kicad/pcb_calculator/units_scales.h

28 lines
777 B
C

/*
* @file units_scales.h
*/
// Inside calculations, units are always meter, Hz, Ohm and Radian
// These units are not very easy to handle, so we use conversion constants
#ifndef UNITS_SCALES_H
#define UNITS_SCALES_H
#define UNIT_MM 1e-3 // mm to meter
#define UNIT_CM 1e-2 // cm to meter
#define UNIT_MICRON 1e-6 // um to meter
#define UNIT_INCH (1e-2*2.54) // inch to meter
#define UNIT_MIL (1e-5*2.54) // mil (or thou) to meter
#define UNIT_GHZ 1e9
#define UNIT_MHZ 1e6
#define UNIT_KHZ 1e3
#define UNIT_DEGREE (M_PI/180.0) // degree to radian
#define UNIT_RADIAN 1.0 // Radian to radian
#define UNIT_OHM 1.0 // Ohm to Ohm
#define UNIT_KOHM 1e3 // KOhm to Ohm
#endif // UNITS_SCALES_H