KisSprayNormalDistributionPolarDistance Class Reference

Class that can generate normally distributed values. For efficiency, the values will be in the range [0..standardDeviation*5], for polar coordinates distance. More...

#include <KisSprayRandomDistributions.h>

Inheritance diagram for KisSprayNormalDistributionPolarDistance:

Public Member Functions
	KisSprayNormalDistributionPolarDistance ()
	KisSprayNormalDistributionPolarDistance (double mean, double standardDeviation)
Public Member Functions inherited from KisSprayNormalDistribution
	KisSprayNormalDistribution ()
	Construct an invalid KisSprayNormalDistribution.
	KisSprayNormalDistribution (double mean, double standardDeviation)
	Construct a new normal distribution.
Public Member Functions inherited from KisSprayFunctionBasedDistribution
bool	isValid () const
	Return if this object is correctly initialized and can be used to generate values.
	KisSprayFunctionBasedDistribution ()
	Construct an invalid KisSprayFunctionBasedDistribution.
	KisSprayFunctionBasedDistribution (const KisSprayFunctionBasedDistribution &other)
template<typename Function >
	KisSprayFunctionBasedDistribution (int numberOfSamples, double a, double b, Function f)
	Construct a new distribution.
double	max () const
	Return the maximum value that this distribution can produce.
double	min () const
	Return the minimum value that this distribution can produce.
double	operator() (KisRandomSourceSP rs) const
	Get a random value between min and max that follows the distribution.
KisSprayFunctionBasedDistribution &	operator= (const KisSprayFunctionBasedDistribution &rhs)
	~KisSprayFunctionBasedDistribution ()

Additional Inherited Members
Protected Member Functions inherited from KisSprayFunctionBasedDistribution
template<typename Function >
void	initialize (size_t numberOfSamples, double a, double b, Function f)
	Function used to setup the distribution and put it in a valid state. See the constructor for the explanation of the parameters.

Detailed Description

Class that can generate normally distributed values. For efficiency, the values will be in the range [0..standardDeviation*5], for polar coordinates distance.

See also

KisSprayNormalDistribution

Definition at line 153 of file KisSprayRandomDistributions.h.

Constructor & Destructor Documentation

KisSprayNormalDistributionPolarDistance() [1/2]

KisSprayNormalDistributionPolarDistance::KisSprayNormalDistributionPolarDistance

(

)

Definition at line 248 of file KisSprayRandomDistributions.cpp.

{}

KisSprayNormalDistributionPolarDistance() [2/2]

KisSprayNormalDistributionPolarDistance::KisSprayNormalDistributionPolarDistance	(	double	mean,
		double	standardDeviation )

Definition at line 251 of file KisSprayRandomDistributions.cpp.

{
    KIS_SAFE_ASSERT_RECOVER_RETURN(standardDeviation > 0.0);
 
    const double m_c1 = 1.0 / (standardDeviation * std::sqrt(2.0 * M_PI));
    const double m_c2 = 2.0 * standardDeviation * standardDeviation;
    KisSprayFunctionBasedDistribution::initialize(1000, 0.0, standardDeviation * 5.0,
        [mean, m_c1, m_c2](double x)
        {
            const double shiftedX = x - mean;
            return 2.0 * x * m_c1 * std::exp(-(shiftedX * shiftedX / m_c2));
        }
    );
}

References KisSprayFunctionBasedDistribution::initialize(), KIS_SAFE_ASSERT_RECOVER_RETURN, and M_PI.

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The documentation for this class was generated from the following files:

• plugins/paintops/spray/KisSprayRandomDistributions.h
• plugins/paintops/spray/KisSprayRandomDistributions.cpp