Grid Class Reference

#include <fgrid.h>

Collaboration diagram for Grid:

Public Member Functions
	Grid (UserFunction *function)
	~Grid ()
void	SetFunctionBounderies (double minX, double maxX)
void	SetScreenBounderues (int minX, int maxX, int minY, int maxY)
void	GetScreenCoordinates (double value, int *x, int *y) const
void	GetScreenCoordinates (double xval, int *x, double yval, int *y) const
double	GetHorizontalResolution () const
void	GetXAxis (int *xstart, int *xend, int *ystart, int *yend) const
void	GetYAxis (int *xstart, int *xend, int *ystart, int *yend) const

Private Member Functions
double	FunctionValue (double parameter) const

Private Attributes
UserFunction *	function
RealNumber *	parameter
double	minX
double	maxX
double	minY
double	maxY
int	pad
int	screenMinX
int	screenMaxX
int	screenMinY
int	screenMaxY
int	originX
int	originY
double	zoom
double	scaleX
double	scaleY

Detailed Description

Definition at line 42 of file fgrid.h.

Constructor & Destructor Documentation

Grid()

Grid::Grid ( UserFunction *  function )

explicit

Definition at line 33 of file fgrid.cpp.

References function, pad, parameter, RealNumber::RealNumber(), and zoom.

Referenced by PlotStatement::Execute().

                                 :
    function(function)
{
    parameter = new RealNumber();
    zoom = 1.0;
    pad = 8;
}

Here is the call graph for this function:

Here is the caller graph for this function:

~Grid()

Grid::~Grid

(

)

Definition at line 41 of file fgrid.cpp.

References parameter.

{
    delete parameter;
}

Member Function Documentation

FunctionValue()

double Grid::FunctionValue ( double  parameter ) const

private

Definition at line 83 of file fgrid.cpp.

References Variable::AssignValue(), ExpressionNode::Evaluate(), function, UserFunction::GetExpression(), Number::GetRealValue(), UserFunction::GetVariable(), parameter, and RealNumber::SetRealValue().

Referenced by GetScreenCoordinates(), and SetFunctionBounderies().

{
    this->parameter->SetRealValue(parameter);
    function->GetVariable()->AssignValue(this->parameter);
    Number* res = function->GetExpression()->Evaluate();
    double value = res->GetRealValue();
    return value;
}

Here is the call graph for this function:

Here is the caller graph for this function:

GetHorizontalResolution()

double Grid::GetHorizontalResolution

(

)

const

Definition at line 46 of file fgrid.cpp.

References maxX, minX, screenMaxX, and screenMinX.

Referenced by PlotStatement::Execute().

{
    return (maxX - minX) / (screenMaxX - screenMinX);
}

Here is the caller graph for this function:

GetScreenCoordinates() [1/2]

void Grid::GetScreenCoordinates	(	double	value,
		int *	x,
		int *	y
	)		const

Definition at line 92 of file fgrid.cpp.

References FunctionValue(), originX, originY, scaleX, scaleY, screenMaxX, screenMaxY, screenMinX, screenMinY, and zoom.

Referenced by PlotStatement::Execute().

{
    double valueX = value * scaleX * zoom + originX;
    double valueY = FunctionValue(value) * scaleY * zoom + originY;

    *x = valueX < screenMinX || valueX > screenMaxX ? -1 : static_cast<int>(valueX);
    *y = valueY < screenMinY || valueY > screenMaxY ? -1 : static_cast<int>(valueY);
}

Here is the call graph for this function:

Here is the caller graph for this function:

GetScreenCoordinates() [2/2]

void Grid::GetScreenCoordinates	(	double	xval,
		int *	x,
		double	yval,
		int *	y
	)		const

Definition at line 101 of file fgrid.cpp.

References originX, originY, scaleX, scaleY, screenMaxX, screenMaxY, screenMinX, screenMinY, and zoom.

{
    double valueX = xval * scaleX * zoom + originX;
    double valueY = yval * scaleY * zoom + originY;

    *x = valueX < screenMinX || valueX > screenMaxX ? -1 : static_cast<int>(valueX);
    *y = valueY < screenMinY || valueY > screenMaxY ? -1 : static_cast<int>(valueY);
}

GetXAxis()

void Grid::GetXAxis	(	int *	xstart,
		int *	xend,
		int *	ystart,
		int *	yend
	)		const

Definition at line 110 of file fgrid.cpp.

References originY, screenMaxX, and screenMinX.

{
    *xstart = screenMinX;
    *xend = screenMaxX;
    *ystart = originY;
    *yend = originY;
}

GetYAxis()

void Grid::GetYAxis	(	int *	xstart,
		int *	xend,
		int *	ystart,
		int *	yend
	)		const

Definition at line 118 of file fgrid.cpp.

References originX, screenMaxY, and screenMinY.

{
    *xstart = originX;
    *xend = originX;
    *ystart = screenMinY;
    *yend = screenMaxY;
}

SetFunctionBounderies()

void Grid::SetFunctionBounderies	(	double	minX,
		double	maxX
	)

Definition at line 51 of file fgrid.cpp.

References FunctionValue(), maxX, maxY, minX, minY, scaleX, scaleY, screenMaxX, screenMaxY, screenMinX, and screenMinY.

Referenced by PlotStatement::Execute().

{
    this->minX = minX;
    this->maxX = maxX;
    minY = FunctionValue(minX);
    maxY = FunctionValue(maxX);

    scaleX = (screenMaxX - screenMinX) / (maxX - minX);
    scaleY = (screenMaxY - screenMinY) / (maxY - minY);

    // Keep aspect ratio
    if (scaleX < scaleY)
    {
        scaleX = scaleY;
    }
    else
    {
        scaleY = scaleX;
    }
}

Here is the call graph for this function:

Here is the caller graph for this function:

SetScreenBounderues()

void Grid::SetScreenBounderues	(	int	minX,
		int	maxX,
		int	minY,
		int	maxY
	)

Definition at line 72 of file fgrid.cpp.

References originX, originY, pad, screenMaxX, screenMaxY, screenMinX, and screenMinY.

Referenced by PlotStatement::Execute().

{
    screenMinX = minX + pad;
    screenMaxX = maxX - pad;
    screenMinY = minY + pad;
    screenMaxY = maxY - pad;

    originX = (screenMaxX - screenMinX) / 2;
    originY = (screenMaxY - screenMinY) / 2;
}

Here is the caller graph for this function:

Member Data Documentation

function

UserFunction* Grid::function

private

Definition at line 59 of file fgrid.h.

Referenced by FunctionValue(), and Grid().

maxX

double Grid::maxX

private

Definition at line 63 of file fgrid.h.

Referenced by GetHorizontalResolution(), and SetFunctionBounderies().

maxY

double Grid::maxY

private

Definition at line 65 of file fgrid.h.

Referenced by SetFunctionBounderies().

minX

double Grid::minX

private

Definition at line 62 of file fgrid.h.

Referenced by GetHorizontalResolution(), and SetFunctionBounderies().

minY

double Grid::minY

private

Definition at line 64 of file fgrid.h.

Referenced by SetFunctionBounderies().

originX

int Grid::originX

private

Definition at line 73 of file fgrid.h.

Referenced by GetScreenCoordinates(), GetYAxis(), and SetScreenBounderues().

originY

int Grid::originY

private

Definition at line 74 of file fgrid.h.

Referenced by GetScreenCoordinates(), GetXAxis(), and SetScreenBounderues().

pad

int Grid::pad

private

Definition at line 67 of file fgrid.h.

Referenced by Grid(), and SetScreenBounderues().

parameter

RealNumber* Grid::parameter

private

Definition at line 60 of file fgrid.h.

Referenced by FunctionValue(), Grid(), and ~Grid().

scaleX

double Grid::scaleX

private

Definition at line 76 of file fgrid.h.

Referenced by GetScreenCoordinates(), and SetFunctionBounderies().

scaleY

double Grid::scaleY

private

Definition at line 77 of file fgrid.h.

Referenced by GetScreenCoordinates(), and SetFunctionBounderies().

screenMaxX

int Grid::screenMaxX

private

Definition at line 69 of file fgrid.h.

Referenced by GetHorizontalResolution(), GetScreenCoordinates(), GetXAxis(), SetFunctionBounderies(), and SetScreenBounderues().

screenMaxY

int Grid::screenMaxY

private

Definition at line 71 of file fgrid.h.

Referenced by GetScreenCoordinates(), GetYAxis(), SetFunctionBounderies(), and SetScreenBounderues().

screenMinX

int Grid::screenMinX

private

Definition at line 68 of file fgrid.h.

Referenced by GetHorizontalResolution(), GetScreenCoordinates(), GetXAxis(), SetFunctionBounderies(), and SetScreenBounderues().

screenMinY

int Grid::screenMinY

private

Definition at line 70 of file fgrid.h.

Referenced by GetScreenCoordinates(), GetYAxis(), SetFunctionBounderies(), and SetScreenBounderues().

zoom

double Grid::zoom

private

Definition at line 75 of file fgrid.h.

Referenced by GetScreenCoordinates(), and Grid().

---

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

• src/main/fgrid.h
• src/main/fgrid.cpp