OMKOrbit.cpp

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#include "OMKOrbit.h"
#include "OMKParametersAccessor.inl"
#include "OMKAttribute.inl"
#include "OMKTracer.h"
#include "Wm4BSplineCurve3.h"
#include "OMKTransformType.h"

using namespace OMK ;
using namespace OMK::Type ;

//-------------------------------------------------------------------------
REGISTER_OBJECT_FACTORY( Orbit, "Orbit" ) ;
//-----------------------------------------------------------------------------

Orbit::Orbit( Controller& ctrl, const ObjectDescriptor& objectDescriptor )
: OMK::SimplePoint( ctrl, objectDescriptor ),
  _angle( 0.0f ),
  _planetAngle( 0.0f ),
  _speed( "TimeScale", 0.0f ), 
  _radius( "Radius", 1.0f ), 
  _period( "Period", 1.0f ), 
  _planetPeriod( "PlanetPeriod", 1.0f )
{ 
  addAttribute( _speed ) ;
  addAttribute( _radius ) ;
  addAttribute( _period ) ;
  addAttribute( _planetPeriod ) ;
}

//-----------------------------------------------------------------------------

Orbit::~Orbit() 
{
}
//-----------------------------------------------------------------------------

bool Orbit::loadParameters( const ConfigurationParameterDescriptor * node )
{
  SimplePoint::loadParameters( node ) ;
  _planetAxis = _position.get().getDirection() ;
  _position.setValueToOutput() ;

  return true ; 
}
//-----------------------------------------------------------------------------

void Orbit::computeParameters() 
{
  // Get the increment
  if ( 1.0f <= _angle ) 
  { // step > 0
    _angle = 0.0 ;
  }
  else if( _period.get() != 0.0f )
  {
    _angle += 1.0f / _period.get() * _speed.get() ;
  }
  if ( 1.0f <= _planetAngle ) 
  { // step > 0
    _planetAngle = 0.0 ;
  }
  else if( _planetPeriod.get() != 0.0f )
  {
    _planetAngle += 1.0f / _planetPeriod.get() * _speed.get() ;
  }
  
  // Get the translate and the rotate
  OMK::Type::Transform position ;
  Wm4::Vector3f orientation ;
  position.setTranslate( Wm4::Vector3f( _radius.get() * Wm4::Math<float>::Cos( Wm4::Math<float>::TWO_PI * _angle ),
                                        _radius.get() * Wm4::Math<float>::Sin( Wm4::Math<float>::TWO_PI * _angle ), 
                                        0.0f ) ) ;

  // Calculate the orientation
  Wm4::Matrix3f rotationMatrix( _planetAxis, Wm4::Math<float>::TWO_PI * _planetAngle ) ;
  position.setRotate( position.getRotate() * rotationMatrix ) ;

  // Set the new position
  _position.set( position ) ;
}

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