77 lines
3.0 KiB
C
77 lines
3.0 KiB
C
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2011-2014 Jean-Pierre Charras
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* Copyright (C) 2004-2022 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 3
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file units_scales.h
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*/
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// Inside calculations, units are always meter, Hz, Ohm and Radian
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// These units are not very easy to handle, so we use conversion constants
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#ifndef UNITS_SCALES_H
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#define UNITS_SCALES_H
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#define UNIT_KM 1e3 // km to meter
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#define UNIT_M 1 // m to meter
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#define UNIT_CM 1e-2 // cm to meter
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#define UNIT_MM 1e-3 // mm to meter
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#define UNIT_MICRON 1e-6 // um to meter
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#define UNIT_INCH (1e-2*2.54) // inch to meter
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#define UNIT_MIL (1e-5*2.54) // mil (or thou) to meter
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#define UNIT_FEET 0.3048 // feet to meter
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#define UNIT_OZSQFT (34.40*UNIT_MICRON) // 1 oz/ft^2 is 34.30 microns nominal, 30.90 minimum
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#define UNIT_GHZ 1e9
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#define UNIT_MHZ 1e6
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#define UNIT_KHZ 1e3
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#define UNIT_DEGREE (M_PI/180.0) // degree to radian
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#define UNIT_RADIAN 1.0 // Radian to radian
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#define UNIT_OHM 1.0 // Ohm to Ohm
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#define UNIT_KOHM 1e3 // KOhm to Ohm
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#define UNIT_OHM_PER_METER 1.0 // Ohm per meter to Ohm per meter
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#define UNIT_OHM_PER_KILOMETER 1e-3 // Ohm per kilometer to Ohm per meter
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#define UNIT_OHM_PER_FEET 3.28084 // Ohm per feet to Ohm per meter
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#define UNIT_OHM_PER_1000FEET 3.28084e-3 // Ohm per 1000feet to Ohm per meter
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#define UNIT_KILOVOLT 1e-3 // Kilovolt to Volt
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#define UNIT_VOLT 1.0 // Volt to Volt
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#define UNIT_MILLIVOLT 1e+3 // Millivolt to Volt
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#define UNIT_MEGAWATT 1e-6 // Kilowatt to Watt
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#define UNIT_KILOWATT 1e-3 // Kilowatt to Watt
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#define UNIT_WATT 1.0 // Watt to Watt
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#define UNIT_MILLIWATT 1e+3 // Milliwatt to Watt
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#define UNIT_METER_PER_SECOND 1.0 // meter per second to meter per second
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#define UNIT_KILOMETER_PER_HOUR ( 1 / 3.6 ) // km/h to m/s
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#define UNIT_FEET_PER_SECOND 0.3048 // ft/s to m/s
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#define UNIT_MILES_PER_HOUR 1609.34 // mi/h to m/s
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#define UNIT_SECOND 1.0 // second to second
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#define UNIT_MSECOND 1e-3 // millisecond to second
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#define UNIT_USECOND 1e-6 // microsecond to second
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#define UNIT_NSECOND 1e-9 // nanosecond to second
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#define UNIT_PSECOND 1e-12 // picosecond to second
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#endif // UNITS_SCALES_H
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