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/* Color3f.hpp
Copyright (c) 2010 - 2011 by Felix Lauer and Simon Schneegans
This program is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <http://www.gnu.org/licenses/>. */
# ifndef COLOR4F_HPP_INCLUDED
# define COLOR4F_HPP_INCLUDED
# include <cmath>
# include <algorithm>
# include <SFML/Graphics.hpp>
/// A struct for color handling.
/// It stores the color in RGB values, but provides an HSV
/// interface as well.
struct Color3f {
public:
/// Default ctor, white.
Color3f ();
/// Copy ctor.
Color3f (Color3f const& color);
/// Ctor from RGB values.
Color3f (float red, float green, float blue);
/// \name Getters
///@{
/// Returns the red part of the color.
float r() const;
/// Returns the green part of the color.
float g() const;
/// Returns the blue part of the color.
float b() const;
/// Returns the hue of the color.
float h() const;
/// Returns the saturation of the color.
float s() const;
/// Returns the value of the color.
float v() const;
///@}
/// \name Setters
///@{
/// Sets the red part of the color.
void r(float red);
/// Sets the green part of the color.
void g(float green);
/// Sets the blue part of the color.
void b(float blue);
/// Sets the hue of the color.
void h(float hue);
/// Sets the saturation of the color.
void s(float saturation);
/// Sets the value of the color.
void v(float value);
///@}
/// Inverts the color.
Color3f const inverted() const;
/// Brightens the color if it is too dark
Color3f const brightened() const;
/// Calls glColor3f() with the values of this color.
void gl3f() const;
/// Calls glColor3f() with the values of this color.
void gl4f(float alpha = 1.f) const;
/// Returns an equivalent SFML Color.
sf::Color const sfColor() const;
/// Creates a random color struct.
static const Color3f random();
private:
/// Helper function to set the RGB values from HSV values.
void setHSV (float hue, float saturation, float value);
/// \name Data
/// The members storing the color information in RGB values.
/// They are clamped from 0.0 to 1.0
///@{
float r_, g_ , b_;
///@}
};
/// Multiplication of a color with a float.
Color3f operator* (float const& lhs, Color3f rhs);
Color3f operator* (Color3f const& lhs, float rhs);
/// Addition of two colors. Clamped.
Color3f operator+ (Color3f const& lhs, Color3f const& rhs);
/// Subtraction of two colors. Clamped.
Color3f operator- (Color3f const& lhs, Color3f const& rhs);
/// Division of a color by a float.
Color3f operator/ (Color3f const& lhs, float rhs);
# endif //COLOR4F_HPP_INCLUDED
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