V2

src/HsbColor.cpp

@@ -0,0 +1,75 @@
+/*-------------------------------------------------------------------------
+HsbColor 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 "HsbColor.h"
+
+
+HsbColor::HsbColor(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 d = max - min;
+
+    float h = 0.0; 
+    float v = max;
+    float s = (v == 0.0f) ? 0 : (d / v);
+
+    if (d != 0.0f)
+    {
+        if (r == max)
+        {
+            h = (g - b) / d + (g < b ? 6.0f : 0.0f);
+        }
+        else if (g == max)
+        {
+            h = (b - r) / d + 2.0f;
+        }
+        else
+        {
+            h = (r - g) / d + 4.0f;
+        }
+        h /= 6.0f;
+    }
+
+
+    H = h;
+    S = s;
+    B = v;
+}
+
+HsbColor HsbColor::LinearBlend(HsbColor left, HsbColor right, float progress)
+{
+    return HsbColor(left.H + ((right.H - left.H) * progress),
+        left.S + ((right.S - left.S) * progress),
+        left.B + ((right.B - left.B) * progress));
+}