Defines a transfer function for mapping a property to an RGB color value. More...

#include <vtkColorTransferFunction.h>

Inheritance diagram for vtkColorTransferFunction:

Collaboration diagram for vtkColorTransferFunction:

Public Types
typedef vtkScalarsToColors	Superclass

Public Types inherited from vtkScalarsToColors
enum	VectorModes { MAGNITUDE = 0 , COMPONENT = 1 , RGBCOLORS = 2 }

typedef vtkObject	Superclass

Public Member Functions
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class.

vtkColorTransferFunction *	NewInstance () const

void	DeepCopy (vtkScalarsToColors *f) override
	Copy the contents from another object.

void	ShallowCopy (vtkColorTransferFunction *f)

void	PrintSelf (ostream &os, vtkIndent indent) override
	Print method for vtkColorTransferFunction.

int	GetSize ()
	How many nodes define this function?

void	RemoveAllPoints ()
	Remove all points.

double *	GetColor (double x)
	Returns an RGB color for the specified scalar value.

void	GetColor (double x, double rgb[3]) override
	Map one value through the lookup table and store the color as an RGB array of doubles between 0 and 1 in the rgb argument.

const unsigned char *	MapValue (double v) override
	Map one value through the lookup table.

int	AdjustRange (double range[2])
	Remove all points out of the new range, and make sure there is a point at each end of that range.

void	BuildFunctionFromTable (double x1, double x2, int size, double *table)
	Construct a color transfer function from a table.

double *	GetDataPointer ()
	Returns a pointer to an array of all node values in an interleaved array with the layout [X1, R1, G1, B1, X2, R2, G2, B2, ..., Xn, Rn, Gn, Bn] where n is the number of nodes defining the transfer function.

void	FillFromDataPointer (int n, double *ptr)
	Defines the nodes from an array ptr with the layout [X1, R1, G1, B1, X2, R2, G2, B2, ..., Xn, Rn, Gn, Bn] where n is the number of nodes.

void	MapScalarsThroughTable2 (void input, unsigned char output, int inputDataType, int numberOfValues, int inputIncrement, int outputIncrement) override
	Map a set of scalars through the lookup table.

vtkIdType	GetNumberOfAvailableColors () override
	Get the number of available colors for mapping to.

void	GetIndexedColor (vtkIdType idx, double rgba[4]) override
	Return a color given an integer index.

int	EstimateMinNumberOfSamples (double const &x1, double const &x2)
	Estimates the minimum size of a table such that it would correctly sample this function.


int	AddRGBPoint (double x, double r, double g, double b)
	Add/Remove a point to/from the function defined in RGB or HSV Return the index of the point (0 based), or -1 on error.

int	AddRGBPoint (double x, double r, double g, double b, double midpoint, double sharpness)
	Add/Remove a point to/from the function defined in RGB or HSV Return the index of the point (0 based), or -1 on error.

int	AddRGBPoints (vtkDoubleArray x, vtkDoubleArray rgbColors)
	Add/Remove a point to/from the function defined in RGB or HSV Return the index of the point (0 based), or -1 on error.

int	AddRGBPoints (vtkDoubleArray x, vtkDoubleArray rgbColors, double midpoint, double sharpness)
	Add/Remove a point to/from the function defined in RGB or HSV Return the index of the point (0 based), or -1 on error.

int	AddHSVPoint (double x, double h, double s, double v)
	Add/Remove a point to/from the function defined in RGB or HSV Return the index of the point (0 based), or -1 on error.

int	AddHSVPoint (double x, double h, double s, double v, double midpoint, double sharpness)
	Add/Remove a point to/from the function defined in RGB or HSV Return the index of the point (0 based), or -1 on error.

int	RemovePoint (double x)
	Add/Remove a point to/from the function defined in RGB or HSV Return the index of the point (0 based), or -1 on error.


void	AddRGBSegment (double x1, double r1, double g1, double b1, double x2, double r2, double g2, double b2)
	Add two points to the function and remove all the points between them.

void	AddHSVSegment (double x1, double h1, double s1, double v1, double x2, double h2, double s2, double v2)
	Add two points to the function and remove all the points between them.


double	GetRedValue (double x)
	Get the color components individually.

double	GetGreenValue (double x)
	Get the color components individually.

double	GetBlueValue (double x)
	Get the color components individually.


int	GetNodeValue (int index, double val[6])
	For the node specified by index, set/get the location (X), R, G, and B values, midpoint, and sharpness values at the node.

int	SetNodeValue (int index, double val[6])
	For the node specified by index, set/get the location (X), R, G, and B values, midpoint, and sharpness values at the node.


double *	GetRange () override
	Returns min and max position of all function points.

virtual void	GetRange (double &arg1, double &arg2)
	Returns min and max position of all function points.

virtual void	GetRange (double _arg[2])
	Returns min and max position of all function points.


void	GetTable (double x1, double x2, int n, double *table)
	Fills in a table of n colors mapped from values mapped with even spacing between x1 and x2, inclusive.

void	GetTable (double x1, double x2, int n, float *table)
	Fills in a table of n colors mapped from values mapped with even spacing between x1 and x2, inclusive.

const unsigned char *	GetTable (double x1, double x2, int n)
	Fills in a table of n colors mapped from values mapped with even spacing between x1 and x2, inclusive.


virtual void	SetClamping (vtkTypeBool)
	Sets/gets whether clamping is used.

virtual vtkTypeBool	GetClamping ()
	Sets/gets whether clamping is used.

virtual void	ClampingOn ()
	Sets/gets whether clamping is used.

virtual void	ClampingOff ()
	Sets/gets whether clamping is used.


virtual void	SetColorSpace (int)
	Set/Get the color space used for interpolation: RGB, HSV, CIELAB, PROLAB, Diverging or Step.

void	SetColorSpaceToRGB ()
	Set/Get the color space used for interpolation: RGB, HSV, CIELAB, PROLAB, Diverging or Step.

void	SetColorSpaceToHSV ()
	Set/Get the color space used for interpolation: RGB, HSV, CIELAB, PROLAB, Diverging or Step.

void	SetColorSpaceToLab ()
	Set/Get the color space used for interpolation: RGB, HSV, CIELAB, PROLAB, Diverging or Step.

void	SetColorSpaceToLabCIEDE2000 ()
	Set/Get the color space used for interpolation: RGB, HSV, CIELAB, PROLAB, Diverging or Step.

void	SetColorSpaceToDiverging ()
	Set/Get the color space used for interpolation: RGB, HSV, CIELAB, PROLAB, Diverging or Step.

void	SetColorSpaceToStep ()
	Set/Get the color space used for interpolation: RGB, HSV, CIELAB, PROLAB, Diverging or Step.

void	SetColorSpaceToProlab ()
	Set/Get the color space used for interpolation: RGB, HSV, CIELAB, PROLAB, Diverging or Step.

virtual int	GetColorSpace ()
	Set/Get the color space used for interpolation: RGB, HSV, CIELAB, PROLAB, Diverging or Step.

virtual void	SetHSVWrap (vtkTypeBool)
	Set/Get the color space used for interpolation: RGB, HSV, CIELAB, PROLAB, Diverging or Step.

virtual vtkTypeBool	GetHSVWrap ()
	Set/Get the color space used for interpolation: RGB, HSV, CIELAB, PROLAB, Diverging or Step.

virtual void	HSVWrapOn ()
	Set/Get the color space used for interpolation: RGB, HSV, CIELAB, PROLAB, Diverging or Step.

virtual void	HSVWrapOff ()
	Set/Get the color space used for interpolation: RGB, HSV, CIELAB, PROLAB, Diverging or Step.


virtual void	SetScale (int)
	Set the type of scale to use, linear or logarithmic.

void	SetScaleToLinear ()
	Set the type of scale to use, linear or logarithmic.

void	SetScaleToLog10 ()
	Set the type of scale to use, linear or logarithmic.

virtual int	GetScale ()
	Set the type of scale to use, linear or logarithmic.


virtual void	SetNanColor (double, double, double)
	Set the RGB color to use when a NaN (not a number) is encountered.

virtual void	SetNanColor (double[3])
	Set the RGB color to use when a NaN (not a number) is encountered.

virtual double *	GetNanColor ()
	Set the RGB color to use when a NaN (not a number) is encountered.

virtual void	GetNanColor (double &, double &, double &)
	Set the RGB color to use when a NaN (not a number) is encountered.

virtual void	GetNanColor (double[3])
	Set the RGB color to use when a NaN (not a number) is encountered.


virtual void	SetNanOpacity (double)
	Get/Set the opacity to use when a NaN (not a number) is encountered.

virtual double	GetNanOpacity ()
	Get/Set the opacity to use when a NaN (not a number) is encountered.


virtual void	SetNanColorRGBA (double r, double g, double b, double a)
	Set the RGBA color to use when a NaN (not a number) is encountered.

void	SetNanColorRGBA (double rgba[4])
	Set the RGBA color to use when a NaN (not a number) is encountered.


virtual void	SetBelowRangeColor (double, double, double)
	Set the color to use when a value below the range is encountered.

virtual void	SetBelowRangeColor (double[3])
	Set the color to use when a value below the range is encountered.

virtual double *	GetBelowRangeColor ()
	Set the color to use when a value below the range is encountered.

virtual void	GetBelowRangeColor (double &, double &, double &)
	Set the color to use when a value below the range is encountered.

virtual void	GetBelowRangeColor (double[3])
	Set the color to use when a value below the range is encountered.


virtual void	SetUseBelowRangeColor (vtkTypeBool)
	Set whether the below range color should be used.

virtual vtkTypeBool	GetUseBelowRangeColor ()
	Set whether the below range color should be used.

virtual void	UseBelowRangeColorOn ()
	Set whether the below range color should be used.

virtual void	UseBelowRangeColorOff ()
	Set whether the below range color should be used.


virtual void	SetAboveRangeColor (double, double, double)
	Set the color to use when a value above the range is encountered.

virtual void	SetAboveRangeColor (double[3])
	Set the color to use when a value above the range is encountered.

virtual double *	GetAboveRangeColor ()
	Set the color to use when a value above the range is encountered.

virtual void	GetAboveRangeColor (double &, double &, double &)
	Set the color to use when a value above the range is encountered.

virtual void	GetAboveRangeColor (double[3])
	Set the color to use when a value above the range is encountered.


virtual void	SetUseAboveRangeColor (vtkTypeBool)
	Set whether the below range color should be used.

virtual vtkTypeBool	GetUseAboveRangeColor ()
	Set whether the below range color should be used.

virtual void	UseAboveRangeColorOn ()
	Set whether the below range color should be used.

virtual void	UseAboveRangeColorOff ()
	Set whether the below range color should be used.


virtual void	SetAllowDuplicateScalars (vtkTypeBool)
	Toggle whether to allow duplicate scalar values in the color transfer function (off by default).

virtual vtkTypeBool	GetAllowDuplicateScalars ()
	Toggle whether to allow duplicate scalar values in the color transfer function (off by default).

virtual void	AllowDuplicateScalarsOn ()
	Toggle whether to allow duplicate scalar values in the color transfer function (off by default).

virtual void	AllowDuplicateScalarsOff ()
	Toggle whether to allow duplicate scalar values in the color transfer function (off by default).

Public Member Functions inherited from vtkScalarsToColors
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class.

vtkScalarsToColors *	NewInstance () const

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.

virtual void	Build ()
	Perform any processing required (if any) before processing scalars.

virtual const unsigned char *	MapValue (double v)
	Map one value through the lookup table and return a color defined as an RGBA unsigned char tuple (4 bytes).

virtual void	GetColor (double v, double rgb[3])
	Map one value through the lookup table and store the color as an RGB array of doubles between 0 and 1 in the rgb argument.

double *	GetColor (double v)
	Map one value through the lookup table and return the color as an RGB array of doubles between 0 and 1.

virtual double	GetOpacity (double v)
	Map one value through the lookup table and return the alpha value (the opacity) as a double between 0 and 1.

double	GetLuminance (double x)
	Map one value through the lookup table and return the luminance 0.3red + 0.59green + 0.11*blue as a double between 0 and 1.

void	MapVectorsThroughTable (void input, unsigned char output, int inputDataType, int numberOfValues, int inputIncrement, int outputFormat, int vectorComponent, int vectorSize)
	Map vectors through the lookup table.

void	MapVectorsThroughTable (void input, unsigned char output, int inputDataType, int numberOfValues, int inputIncrement, int outputFormat)

void	MapScalarsThroughTable (vtkDataArray scalars, unsigned char output, int outputFormat)
	Map a set of scalars through the lookup table in a single operation.

void	MapScalarsThroughTable (vtkDataArray scalars, unsigned char output)

void	MapScalarsThroughTable (void input, unsigned char output, int inputDataType, int numberOfValues, int inputIncrement, int outputFormat)

virtual void	MapScalarsThroughTable2 (void input, unsigned char output, int inputDataType, int numberOfValues, int inputIncrement, int outputFormat)
	An internal method typically not used in applications.

virtual void	DeepCopy (vtkScalarsToColors *o)
	Copy the contents from another object.

virtual vtkTypeBool	UsingLogScale ()
	This should return 1 if the subclass is using log scale for mapping scalars to colors.

virtual vtkIdType	GetNumberOfAvailableColors ()
	Get the number of available colors for mapping to.

virtual vtkIdType	SetAnnotation (vtkVariant value, vtkStdString annotation)
	Add a new entry (or change an existing entry) to the list of annotated values.

virtual vtkIdType	SetAnnotation (vtkStdString value, vtkStdString annotation)
	This variant of SetAnnotation accepts the value as a string so ParaView can treat annotations as string vector arrays.

vtkIdType	GetNumberOfAnnotatedValues ()
	Return the annotated value at a particular index in the list of annotations.

vtkVariant	GetAnnotatedValue (vtkIdType idx)
	Return the annotated value at a particular index in the list of annotations.

vtkStdString	GetAnnotation (vtkIdType idx)
	Return the annotation at a particular index in the list of annotations.

virtual void	GetAnnotationColor (const vtkVariant &val, double rgba[4])
	Obtain the color associated with a particular annotated value (or NanColor if unmatched).

vtkIdType	GetAnnotatedValueIndex (vtkVariant val)
	Return the index of the given value in the list of annotated values (or -1 if not present).

vtkIdType	GetAnnotatedValueIndexInternal (const vtkVariant &val)
	Look up an index into the array of annotations given a value.

virtual void	GetIndexedColor (vtkIdType i, double rgba[4])
	Get the "indexed color" assigned to an index.

virtual bool	RemoveAnnotation (vtkVariant value)
	Remove an existing entry from the list of annotated values.

virtual void	ResetAnnotations ()
	Remove all existing values and their annotations.

virtual vtkTypeBool	IsOpaque ()
	Return true if all of the values defining the mapping have an opacity equal to 1.

virtual vtkTypeBool	IsOpaque (vtkAbstractArray *scalars, int colorMode, int component)
	Return true if all of the values defining the mapping have an opacity equal to 1.

virtual vtkTypeBool	IsOpaque (vtkAbstractArray scalars, int colorMode, int component, vtkUnsignedCharArray ghosts, unsigned char ghostsToSkip=0xff)
	Return true if all of the values defining the mapping have an opacity equal to 1.

virtual void	SetAlpha (double alpha)
	Specify an additional opacity (alpha) value to blend with.

virtual double	GetAlpha ()
	Specify an additional opacity (alpha) value to blend with.

virtual vtkUnsignedCharArray *	MapScalars (vtkDataArray *scalars, int colorMode, int component, int outputFormat=VTK_RGBA)
	Internal methods that map a data array into an unsigned char array.

virtual vtkUnsignedCharArray *	MapScalars (vtkAbstractArray *scalars, int colorMode, int component, int outputFormat=VTK_RGBA)
	Internal methods that map a data array into an unsigned char array.

virtual void	SetVectorMode (int)
	Change mode that maps vectors by magnitude vs.

virtual int	GetVectorMode ()
	Change mode that maps vectors by magnitude vs.

void	SetVectorModeToMagnitude ()
	Change mode that maps vectors by magnitude vs.

void	SetVectorModeToComponent ()
	Change mode that maps vectors by magnitude vs.

void	SetVectorModeToRGBColors ()
	Change mode that maps vectors by magnitude vs.

virtual void	SetVectorComponent (int)
	If the mapper does not select which component of a vector to map to colors, you can specify it here.

virtual int	GetVectorComponent ()
	If the mapper does not select which component of a vector to map to colors, you can specify it here.

virtual void	SetVectorSize (int)
	When mapping vectors, consider only the number of components selected by VectorSize to be part of the vector, and ignore any other components.

virtual int	GetVectorSize ()
	When mapping vectors, consider only the number of components selected by VectorSize to be part of the vector, and ignore any other components.

virtual void	SetAnnotations (vtkAbstractArray values, vtkStringArray annotations)
	Set a list of discrete values, either as a categorical set of values (when IndexedLookup is true) or as a set of annotations to add to a scalar array (when IndexedLookup is false).

virtual vtkAbstractArray *	GetAnnotatedValues ()
	Set a list of discrete values, either as a categorical set of values (when IndexedLookup is true) or as a set of annotations to add to a scalar array (when IndexedLookup is false).

virtual vtkStringArray *	GetAnnotations ()
	Set a list of discrete values, either as a categorical set of values (when IndexedLookup is true) or as a set of annotations to add to a scalar array (when IndexedLookup is false).

virtual void	SetIndexedLookup (vtkTypeBool)
	Set/get whether the lookup table is for categorical or ordinal data.

virtual vtkTypeBool	GetIndexedLookup ()
	Set/get whether the lookup table is for categorical or ordinal data.

virtual void	IndexedLookupOn ()
	Set/get whether the lookup table is for categorical or ordinal data.

virtual void	IndexedLookupOff ()
	Set/get whether the lookup table is for categorical or ordinal data.

template<>
unsigned char	ColorToUChar (double t)
	Specializations of vtkScalarsToColors::ColorToUChar Converts from a color in a floating point type in range 0.0-1.0 to a uchar in range 0-255.

template<>
unsigned char	ColorToUChar (float t)
	Specializations of vtkScalarsToColors::ColorToUChar Converts from a color in a floating point type in range 0.0-1.0 to a uchar in range 0-255.

Public Member Functions inherited from vtkObject
	vtkBaseTypeMacro (vtkObject, vtkObjectBase)

virtual void	DebugOn ()
	Turn debugging output on.

virtual void	DebugOff ()
	Turn debugging output off.

bool	GetDebug ()
	Get the value of the debug flag.

void	SetDebug (bool debugFlag)
	Set the value of the debug flag.

virtual void	Modified ()
	Update the modification time for this object.

virtual vtkMTimeType	GetMTime ()
	Return this object's modified time.

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.

void	RemoveObserver (unsigned long tag)

void	RemoveObservers (unsigned long event)

void	RemoveObservers (const char *event)

void	RemoveAllObservers ()

vtkTypeBool	HasObserver (unsigned long event)

vtkTypeBool	HasObserver (const char *event)

vtkTypeBool	InvokeEvent (unsigned long event)

vtkTypeBool	InvokeEvent (const char *event)

std::string	GetObjectDescription () const override
	The object description printed in messages and PrintSelf output.

unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

unsigned long	AddObserver (const char event, vtkCommand , float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkCommand *	GetCommand (unsigned long tag)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObserver (vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObservers (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObservers (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkTypeBool	HasObserver (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkTypeBool	HasObserver (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Allow user to set the AbortFlagOn() with the return value of the callback method.

vtkTypeBool	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not.

vtkTypeBool	InvokeEvent (const char event, void callData)
	This method invokes an event and return whether the event was aborted or not.

virtual void	SetObjectName (const std::string &objectName)
	Set/get the name of this object for reporting purposes.

virtual std::string	GetObjectName () const
	Set/get the name of this object for reporting purposes.

Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string.

virtual std::string	GetObjectDescription () const
	The object description printed in messages and PrintSelf output.

virtual vtkTypeBool	IsA (const char *name)
	Return 1 if this class is the same type of (or a subclass of) the named class.

virtual vtkIdType	GetNumberOfGenerationsFromBase (const char *name)
	Given the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).

virtual void	Delete ()
	Delete a VTK object.

virtual void	FastDelete ()
	Delete a reference to this object.

void	InitializeObjectBase ()

void	Print (ostream &os)
	Print an object to an ostream.

void	Register (vtkObjectBase *o)
	Increase the reference count (mark as used by another object).

virtual void	UnRegister (vtkObjectBase *o)
	Decrease the reference count (release by another object).

int	GetReferenceCount ()
	Return the current reference count of this object.

void	SetReferenceCount (int)
	Sets the reference count.

bool	GetIsInMemkind () const
	A local state flag that remembers whether this object lives in the normal or extended memory space.

virtual void	PrintHeader (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses.

virtual void	PrintTrailer (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses.

virtual bool	UsesGarbageCollector () const
	Indicate whether the class uses `vtkGarbageCollector` or not.

Static Public Member Functions
static vtkColorTransferFunction *	New ()

static vtkTypeBool	IsTypeOf (const char *type)

static vtkColorTransferFunction *	SafeDownCast (vtkObjectBase *o)

Static Public Member Functions inherited from vtkScalarsToColors
static vtkTypeBool	IsTypeOf (const char *type)

static vtkScalarsToColors *	SafeDownCast (vtkObjectBase *o)

static vtkScalarsToColors *	New ()

template<typename T >
static unsigned char	ColorToUChar (T t)
	Converts a color from numeric type T to uchar.

template<typename T >
static void	ColorToUChar (T t, unsigned char *dest)
	Converts a color from numeric type T to uchar.

Static Public Member Functions inherited from vtkObject
static vtkObject *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

static void	BreakOnError ()
	This method is called when vtkErrorMacro executes.

static void	SetGlobalWarningDisplay (vtkTypeBool val)
	This is a global flag that controls whether any debug, warning or error messages are displayed.

static void	GlobalWarningDisplayOn ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.

static void	GlobalWarningDisplayOff ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.

static vtkTypeBool	GetGlobalWarningDisplay ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.

Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool	IsTypeOf (const char *name)
	Return 1 if this class type is the same type of (or a subclass of) the named class.

static vtkIdType	GetNumberOfGenerationsFromBaseType (const char *name)
	Given a the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).

static vtkObjectBase *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

static void	SetMemkindDirectory (const char *directoryname)
	The name of a directory, ideally mounted -o dax, to memory map an extended memory space within.

static bool	GetUsingMemkind ()
	A global state flag that controls whether vtkObjects are constructed in the usual way (the default) or within the extended memory space.

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkColorTransferFunction ()

	~vtkColorTransferFunction () override

void	SortAndUpdateRange ()
	Internal method to sort the vector and update the Range whenever a node is added, edited or removed It always calls Modified().

bool	UpdateRange ()
	Returns true if the range has been changed.

void	MovePoint (double oldX, double newX)
	Moves point from oldX to newX.

double	FindMinimumXDistance ()
	Traverses the nodes to find the minimum distance.


void	SetRange (double, double) override
	Set the range of scalars being mapped.

void	SetRange (const double rng[2]) override
	Set the range of scalars being mapped.

Protected Member Functions inherited from vtkScalarsToColors
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkScalarsToColors ()

	~vtkScalarsToColors () override

void	MapColorsToColors (void input, unsigned char output, int inputDataType, int numberOfValues, int numberOfComponents, int vectorSize, int outputFormat)
	An internal method that assumes that the input already has the right colors, and only remaps the range to [0,255] and pads to the desired output format.

vtkUnsignedCharArray *	ConvertToRGBA (vtkDataArray *colors, int numComp, int numTuples)
	An internal method used to convert a color array to RGBA.

void	MapVectorsToMagnitude (void input, double output, int inputDataType, int numberOfValues, int numberOfComponents, int vectorSize)
	An internal method for converting vectors to magnitudes, used as a preliminary step before doing magnitude mapping.

virtual vtkIdType	CheckForAnnotatedValue (vtkVariant value)
	Allocate annotation arrays if needed, then return the index of the given value or -1 if not present.

virtual void	UpdateAnnotatedValueMap ()
	Update the map from annotated values to indices in the array of annotations.

Protected Member Functions inherited from vtkObject
	vtkObject ()

	~vtkObject () override

void	RegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	InternalGrabFocus (vtkCommand mouseEvents, vtkCommand keypressEvents=nullptr)
	These methods allow a command to exclusively grab all events.

void	InternalReleaseFocus ()
	These methods allow a command to exclusively grab all events.

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	RegisterInternal (vtkObjectBase *, vtkTypeBool check)

virtual void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check)

virtual void	ReportReferences (vtkGarbageCollector *)

virtual void	ObjectFinalize ()

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Protected Attributes
vtkColorTransferFunctionInternals *	Internal

vtkTypeBool	Clamping
	Determines the function value outside of defined points Zero = always return 0.0 outside of defined points One = clamp to the lowest value below defined points and highest value above defined points.

int	ColorSpace
	The color space in which interpolation is performed.

vtkTypeBool	HSVWrap
	Specify if HSV is wrap or not.

int	Scale
	The color interpolation scale (linear or logarithmic).

double	NanColor [3]
	The color to use for not-a-number.

double	NanOpacity
	The opacity to use for not-a-number.

double	BelowRangeColor [3]
	The below-range color.

vtkTypeBool	UseBelowRangeColor
	Flag indicating whether below-range color should be used.

double	AboveRangeColor [3]
	The above-range color.

vtkTypeBool	UseAboveRangeColor
	Flag indicating whether below-range color should be used.

double *	Function
	Temporary array to store data from the nodes.

double	Range [2]
	The min and max node locations.

unsigned char	UnsignedCharRGBAValue [4]
	Temporary storage for an evaluated color (0 to 255 RGBA A=255)

vtkTypeBool	AllowDuplicateScalars
	If on, the same scalar value may have more than one node assigned to it.

vtkTimeStamp	BuildTime

unsigned char *	Table

int	TableSize
	Temporary storage for the size of the table.

Protected Attributes inherited from vtkScalarsToColors
vtkAbstractArray *	AnnotatedValues

vtkStringArray *	Annotations

vtkInternalAnnotatedValueList *	AnnotatedValueList

vtkTypeBool	IndexedLookup

double	Alpha

int	VectorMode

int	VectorComponent

int	VectorSize

int	UseMagnitude

unsigned char	RGBABytes [4]

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

std::string	ObjectName

Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t >	ReferenceCount

vtkWeakPointerBase **	WeakPointers

Additional Inherited Members
Static Protected Member Functions inherited from vtkObjectBase
static vtkMallocingFunction	GetCurrentMallocFunction ()

static vtkReallocingFunction	GetCurrentReallocFunction ()

static vtkFreeingFunction	GetCurrentFreeFunction ()

static vtkFreeingFunction	GetAlternateFreeFunction ()

Detailed Description

Defines a transfer function for mapping a property to an RGB color value.

vtkColorTransferFunction is a color mapping in RGB or HSV space that uses piecewise hermite functions to allow interpolation that can be piecewise constant, piecewise linear, or somewhere in-between (a modified piecewise hermite function that squishes the function according to a sharpness parameter). The function also allows for the specification of the midpoint (the place where the function reaches the average of the two bounding nodes) as a normalize distance between nodes. See the description of class vtkPiecewiseFunction for an explanation of midpoint and sharpness.

Note that transparency (alpha) is only supported in NanColorRGBA feature.

See also: vtkPiecewiseFunction

Examples:: vtkColorTransferFunction (Examples)

Online Examples:

MedicalDemo4

Histogram2D

ShepardMethod

AssignCellColorsFromLUT

ElevationBandsWithGlyphs

PointDataSubdivision

FixedPointVolumeRayCastMapperCT

IntermixedUnstructuredGrid

MinIntensityRendering

RayCastIsosurface

Tests:: vtkColorTransferFunction (Tests)

Definition at line 163 of file vtkColorTransferFunction.h.

Member Typedef Documentation

◆ Superclass

typedef vtkScalarsToColors vtkColorTransferFunction::Superclass

Definition at line 167 of file vtkColorTransferFunction.h.

Constructor & Destructor Documentation

◆ vtkColorTransferFunction()

vtkColorTransferFunction::vtkColorTransferFunction ( )

protected

◆ ~vtkColorTransferFunction()

vtkColorTransferFunction::~vtkColorTransferFunction ( )

overrideprotected

Member Function Documentation

◆ New()

static vtkColorTransferFunction * vtkColorTransferFunction::New ( )

static

◆ IsTypeOf()

static vtkTypeBool vtkColorTransferFunction::IsTypeOf ( const char * type )

static

◆ IsA()

virtual vtkTypeBool vtkColorTransferFunction::IsA ( const char * name )

virtual

Return 1 if this class is the same type of (or a subclass of) the named class.

Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkScalarsToColors.

Reimplemented in vtkDiscretizableColorTransferFunction.

◆ SafeDownCast()

static vtkColorTransferFunction * vtkColorTransferFunction::SafeDownCast ( vtkObjectBase * o )

static

◆ NewInstanceInternal()

virtual vtkObjectBase * vtkColorTransferFunction::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkScalarsToColors.

Reimplemented in vtkDiscretizableColorTransferFunction.

◆ NewInstance()

vtkColorTransferFunction * vtkColorTransferFunction::NewInstance ( ) const

◆ DeepCopy()

void vtkColorTransferFunction::DeepCopy ( vtkScalarsToColors * o )

overridevirtual

Copy the contents from another object.

Reimplemented from vtkScalarsToColors.

◆ ShallowCopy()

void vtkColorTransferFunction::ShallowCopy ( vtkColorTransferFunction * f )

◆ PrintSelf()

void vtkColorTransferFunction::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)

overridevirtual

Print method for vtkColorTransferFunction.

Reimplemented from vtkObjectBase.

Reimplemented in vtkDiscretizableColorTransferFunction.

◆ GetSize()

int vtkColorTransferFunction::GetSize ( )

How many nodes define this function?

◆ AddRGBPoint() [1/2]

int vtkColorTransferFunction::AddRGBPoint	(	double	x,
		double	r,
		double	g,
		double	b
	)

Add/Remove a point to/from the function defined in RGB or HSV Return the index of the point (0 based), or -1 on error.

See the description of class vtkPiecewiseFunction for an explanation of midpoint and sharpness.

◆ AddRGBPoint() [2/2]

int vtkColorTransferFunction::AddRGBPoint	(	double	x,
		double	r,
		double	g,
		double	b,
		double	midpoint,
		double	sharpness
	)

Add/Remove a point to/from the function defined in RGB or HSV Return the index of the point (0 based), or -1 on error.

See the description of class vtkPiecewiseFunction for an explanation of midpoint and sharpness.

◆ AddRGBPoints() [1/2]

int vtkColorTransferFunction::AddRGBPoints	(	vtkDoubleArray *	x,
		vtkDoubleArray *	rgbColors
	)

Add/Remove a point to/from the function defined in RGB or HSV Return the index of the point (0 based), or -1 on error.

See the description of class vtkPiecewiseFunction for an explanation of midpoint and sharpness.

◆ AddRGBPoints() [2/2]

int vtkColorTransferFunction::AddRGBPoints	(	vtkDoubleArray *	x,
		vtkDoubleArray *	rgbColors,
		double	midpoint,
		double	sharpness
	)

Add/Remove a point to/from the function defined in RGB or HSV Return the index of the point (0 based), or -1 on error.

See the description of class vtkPiecewiseFunction for an explanation of midpoint and sharpness.

◆ AddHSVPoint() [1/2]

int vtkColorTransferFunction::AddHSVPoint	(	double	x,
		double	h,
		double	s,
		double	v
	)

Add/Remove a point to/from the function defined in RGB or HSV Return the index of the point (0 based), or -1 on error.

See the description of class vtkPiecewiseFunction for an explanation of midpoint and sharpness.

◆ AddHSVPoint() [2/2]

int vtkColorTransferFunction::AddHSVPoint	(	double	x,
		double	h,
		double	s,
		double	v,
		double	midpoint,
		double	sharpness
	)

Add/Remove a point to/from the function defined in RGB or HSV Return the index of the point (0 based), or -1 on error.

See the description of class vtkPiecewiseFunction for an explanation of midpoint and sharpness.

◆ RemovePoint()

int vtkColorTransferFunction::RemovePoint ( double x )

Add/Remove a point to/from the function defined in RGB or HSV Return the index of the point (0 based), or -1 on error.

See the description of class vtkPiecewiseFunction for an explanation of midpoint and sharpness.

◆ AddRGBSegment()

void vtkColorTransferFunction::AddRGBSegment	(	double	x1,
		double	r1,
		double	g1,
		double	b1,
		double	x2,
		double	r2,
		double	g2,
		double	b2
	)

Add two points to the function and remove all the points between them.

◆ AddHSVSegment()

void vtkColorTransferFunction::AddHSVSegment	(	double	x1,
		double	h1,
		double	s1,
		double	v1,
		double	x2,
		double	h2,
		double	s2,
		double	v2
	)

Add two points to the function and remove all the points between them.

◆ RemoveAllPoints()

void vtkColorTransferFunction::RemoveAllPoints ( )

Remove all points.

◆ GetColor() [1/2]

double * vtkColorTransferFunction::GetColor ( double x )

inline

Returns an RGB color for the specified scalar value.

Definition at line 216 of file vtkColorTransferFunction.h.

◆ GetColor() [2/2]

void vtkColorTransferFunction::GetColor	(	double	v,
		double	rgb[3]
	)

overridevirtual

Map one value through the lookup table and store the color as an RGB array of doubles between 0 and 1 in the rgb argument.

Reimplemented from vtkScalarsToColors.

Reimplemented in vtkDiscretizableColorTransferFunction.

◆ GetRedValue()

double vtkColorTransferFunction::GetRedValue ( double x )

Get the color components individually.

◆ GetGreenValue()

double vtkColorTransferFunction::GetGreenValue ( double x )

Get the color components individually.

◆ GetBlueValue()

double vtkColorTransferFunction::GetBlueValue ( double x )

Get the color components individually.

◆ GetNodeValue()

int vtkColorTransferFunction::GetNodeValue	(	int	index,
		double	val[6]
	)

For the node specified by index, set/get the location (X), R, G, and B values, midpoint, and sharpness values at the node.

◆ SetNodeValue()

int vtkColorTransferFunction::SetNodeValue	(	int	index,
		double	val[6]
	)

For the node specified by index, set/get the location (X), R, G, and B values, midpoint, and sharpness values at the node.

◆ MapValue()

const unsigned char * vtkColorTransferFunction::MapValue ( double v )

overridevirtual

Map one value through the lookup table.

Reimplemented from vtkScalarsToColors.

Reimplemented in vtkDiscretizableColorTransferFunction.

◆ GetRange() [1/3]

double * vtkColorTransferFunction::GetRange ( )

inlineoverridevirtual

Returns min and max position of all function points.

Reimplemented from vtkScalarsToColors.

Definition at line 247 of file vtkColorTransferFunction.h.

◆ GetRange() [2/3]

virtual void vtkColorTransferFunction::GetRange	(	double &	arg1,
		double &	arg2
	)

inlinevirtual

Returns min and max position of all function points.

Definition at line 248 of file vtkColorTransferFunction.h.

◆ GetRange() [3/3]

virtual void vtkColorTransferFunction::GetRange ( double _arg[2] )

inlinevirtual

Returns min and max position of all function points.

Definition at line 253 of file vtkColorTransferFunction.h.

◆ AdjustRange()

int vtkColorTransferFunction::AdjustRange ( double range[2] )

Remove all points out of the new range, and make sure there is a point at each end of that range.

Returns 1 on success, 0 otherwise.

◆ GetTable() [1/3]

void vtkColorTransferFunction::GetTable	(	double	x1,
		double	x2,
		int	n,
		double *	table
	)

Fills in a table of n colors mapped from values mapped with even spacing between x1 and x2, inclusive.

Note that GetTable ignores IndexedLookup

◆ GetTable() [2/3]

void vtkColorTransferFunction::GetTable	(	double	x1,
		double	x2,
		int	n,
		float *	table
	)

Fills in a table of n colors mapped from values mapped with even spacing between x1 and x2, inclusive.

Note that GetTable ignores IndexedLookup

◆ GetTable() [3/3]

const unsigned char * vtkColorTransferFunction::GetTable	(	double	x1,
		double	x2,
		int	n
	)

Fills in a table of n colors mapped from values mapped with even spacing between x1 and x2, inclusive.

Note that GetTable ignores IndexedLookup

◆ BuildFunctionFromTable()

void vtkColorTransferFunction::BuildFunctionFromTable	(	double	x1,
		double	x2,
		int	size,
		double *	table
	)

Construct a color transfer function from a table.

Unlike FillFromDataPointer(), the table parameter's layout is assumed to be [R1, G1, B1, R2, G2, B2, ..., Rn, Gn, Bn], and it is assumed to be a block of memory of size [3*size]. After calling this method, the function range will be [x1, x2], the function will have size nodes, and function values will be regularly spaced between x1 and x2.

◆ SetClamping()

virtual void vtkColorTransferFunction::SetClamping ( vtkTypeBool )

virtual

Sets/gets whether clamping is used.

If on, scalar values below the lower range value set for the transfer function will be mapped to the first node color, and scalar values above the upper range value set for the transfer function will be mapped to the last node color. If off, values outside the range are mapped to black.

◆ GetClamping()

virtual vtkTypeBool vtkColorTransferFunction::GetClamping ( )

virtual

Sets/gets whether clamping is used.

If on, scalar values below the lower range value set for the transfer function will be mapped to the first node color, and scalar values above the upper range value set for the transfer function will be mapped to the last node color. If off, values outside the range are mapped to black.

◆ ClampingOn()

virtual void vtkColorTransferFunction::ClampingOn ( )

virtual

Sets/gets whether clamping is used.

If on, scalar values below the lower range value set for the transfer function will be mapped to the first node color, and scalar values above the upper range value set for the transfer function will be mapped to the last node color. If off, values outside the range are mapped to black.

◆ ClampingOff()

virtual void vtkColorTransferFunction::ClampingOff ( )

virtual

Sets/gets whether clamping is used.

If on, scalar values below the lower range value set for the transfer function will be mapped to the first node color, and scalar values above the upper range value set for the transfer function will be mapped to the last node color. If off, values outside the range are mapped to black.