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#ifndef _COLOR_MAP_H
#define _COLOR_MAP_H
#include <QColor>
#include <stdlib.h>
#include <iostream>
inline QColor generate_color(double h,
double s_min = 0.35)
{
std::size_t s_max = 255;
if(h > 0.8 && h < 0.95) // span of ugly pink, desaturates make it less garish IMO
s_max = 160;
std::size_t s = std::rand() % (s_max-static_cast<std::size_t>(s_min*255)) + static_cast<int>(s_min*255);
return QColor::fromHsvF(h, s/255.0, 1.0);
}
template <typename Output_color_iterator>
Output_color_iterator
compute_color_map(QColor base_color,
std::size_t nb_of_colors,
Output_color_iterator out)
{
const qreal step = (static_cast<qreal>(0.85)) / nb_of_colors;
qreal hue = base_color.hueF();
qreal h = (hue == -1) ? 0 : hue;
for(std::size_t i=0; i<nb_of_colors; ++i)
{
if(h != -1)
h += step;
if(h > 1)
h -= 1;
*out++ = generate_color(h);
}
return out;
}
template <typename Output_color_iterator>
Output_color_iterator
compute_deterministic_color_map(QColor base_color,
std::size_t nb_of_colors,
Output_color_iterator out)
{
qreal hue = base_color.hueF();
qreal saturation = base_color.saturationF();
qreal value = base_color.valueF();
const qreal hue_step = (hue == -1) ? 0 : (static_cast<qreal>(1)) / nb_of_colors;
if (hue == -1)
hue = 0;
for(std::size_t i=0; i<nb_of_colors; ++i)
{
hue += hue_step;
if(hue > 1)
hue -= 1;
*out++ = QColor::fromHsvF(hue, saturation, value);
}
return out;
}
inline QColor generate_random_color()
{
std::size_t h = static_cast<std::size_t>(std::rand() % 360);
return generate_color(h / 359.0);
}
#endif // _COLOR_MAP_H
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