Added support for HSV color space

SDLU/structures/Color.cpp

@@ -1,5 +1,7 @@
 #include "Color.hpp"
 
+#include <math.h>
+
 namespace sdlu
 {
     const Color Color::Black = Color(0, 0, 0);
@@ -43,4 +45,52 @@ namespace sdlu
         color |= a;
         return color;
     }
+
+    Color& Color::FromHSV(Uint16 h, Uint8 s, Uint8 v)
+    {
+        // Normalize parameters
+        // H : [0, 360)
+        // S : [0, 1]
+        // V : [0, 1]
+        h -= floor(h / 360) * 360;
+        s = (s > 1) ? 1 : s;
+        v = (v > 1) ? 1 : v;
+
+        // Convert to RGBA
+        Uint16 H = floor(h / 60.f);
+        float f = (h / 60.f) - H;
+
+        Uint8 p = static_cast<Uint8>((v * (1 - s)) * 255);
+        Uint8 q = static_cast<Uint8>((v * (1 - s * f)) * 255);
+        Uint8 t = static_cast<Uint8>((v * (1 - s * (1 - f))) * 255);
+        v *= 255;
+
+        Color output;
+        switch (H)
+        {
+        case 0:
+        case 6:
+            output = Color(v, t, p);
+            break;
+        case 1:
+            output = Color(q, v, p);
+            break;
+        case 2:
+            output = Color(p, v, t);
+            break;
+        case 3:
+            output = Color(p, q, v);
+            break;
+        case 4:
+            output = Color(t, p, v);
+            break;
+        case 5:
+            output = Color(v, p, q);
+            break;
+        default:
+            break;
+        }
+
+        return output;
+    }
 }

SDLU/structures/Color.hpp

@@ -53,6 +53,13 @@ namespace sdlu
          */
         Uint32 ToInt();
 
+        /**
+         * @brief Generate color from HSV values
+         *
+         * @return An RGBA Color object generated from HSV
+         */
+        static Color& FromHSV(Uint16 h, Uint8 s, Uint8 v);
+
 
         /////////////////// DEFAULT COLORS ///////////////////
 

SDLU_Example/main.cpp

@@ -9,6 +9,7 @@ int main(int argc, char** argv)
     window.SetMouseCursorGrabbed(true);
 
     SDL_Event event;
+    float t = 0.f;
     while (window.IsOpen())
     {
         while (window.PollEvent(&event))
@@ -21,9 +22,10 @@ int main(int argc, char** argv)
             }
         }
 
-        window.Clear(sdlu::Color::Magenta);
+        window.Clear(sdlu::Color::FromHSV(floor(t), 100, 100));
 
         window.Display();
+        t += 0.01;
     }
 
     SDL_Quit();