axmol/extensions/Particle3D/PU/CCPUSphereSurfaceEmitter.cpp

/****************************************************************************
 Copyright (C) 2013 Henry van Merode. All rights reserved.
 Copyright (c) 2015-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

 https://axis-project.github.io/

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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() : 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 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