axmol/extensions/Particle3D/PU/CCPUSphereSurfaceEmitter.cpp

/****************************************************************************
 Copyright (C) 2013 Henry van Merode. All rights reserved.
 Copyright (c) 2015-2017 Chukong Technologies Inc.
 
 http://www.cocos2d-x.org
 
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 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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#include "CCPUSphereSurfaceEmitter.h"
#include "extensions/Particle3D/PU/CCPUParticleSystem3D.h"
#include "extensions/Particle3D/PU/CCPUUtil.h"

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

//-----------------------------------------------------------------------
PUSphereSurfaceEmitter::PUSphereSurfaceEmitter(void) : 
    PUEmitter(),
    _radius(DEFAULT_RADIUS)
{
}
//-----------------------------------------------------------------------
float PUSphereSurfaceEmitter::getRadius() const
{
    return _radius;
}
//-----------------------------------------------------------------------
void PUSphereSurfaceEmitter::setRadius(const float radius)
{
    _radius = radius;
}
//-----------------------------------------------------------------------
void PUSphereSurfaceEmitter::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.set(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 PUSphereSurfaceEmitter::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 = PUUtil::randomDeviant(_randomVector, angle, _upVector);
            particle->originalDirection = particle->direction;
        }
        else
        {
            particle->direction = _randomVector;
            particle->originalDirection = particle->direction;
        }
    }
    else
    {
        // Use the standard way
        PUEmitter::initParticleDirection(particle);
    }
}

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

void PUSphereSurfaceEmitter::copyAttributesTo( PUEmitter* emitter )
{
    PUEmitter::copyAttributesTo(emitter);

    PUSphereSurfaceEmitter* sphereSurfaceEmitter = static_cast<PUSphereSurfaceEmitter*>(emitter);
    sphereSurfaceEmitter->_radius = _radius;
}

PUSphereSurfaceEmitter* PUSphereSurfaceEmitter::clone()
{
    auto be = PUSphereSurfaceEmitter::create();
    copyAttributesTo(be);
    return be;
}

NS_CC_END