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OgreColourInterpolatorAffector.cpp

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00001 /*
00002 -----------------------------------------------------------------------------
00003 This source file is part of OGRE 
00004     (Object-oriented Graphics Rendering Engine)
00005 For the latest info, see http://www.ogre3d.org/
00006 
00007 Copyright © 2000-2002 The OGRE Team
00008 Also see acknowledgements in Readme.html
00009 
00010 This program is free software; you can redistribute it and/or modify it under 
00011 the terms of the GNU Lesser General Public License as published by the Free Software 
00012 Foundation; either version 2 of the License, or (at your option) any later 
00013 version.
00014 
00015 This program is distributed in the hope that it will be useful, but WITHOUT 
00016 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 
00017 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
00018 
00019 You should have received a copy of the GNU Lesser General Public License along with 
00020 this program; if not, write to the Free Software Foundation, Inc., 59 Temple 
00021 Place - Suite 330, Boston, MA 02111-1307, USA, or go to 
00022 http://www.gnu.org/copyleft/lesser.txt.
00023 -----------------------------------------------------------------------------
00024 */
00025 #include "OgreColourInterpolatorAffector.h"
00026 #include "OgreParticleSystem.h"
00027 #include "OgreStringConverter.h"
00028 #include "OgreParticle.h"
00029 
00030 
00031 namespace Ogre {
00032     
00033     // init statics
00034     ColourInterpolatorAffector::CmdColourAdjust     ColourInterpolatorAffector::msColourCmd[MAX_STAGES];
00035     ColourInterpolatorAffector::CmdTimeAdjust       ColourInterpolatorAffector::msTimeCmd[MAX_STAGES];
00036 
00037     //-----------------------------------------------------------------------
00038     ColourInterpolatorAffector::ColourInterpolatorAffector()
00039     {
00040         for (int i=0;i<MAX_STAGES;i++)
00041         {
00042             // set default colour to transparent grey, transparent since we might not want to display the particle here
00043             // grey because when a colour component is 0.5f the maximum difference to another colour component is 0.5f
00044             mColourAdj[i]   = ColourValue(0.5f, 0.5f, 0.5f, 0.0f);
00045             mTimeAdj[i]     = 1.0f;
00046         }
00047 
00048         mType = "ColourInterpolator";
00049 
00050         // Init parameters
00051         if (createParamDictionary("ColourInterpolatorAffector"))
00052         {
00053             ParamDictionary* dict = getParamDictionary();
00054 
00055             for (int i=0;i<MAX_STAGES;i++)
00056             {
00057                 msColourCmd[i].mIndex   = i;
00058                 msTimeCmd[i].mIndex     = i;
00059 
00060                 StringUtil::StrStreamType stage;
00061                 stage << i;
00062                 String  colour_title    = String("colour") + stage.str();
00063                 String  time_title      = String("time") + stage.str();
00064                 String  colour_descr    = String("Stage ") + stage.str() + String(" colour.");
00065                 String  time_descr      = String("Stage ") + stage.str() + String(" time.");
00066 
00067                 dict->addParameter(ParameterDef(colour_title, colour_descr, PT_COLOURVALUE), &msColourCmd[i]);
00068                 dict->addParameter(ParameterDef(time_title,   time_descr,   PT_REAL),        &msTimeCmd[i]);
00069             }
00070         }
00071     }
00072     //-----------------------------------------------------------------------
00073     void ColourInterpolatorAffector::_affectParticles(ParticleSystem* pSystem, Real timeElapsed)
00074     {
00075         Particle*           p;
00076         ParticleIterator    pi              = pSystem->_getIterator();
00077 
00078 
00079         while (!pi.end())
00080         {
00081             p = pi.getNext();
00082             const Real      life_time       = p->mTotalTimeToLive;
00083             Real            particle_time   = 1.0f - (p->mTimeToLive / life_time); 
00084 
00085             if (particle_time <= mTimeAdj[0])
00086             {
00087                 p->mColour = mColourAdj[0];
00088             } else
00089             if (particle_time >= mTimeAdj[MAX_STAGES - 1])
00090             {
00091                 p->mColour = mColourAdj[MAX_STAGES-1];
00092             } else
00093             {
00094                 for (int i=0;i<MAX_STAGES-1;i++)
00095                 {
00096                     if (particle_time >= mTimeAdj[i] && particle_time < mTimeAdj[i + 1])
00097                     {
00098                         particle_time -= mTimeAdj[i];
00099                         particle_time /= (mTimeAdj[i+1]-mTimeAdj[i]);
00100                         p->mColour.r = ((mColourAdj[i+1].r * particle_time) + (mColourAdj[i].r * (1.0f - particle_time)));
00101                         p->mColour.g = ((mColourAdj[i+1].g * particle_time) + (mColourAdj[i].g * (1.0f - particle_time)));
00102                         p->mColour.b = ((mColourAdj[i+1].b * particle_time) + (mColourAdj[i].b * (1.0f - particle_time)));
00103                         p->mColour.a = ((mColourAdj[i+1].a * particle_time) + (mColourAdj[i].a * (1.0f - particle_time)));
00104                         break;
00105                     }
00106                 }
00107             }
00108         }
00109     }
00110     
00111     //-----------------------------------------------------------------------
00112     void ColourInterpolatorAffector::setColourAdjust(size_t index, ColourValue colour)
00113     {
00114         mColourAdj[index] = colour;
00115     }
00116     //-----------------------------------------------------------------------
00117     ColourValue ColourInterpolatorAffector::getColourAdjust(size_t index) const
00118     {
00119         return mColourAdj[index];
00120     }
00121 
00122 
00123     //-----------------------------------------------------------------------
00124     void ColourInterpolatorAffector::setTimeAdjust(size_t index, Real time)
00125     {
00126         mTimeAdj[index] = time;
00127     }
00128     //-----------------------------------------------------------------------
00129     Real ColourInterpolatorAffector::getTimeAdjust(size_t index) const
00130     {
00131         return mTimeAdj[index];
00132     }
00133     
00134     
00135     //-----------------------------------------------------------------------
00136     //-----------------------------------------------------------------------
00137     //-----------------------------------------------------------------------
00138     // Command objects
00139     //-----------------------------------------------------------------------
00140     //-----------------------------------------------------------------------
00141     String ColourInterpolatorAffector::CmdColourAdjust::doGet(const void* target) const
00142     {
00143         return StringConverter::toString(
00144             static_cast<const ColourInterpolatorAffector*>(target)->getColourAdjust(mIndex) );
00145     }
00146     void ColourInterpolatorAffector::CmdColourAdjust::doSet(void* target, const String& val)
00147     {
00148         static_cast<ColourInterpolatorAffector*>(target)->setColourAdjust(mIndex,
00149             StringConverter::parseColourValue(val));
00150     }
00151     //-----------------------------------------------------------------------
00152     String ColourInterpolatorAffector::CmdTimeAdjust::doGet(const void* target) const
00153     {
00154         return StringConverter::toString(
00155             static_cast<const ColourInterpolatorAffector*>(target)->getTimeAdjust(mIndex) );
00156     }
00157     void ColourInterpolatorAffector::CmdTimeAdjust::doSet(void* target, const String& val)
00158     {
00159         static_cast<ColourInterpolatorAffector*>(target)->setTimeAdjust(mIndex,
00160             StringConverter::parseReal(val));
00161     }
00162 
00163 }
00164 
00165 
00166 

Copyright © 2002-2003 by The OGRE Team
Last modified Sun Nov 28 19:48:17 2004