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IMG_Line Class Reference

A line from a start to an end point. More...

#include <IMG_Line.h>

List of all members.

Public Methods
	IMG_Line (TInt32 xs=0,TInt32 ys=0,TInt32 xe=0,TInt32 ye=0)
	Constructs a line with the given values. More...
	IMG_Line (const IMG_Line &l)
	Copy constructor. More...
virtual	~IMG_Line ()
	Destructor.
virtual float	getLength ()const
	Access to line length. More...
virtual void	set (TInt32 xs,TInt32 ys,TInt32 xe,TInt32 ye)
	Sets all members of the line. More...
virtual bool	isEmpty ()const
	Returns whether this line is empty. More...
virtual void	getPoint (float t,TInt32 &x,TInt32 &y)const
	Returns point at given value for line parameter. More...
Public Attributes
TInt32	m_xs
	Start point x-coordinate.
TInt32	m_ys
	Start point y-coordinate.
TInt32	m_xe
	End point x-coordinate.
TInt32	m_ye
	End point y-coordinate.

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Detailed Description

A line from a start to an end point.

Used for drawing lines in images.

Author(s):

Maarten Gribnau

Date:

March 6, 2001

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Constructor & Destructor Documentation

IMG_Line::IMG_Line ( TInt32 xs = 0, TInt32 ys = 0, TInt32 xe = 0, TInt32 ye = 0 ) [inline]

Constructs a line with the given values. Parameters: xs   start point x-coordinate ys   start point y-coordinate xe   end point x-coordinate ye   end point y-coordinate

IMG_Line::IMG_Line ( const IMG_Line & l ) [inline]

Copy constructor. Parameters: l   line to copy

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Member Function Documentation

float IMG_Line::getLength ( ) const [inline, virtual]

Access to line length. Returns: length of the line.

void IMG_Line::getPoint ( float t, TInt32 & x, TInt32 & y ) const [inline, virtual]

Returns point at given value for line parameter. Calculates the coordinates of a point on the line. Parameters: t   line parameter value (0<=t<=1) of the point requested. x   x-coordinate of the point. y   y-coordinate of the point.

bool IMG_Line::isEmpty ( ) const [inline, virtual]

Returns whether this line is empty. Empty line are lines that have length==0. Returns: boolean value (true==empty line)

void IMG_Line::set ( TInt32 xs, TInt32 ys, TInt32 xe, TInt32 ye ) [inline, virtual]

Sets all members of the line. Parameters: xs   start point x-coordinate ys   start point y-coordinate xe   end point x-coordinate ye   end point y-coordinate

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

• IMG_Line.h

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