C# Class BRDFLafortuneFitting.Program

Datei anzeigen Open project: Patapom/GodComplex

Protected Properties

Property	Type	Description
ALF	double
EPS	double
ITMAX	int
STPMX	double
TOLX	double
TOLY	double

Protected Methods

Method	Description
BRDFMappingGlobalFunctionEval ( double _Coefficients, object _Params ) : double
BRDFMappingGlobalFunctionGradientEval ( double _Coefficients, double _Gradients, object _Params ) : void
BRDFMappingLocalFunctionEval ( double _Coefficients, object _Params ) : double
BRDFMappingLocalFunctionGradientEval ( double _Coefficients, double _Gradients, object _Params ) : void
ENSUREVALID ( double _Coefficients ) : void
LoadBRDF ( FileInfo _BRDFFile ) : double[][]	Loads a MERL BRDF file
SaveAllSlices ( ) : void
dfpmin ( double _Coefficients, double _ConvergenceTolerance, int &_PerformedIterationsCount, BFGSFunctionEval _FunctionEval, BFGSFunctionGradientEval _FunctionGradientEval, object _Params ) : double	Performs BFGS function minimzation on a quadratic form function evaluated by the provided delegate
lnsrch ( int n, double xold, double fold, double g, double p, double x, double &f, double stpmax, int &check, BFGSFunctionEval _FunctionEval, object _Params ) : void

Private Methods

Method	Description
ComputeSummedDifferences ( BRDFSample _Samples, double _Normalizer, double _GoalBDRF, CosineLobe _LobeEstimates ) : double	Computes the square difference between a current cosine lobe estimate and a goal BRDF given a set of samples
FitBRDF ( double _BRDF, CosineLobe _Lobes, CosineLobe _InitialGuesses, double _BFGSConvergenceTolerance, double _RMS, BRDFMappingFeedback _Delegate ) : double	Performs mapping of a BRDF into N sets of cosine lobes coefficients WARNING: Takes hell of a time to compute !
IsValid ( double _BRDFValue ) : bool
LookupBRDF ( double _BRDF, double _ThetaIn, double _PhiIn, double _ThetaOut, double _PhiOut ) : double	Given a pair of incoming/outgoing angles, look up the BRDF.
Main ( string args ) : void
PhiDiff_index ( double _PhiDiff ) : int
ShowProgress ( double _Progress ) : void
ThetaDiff_index ( double _ThetaDiff ) : int
ThetaHalf_index ( double _ThetaHalf ) : int
half_diff_coords_to_std_coords ( double _ThetaHalf, double _PhiHalf, double _ThetaDiff, double _PhiDiff, System.Vector3 &_In, System.Vector3 &_Out ) : void
half_diff_coords_to_std_coords ( double _ThetaHalf, double _PhiHalf, double _ThetaDiff, double _PhiDiff, double &_ThetaIn, double &_PhiIn, double &_ThetaOut, double &_PhiOut ) : void
std_coords_to_half_diff_coords ( double _ThetaIn, double _PhiIn, double _ThetaOut, double _PhiOut, double &_ThetaHalf, double &_PhiHalf, double &_ThetaDiff, double &_PhiDiff ) : void

Method Details

BRDFMappingGlobalFunctionEval() protected static method

protected static BRDFMappingGlobalFunctionEval ( double _Coefficients, object _Params ) : double
_Coefficients	double
_Params	object
return	double

BRDFMappingGlobalFunctionGradientEval() protected static method

protected static BRDFMappingGlobalFunctionGradientEval ( double _Coefficients, double _Gradients, object _Params ) : void
_Coefficients	double
_Gradients	double
_Params	object
return	void

BRDFMappingLocalFunctionEval() protected static method

protected static BRDFMappingLocalFunctionEval ( double _Coefficients, object _Params ) : double
_Coefficients	double
_Params	object
return	double

BRDFMappingLocalFunctionGradientEval() protected static method

protected static BRDFMappingLocalFunctionGradientEval ( double _Coefficients, double _Gradients, object _Params ) : void
_Coefficients	double
_Gradients	double
_Params	object
return	void

ENSUREVALID() protected static method

protected static ENSUREVALID ( double _Coefficients ) : void
_Coefficients	double
return	void

LoadBRDF() protected static method

Loads a MERL BRDF file

protected static LoadBRDF ( FileInfo _BRDFFile ) : double[][]
_BRDFFile	System.IO.FileInfo
return	double[][]

SaveAllSlices() protected static method

protected static SaveAllSlices ( ) : void
return	void

dfpmin() protected static method

Performs BFGS function minimzation on a quadratic form function evaluated by the provided delegate

protected static dfpmin ( double _Coefficients, double _ConvergenceTolerance, int &_PerformedIterationsCount, BFGSFunctionEval _FunctionEval, BFGSFunctionGradientEval _FunctionGradientEval, object _Params ) : double
_Coefficients	double	The array of initial coefficients (indexed from 1!!) that will also contain the resulting coefficients when the routine has converged
_ConvergenceTolerance	double	The tolerance error to accept as the minimum of the function
_PerformedIterationsCount	int	The amount of iterations performed to reach the minimum
_FunctionEval	BFGSFunctionEval	The delegate used to evaluate the function to minimize
_FunctionGradientEval	BFGSFunctionGradientEval	The delegate used to evaluate the gradient of the function to minimize
_Params	object	Some user params passed to the evaluation functions
return	double

lnsrch() protected static method

protected static lnsrch ( int n, double xold, double fold, double g, double p, double x, double &f, double stpmax, int &check, BFGSFunctionEval _FunctionEval, object _Params ) : void
n	int
xold	double
fold	double
g	double
p	double
x	double
f	double
stpmax	double
check	int
_FunctionEval	BFGSFunctionEval
_Params	object
return	void

Property Details

ALF protected_oe static_oe property

protected static double ALF
return	double

EPS protected_oe static_oe property

protected static double EPS
return	double

ITMAX protected_oe static_oe property

protected static int ITMAX
return	int

STPMX protected_oe static_oe property

protected static double STPMX
return	double

TOLX protected_oe static_oe property

protected static double TOLX
return	double

TOLY protected_oe static_oe property

protected static double TOLY
return	double