documented new node classes

app/common/clamp.h

@@ -2,6 +2,16 @@
 #define CLAMP_H
 
 template<typename T>
+/**
+ * @brief Clamp a value between a minimum and a maximum value
+ *
+ * Similar to using min() and max() functions, but performs both at once. If value is less than minimum, this returns
+ * minimum. If it is more than maximum, this returns maximum. Otherwise it returns value as-is.
+ *
+ * @return
+ *
+ * Will always return a value between minimum and maximum (inclusive).
+ */
 T clamp(T value, T minimum, T maximum) {
   if (value < minimum) {
     return minimum;

app/common/lerp.h

@@ -2,6 +2,9 @@
 #define LERP_H
 
 template<typename T>
+/**
+ * @brief Linearly interpolate a value between a and b using t
+ */
 T lerp(T a, T b, double t) {
   return (a * (1.0 - t)) + (b * t);
 }