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divergentcolorscale.cpp
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#include "divergentcolorscale.h"
#include <cmath>
DivergentColorScale::DivergentColorScale(const QColor &color1,
const QColor &colorMiddle,
const QColor &color2)
: ColorScale{{color1, colorMiddle, color2}}
{
}
QColor DivergentColorScale::color(float t) const
{
if (t < m_min || t > m_max) {
return QColor();
}
// normalize t
t /= std::max(fabs(m_max), fabs(m_min));
if (t > 0.0f) {
return ColorScale::lerp(m_colors[1], m_colors[2], t);
}
if (t < 0.0f) {
return ColorScale::lerp(m_colors[1], m_colors[0], -t);
}
return m_colors[1];
}
DivergentColorScale DivergentColorScale::builtin(BuiltinDivergentColorScale scale)
{
switch (scale) {
case RedGrayBlue:
return DivergentColorScale(QColor(68, 68, 221),
QColor(189, 189, 189),
QColor(221, 68, 68));
/*return ContinuousColorScale{
QColor(221, 68, 68),
QColor(220, 69, 68),
QColor(220, 70, 69),
QColor(220, 71, 70),
QColor(220, 73, 71),
QColor(220, 74, 72),
QColor(220, 75, 73),
QColor(220, 77, 74),
QColor(220, 78, 75),
QColor(220, 79, 76),
QColor(220, 80, 76),
QColor(220, 81, 77),
QColor(220, 83, 78),
QColor(220, 84, 79),
QColor(220, 85, 80),
QColor(220, 86, 81),
QColor(220, 87, 82),
QColor(220, 88, 83),
QColor(220, 89, 84),
QColor(220, 91, 85),
QColor(220, 92, 85),
QColor(220, 93, 86),
QColor(220, 94, 87),
QColor(220, 95, 88),
QColor(220, 96, 89),
QColor(220, 97, 90),
QColor(220, 98, 91),
QColor(219, 99, 92),
QColor(219, 100, 93),
QColor(219, 101, 94),
QColor(219, 102, 95),
QColor(219, 103, 95),
QColor(219, 104, 96),
QColor(219, 105, 97),
QColor(219, 106, 98),
QColor(219, 107, 99),
QColor(219, 108, 100),
QColor(218, 109, 101),
QColor(218, 110, 102),
QColor(218, 111, 103),
QColor(218, 112, 104),
QColor(218, 113, 105),
QColor(218, 114, 106),
QColor(218, 115, 107),
QColor(218, 116, 108),
QColor(217, 117, 108),
QColor(217, 118, 109),
QColor(217, 119, 110),
QColor(217, 120, 111),
QColor(217, 121, 112),
QColor(217, 122, 113),
QColor(217, 123, 114),
QColor(216, 124, 115),
QColor(216, 125, 116),
QColor(216, 126, 117),
QColor(216, 127, 118),
QColor(216, 127, 119),
QColor(215, 128, 120),
QColor(215, 129, 121),
QColor(215, 130, 122),
QColor(215, 131, 123),
QColor(215, 132, 124),
QColor(214, 133, 125),
QColor(214, 134, 126),
QColor(214, 135, 127),
QColor(214, 136, 127),
QColor(214, 137, 128),
QColor(213, 138, 129),
QColor(213, 138, 130),
QColor(213, 139, 131),
QColor(213, 140, 132),
QColor(212, 141, 133),
QColor(212, 142, 134),
QColor(212, 143, 135),
QColor(212, 144, 136),
QColor(211, 145, 137),
QColor(211, 146, 138),
QColor(211, 146, 139),
QColor(211, 147, 140),
QColor(210, 148, 141),
QColor(210, 149, 142),
QColor(210, 150, 143),
QColor(209, 151, 144),
QColor(209, 152, 145),
QColor(209, 153, 146),
QColor(208, 153, 147),
QColor(208, 154, 148),
QColor(208, 155, 149),
QColor(207, 156, 150),
QColor(207, 157, 151),
QColor(207, 158, 152),
QColor(206, 159, 153),
QColor(206, 160, 154),
QColor(206, 160, 155),
QColor(205, 161, 156),
QColor(205, 162, 157),
QColor(205, 163, 158),
QColor(204, 164, 159),
QColor(204, 165, 160),
QColor(203, 166, 161),
QColor(203, 166, 162),
QColor(203, 167, 163),
QColor(202, 168, 164),
QColor(202, 169, 165),
QColor(201, 170, 166),
QColor(201, 171, 167),
QColor(201, 171, 168),
QColor(200, 172, 169),
QColor(200, 173, 170),
QColor(199, 174, 171),
QColor(199, 175, 172),
QColor(198, 176, 173),
QColor(198, 177, 174),
QColor(197, 177, 175),
QColor(197, 178, 176),
QColor(196, 179, 177),
QColor(196, 180, 178),
QColor(195, 181, 179),
QColor(195, 182, 180),
QColor(194, 182, 181),
QColor(194, 183, 182),
QColor(193, 184, 183),
QColor(193, 185, 184),
QColor(192, 186, 185),
QColor(192, 187, 186),
QColor(191, 187, 187),
QColor(190, 188, 188),
QColor(190, 189, 189),
QColor(189, 189, 190),
QColor(189, 188, 190),
QColor(188, 187, 190),
QColor(187, 186, 191),
QColor(187, 185, 191),
QColor(186, 184, 191),
QColor(185, 183, 191),
QColor(185, 182, 192),
QColor(184, 181, 192),
QColor(184, 180, 192),
QColor(183, 179, 193),
QColor(182, 178, 193),
QColor(182, 177, 193),
QColor(181, 176, 194),
QColor(180, 175, 194),
QColor(180, 174, 194),
QColor(179, 173, 194),
QColor(178, 172, 195),
QColor(178, 171, 195),
QColor(177, 170, 195),
QColor(176, 169, 196),
QColor(176, 168, 196),
QColor(175, 167, 196),
QColor(174, 166, 196),
QColor(174, 165, 197),
QColor(173, 164, 197),
QColor(172, 163, 197),
QColor(172, 162, 197),
QColor(171, 161, 198),
QColor(170, 160, 198),
QColor(170, 159, 198),
QColor(169, 158, 199),
QColor(168, 157, 199),
QColor(167, 156, 199),
QColor(167, 155, 199),
QColor(166, 155, 200),
QColor(165, 154, 200),
QColor(165, 153, 200),
QColor(164, 152, 200),
QColor(163, 151, 201),
QColor(162, 150, 201),
QColor(162, 149, 201),
QColor(161, 148, 201),
QColor(160, 147, 202),
QColor(159, 146, 202),
QColor(159, 145, 202),
QColor(158, 144, 202),
QColor(157, 143, 203),
QColor(156, 142, 203),
QColor(155, 141, 203),
QColor(155, 140, 203),
QColor(154, 139, 204),
QColor(153, 138, 204),
QColor(152, 137, 204),
QColor(152, 136, 204),
QColor(151, 135, 205),
QColor(150, 134, 205),
QColor(149, 133, 205),
QColor(148, 132, 205),
QColor(147, 131, 206),
QColor(147, 130, 206),
QColor(146, 129, 206),
QColor(145, 128, 206),
QColor(144, 128, 207),
QColor(143, 127, 207),
QColor(142, 126, 207),
QColor(142, 125, 207),
QColor(141, 124, 208),
QColor(140, 123, 208),
QColor(139, 122, 208),
QColor(138, 121, 208),
QColor(137, 120, 209),
QColor(136, 119, 209),
QColor(135, 118, 209),
QColor(134, 117, 209),
QColor(133, 116, 209),
QColor(133, 115, 210),
QColor(132, 114, 210),
QColor(131, 113, 210),
QColor(130, 112, 210),
QColor(129, 111, 211),
QColor(128, 110, 211),
QColor(127, 109, 211),
QColor(126, 109, 211),
QColor(125, 108, 212),
QColor(124, 107, 212),
QColor(123, 106, 212),
QColor(122, 105, 212),
QColor(121, 104, 212),
QColor(120, 103, 213),
QColor(119, 102, 213),
QColor(118, 101, 213),
QColor(117, 100, 213),
QColor(115, 99, 213),
QColor(114, 98, 214),
QColor(113, 97, 214),
QColor(112, 96, 214),
QColor(111, 95, 214),
QColor(110, 94, 215),
QColor(109, 94, 215),
QColor(108, 93, 215),
QColor(106, 92, 215),
QColor(105, 91, 215),
QColor(104, 90, 216),
QColor(103, 89, 216),
QColor(101, 88, 216),
QColor(100, 87, 216),
QColor( 99, 86, 216),
QColor( 98, 85, 217),
QColor( 96, 84, 217),
QColor( 95, 83, 217),
QColor( 94, 82, 217),
QColor( 92, 81, 217),
QColor( 91, 80, 218),
QColor( 89, 80, 218),
QColor( 88, 79, 218),
QColor( 86, 78, 218),
QColor( 85, 77, 219),
QColor( 83, 76, 219),
QColor( 82, 75, 219),
QColor( 80, 74, 219),
QColor( 78, 73, 219),
QColor( 77, 72, 220),
QColor( 75, 71, 220),
QColor( 73, 70, 220),
QColor( 71, 69, 220),
QColor( 69, 68, 220),
QColor( 68, 68, 221)
};*/
default:
return DivergentColorScale::builtin(DivergentColorScale::RedGrayBlue);
}
}
DivergentColorScale *DivergentColorScale::builtin(BuiltinDivergentColorScale scale, void *)
{
switch (scale) {
case RedGrayBlue:
return new DivergentColorScale(QColor(68, 68, 221),
QColor(189, 189, 189),
QColor(221, 68, 68));
default:
return DivergentColorScale::builtin(DivergentColorScale::RedGrayBlue, nullptr);
}
}