text: /*
  -----------------------------------------------------------------------------
  This source file is part of OGRE
  (Object-oriented Graphics Rendering Engine)
  For the latest info, see http://www.ogre3d.org/
  
  Copyright (c) 2000-2012 Torus Knot Software Ltd
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
  
  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,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
  -----------------------------------------------------------------------------
  */
  #include "OgreRotationAffector.h"
  #include "OgreParticleSystem.h"
  #include "OgreStringConverter.h"
  #include "OgreParticle.h"
  
  
  namespace Ogre {
      
      // init statics
  	RotationAffector::CmdRotationSpeedRangeStart	RotationAffector::msRotationSpeedRangeStartCmd;
      RotationAffector::CmdRotationSpeedRangeEnd		RotationAffector::msRotationSpeedRangeEndCmd;
      RotationAffector::CmdRotationRangeStart			RotationAffector::msRotationRangeStartCmd;
      RotationAffector::CmdRotationRangeEnd			RotationAffector::msRotationRangeEndCmd;
      
      //-----------------------------------------------------------------------
  	RotationAffector::RotationAffector(ParticleSystem* psys) :
          ParticleAffector(psys),
  		mRotationSpeedRangeStart(0),
  		mRotationSpeedRangeEnd(0),
  		mRotationRangeStart(0),
  		mRotationRangeEnd(0)
      {
  		mType = "Rotator";
  
          // Init parameters
          if (createParamDictionary("RotationAffector"))
          {
              ParamDictionary* dict = getParamDictionary();
  
              dict->addParameter(ParameterDef("rotation_speed_range_start", 
  				"The start of a range of rotation speed to be assigned to emitted particles.", PT_REAL),
  				&msRotationSpeedRangeStartCmd);
  
  			dict->addParameter(ParameterDef("rotation_speed_range_end", 
  				"The end of a range of rotation speed to be assigned to emitted particles.", PT_REAL),
  				&msRotationSpeedRangeEndCmd);
  
  			dict->addParameter(ParameterDef("rotation_range_start", 
  				"The start of a range of rotation angles to be assigned to emitted particles.", PT_REAL),
  				&msRotationRangeStartCmd);
  
  			dict->addParameter(ParameterDef("rotation_range_end", 
  				"The end of a range of rotation angles to be assigned to emitted particles.", PT_REAL),
  				&msRotationRangeEndCmd);
          }
      }
  
      //-----------------------------------------------------------------------
  	void RotationAffector::_initParticle(Particle* pParticle)
  	{
  		pParticle->setRotation(
              mRotationRangeStart + 
              (Math::UnitRandom() * 
                  (mRotationRangeEnd - mRotationRangeStart)));
          pParticle->rotationSpeed =
              mRotationSpeedRangeStart + 
              (Math::UnitRandom() * 
                  (mRotationSpeedRangeEnd - mRotationSpeedRangeStart));
          
  	}
  	//-----------------------------------------------------------------------
      void RotationAffector::_affectParticles(ParticleSystem* pSystem, Real timeElapsed)
      {
          ParticleIterator pi = pSystem->_getIterator();
          Particle *p;
          Real ds;
  
          // Rotation adjustments by time
          ds = timeElapsed;
  
  		Radian NewRotation;
  
          while (!pi.end())
          {
              p = pi.getNext();
  
  			NewRotation = p->rotation + (ds * p->rotationSpeed);
  			p->setRotation( NewRotation );
          }
  
      }
      //-----------------------------------------------------------------------
      const Radian& RotationAffector::getRotationSpeedRangeStart(void) const
      {
          return mRotationSpeedRangeStart;
      }
      //-----------------------------------------------------------------------
      const Radian& RotationAffector::getRotationSpeedRangeEnd(void) const
      {
          return mRotationSpeedRangeEnd;
      }
      //-----------------------------------------------------------------------
      void RotationAffector::setRotationSpeedRangeStart(const Radian& val)
      {
          mRotationSpeedRangeStart = val;
      }
      //-----------------------------------------------------------------------
      void RotationAffector::setRotationSpeedRangeEnd(const Radian& val )
      {
          mRotationSpeedRangeEnd = val;
      }
      //-----------------------------------------------------------------------
      const Radian& RotationAffector::getRotationRangeStart(void) const
      {
          return mRotationRangeStart;
      }
      //-----------------------------------------------------------------------
      const Radian& RotationAffector::getRotationRangeEnd(void) const
      {
          return mRotationRangeEnd;
      }
      //-----------------------------------------------------------------------
      void RotationAffector::setRotationRangeStart(const Radian& val)
      {
          mRotationRangeStart = val;
      }
      //-----------------------------------------------------------------------
      void RotationAffector::setRotationRangeEnd(const Radian& val )
      {
          mRotationRangeEnd = val;
      }
  	//-----------------------------------------------------------------------
  
      //-----------------------------------------------------------------------
      //-----------------------------------------------------------------------
      // Command objects
      //-----------------------------------------------------------------------
      //-----------------------------------------------------------------------
      String RotationAffector::CmdRotationSpeedRangeEnd::doGet(const void* target) const
      {
          return StringConverter::toString(
              static_cast<const RotationAffector*>(target)->getRotationSpeedRangeEnd() );
      }
      void RotationAffector::CmdRotationSpeedRangeEnd::doSet(void* target, const String& val)
      {
          static_cast<RotationAffector*>(target)->setRotationSpeedRangeEnd(StringConverter::parseAngle(val));
      }
      //-----------------------------------------------------------------------
      String RotationAffector::CmdRotationSpeedRangeStart::doGet(const void* target) const
      {
          return StringConverter::toString(
              static_cast<const RotationAffector*>(target)->getRotationSpeedRangeStart() );
      }
      void RotationAffector::CmdRotationSpeedRangeStart::doSet(void* target, const String& val)
      {
          static_cast<RotationAffector*>(target)->setRotationSpeedRangeStart(StringConverter::parseAngle(val));
      }
      
  	//-----------------------------------------------------------------------
      String RotationAffector::CmdRotationRangeEnd::doGet(const void* target) const
      {
          return StringConverter::toString(
              static_cast<const RotationAffector*>(target)->getRotationRangeEnd() );
      }
      void RotationAffector::CmdRotationRangeEnd::doSet(void* target, const String& val)
      {
          static_cast<RotationAffector*>(target)->setRotationRangeEnd(StringConverter::parseAngle(val));
      }
      //-----------------------------------------------------------------------
      String RotationAffector::CmdRotationRangeStart::doGet(const void* target) const
      {
          return StringConverter::toString(
              static_cast<const RotationAffector*>(target)->getRotationRangeStart() );
      }
      void RotationAffector::CmdRotationRangeStart::doSet(void* target, const String& val)
      {
          static_cast<RotationAffector*>(target)->setRotationRangeStart(StringConverter::parseAngle(val));
      }
  }
  
  
  
  