Gr::LineDrawImp< T > Class Template Reference

A low-level line-drawing class used in the implementation of Gr::LineDraw. More...

#include <grlinedraw.h>

Public Member Functions
	LineDrawImp (T x1, T y1, T x2, T y2)
	Constructor.
T	n () const
	Returns the iteration count.
bool	nextPoint ()
	Steps to the next point for point-wise iteration. More...
T	x () const
	Returns the current x coordinate for point-wise iteration.
T	y () const
	Returns the current y coordinate for point-wise iteration.
bool	flat () const
	Returns true if the x dimension of the line is greater the the y dimension. More...

Detailed Description

template<typename T>
class Gr::LineDrawImp< T >

A low-level line-drawing class used in the implementation of Gr::LineDraw.

The client code iterates over the points in the longest of the two dimensions, without having to know which dimension is the longest or which direction they are going.

Usage:

Gr::LineDrawImp<int> line( x1 , y1 , x2 , y2 ) ;
plot( line.x() , line.y() ) ;
for( int i = 0 ; i < line.n() ; i++ )
{
  line.nextPoint() ;
  plot( line.x() , line.y() ) ;
}

Definition at line 29 of file grlinedraw.h.

Member Function Documentation

template<typename T >

bool Gr::LineDrawImp< T >::flat

(

)

const

Returns true if the x dimension of the line is greater the the y dimension.

Definition at line 192 of file grlinedraw.h.

template<typename T >

bool Gr::LineDrawImp< T >::nextPoint

(

)

Steps to the next point for point-wise iteration.

Returns false if (x(),y()) is now off the end.

Definition at line 176 of file grlinedraw.h.

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

• /home/graeme/videotools/src/grlib/grlinedraw.h