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tlp::ColorScale Class Reference

This class represents a color scale to perform color mapping. The color scale can be either gradient or predefined colors steps. If the color scale is a gradient, returned colors are interpolated in function of the position. If the color scale isn't a gradient returned colors are the predefined colors steps. More...

`#include <ColorScale.h>`

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List of all members.

## Public Member Functions

- ColorScale (const bool gradient=true)
- ColorScale (const std::vector< Color > &colors, const bool gradient=true)
- ColorScale (const ColorScale &scale)
- ColorScale & operator= (const ColorScale &scale)
- virtual ~ColorScale ()
- virtual void setColorScale (const std::vector< Color > colors, const bool gradient=true)
    Configures the color scale. This method configures the color scale. If the scale was previously configured the old configuration is lost.
- virtual void setColorAtPos (const float pos, const Color &color)
    Adds a color to the color scale at specific position. This method adds a color to the color scale at a specific position.
- virtual Color getColorAtPos (const float pos) const
    Returns the color for a given position in the color scale. This method computes the color associated to a specific position in the color scale and returns it.
- bool colorScaleInitialized () const
    Returns true is the color scale was initialized.
- std::map< float, Color > getColorMap () const
    Returns a map corresponding to the color scale. The index of the map is the position for the corresponding color in the color scale.
- void setColorMap (const std::map< float, Color > &colorMap)
    Set the map to configure position to color mapping. The values in the map must be between 0.0 and 1.0, other values will be ignored.
- bool isGradient () const
    Returns true if the color scale is a gradient.

## Protected Attributes

- std::map< float, Color > colorMap
- bool gradient
- bool colorScaleSet

## Detailed Description

This class represents a color scale to perform color mapping. The color scale can be either gradient or predefined colors steps. If the color scale is a gradient, returned colors are interpolated in function of the position. If the color scale isn't a gradient returned colors are the predefined colors steps.

     \// Creating the color scale.
     ColorScale colorScale;
     \// Color scale initialization : from blue to red with gradient.
     colorScale.setColorAtPos(0.0, Color(0,0,255));
     colorScale.setColorAtPos(1.0, Color(255,0,0));

     \// Get the color for the position 0.5, i.e. Color(127,0,127).
     colorScale.getColorAtPos(0.5);
     \// Reinitialize the color scale : from blue to red without gradient.
     vector<color> newColors;
     newColors.push_back(Color(0,0,255));
     newColors.push_back(Color(255,0,0));
     colorScale.setColorScale(newColors,false);
     \// Get the color for the position 0.3, i.e. Color(0,0,255).
     colorScale.getColorAtPos(0.3);
     \// Get the color for the position 0.7, i.e. Color(255,0,0).
     colorScale.getColorAtPos(0.7);

## Constructor & Destructor Documentation

tlp::ColorScale::ColorScale | ( | const bool | gradient = `true` | ) |

Initializes a color scale with a default set of colors.

Parameters:

  gradient | Specify if the color scale should be a gradient or not.

tlp::ColorScale::ColorScale | ( | const std::vector< Color > & | colors,
|  | const bool | gradient = `true`
| ) |  |

Initializes a color scale with a set of colors passed as parameter

Parameters:

  colors | a vector of colors defining the color scale (first color is at position 0, last color at position 1)
  gradient | Specify if the color scale should be a gradient or not.

tlp::ColorScale::ColorScale | ( | const ColorScale & | scale | ) |

virtual tlp::ColorScale::~ColorScale | ( |  | ) | `[virtual]`

## Member Function Documentation

bool tlp::ColorScale::colorScaleInitialized | ( |  | ) | const`[inline]`

Returns true is the color scale was initialized.

virtual Color tlp::ColorScale::getColorAtPos | ( | const float | pos | ) | const`[virtual]`

Returns the color for a given position in the color scale. This method computes the color associated to a specific position in the color scale and returns it.

Parameters:

  pos | This value defines the position of the color in the scale and must be between 0.0 and 1.0 (it will be clamped otherwise).

Returns:
  The color corresponding to the position in the scale.

std::map<float, Color> tlp::ColorScale::getColorMap | ( |  | ) | const`[inline]`

Returns a map corresponding to the color scale. The index of the map is the position for the corresponding color in the color scale.

bool tlp::ColorScale::isGradient | ( |  | ) | const`[inline]`

Returns true if the color scale is a gradient.

ColorScale& tlp::ColorScale::operator= | ( | const ColorScale & | scale | ) |

virtual void tlp::ColorScale::setColorAtPos | ( | const float | pos,
|  | const Color & | color
| ) |  | `[virtual]`

Adds a color to the color scale at specific position. This method adds a color to the color scale at a specific position.

Parameters:

  pos | the position in the color scale (0.0 <= pos <= 1.0)
  color | the color to add at the specified position

void tlp::ColorScale::setColorMap | ( | const std::map< float, Color > & | colorMap | ) |

Set the map to configure position to color mapping. The values in the map must be between 0.0 and 1.0, other values will be ignored.

virtual void tlp::ColorScale::setColorScale | ( | const std::vector< Color > | colors,
|  | const bool | gradient = `true`
| ) |  | `[virtual]`

Configures the color scale. This method configures the color scale. If the scale was previously configured the old configuration is lost.

Parameters:

  colors | The colors to use in the color scale.
  gradient | If set to true, color scale is a gradient

## Member Data Documentation

std::map<float, Color> tlp::ColorScale::colorMap `[protected]`

bool tlp::ColorScale::colorScaleSet `[protected]`

bool tlp::ColorScale::gradient `[protected]`

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