/// <summary>
/// Initialize the lobe model parameters
/// </summary>
/// <param name="_lobeType">Type of lobe to fit</param>
/// <param name="_incomingDirection">Incoming light direction, pointing TOWARD the surface (Z-up)</param>
/// <param name="_theta">Initial lobe theta angle</param>
/// <param name="_roughness">Initial lobe roughness</param>
/// <param name="_scale">Initial lobe scale</param>
/// <param name="_flatteningFactor">Initial lobe flattening</param>
/// <param name="_MaskingImportance">Initial lobe masking/shadowing importance</param>
/// <param name="_oversizeFactor">Simulation oversize factor. A value of 1 makes the lobe fit exactly, a value higher than one will make the fit lobe smaller than the simulated data, a value lower than one will make the lob larger than the simulated data</param>
/// <param name="_fitUsingCenterOfMass">If true, the fitting distance is measured against a sphere centered on the Center of Mass rather than the (0,0,0) origin. Precision is usually better when using this option.</param>
public void InitLobeData(LOBE_TYPE _lobeType,
float3 _incomingDirection,
double _theta,
double _roughness,
double _scale,
double _flatteningFactor,
double _maskingImportance,
double _oversizeFactor,
bool _fitUsingCenterOfMass)
{
// =========================================================================
// Setup initial parameters
m_lobeType = _lobeType;
if (m_lobeType == LOBE_TYPE.MODIFIED_PHONG_ANISOTROPIC)
{
m_flatteningEval = EvalAnisotropicFlattening;
}
else
{
m_flatteningEval = EvalIsotropicFlattening;
}
m_direction = _incomingDirection;
m_direction.z = -m_direction.z; // Mirror against surface to obtain reflected direction against which we'll compute masking/shadowing of incoming ray
double incomingPhi = Math.Atan2(m_direction.y, m_direction.x);
m_incomingDirection_CosPhi = Math.Cos(incomingPhi);
m_incomingDirection_SinPhi = Math.Sin(incomingPhi);
m_oversizeFactor = _oversizeFactor;
m_fitUsingCenterOfMass = _fitUsingCenterOfMass;
Parameters = new double[] { _theta, _roughness, _scale, _flatteningFactor, _maskingImportance };
}
/// <summary>
/// Initialize the lobe model parameters
/// </summary>
/// <param name="_lobeType">Type of lobe to fit</param>
/// <param name="_incomingDirection">Incoming light direction, pointing TOWARD the surface (Z-up)</param>
/// <param name="_theta">Initial lobe theta angle</param>
/// <param name="_roughness">Initial lobe roughness</param>
/// <param name="_scale">Initial lobe scale</param>
/// <param name="_flatteningFactor">Initial lobe flattening</param>
/// <param name="_MaskingImportance">Initial lobe masking/shadowing importance</param>
/// <param name="_oversizeFactor">Simulation oversize factor. A value of 1 makes the lobe fit exactly, a value higher than one will make the fit lobe smaller than the simulated data, a value lower than one will make the lob larger than the simulated data</param>
/// <param name="_fitUsingCenterOfMass">If true, the fitting distance is measured against a sphere centered on the Center of Mass rather than the (0,0,0) origin. Precision is usually better when using this option.</param>
public void InitLobeData( LOBE_TYPE _lobeType,
float3 _incomingDirection,
double _theta,
double _roughness,
double _scale,
double _flatteningFactor,
double _maskingImportance,
double _oversizeFactor,
bool _fitUsingCenterOfMass )
{
// =========================================================================
// Setup initial parameters
m_lobeType = _lobeType;
if ( m_lobeType == LOBE_TYPE.MODIFIED_PHONG_ANISOTROPIC )
m_flatteningEval = EvalAnisotropicFlattening;
else
m_flatteningEval = EvalIsotropicFlattening;
m_direction = _incomingDirection;
m_direction.z = -m_direction.z; // Mirror against surface to obtain reflected direction against which we'll compute masking/shadowing of incoming ray
double incomingPhi = Math.Atan2( m_direction.y, m_direction.x );
m_incomingDirection_CosPhi = Math.Cos( incomingPhi );
m_incomingDirection_SinPhi = Math.Sin( incomingPhi );
m_oversizeFactor = _oversizeFactor;
m_fitUsingCenterOfMass = _fitUsingCenterOfMass;
Parameters = new double[] { _theta, _roughness, _scale, _flatteningFactor, _maskingImportance };
}