117 lines
3.6 KiB
C
117 lines
3.6 KiB
C
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//===========================================================================//
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// Purpose : Declaration and inline definitions for a TC_MinGrid minimum grid
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// singleton class. This class represents a minimum unit grid and
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// handles various transformations between floating-point and
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// integer formats.
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//
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// Inline methods include:
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// - GetGrid
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// - GetUnits
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// - GetMagnitude
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// - GetPrecision
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//
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//===========================================================================//
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#ifndef TC_MIN_GRID_H
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#define TC_MIN_GRID_H
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// Define a default minumum grid
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#define TC_MIN_GRID_DEF 0.001
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//===========================================================================//
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// Purpose : Class declaration
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// Author : Jeff Rudolph
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//---------------------------------------------------------------------------//
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// Version history
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// 05/30/12 jeffr : Original
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//===========================================================================//
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class TC_MinGrid_c
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{
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public:
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static void NewInstance( void );
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static void DeleteInstance( void );
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static TC_MinGrid_c& GetInstance( void );
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void SetGrid( double minGrid );
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double GetGrid( void ) const;
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unsigned int GetUnits( void ) const;
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unsigned int GetMagnitude( void ) const;
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unsigned int GetPrecision( void ) const;
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double IntToFloat( int i ) const;
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double UnsignedIntToFloat( unsigned int i ) const;
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double LongIntToFloat( long int li ) const;
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int FloatToInt( double f ) const;
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unsigned int FloatToUnsignedInt( double f ) const;
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long int FloatToLongInt( double f ) const;
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double SnapToGrid( double f ) const;
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double SnapToGridCeil( double f ) const;
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bool IsOnGrid( double f, double* pf = 0 ) const;
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protected:
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TC_MinGrid_c( void );
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~TC_MinGrid_c( void );
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private:
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// The min grid value is used to define the units, precision, and
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// magnitude values. The following table shows several example min grid
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// values and asso. units, precision, and magnitude values.
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//
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// grid 0.1 0.01 0.001 0.025
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// ----- ----- ----- -----
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// units 10 100 1000 40
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// magnitude 10 100 1000 1000
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// precision 1 2 3 3
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double grid_; // Define min (manufacturing or data) grid
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unsigned int units_; // Define database units per grid
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unsigned int magnitude_; // Define database magnitude per units
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unsigned int precision_; // Define format precision per grid
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static TC_MinGrid_c* pinstance_; // Define ptr for a singleton instance
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};
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//===========================================================================//
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// Purpose : Class inline definition(s)
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// Author : Jeff Rudolph
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//---------------------------------------------------------------------------//
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// Version history
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// 05/30/12 jeffr : Original
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//===========================================================================//
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inline double TC_MinGrid_c::GetGrid(
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void ) const
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{
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return( this->grid_ );
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}
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//===========================================================================//
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inline unsigned int TC_MinGrid_c::GetUnits(
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void ) const
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{
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return( this->units_ );
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}
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//===========================================================================//
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inline unsigned int TC_MinGrid_c::GetPrecision(
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void ) const
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{
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return( this->precision_ );
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}
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//===========================================================================//
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inline unsigned int TC_MinGrid_c::GetMagnitude(
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void ) const
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{
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return( this->magnitude_ );
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}
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#endif
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