[occt.git] / src / Message / Message_ProgressScale.cxx

#include <Message_ProgressScale.ixx>

static const Standard_Real ZERO = 1e-10;
static const Standard_Real INFINITE = 1e100;
  
//=======================================================================
//function : Message_ProgressScale
//purpose  : 
//=======================================================================

Message_ProgressScale::Message_ProgressScale () :
     myMin(0.), myMax(100.), myStep(1.), myInfinite(Standard_False),
     myFirst(0.), myLast(1.)
{
}

//=======================================================================
//function : LocalToBase
//purpose  : 
//=======================================================================

Standard_Real Message_ProgressScale::LocalToBase (const Standard_Real val) const
{
  if ( val <= myMin ) return myFirst;
  if ( myMax - myMin <= ZERO ) return myLast;
  
  if ( ! myInfinite ) {
    if ( val >= myMax ) return myLast;
    return myFirst + ( myLast - myFirst ) * ( val - myMin ) / ( myMax - myMin );
  }
  Standard_Real x = ( val - myMin ) / ( myMax - myMin );
//  return myFirst + ( myLast - myFirst ) * ( 1. - exp ( -x ) ); // exponent
  return myFirst + ( myLast - myFirst ) * x / ( 1. + x );     // hyperbola
}

//=======================================================================
//function : BaseToLocal
//purpose  : 
//=======================================================================

Standard_Real Message_ProgressScale::BaseToLocal (const Standard_Real val) const
{
  if ( myLast - val <= ZERO ) 
    return myInfinite ? INFINITE : myMax;
  if ( ! myInfinite )
    return myMin + ( myMax - myMin ) * ( val - myFirst ) / ( myLast - myFirst );
//  Standard_Real x = log ( ( val - myFirst ) / ( myLast - val ) ); // exponent
  Standard_Real x = ( val - myFirst ) / ( myLast - val );         // hyperbola
  return myMin + x * ( myMax - myMin );
}
Commit	Line	Data
7fd59977	1	#include <Message_ProgressScale.ixx>
	2
	3	static const Standard_Real ZERO = 1e-10;
	4	static const Standard_Real INFINITE = 1e100;
	5
	6	//=======================================================================
	7	//function : Message_ProgressScale
	8	//purpose :
	9	//=======================================================================
	10
	11	Message_ProgressScale::Message_ProgressScale () :
	12	myMin(0.), myMax(100.), myStep(1.), myInfinite(Standard_False),
	13	myFirst(0.), myLast(1.)
	14	{
	15	}
	16
	17	//=======================================================================
	18	//function : LocalToBase
	19	//purpose :
	20	//=======================================================================
	21
	22	Standard_Real Message_ProgressScale::LocalToBase (const Standard_Real val) const
	23	{
	24	if ( val <= myMin ) return myFirst;
	25	if ( myMax - myMin <= ZERO ) return myLast;
	26
	27	if ( ! myInfinite ) {
	28	if ( val >= myMax ) return myLast;
	29	return myFirst + ( myLast - myFirst ) * ( val - myMin ) / ( myMax - myMin );
	30	}
	31	Standard_Real x = ( val - myMin ) / ( myMax - myMin );
	32	// return myFirst + ( myLast - myFirst ) * ( 1. - exp ( -x ) ); // exponent
	33	return myFirst + ( myLast - myFirst ) * x / ( 1. + x ); // hyperbola
	34	}
	35
	36	//=======================================================================
	37	//function : BaseToLocal
	38	//purpose :
	39	//=======================================================================
	40
	41	Standard_Real Message_ProgressScale::BaseToLocal (const Standard_Real val) const
	42	{
	43	if ( myLast - val <= ZERO )
	44	return myInfinite ? INFINITE : myMax;
	45	if ( ! myInfinite )
	46	return myMin + ( myMax - myMin ) * ( val - myFirst ) / ( myLast - myFirst );
	47	// Standard_Real x = log ( ( val - myFirst ) / ( myLast - val ) ); // exponent
	48	Standard_Real x = ( val - myFirst ) / ( myLast - val ); // hyperbola
	49	return myMin + x * ( myMax - myMin );
	50	}