axmol/extensions/Particle3D/ParticleUniverse/ParticleRenders/CCPUParticle3DBeamRender.cpp

/****************************************************************************
 Copyright (C) 2013 Henry van Merode. All rights reserved.
 Copyright (c) 2015 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
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#include "extensions/Particle3D/CCParticleSystem3D.h"
#include "extensions/Particle3D/ParticleUniverse/ParticleRenders/CCPUParticle3DBeamRender.h"
#include "extensions/Particle3D/ParticleUniverse/CCPUParticleSystem3D.h"
#include "extensions/Particle3D/ParticleUniverse/CCPUParticle3DUtil.h"
#include "extensions/Particle3D/ParticleUniverse/CCPUParticle3DSimpleSpline.h"
#include "renderer/CCMeshCommand.h"
#include "renderer/CCRenderer.h"
#include "renderer/CCTextureCache.h"
#include "renderer/CCGLProgramState.h"
#include "renderer/CCGLProgramCache.h"
#include "renderer/CCVertexIndexBuffer.h"
#include "base/CCDirector.h"
#include "3d/CCSprite3D.h"
#include "3d/CCMesh.h"
#include "2d/CCCamera.h"
#include <sstream>

NS_CC_BEGIN

// Constants
const bool PUParticle3DBeamRender::DEFAULT_USE_VERTEX_COLOURS = false;
const size_t PUParticle3DBeamRender::DEFAULT_MAX_ELEMENTS = 10;
const float PUParticle3DBeamRender::DEFAULT_UPDATE_INTERVAL = 0.1f;
const float PUParticle3DBeamRender::DEFAULT_DEVIATION = 300;
const size_t PUParticle3DBeamRender::DEFAULT_NUMBER_OF_SEGMENTS = 2;
const PUBillboardChain::TexCoordDirection PUParticle3DBeamRender::DEFAULT_TEXTURE_DIRECTION = PUBillboardChain::TCD_V;

PUParticle3DBeamRender* PUParticle3DBeamRender::create( const std::string &texFile )
{
    auto br = new (std::nothrow) PUParticle3DBeamRender();
    br->autorelease();
    br->_texFile = texFile;
    return br;
}

void PUParticle3DBeamRender::render( Renderer* renderer, const Mat4 &transform, ParticleSystem3D* particleSystem )
{
    const ParticlePool &particlePool = particleSystem->getParticlePool();
    if (!_isVisible || particlePool.empty() || !_billboardChain)
        return;

    PUParticle3DBeamVisualData* visualData = nullptr;
    Vec3 basePosition = static_cast<PUParticleSystem3D *>(_particleSystem)->getDerivedPosition();
    for (auto iter : particlePool.getActiveDataList())
    {
        auto particle = static_cast<PUParticle3D *>(iter);
        auto visualData = static_cast<PUParticle3DBeamVisualData*>(particle->visualData);
        if (visualData){
            Vec3 end = particle->position - basePosition;
            PUSimpleSpline spline;

            // Add points
            spline.addPoint(Vec3::ZERO);
            for (size_t numDev = 0; numDev < _numberOfSegments; ++numDev)
            {
                spline.addPoint(visualData->half[numDev]);
            }
            spline.addPoint(end);

            // Loop through all chain elements
            for (size_t j = 0; j < _maxChainElements; ++j)
            {
                PUBillboardChain::Element element = _billboardChain->getChainElement(visualData->chainIndex, j);

                // 1. Set the width of the chain if required
                if (particle->ownDimensions)
                {
                    element.width = _rendererScale.x * particle->width;
                }

                // 2. Set positions of the elements
                element.position = spline.interpolate((float)j / (float)_maxChainElements);

                // 3. Set the colour
                element.color = particle->color;

                // 4. Update
                _billboardChain->updateChainElement(visualData->chainIndex, j, element);
            }
            visualData->setVisible(true);
        }
    }

    _billboardChain->render(renderer, transform, particleSystem);
}

PUParticle3DBeamRender::PUParticle3DBeamRender() : 
    _billboardChain(0),
    _quota(0),
    _useVertexColours(DEFAULT_USE_VERTEX_COLOURS),
    _maxChainElements(DEFAULT_MAX_ELEMENTS),
    _updateInterval(DEFAULT_UPDATE_INTERVAL),
    _deviation(DEFAULT_DEVIATION),
    _numberOfSegments(DEFAULT_NUMBER_OF_SEGMENTS),
    _jump(false),
    _texCoordDirection(DEFAULT_TEXTURE_DIRECTION)
{
    autoRotate = true;
}

PUParticle3DBeamRender::~PUParticle3DBeamRender()
{
    if (!_particleSystem)
        return;

    destroyAll();
}

void PUParticle3DBeamRender::particleEmitted( PUParticleSystem3D* particleSystem, PUParticle3D* particle )
{
    if (!particle->visualData && !_visualData.empty() && particle->particleType == PUParticle3D::PT_VISUAL)
    {
        particle->visualData = _visualData.back();
        PUParticle3DBeamVisualData* beamRendererVisualData = static_cast<PUParticle3DBeamVisualData*>(particle->visualData);
        beamRendererVisualData->setVisible(true, _rendererScale.x * particleSystem->getDefaultWidth()); // PU 1.4
        _visualData.pop_back();
    }
}

void PUParticle3DBeamRender::particleExpired( PUParticleSystem3D* particleSystem, PUParticle3D* particle )
{
    if (particle->visualData)
    {
        PUParticle3DBeamVisualData* beamRendererVisualData = static_cast<PUParticle3DBeamVisualData*>(particle->visualData);
        beamRendererVisualData->setVisible(false, 0); // PU 1.4
        _visualData.push_back(beamRendererVisualData);
        particle->visualData = nullptr;
    }
}

//-----------------------------------------------------------------------
bool PUParticle3DBeamRender::isUseVertexColours(void) const
{
    return _useVertexColours;
} 
//-----------------------------------------------------------------------
void PUParticle3DBeamRender::setUseVertexColours(bool useVertexColours)
{
    _useVertexColours = useVertexColours;
    if (!_billboardChain)
        return;

    _billboardChain->setUseVertexColours(_useVertexColours);
    _billboardChain->setUseTextureCoords(!_useVertexColours);
} 
//-----------------------------------------------------------------------
size_t PUParticle3DBeamRender::getMaxChainElements(void) const
{
    return _maxChainElements;
} 
//-----------------------------------------------------------------------
void PUParticle3DBeamRender::setMaxChainElements(size_t maxChainElements)
{
    _maxChainElements = maxChainElements;
} 
//-----------------------------------------------------------------------
float PUParticle3DBeamRender::getUpdateInterval(void) const
{
    return _updateInterval;
}
//-----------------------------------------------------------------------
void PUParticle3DBeamRender::setUpdateInterval(float updateInterval)
{
    _updateInterval = updateInterval;
}
//-----------------------------------------------------------------------
float PUParticle3DBeamRender::getDeviation(void) const
{
    return _deviation;
}
//-----------------------------------------------------------------------
void PUParticle3DBeamRender::setDeviation(float deviation)
{
    _deviation = deviation;
}
//-----------------------------------------------------------------------
size_t PUParticle3DBeamRender::getNumberOfSegments(void) const
{
    return _numberOfSegments;
}
//-----------------------------------------------------------------------
void PUParticle3DBeamRender::setNumberOfSegments(size_t numberOfSegments)
{
    _numberOfSegments = numberOfSegments;
}
//-----------------------------------------------------------------------
bool PUParticle3DBeamRender::isJump(void) const
{
    return _jump;
}
//-----------------------------------------------------------------------
void PUParticle3DBeamRender::setJump(bool jump)
{
    _jump = jump;
}
//-----------------------------------------------------------------------
PUBillboardChain::TexCoordDirection PUParticle3DBeamRender::getTexCoordDirection(void) const
{
    return _texCoordDirection;
}
//-----------------------------------------------------------------------
void PUParticle3DBeamRender::setTexCoordDirection(PUBillboardChain::TexCoordDirection texCoordDirection)
{
    _texCoordDirection = texCoordDirection;
}
//-----------------------------------------------------------------------

void PUParticle3DBeamRender::prepare()
{
    if (!_particleSystem)
        return;

    // Register itself to the technique
    if (_particleSystem)
    {
        // Although it is safe to assume that technique == mParentTechnique, use the mParentTechnique, because the mParentTechnique is
        // also used for unregistering.
        static_cast<PUParticleSystem3D *>(_particleSystem)->addListener(this);
    }

    _quota = _particleSystem->getParticleQuota();

    // Create BillboardChain
    std::stringstream ss; 
    ss << this;
    _billboardChainName = "Beam" + ss.str();
    _billboardChain = new (std::nothrow) PUBillboardChain(_billboardChainName, _texFile);
    _billboardChain->setDynamic(true);
    _billboardChain->setNumberOfChains(_quota);
    _billboardChain->setMaxChainElements(_maxChainElements);
    _billboardChain->setTextureCoordDirection(_texCoordDirection);
    setUseVertexColours(_useVertexColours);
    _billboardChain->setOtherTextureCoordRange(0.0f, 1.0f);
    _billboardChain->setDepthTest(_depthTest);
    _billboardChain->setDepthWrite(_depthWrite);

    // Create number of VisualData objects
    for (size_t i = 0; i < _quota; i++)
    {
        for (size_t j = 0; j < _maxChainElements; j++)
        {
            PUBillboardChain::Element element;
            element = PUBillboardChain::Element(Vec3::ZERO, _rendererScale.x * static_cast<PUParticleSystem3D *>(_particleSystem)->getDefaultWidth(), 0.0f, Vec4::ONE, Quaternion::identity()); // V1.51
            _billboardChain->addChainElement(i, element);
        }

        PUParticle3DBeamVisualData* visualData = new (std::nothrow) PUParticle3DBeamVisualData(i, _billboardChain);
        for (size_t numDev = 0; numDev < _numberOfSegments; ++numDev)
        {
            // Initialise the positions
            visualData->half[numDev] = Vec3::ZERO;
            visualData->destinationHalf[numDev] = Vec3::ZERO;
        }
        _allVisualData.push_back(visualData); // Managed by this renderer
        _visualData.push_back(visualData); // Used to assign to a particle
    }
}

void PUParticle3DBeamRender::unPrepare()
{
    destroyAll();
}

void PUParticle3DBeamRender::updateRender( PUParticle3D *particle, float deltaTime, bool firstParticle )
{
    if (!particle->visualData)
        return;

    PUParticle3DBeamVisualData* beamRendererVisualData = static_cast<PUParticle3DBeamVisualData*>(particle->visualData);
    beamRendererVisualData->timeSinceLastUpdate -= deltaTime;

    if (beamRendererVisualData->timeSinceLastUpdate < 0)
    {

        Vec3 end = particle->position - static_cast<PUParticleSystem3D *>(_particleSystem)->getDerivedPosition();
        Vec3 perpendicular;
        float divide = (float)_numberOfSegments + 1.0f;
        for (size_t numDev = 0; numDev < _numberOfSegments; ++numDev)
        {
            Vec3::cross(end, Vec3(CCRANDOM_MINUS1_1(), CCRANDOM_MINUS1_1(), CCRANDOM_MINUS1_1()), &perpendicular);
            perpendicular.normalize();
            beamRendererVisualData->destinationHalf[numDev] = (((float)numDev + 1.0f) / divide) * end
                + Vec3(_rendererScale.x * _deviation * perpendicular.x
                     , _rendererScale.y * _deviation * perpendicular.y
                     , _rendererScale.z * _deviation * perpendicular.z);
        }
        beamRendererVisualData->timeSinceLastUpdate += _updateInterval;
    }

    Vec3 diff;
    for (size_t numDev = 0; numDev < _numberOfSegments; ++numDev)
    {
        if (_jump)
        {
            beamRendererVisualData->half[numDev] = beamRendererVisualData->destinationHalf[numDev];
        }
        else
        {
            diff = beamRendererVisualData->destinationHalf[numDev] - beamRendererVisualData->half[numDev];
            beamRendererVisualData->half[numDev] = beamRendererVisualData->half[numDev] + deltaTime * diff;
        }
    }
}

//-----------------------------------------------------------------------
void PUParticle3DBeamRender::destroyAll(void)
{
    if (!_particleSystem || !_billboardChain)
        return;

    // Remove the listener
    static_cast<PUParticleSystem3D *>(_particleSystem)->removeListener(this);

    // Delete the BillboardChain
    CC_SAFE_DELETE(_billboardChain);

    // Delete the visual data
    std::vector<PUParticle3DBeamVisualData*>::const_iterator it;
    std::vector<PUParticle3DBeamVisualData*>::const_iterator itEnd = _allVisualData.end();
    for (it = _allVisualData.begin(); it != itEnd; ++it)
    {
        delete *it;
    }

    _allVisualData.clear();
    _visualData.clear();
}

PUParticle3DBeamRender* PUParticle3DBeamRender::clone()
{
    auto br = PUParticle3DBeamRender::create(_texFile);
    copyAttributesTo(br);
    return br;
}

void PUParticle3DBeamRender::copyAttributesTo( PUParticle3DRender *render )
{
    PUParticle3DRender::copyAttributesTo(render);
    PUParticle3DBeamRender *beamRender = static_cast<PUParticle3DBeamRender*>(render);
    beamRender->setUseVertexColours(_useVertexColours);
    beamRender->setMaxChainElements(_maxChainElements);
    beamRender->setUpdateInterval(_updateInterval);
    beamRender->setDeviation(_deviation);
    beamRender->setNumberOfSegments(_numberOfSegments);
    beamRender->setJump(_jump);
    beamRender->setTexCoordDirection(_texCoordDirection);
}

NS_CC_END