Replace color with pbr-book inspired Spectrum class

1 files changed, 29 insertions, 0 deletions

diff --git a/src/core/spectrum.hpp b/src/core/spectrum.hpp
new file mode 100644
index 0000000..de9355d
--- /dev/null
+++ b/src/core/spectrum.hpp
@@ -0,0 +1,29 @@
+#ifndef SPECTRUM_H
+#define SPECTRUM_H
+
+#include "core/common.hpp"
+
+// Contains a RGB spectrum value
+class Spectrum {
+public:
+    Spectrum(double v = 0);
+    static Spectrum FromRGB(double r, double g, double b);
+
+    Spectrum &operator+=(const Spectrum &o);
+    Spectrum &operator*=(double o);
+    Spectrum operator+(const Spectrum &o) const;
+    Spectrum operator-(const Spectrum &o) const;
+    Spectrum operator*(const Spectrum &o) const;
+    Spectrum operator/(const Spectrum &o) const;
+
+    Spectrum clamp(double low = 0, double high = INFINITY) const;
+
+    double R() const { return c[0]; }
+    double G() const { return c[1]; }
+    double B() const { return c[2]; }
+
+private:
+    double c[3];
+};
+
+#endif