CVD::Brezenham8 Class Reference
[Computer graphics]

#include <brezenham.h>

Public Member Functions
	Brezenham8 (TooN::Vector< 2 > dir)
ImageRef	sideways ()
ImageRef	step ()
	Returns the next image co-ordinate along the line.
Private Attributes
ImageRef	my_sideways
double	residual
ImageRef	step1
ImageRef	step2
double	val1
double	val2

Detailed Description

Class to implement the Bresenham line-drawing algorithm. This object does not draw directly into an image, it simply outputs the set of image co-ordinates that should be visited to draw a line in a certain direction. Pixels are generated in a 8-connected sense (i.e. diagonal steps are possible). See also Brezenham.

Definition at line 61 of file brezenham.h.

Constructor & Destructor Documentation

CVD::Brezenham8::Brezenham8 ( TooN::Vector< 2 > dir )

Construct a line-drawing object

Parameters:

dir

The (x,y) direction of the line

Member Function Documentation

ImageRef CVD::Brezenham8::sideways ( ) [inline]

Which compass position most orthogonal to the line's direction? At each pixel given by step() you are guaranteed to be able to walk in the direction given by sideways and not walk on the line.

Definition at line 74 of file brezenham.h.

ImageRef CVD::Brezenham8::step ( )

Returns the next image co-ordinate along the line.