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TTransfer Class Reference

This class represents the transfer function. More...

#include <transfer.h>

List of all members.

Public Methods
	TTransfer (THistogram *h)
	Constructor.
	~TTransfer ()
	Destructor.
int	split (TPaintBox *pb, int x, int y)
	Split the line at position (x,y).
void	clear ()
	Delete all lines.
bool	select (TPaintBox *pb, int x, int y)
	Select the line at position (x,y).
void	select (int idx)
	Select the line with index idx.
void	selectStart (int idx)
	Select the start point of the selected line.
void	selectEnd (int idx)
	Select the end point of the selected line.
TLine *	getSelected ()
	Returns the selected line.
int	getSelIdx ()
	Returns the index of the selected line.
TLine *	getLine (int idx)
	Get line with index idx.
void	unselect ()
	Unselect all lines.
void	drawTo (TPaintBox *pb)
	Draw the transfer function to the TPaintBox pb.
int __fastcall	lineNear (TPaintBox *pb, int x, int y)
	Return the index if the line to which the point (x,y) is near or -1 otherwise.
bool __fastcall	nearStart (int idx, TPaintBox *pb, int x, int y)
	Returns true if the point (x,y) is near the start point of the selected line.
bool __fastcall	nearEnd (int idx, TPaintBox *pb, int x, int y)
	Returns true if the point (x,y) is near the start point of the selected line.
int __fastcall	getName (double data)
	Get the name to the value spezified by data.
rgba __fastcall	getColor (__int16 data)
	Get the color value for the data value data.
TData __fastcall	getData (double data)
	Get data on base of a float value.
bool	loadFromXLM (_di_IXMLNode doc)
	Set up transfer function from XML document.
bool	saveToXML (_di_IXMLNode doc)
	Write to xml document.
int	addName (AnsiString &name)
	Add a new name to the names list.
Public Attributes
__property int	numLines = { read=_fill }
	Number of lines currently in the lines array.
__property bool	Dirty = { write=_dirty }
	Dirty flag for the RGBA cache.
__property TStringList *	areaNames = { read=_areaNames }
	Area names list.
Private Methods
void	_addLine (TLine *l)
	Add a new line at the end of the lines array.
void	_insertLine (TLine *l, int pos)
	Insert a line to the lines array at position pos.
void	_cleanTDataCache ()
	Clear the RBGA cache :).
bool	_setupTDataCache (__int16 data)
	Set up cache for position data.
Private Attributes
int	_size
	The lines array size.
int	_hsize
	The histogram size.
int	_fill
	The fill of the lines array.
TLine **	_lines
	The lines array.
THistogram *	_histo
	A reference to THistogram used to get several information from it during drawing it to the TPaintBox.
TData **	_TDataCache
	A Cache to speed up the calculation of the color and alpha data for the voxel data.
TStringList *	_areaNames
	Area name list.

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Detailed Description

This class represents the transfer function.

It is on the one side responsible for drawing the transfer function to a TPaintBox and on the other side for applying color and alpha data for the whole spectrum of the histogram.

Todo:

Refine nearLine to find all lines.

Definition at line 326 of file transfer.h.

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Member Function Documentation

bool TTransfer::select (  TPaintBox *    pb, int    x, int    y )

Select the line at position (x,y). The function finds the line by itself. Definition at line 333 of file transfer.cpp. References _lines, lineNear(), TLine::Selected, and unselect(). Referenced by split().

int TTransfer::split (  TPaintBox *    pb, int    x, int    y )

Split the line at position (x,y). The function finds the right line by itself. Definition at line 307 of file transfer.cpp. References _histo, _insertLine(), _lines, TLine::End, THistogram::getHPP(), lineNear(), nearEnd(), nearStart(), select(), and TLinePoint::X.

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

• transfer.h
• transfer.cpp

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