9e216da9ef
After go1.16, go will use module mode by default, even when the repository is checked out under GOPATH or in a one-off directory. Add go.mod, go.sum to keep this repo buildable without opting out of the module mode. > go mod init github.com/mmcgrana/gobyexample > go mod tidy > go mod vendor In module mode, the 'vendor' directory is special and its contents will be actively maintained by the go command. pygments aren't the dependency the go will know about, so it will delete the contents from vendor directory. Move it to `third_party` directory now. And, vendor the blackfriday package. Note: the tutorial contents are not affected by the change in go1.16 because all the examples in this tutorial ask users to run the go command with the explicit list of files to be compiled (e.g. `go run hello-world.go` or `go build command-line-arguments.go`). When the source list is provided, the go command does not have to compute the build list and whether it's running in GOPATH mode or module mode becomes irrelevant.
159 lines
6.1 KiB
Plaintext
159 lines
6.1 KiB
Plaintext
within Modelica;
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package Constants
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"Library of mathematical constants and constants of nature (e.g., pi, eps, R, sigma)"
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import SI = Modelica.SIunits;
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import NonSI = Modelica.SIunits.Conversions.NonSIunits;
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extends Modelica.Icons.Library2;
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// Mathematical constants
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final constant Real e=Modelica.Math.exp(1.0);
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final constant Real pi=2*Modelica.Math.asin(1.0); // 3.14159265358979;
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final constant Real D2R=pi/180 "Degree to Radian";
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final constant Real R2D=180/pi "Radian to Degree";
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// Machine dependent constants
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// (the definition is a temporary fix since not adapted to the
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// machine where the Modelica translator is running)
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final constant Real eps=1.e-15 "Biggest number such that 1.0 + eps = 1.0";
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final constant Real small=1.e-60
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"Smallest number such that small and -small are representable on the machine";
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final constant Real inf=1.e+60
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"Biggest Real number such that inf and -inf are representable on the machine";
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final constant Integer Integer_inf=2147483647
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"Biggest Integer number such that Integer_inf and -Integer_inf are representable on the machine";
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// Constants of nature
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// (name, value, description from http://physics.nist.gov/cuu/Constants/)
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final constant SI.Velocity c=299792458 "Speed of light in vacuum";
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final constant SI.Acceleration g_n=9.80665
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"Standard acceleration of gravity on earth";
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final constant Real G(final unit="m3/(kg.s2)") = 6.6742e-11
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"Newtonian constant of gravitation";
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final constant SI.FaradayConstant F = 9.64853399e4 "Faraday constant, C/mol";
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final constant Real h(final unit="J.s") = 6.6260693e-34 "Planck constant";
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final constant Real k(final unit="J/K") = 1.3806505e-23 "Boltzmann constant";
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final constant Real R(final unit="J/(mol.K)") = 8.314472 "Molar gas constant";
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final constant Real sigma(final unit="W/(m2.K4)") = 5.670400e-8
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"Stefan-Boltzmann constant";
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final constant Real N_A(final unit="1/mol") = 6.0221415e23
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"Avogadro constant";
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final constant Real mue_0(final unit="N/A2") = 4*pi*1.e-7 "Magnetic constant";
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final constant Real epsilon_0(final unit="F/m") = 1/(mue_0*c*c)
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"Electric constant";
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final constant NonSI.Temperature_degC T_zero=-273.15
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"Absolute zero temperature";
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annotation (
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Documentation(info="<html>
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<p>
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This package provides often needed constants from mathematics, machine
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dependent constants and constants from nature. The latter constants
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(name, value, description) are from the following source:
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</p>
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<dl>
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<dt>Peter J. Mohr and Barry N. Taylor (1999):</dt>
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<dd><b>CODATA Recommended Values of the Fundamental Physical Constants: 1998</b>.
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Journal of Physical and Chemical Reference Data, Vol. 28, No. 6, 1999 and
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Reviews of Modern Physics, Vol. 72, No. 2, 2000. See also <a href=
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\"http://physics.nist.gov/cuu/Constants/\">http://physics.nist.gov/cuu/Constants/</a></dd>
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</dl>
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<p>CODATA is the Committee on Data for Science and Technology.</p>
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<dl>
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<dt><b>Main Author:</b></dt>
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<dd><a href=\"http://www.robotic.dlr.de/Martin.Otter/\">Martin Otter</a><br>
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Deutsches Zentrum für Luft und Raumfahrt e. V. (DLR)<br>
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Oberpfaffenhofen<br>
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Postfach 11 16<br>
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D-82230 Weßling<br>
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email: <a href=\"mailto:Martin.Otter@dlr.de\">Martin.Otter@dlr.de</a></dd>
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</dl>
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<p>
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Copyright © 1998-2009, Modelica Association and DLR.
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</p>
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<p>
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<i>This Modelica package is <b>free</b> software; it can be redistributed and/or modified
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under the terms of the <b>Modelica license</b>, see the license conditions
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and the accompanying <b>disclaimer</b>
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<a href=\"Modelica://Modelica.UsersGuide.ModelicaLicense\">here</a>.</i>
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</p><br>
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</html>
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", revisions="<html>
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<ul>
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<li><i>Nov 8, 2004</i>
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by <a href=\"http://www.robotic.dlr.de/Christian.Schweiger/\">Christian Schweiger</a>:<br>
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Constants updated according to 2002 CODATA values.</li>
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<li><i>Dec 9, 1999</i>
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by <a href=\"http://www.robotic.dlr.de/Martin.Otter/\">Martin Otter</a>:<br>
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Constants updated according to 1998 CODATA values. Using names, values
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and description text from this source. Included magnetic and
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electric constant.</li>
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<li><i>Sep 18, 1999</i>
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by <a href=\"http://www.robotic.dlr.de/Martin.Otter/\">Martin Otter</a>:<br>
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Constants eps, inf, small introduced.</li>
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<li><i>Nov 15, 1997</i>
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by <a href=\"http://www.robotic.dlr.de/Martin.Otter/\">Martin Otter</a>:<br>
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Realized.</li>
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</ul>
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</html>"),
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Invisible=true,
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Icon(coordinateSystem(preserveAspectRatio=true, extent={{-100,-100},{100,
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100}}), graphics={
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Line(
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points={{-2,-38},{2,-46},{8,-56},{14,-64}},
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Diagram(graphics={
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Rectangle(
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Polygon(
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Polygon(
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fillColor={235,235,235},
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fillPattern=FillPattern.Solid,
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lineColor={0,0,255}),
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Text(
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extent={{210,302},{370,272}},
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lineColor={160,160,164},
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fillColor={0,0,0},
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fillPattern=FillPattern.Solid,
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textString="Library"),
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Line(
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thickness=1),
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Text(
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extent={{152,412},{458,334}},
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lineColor={255,0,0},
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textString="Modelica.Constants")}));
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end Constants;
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