C# Class BRDFLafortuneFitting.Program

Show file 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 static property

protected static double ALF
return	double

EPS protected static property

protected static double EPS
return	double

ITMAX protected static property

protected static int ITMAX
return	int

STPMX protected static property

protected static double STPMX
return	double

TOLX protected static property

protected static double TOLX
return	double

TOLY protected static property

protected static double TOLY
return	double