Add skeleton for utilityAI framework

TacticalAI/UtilityAI_ResponseCurve.cpp

@@ -0,0 +1,57 @@
+#include "UtilityAI_ResponseCurve.h"
+
+#include <cmath>
+#include <algorithm>
+
+namespace UtilityAI
+{
+
+	float NormalizeInput(float value, float min, float max)
+	{
+		const float normalizedValue = (value - min) / (max - min);
+		return normalizedValue;
+	}
+
+	float CalculateResponse(float x, ResponseCurve curve)
+	{
+		const auto min = curve.min;
+		const auto max = curve.max;
+		const auto type = curve.type;
+		const auto m = curve.m;
+		const auto k = curve.k;
+		const auto b = curve.b;
+		const auto c = curve.c;
+
+		float input = std::clamp(x, min, max);
+		input = NormalizeInput(input, min, max);
+
+		float y = 0.0f;
+		// Polynomial
+		float n;
+		// Logistic
+		const float e = 2.71828f; // Euler's number. I think? Lecture slides did not explain if this is what it's supposed to be.
+		const float exponent = -input + c;
+		const float denominator = 1.0f + 1000.0f * e * pow(m, exponent);
+
+		switch ( type )
+		{
+			case Step:
+				if ( input != 0.0f ) { return 1.0f; }
+				else { return 0.0f; }
+			case Linear:
+			case Polynomial:
+				n = input - c;
+				y = m * pow(n, k) + b;
+				break;
+			case Logistic:
+				y = (k / denominator) + b;
+				break;
+				//case Logit: // Not implemented yet
+					//break;
+		}
+
+		y = std::clamp(y, 0.0f, 1.0f);
+		return y;
+	}
+
+}