //ParticleSystem* sys = mParentTechnique->getParentSystem();
    //if (sys)
    {
        Mat4 rotMat;
        Mat4::createRotation(static_cast<PUParticleSystem3D *>(_particleSystem)->getDerivedOrientation(), &rotMat);
        particle->position = getDerivedPosition() + rotMat * (Vec3(_emitterScale.x * _randomVector.x, _emitterScale.y * _randomVector.y, _emitterScale.z * _randomVector.z) * _radius);
    }
    //else
    //{
    //	particle->position = getDerivedPosition() + (_mEmitterScale * _randomVector * _radius);
    //}
    particle->originalPosition = particle->position;
}
//-----------------------------------------------------------------------
void PUParticle3DSphereSurfaceEmitter::initParticleDirection(PUParticle3D* particle)
{
    if (_autoDirection)
    {
        // The value of the direction vector that has been set does not have a meaning for
        // the sphere surface emitter.
        float angle = 0.0f;
        generateAngle(angle);
        if (angle != 0.0f)
        {
            //particle->direction = _randomVector.randomDeviant(angle, mUpVector);
            particle->direction = PUParticle3DUtil::randomDeviant(_randomVector, angle, _upVector);
            particle->originalDirection = particle->direction;
        }
        else
        {
            particle->direction = _randomVector;
            particle->originalDirection = particle->direction;
        }
    }
    else
    {
        // Use the standard way
        PUParticle3DEmitter::initParticleDirection(particle);
    }
}

PUParticle3DSphereSurfaceEmitter* PUParticle3DSphereSurfaceEmitter::create()
{
    auto pe = new (std::nothrow) PUParticle3DSphereSurfaceEmitter();
    pe->autorelease();
    return pe;
}

NS_CC_END