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