CloudyDay
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earth.h
1 
2 // Copyright (c) 2011-2012, Daniel Müller <dm@g4t3.de>
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29 
30 #pragma once
31 
32 namespace osgCloudyDay
33 {
34  class Earth
35  {
36  public:
37 
38  static const double atmosphericRefraction(const double altitude);
39 
40  static const double viewDistanceWithinAtmosphere(
41  const double y /* height component of the view direction on ground into the sky */
42  , const bool refractionCorrected = false);
43 
44  static const double meanRadius();
45  static double atmosphereThickness(); // if its density were uniform...
46  static const double atmosphereThicknessNonUniform();
47 
48  static const double apparentMagnitudeLimit();
49  };
50 }