WXP::GTran Class Reference

This class creates device independent coordinate systems. More...

#include "../include/GTran.h"

List of all members.

Public Member Functions
	GTran ()
	GTran (Rect rect)
	~GTran ()
int	set (Rect rect)
int	resize (Rect rect)
float	windowNdcX (float x)
float	windowNdcY (float y)
float	windowPlotX (float x)
float	windowPlotY (float y)
float	plotWindowX (float x)
float	plotWindowY (float y)
float	ndcPlotX (float x)
float	ndcPlotY (float y)
Rect	getClipRect ()
bool	pointsInWindow (int num, Point *pts)
bool	pointsInWindow (Points &pts)
int	getWindow (Rect &rect)
Rect	getWindow ()
int	getViewport (Rect &rect)
Rect	getViewport ()
int	getNdc (Rect &rect)
Rect	getNdc ()
int	setWindow (Rect rect)
int	setViewport (Rect rect)
int	print ()
Static Public Member Functions
static float	windowTranslateX (GTran gtran1, GTran gtran2, float x)
static float	windowTranslateY (GTran gtran1, GTran gtran2, float x)

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Detailed Description

This class creates device independent coordinate systems.

Author:

Dan Vietor

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Constructor & Destructor Documentation

GTran::GTran

(

)

Constructor. Initializes the class values

GTran::GTran

(

Rect

rect

)

Constructor. Sets extent of space

Parameters:

rect

Rect class defining extent

GTran::~GTran

(

)

Destructor

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Member Function Documentation

Rect GTran::getClipRect

(

)

Gets the current clip rectangle in device plot space

Returns:

Rect class with clip rectangle values

References ndcPlotX(), and ndcPlotY().

Rect GTran::getNdc

(

)

Gets the normalized device coordinate extent

Returns:

Rect class with NDC extent

int GTran::getNdc

(

Rect &

rect

)

Gets the normalized device coordinate extent

Return values:

rect

Rect class to put NDC extent

Referenced by WXP::Graph::setViewportAspect().

Rect GTran::getViewport

(

)

Gets the current viewport coordinates

Returns:

Rect class with viewport extent in NDC space

int GTran::getViewport

(

Rect &

rect

)

Gets the current viewport coordinates

Return values:

rect

Rect class to put viewport extent in NDC space

Referenced by WXP::Graph::getViewport().

Rect GTran::getWindow

(

)

Gets the current window/world coordinates

Returns:

Rect class with window extent

int GTran::getWindow

(

Rect &

rect

)

Gets the current window/world coordinates

Return values:

rect

Rect class to put window extent

Referenced by WXP::Graph::getWindow(), and WXP::Graph::setFontSpec().

float GTran::ndcPlotX

(

float

x

)

Translates normalized device coordinates to device plot coordinates for X

Parameters:

x

X coordinate to translate

Returns:

X in plot space

References WXP::Point::x.

Referenced by getClipRect().

float GTran::ndcPlotY

(

float

y

)

Translates normalized device coordinates to device plot coordinates for Y

Parameters:

y

Y coordinate to translate

Returns:

Y in plot space

References WXP::Point::y.

Referenced by getClipRect().

float GTran::plotWindowX

(

float

x

)

Translates device plot coordinates to world coordinates for X

Parameters:

x

X coordinate to translate

Returns:

X in world space

References WXP::Point::x.

Referenced by WXP::Graph::tranPlotWindow(), and WXP::Graph::tranWindow().

float GTran::plotWindowY

(

float

y

)

Translates device plot coordinates to world coordinates for Y

Parameters:

y

Y coordinate to translate

Returns:

Y in world space

References WXP::Point::y.

Referenced by WXP::Graph::tranPlotWindow(), and WXP::Graph::tranWindow().

bool GTran::pointsInWindow

(

Points &

pts

)

Checks to see if all the values are within the current viewport

Parameters:

pts

Points class

Returns:

true if all points within viewport

References WXP::Points::getNum().

bool GTran::pointsInWindow	(	int	num,
		Point *	pts
	)

Checks to see if all the values are within the current viewport

Parameters:

	num_pt	Number of points in the array
	pts	Point array

Returns:

true if all points within viewport

References WXP::Point::x, and WXP::Point::y.

int GTran::resize

(

Rect

rect

)

Resizes the translation space

Parameters:

rect

New space extent

References WXP::Point::x, and WXP::Point::y.

int GTran::set

(

Rect

rect

)

Sets up the transformation

Parameters:

rect

Defines extent of space

References WXP::Point::x, and WXP::Point::y.

int GTran::setViewport

(

Rect

rect

)

Sets the viewport coordinate extent in NDC space

Parameters:

rect

Rect clas with viewport extent

References WXP::Point::x, and WXP::Point::y.

Referenced by WXP::Graph::setViewport(), and WXP::Graph::setViewportAspect().

int GTran::setWindow

(

Rect

rect

)

Sets the window coordinate extent

Parameters:

rect

Rect class with window extent

References WXP::Point::x, and WXP::Point::y.

Referenced by WXP::Graph::setWindow().

float GTran::windowNdcX

(

float

x

)

Translates world coordinates to normalizes device coordinates for X

Parameters:

x

X coordinate to translate

Returns:

X in NDC space

References WXP::Point::x.

float GTran::windowNdcY

(

float

y

)

Translates world coordinates to normalizes device coordinates for Y

Parameters:

y

Y coordinate to translate

Returns:

Y in NDC space

References WXP::Point::y.

float GTran::windowPlotX

(

float

x

)

Translates world coordinates to device plot coordinates for X

Parameters:

x

X coordinate to translate

Returns:

X in device plot space

References WXP::Point::x.

Referenced by WXP::Graph::drawImage(), WXP::Graph::drawMark(), WXP::Graph::drawText(), and WXP::Graph::tranWindow().

float GTran::windowPlotY

(

float

y

)

Translates world coordinates to device plot coordinates for Y

Parameters:

y

Y coordinate to translate

Returns:

Y in device plot space

References WXP::Point::y.

Referenced by WXP::Graph::drawImage(), WXP::Graph::drawMark(), WXP::Graph::drawText(), and WXP::Graph::tranWindow().

float GTran::windowTranslateX	(	GTran	gtran1,
		GTran	gtran2,
		float	x
	)			[static]

Translates between two translation spaces in X

Parameters:

	gtran1	Input translation space
	gtran2	Output translation space
	x	X world coordinate to translate

Returns:

X in world space for new translation

float GTran::windowTranslateY	(	GTran	gtran1,
		GTran	gtran2,
		float	y
	)			[static]

Translates between two translation spaces in Y

Parameters:

	gtran1	Input translation space
	gtran2	Output translation space
	y	Y world coordinate to translate

Returns:

Y in world space for new translation

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

• GTran.h
• GTran.cc