Isis::LineEquation Class Reference

Utility class for creating and using cartesean line equations. More...

#include <LineEquation.h>

Collaboration diagram for Isis::LineEquation:

Public Member Functions
	LineEquation ()
	Constructors.
	LineEquation (double x1, double y1, double x2, double y2)
	Construct and fill LineEquation object.
	~LineEquation ()
	Destroys the LineEquation object.
void	AddPoint (double x, double y)
	Add a point to the object.
double	Slope ()
	Compute the slope of the line.
double	Intercept ()
	Compute the intercept of the line.
int	Points ()
bool	HaveSlope ()
bool	HaveIntercept ()
bool	Defined ()

Private Attributes
std::vector< double >	p_x
	Independent variables.
std::vector< double >	p_y
	Dependent variables.
bool	p_defined
	Variable indicating if line is defined yet.
bool	p_slopeDefined
	Variable indicating if slope is defined yet.
bool	p_interceptDefined
	Variable indicating if intercept is defined yet.
double	p_slope
double	p_intercept

Detailed Description

Utility class for creating and using cartesean line equations.

This class contains utility methods for creating and using cartesean line equations. If both points have the same value for the independent variable (vertical line) an error is thrown.

Author

2006-10-19 Debbie A. Cook

Todo:

Add constructor with arguments (double slope, double intercept) Add method to double y = EvaluateLine( double x )

Definition at line 44 of file LineEquation.h.

Constructor & Destructor Documentation

Isis::LineEquation::LineEquation

(

)

Constructors.

Construct an empty LineEquation object.

Definition at line 35 of file LineEquation.cpp.

Isis::LineEquation::LineEquation	(	double	x1,
		double	y1,
		double	x2,
		double	y2
	)

Construct and fill LineEquation object.

Parameters

x1	Double First independent variable
y1	Double First dependent variable
x2	Double Second independent variable
y2	Double Second dependent variable

Definition at line 48 of file LineEquation.cpp.

Isis::LineEquation::~LineEquation ( )

inline

Destroys the LineEquation object.

Definition at line 51 of file LineEquation.h.

Member Function Documentation

void Isis::LineEquation::AddPoint	(	double	x,
		double	y
	)

Add a point to the object.

The object is considered filled once 2 points have been added (the line is defined).

Parameters

x	Double Independent variable
y	Double Dependent variable

Definition at line 67 of file LineEquation.cpp.

References _FILEINFO_.

double Isis::LineEquation::Intercept

(

)

Compute the intercept of the line.

Returns

double The y-intercept of the line if it exists

Definition at line 102 of file LineEquation.cpp.

References _FILEINFO_.

Referenced by Isis::SpicePosition::SetPolynomial(), and Isis::SpiceRotation::SetPolynomial().

double Isis::LineEquation::Slope

(

)

Compute the slope of the line.

Returns

double The slope of the line if it exists

Definition at line 82 of file LineEquation.cpp.

References _FILEINFO_.

Referenced by Isis::SpicePosition::SetPolynomial(), and Isis::SpiceRotation::SetPolynomial().

Member Data Documentation

bool Isis::LineEquation::p_defined

private

Variable indicating if line is defined yet.

Definition at line 71 of file LineEquation.h.

bool Isis::LineEquation::p_interceptDefined

private

Variable indicating if intercept is defined yet.

Definition at line 73 of file LineEquation.h.

bool Isis::LineEquation::p_slopeDefined

private

Variable indicating if slope is defined yet.

Definition at line 72 of file LineEquation.h.

std::vector<double> Isis::LineEquation::p_x

private

Independent variables.

Definition at line 66 of file LineEquation.h.

std::vector<double> Isis::LineEquation::p_y

private

Dependent variables.

Definition at line 70 of file LineEquation.h.

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

• src/base/objs/LineEquation/LineEquation.h
• src/base/objs/LineEquation/LineEquation.cpp