kicad/include/convert_to_biu.h

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#ifndef CONVERT_TO_BIU_H_
#define CONVERT_TO_BIU_H_
#include <config.h> // USE_PCBNEW_NANOMETRES is defined here
/**
* @file convert_to_biu.h
*/
/**
* @brief some define and functions to convert a value in mils, decimils or mm
* to the internal unit used in pcbnew, cvpcb or gerbview (nanometer or deci-mil)
* depending on compile time option
*/
/// Scaling factor to convert mils to internal units.
#if defined(PCBNEW) || defined(CVPCB) || defined(GERBVIEW)
#if defined( USE_PCBNEW_NANOMETRES )
#if defined(GERBVIEW)
#define IU_PER_MM 1e5 // Gerbview uses 10 micrometer.
#else
#define IU_PER_MM 1e6 // Pcbnew uses nanometers.
#endif
#define IU_PER_MILS (IU_PER_MM * 0.0254)
#define IU_PER_DECIMILS (IU_PER_MM * 0.00254)
#else // Pcbnew compiled for deci-mils.
#define IU_PER_DECIMILS 1
#define IU_PER_MILS 10.0
#define IU_PER_MM (1e4 / 25.4)
#endif
/// Convert mils to PCBNEW internal units (iu).
inline int Mils2iu( int mils )
{
#if defined( USE_PCBNEW_NANOMETRES )
double x = mils * IU_PER_MILS;
return int( x < 0 ? x - 0.5 : x + 0.5 );
#else
return mils * IU_PER_MILS;
#endif
}
/// Convert deci-mils to PCBNEW internal units (iu).
inline int DMils2iu( int dmils )
{
#if defined( USE_PCBNEW_NANOMETRES )
double x = dmils * IU_PER_DECIMILS;
return int( x < 0 ? x - 0.5 : x + 0.5 );
#else
return dmils;
#endif
}
#else // Eeschema and anything else.
#define IU_PER_DECIMILS 0.1
#define IU_PER_MILS 1.0
#define IU_PER_MM (IU_PER_MILS / 0.0254)
inline int Mils2iu( int mils )
{
return mils;
}
#endif
/// Convert mm to internal units (iu).
inline int Millimeter2iu( double mm )
{
return (int) ( mm < 0 ? mm * IU_PER_MM - 0.5 : mm * IU_PER_MM + 0.5);
}
#endif // CONVERT_TO_BIU_H_