anatomist::ColorTraits< T > Class Template Reference

Converter value -> RGBA (high-level) More...

#include <anatomist/color/colortraits.h>

Public Member Functions
	ColorTraits (const AObjectPalette *palette, const T &mini, const T &maxi, const T &mini2, const T &maxi2, double min1, double max1, double zero1, double min2, double max2, double zero2)
	Constructor for 2D palettes.
	ColorTraits (const AObjectPalette *palette, const T &mini, const T &maxi, double min1, double max1, double zero1)
	Constructor for 1D palettes.
AimsRGBA	color (const T &) const
T	neutralColor () const
	returns a black / transparent / zero color
void	paletteCoords (double val0, double val1, int &px, int &py) const
void	paletteCoord (int dim, double val0, int &px) const
void	paletteCoord0 (double val0, int &px) const
void	paletteCoord1 (double val0, int &px) const

Detailed Description

template<typename T>
class anatomist::ColorTraits< T >

Converter value -> RGBA (high-level)

Colormap helper.

Allows to get rescalings to colormap space. Basically the color() method associates a RGBA color to a scalar value. To do so, values rescalings apply, and lookup in a colormap (AObjectPalette) returns the actual color.

Implementations for RGB/RGBA transforms also exist.

mini / maxi are min and max indexes used to address the colormap (let's call it "output colormap").

min1 / max1 are the range (as in AObjectPalette::min1()/max1() actually mapped to the colormap. Generally we use palette.min1()/max1()

Definition at line 129 of file colortraits.h.

Constructor & Destructor Documentation

ColorTraits() [1/2]

template<typename T>

anatomist::ColorTraits< T >::ColorTraits ( const AObjectPalette * palette, const T & mini, const T & maxi, const T & mini2, const T & maxi2, double min1, double max1, double zero1, double min2, double max2, double zero2 )

inline

Constructor for 2D palettes.

Definition at line 209 of file colortraits.h.

ColorTraits() [2/2]

template<typename T>

anatomist::ColorTraits< T >::ColorTraits ( const AObjectPalette * palette, const T & mini, const T & maxi, double min1, double max1, double zero1 )

inline

Constructor for 1D palettes.

Scaling parameters are processed, and should be passed carefully:

• palette is the object palette.

• mini / maxi are min and max values used to address the colormap from a source space. They can be either double float texture values, or indices used to build in a colormap or texture image. The methods color() and paletteCoords() get their parameters in this space.

  For zero-centered palettes, a technical issue currently makes it mandatory to use positive and negative velues here.

• min1 / max1 are the range to be mapped within the [mini, maxi] input space. They are coordinates in relative palette space (as in AObjectPalette::min1()/max1(). Depending on the values used here, different mappings may be obtained.
  • a Volume will use the volume min/max values, transformed in relative palette space (palette->relValue(object, absvolmin), palette->relValue(object, absvolmax)) to transform direct scalar volume values to RGB through the palette scale.
  • a texture will build a texture image (thus, a custom palette) covering just the zoomed palette region, using texture coord scaling and clamping for values outside these bounds, thus will map (palette->min(), palette->max()) or more precisely these bounds clamped within the range [0, 1] for "normal" palettes. Zero-centered palettes will use values matching the symmetric palette.
  • a colormap view will display the resampled palette beween given bounds (typically bound to the min/max texture values).
• zero is the value in the palette relative space (same as min, max) corresponding to the absolute 0 of the texture. This is used only in zero-centered palette mode in order to have the center.

Definition at line 221 of file colortraits.h.

Member Function Documentation

color()

template<typename T>

AimsRGBA anatomist::ColorTraits< T >::color ( const T & in ) const

inline

Definition at line 229 of file colortraits.h.

neutralColor()

template<typename T>

T anatomist::ColorTraits< T >::neutralColor ( ) const

inline

returns a black / transparent / zero color

Definition at line 235 of file colortraits.h.

paletteCoord()

template<typename T>

void anatomist::ColorTraits< T >::paletteCoord ( int dim, double val0, int & px ) const

inline

Definition at line 249 of file colortraits.h.

paletteCoord0()

template<typename T>

void anatomist::ColorTraits< T >::paletteCoord0 ( double val0, int & px ) const

inline

Definition at line 256 of file colortraits.h.

paletteCoord1()

template<typename T>

void anatomist::ColorTraits< T >::paletteCoord1 ( double val0, int & px ) const

inline

Definition at line 263 of file colortraits.h.

paletteCoords()

template<typename T>

void anatomist::ColorTraits< T >::paletteCoords ( double val0, double val1, int & px, int & py ) const

inline

Definition at line 241 of file colortraits.h.

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

• anatomist/color/colortraits.h