forked from Makuna/NeoPixelBus
78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
|
/*-------------------------------------------------------------------------
|
||
|
|
HslColor provides a color object that can be directly consumed by NeoPixelBus
|
||
|
|
|
||
|
|
Written by Michael C. Miller.
|
||
|
|
|
||
|
|
I invest time and resources providing this open source code,
|
||
|
|
please support me by dontating (see https://github.com/Makuna/NeoPixelBus)
|
||
|
|
|
||
|
|
-------------------------------------------------------------------------
|
||
|
|
This file is part of the Makuna/NeoPixelBus library.
|
||
|
|
|
||
|
|
NeoPixelBus is free software: you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU Lesser General Public License as
|
||
|
|
published by the Free Software Foundation, either version 3 of
|
||
|
|
the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
NeoPixelBus 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 Lesser General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Lesser General Public
|
||
|
|
License along with NeoPixel. If not, see
|
||
|
|
<http://www.gnu.org/licenses/>.
|
||
|
|
-------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
#include "RgbColor.h"
|
||
|
|
#include "HslColor.h"
|
||
|
|
|
||
|
|
|
||
|
|
HslColor::HslColor(RgbColor color)
|
||
|
|
{
|
||
|
|
// convert colors to float between (0.0 - 1.0)
|
||
|
|
float r = color.R / 255.0f;
|
||
|
|
float g = color.G / 255.0f;
|
||
|
|
float b = color.B / 255.0f;
|
||
|
|
|
||
|
|
float max = (r > g && r > b) ? r : (g > b) ? g : b;
|
||
|
|
float min = (r < g && r < b) ? r : (g < b) ? g : b;
|
||
|
|
|
||
|
|
float h, s, l;
|
||
|
|
l = (max + min) / 2.0f;
|
||
|
|
|
||
|
|
if (max == min)
|
||
|
|
{
|
||
|
|
h = s = 0.0f;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
float d = max - min;
|
||
|
|
s = (l > 0.5f) ? d / (2.0f - (max + min)) : d / (max + min);
|
||
|
|
|
||
|
|
if (r > g && r > b)
|
||
|
|
{
|
||
|
|
h = (g - b) / d + (g < b ? 6.0f : 0.0f);
|
||
|
|
}
|
||
|
|
else if (g > b)
|
||
|
|
{
|
||
|
|
h = (b - r) / d + 2.0f;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
h = (r - g) / d + 4.0f;
|
||
|
|
}
|
||
|
|
h /= 6.0f;
|
||
|
|
}
|
||
|
|
|
||
|
|
H = h;
|
||
|
|
S = s;
|
||
|
|
L = l;
|
||
|
|
}
|
||
|
|
|
||
|
|
HslColor HslColor::LinearBlend(HslColor left, HslColor right, float progress)
|
||
|
|
{
|
||
|
|
return HslColor(left.H + ((right.H - left.H) * progress),
|
||
|
|
left.S + ((right.S - left.S) * progress),
|
||
|
|
left.L + ((right.L - left.L) * progress));
|
||
|
|
}
|