---

AAFractalImage Class Reference

AAFractalImage takes a FractalImage that has already been calculated, and adaptively anti-aliases the image. More...

#include <AAFractalImage.h>

List of all members.

Public Methods
	AAFractalImage (FractalImage *)
	Constructor.
void	set_subpixel_gridsize (int)
	Sets the sub pixel grid size.
int	inq_subpixel_gridsize (void) const
void	restart (void)
	Initialises all the member variables for anti-aliasing 'm_image'.
bool	process (void)
	Processes the next pixel.
bool	inq_done (void) const
int	inq_progress (void) const
Private Attributes
FractalImage *	m_image
	FractalImage.
int	m_subpixel_gridsize
	Size of subpixel square grid.
bool	m_done
	Flag that is set once processing is finished.
int	m_progress
	Progress counter - increments from 0 to 100 during processing.
int	m_x
	'x' offset to current pixel.
int	m_y
	'y' offset to current pixel.
rgbcolour_t *	m_curr_rgb_pixel
	Pointer to current RGB pixel.
Vector2	m_curr_pixel
	Position of bottom left corner of current pixel.
Vector2	m_rowstart
	Position in fractal space of first pixel on the current row.
Vector2	m_xoffs
	Offset in fractal space from a pixel to the next.
Vector2	m_yoffs
	Offset in fractal space from a pixel in one row to the next.
Vector2	m_xsuboffs
	Distance from current sub-pixel row to next.
Vector2	m_ysuboffs
	Distance from current sub-pixel to next sub-pixel on current sub-pixel row.

---

Detailed Description

AAFractalImage takes a FractalImage that has already been calculated, and adaptively anti-aliases the image.

This is done by comparing each pixel with it's 8 neighbours. If it is different to any of its neighbours, it is anti-aliased. Otherwise, it is assumed to be in a constant region, so it does not need anti-aliasing.

---

Constructor & Destructor Documentation

AAFractalImage::AAFractalImage (  FractalImage *    image )

Constructor. Parameters: image  The image that this AAFractalImage will anti-alias.

---

Member Function Documentation

bool AAFractalImage::inq_done (  void    )  const [inline]

int AAFractalImage::inq_progress (  void    )  const [inline]

int AAFractalImage::inq_subpixel_gridsize (  void    )  const [inline]

bool AAFractalImage::process (  void    )

Processes the next pixel. This method should be called repeatedly until inq_done() returns true. Returns: Returns true if the display should be updated, otherwise false.

void AAFractalImage::restart (  void    )

Initialises all the member variables for anti-aliasing 'm_image'. This must be called before process() is called, and whenever the image or sub pixel grid size changes.

void AAFractalImage::set_subpixel_gridsize (  int    subpixel_gridsize )

Sets the sub pixel grid size. Parameters: subpixel_gridsize  Sets the size of the sub-pixel grid used to anti-alias. The number set defines the size of the square grid, so there will be the square of this number of sub-pixels. If 'n'=1, then there is only one sample per pixel, i.e. no anti-aliasing. If 'n'=2, then 2x2 (i.e. 4) samples are calculated per pixel. If 'n'=3, then 3x3 (i.e. 9) samples, and so on.

---

Member Data Documentation

Vector2 AAFractalImage::m_curr_pixel [private]

Position of bottom left corner of current pixel.

rgbcolour_t* AAFractalImage::m_curr_rgb_pixel [private]

Pointer to current RGB pixel.

bool AAFractalImage::m_done [private]

Flag that is set once processing is finished.

FractalImage* AAFractalImage::m_image [private]

FractalImage.

int AAFractalImage::m_progress [private]

Progress counter - increments from 0 to 100 during processing.

Vector2 AAFractalImage::m_rowstart [private]

Position in fractal space of first pixel on the current row.

int AAFractalImage::m_subpixel_gridsize [private]

Size of subpixel square grid. There will be the square of this value subpixels per pixel.

int AAFractalImage::m_x [private]

'x' offset to current pixel.

Vector2 AAFractalImage::m_xoffs [private]

Offset in fractal space from a pixel to the next. This is determined from the view transform and the image size.

Vector2 AAFractalImage::m_xsuboffs [private]

Distance from current sub-pixel row to next.

int AAFractalImage::m_y [private]

'y' offset to current pixel.

Vector2 AAFractalImage::m_yoffs [private]

Offset in fractal space from a pixel in one row to the next. This is determined from the view transform and the image size.

Vector2 AAFractalImage::m_ysuboffs [private]

Distance from current sub-pixel to next sub-pixel on current sub-pixel row.

---

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

• AAFractalImage.h
• AAFractalImage.cpp

---