VClouds.cpp

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/*
--------------------------------------------------------------------------------
This source file is part of SkyX.
Visit http://www.paradise-studios.net/products/skyx/
 
Copyright (C) 2009-2012 Xavier Vergu�n Gonz�lez <xavyiy@gmail.com>
 
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
 
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 
You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/copyleft/lesser.txt.
--------------------------------------------------------------------------------
*/
 
#include "VClouds.h"
 
#include "gfx/skyx/SkyX.h"
 
namespace SkyX { namespace VClouds
{
    VClouds::VClouds(Ogre::SceneManager *sm)
        : mSceneManager(sm)
        , mCamera(0)
        , mCreated(false)
        , mGeometrySettings(GeometrySettings())
        , mDistanceFallingParams(Ogre::Vector2(1,-1))
        , mRenderQueueGroups(RenderQueueGroups(Ogre::RENDER_QUEUE_MAIN, Ogre::RENDER_QUEUE_9, Ogre::RENDER_QUEUE_4))
        , mWindDirection(Ogre::Degree(0))
        , mWindSpeed(80.0f)
        , mWheater(Ogre::Vector2(0.5f, 1.0f))
        , mDelayedResponse(false)
        , mSunDirection(Ogre::Vector3(0,-1,0))
        , mSunColor(Ogre::Vector3(1,1,1))
        , mAmbientColor(Ogre::Vector3(0.63f,0.63f,0.7f))
        , mLightResponse(Ogre::Vector4(0.25f,0.2f,1.0f,0.1f))
        , mAmbientFactors(Ogre::Vector4(0.45f,0.3f,0.6f,1))
        , mGlobalOpacity(1.0f)
        , mCloudFieldScale(1.0f)
        , mNoiseScale(4.2f)
        , mVisible(true)
        , mDataManager(new DataManager(this))
        , mGeometryManager(new GeometryManager(this))
        , mLightningManager(new LightningManager(this))
        , mCamerasData(std::vector<CameraData>())
        , mVolCloudsMaterial(Ogre::MaterialPtr())
        , mVolCloudsLightningMaterial(Ogre::MaterialPtr())
    {
    }
 
    VClouds::~VClouds()
    {
        remove();
 
        delete mDataManager;
        delete mGeometryManager;
        delete mLightningManager;
    }
 
    void VClouds::create()
    {
        remove();
 
        mVolCloudsMaterial = static_cast<Ogre::MaterialPtr>(Ogre::MaterialManager::getSingleton().getByName("SkyX_VolClouds"));
        mVolCloudsLightningMaterial = static_cast<Ogre::MaterialPtr>(Ogre::MaterialManager::getSingleton().getByName("SkyX_VolClouds_Lightning"));
 
        if (mVolCloudsMaterial.isNull() || mVolCloudsLightningMaterial.isNull())
        {
            SkyXLOG("Error while creating SkyX::VClouds::VClouds, materials are not found");
            return;
        }
 
        // Data manager
        mDataManager->create(128,128,20);
 
        // Geometry manager
        mGeometryManager->create(mGeometrySettings.Height, mGeometrySettings.Radius, mGeometrySettings.Alpha, 
            mGeometrySettings.Beta, mGeometrySettings.NumberOfBlocks, mGeometrySettings.Na, mGeometrySettings.Nb, mGeometrySettings.Nc);
 
        mGeometryManager->getSceneNode()->setVisible(mVisible);
 
        mVolCloudsMaterial
            ->getTechnique(0)->getPass(0)->getVertexProgramParameters()->setNamedConstant("uRadius", mGeometrySettings.Radius);
        mVolCloudsLightningMaterial->
            getTechnique(0)->getPass(0)->getVertexProgramParameters()->setNamedConstant("uRadius", mGeometrySettings.Radius);
 
        // Lightning manager
        mLightningManager->create();
 
        mCreated = true;
 
        // Update material parameters
        setSunColor(mSunColor);
        setAmbientColor(mAmbientColor);
        setLightResponse(mLightResponse);
        setAmbientFactors(mAmbientFactors);
 
        // Set current wheater
        setWheater(mWheater.x, mWheater.y, mDelayedResponse);
    }
 
    void VClouds::create(const GeometrySettings& gs)
    {
        // Update geometry settings
        mGeometrySettings = gs;
 
        create();
    }
 
    void VClouds::create(const Ogre::Vector2& Height, const float& Radius)
    {
        // Update geometry params
        mGeometrySettings.Height = Height;
        mGeometrySettings.Radius = Radius;
 
        create();
    }
 
    void VClouds::remove()
    {
        if (!mCreated)
        {
            return;
        }
 
        mDataManager->remove();
        mGeometryManager->remove();
        mLightningManager->remove();
 
        mCamera = 0;
        mCamerasData.clear();
 
        mVolCloudsMaterial.setNull();
        mVolCloudsLightningMaterial.setNull();
 
        mCreated = false;
    }
 
    void VClouds::update(const Ogre::Real& timeSinceLastFrame)
    {
        if (!mCreated)
        {
            return;
        }
 
        mDataManager->update(timeSinceLastFrame);
        mGeometryManager->update(timeSinceLastFrame);
        mLightningManager->update(timeSinceLastFrame);
 
        if (mLightningManager->isEnabled())
        {
            mVolCloudsLightningMaterial->
                getTechnique(0)->getPass(0)->getFragmentProgramParameters()->setNamedConstant("uInterpolation", mDataManager->_getInterpolation());
            mVolCloudsLightningMaterial->
                getTechnique(0)->getPass(0)->getFragmentProgramParameters()->setNamedConstant("uSunDirection", -mSunDirection);
        }
        else
        {
            mVolCloudsMaterial->
                getTechnique(0)->getPass(0)->getFragmentProgramParameters()->setNamedConstant("uInterpolation", mDataManager->_getInterpolation());
            mVolCloudsMaterial->
                getTechnique(0)->getPass(0)->getFragmentProgramParameters()->setNamedConstant("uSunDirection", -mSunDirection);
        }
    }
 
    void VClouds::notifyCameraRender(Ogre::Camera* c, const Ogre::Real& timeSinceLastCameraFrame)
    {
        if (!mCreated)
        {
            return;
        }
 
        mCamera = c;
 
        // Check if the camera is registered
        bool isRegistered = false;
        for (Ogre::uint32 k = 0; k < mCamerasData.size(); k++)
        {
            if (mCamerasData.at(k).camera == c)
            {
                isRegistered = true;
                break;
            }
        }
 
        if (!isRegistered)
        {
            mCamerasData.push_back(CameraData(c));
            SkyXLOG("VClouds warning: unregistered camera registered, manual unregistering is needed before camera destruction");
        }
 
        mGeometryManager->updateGeometry(c, timeSinceLastCameraFrame);
        mLightningManager->updateMaterial();
 
        mLightningManager->_updateRenderQueueGroup(mGeometryManager->_getCurrentDistance().y < mGeometryManager->getHeight().y/2 ?
            mRenderQueueGroups.vcloudsLightningsUnder : mRenderQueueGroups.vcloudsLightningsOver);
    }
 
    void VClouds::registerCamera(Ogre::Camera* c)
    {
        for (Ogre::uint32 k = 0; k < mCamerasData.size(); k++)
        {
            if (mCamerasData.at(k).camera == c)
            {
                return;
            }
        }
 
        mCamerasData.push_back(CameraData(c));
    }
 
    void VClouds::unregisterCamera(Ogre::Camera* c)
    {
        for (std::vector<CameraData>::iterator it = mCamerasData.begin(); it != mCamerasData.end(); it++)
        {
            if ((*it).camera == c)
            {
                mCamerasData.erase(it);
                return;
            }
        }
    }
 
    void VClouds::setVisible(const bool& visible)
    {
        mVisible = visible;
 
        if (!mCreated)
        {
            return;
        }
 
        mGeometryManager->getSceneNode()->setVisible(mVisible);
        mLightningManager->_setVisible(mVisible);
    }
 
    void VClouds::setRenderQueueGroups(const RenderQueueGroups& rqg)
    {
        mRenderQueueGroups = rqg;
 
        if (!mCreated)
        {
            return;
        }
 
        mGeometryManager->_updateRenderQueueGroup(rqg.vclouds);
    }
 
    void VClouds::setSunColor(const Ogre::Vector3& SunColor)
    {
        mSunColor = SunColor;
 
        if (!mCreated)
        {
            return;
        }
 
        mVolCloudsMaterial->getTechnique(0)->getPass(0)->getFragmentProgramParameters()
            ->setNamedConstant("uSunColor", mSunColor);
        mVolCloudsLightningMaterial->getTechnique(0)->getPass(0)->getFragmentProgramParameters()
            ->setNamedConstant("uSunColor", mSunColor);
    }
 
    void VClouds::setAmbientColor(const Ogre::Vector3& AmbientColor)
    {
        mAmbientColor = AmbientColor;
 
        if (!mCreated)
        {
            return;
        }
 
        mVolCloudsMaterial->getTechnique(0)->getPass(0)->getFragmentProgramParameters()
            ->setNamedConstant("uAmbientColor", mAmbientColor);
        mVolCloudsLightningMaterial->getTechnique(0)->getPass(0)->getFragmentProgramParameters()
            ->setNamedConstant("uAmbientColor", mAmbientColor);
    }
 
    void VClouds::setLightResponse(const Ogre::Vector4& LightResponse)
    {
        mLightResponse = LightResponse;
 
        if (!mCreated)
        {
            return;
        }
 
        mVolCloudsMaterial->getTechnique(0)->getPass(0)->getFragmentProgramParameters()
            ->setNamedConstant("uLightResponse", mLightResponse);
        mVolCloudsLightningMaterial->getTechnique(0)->getPass(0)->getFragmentProgramParameters()
            ->setNamedConstant("uLightResponse", mLightResponse);
    }
 
    void VClouds::setAmbientFactors(const Ogre::Vector4& AmbientFactors)
    {
        mAmbientFactors = AmbientFactors;
 
        if (!mCreated)
        {
            return;
        }
 
        mVolCloudsMaterial->getTechnique(0)->getPass(0)->getFragmentProgramParameters()
            ->setNamedConstant("uAmbientFactors", mAmbientFactors);
        mVolCloudsLightningMaterial->getTechnique(0)->getPass(0)->getFragmentProgramParameters()
            ->setNamedConstant("uAmbientFactors", mAmbientFactors);
    }
 
    void VClouds::setWheater(const float& Humidity, const float& AverageCloudsSize, const bool& DelayedResponse)
    {
        mWheater = Ogre::Vector2(Humidity, AverageCloudsSize);
        mDelayedResponse = DelayedResponse;
 
        if (!mCreated)
        {
            return;
        }
 
        mDataManager->setWheater(mWheater.x, mWheater.y, mDelayedResponse);
    }
 
}}