public AtmosphereCalculator( Point3 cameraPos, AtmosphereCalculatorModel model )
{
m_CameraPos = cameraPos;
m_Model = model;
m_Inner = new Sphere3( Point3.Origin, model.PlanetRadius );
m_Outer = new Sphere3( Point3.Origin, model.AtmosphereRadius );
float heightRange = model.AtmosphereRadius - model.PlanetRadius;
m_InvRH0 = -1.0f / ( heightRange * model.RayleighDensityScaleHeightFraction );
m_InvMH0 = -1.0f / ( heightRange * model.MieDensityScaleHeightFraction );
}
/// <summary>
/// Sets up stored and derived parameters from an atmosphere model
/// </summary>
/// <remarks>
/// The inner radius is diminished by a constant amount, because otherwise, the quantised
/// view directions hit the inner sphere and cause a blue band to appear when the actual
/// view direction approaches it.
/// </remarks>
private void SetupModelAndParameters( AtmosphereBuildParameters parameters, AtmosphereBuildModel model )
{
m_RayleighCoefficients = ( float[] )model.RayleighCoefficients.Clone( );
m_MieCoefficients = ( float[] )model.MieCoefficients.Clone( );
m_InnerRadius = model.InnerRadiusMetres;
m_OuterRadius = model.InnerRadiusMetres + model.AtmosphereThicknessMetres;
m_InnerSphere = new Sphere3( Point3.Origin, m_InnerRadius * model.GroundRadiusMultiplier ); // NOTE: AP: See remarks
m_OuterSphere = new Sphere3( Point3.Origin, m_OuterRadius );
m_AttenuationSamples = parameters.AttenuationSamples;
float heightRange = ( m_OuterRadius - m_InnerRadius );
m_InvRH0 = -1.0f / ( heightRange * model.RayleighDensityScaleHeightFraction );
m_InvMH0 = -1.0f / ( heightRange * model.MieDensityScaleHeightFraction );
m_InscatterDistanceFudgeFactor = model.InscatterDistanceFudgeFactor;
m_OutscatterDistanceFudgeFactor = model.OutscatterDistanceFudgeFactor;
m_MieFudge = model.MieFudgeFactor;
m_RayleighFudge = model.RayleighFudgeFactor;
m_OutscatterFudge = model.OutscatterFudgeFactor;
}
