Implemented some tools. Also, implemented inventory.

src/math/GameMath.cpp

@@ -7,4 +7,33 @@
 
 #include <math/GameMath.h>
 
+namespace farmlands {
 
+static const float Sqrt2 = 1.41421356237309504880f;
+
+static const float DirectionVectorX[] =
+{
+	0, 1, 0, Sqrt2,		// none,   E,   N,  NE
+	-1, 0, -Sqrt2, 0,	//    W, inv,  NW, inv
+	0, Sqrt2, 0, 0, 	//    S,  SE, inv, inv
+	-Sqrt2, 0, 0, 0		//   SW, inv, inv, inv
+};
+
+static const float DirectionVectorY[] =
+{
+	0, 0, -1, -Sqrt2,	// none,   E,   N,  NE
+	0, 0, -Sqrt2, 0,	//    W, inv,  NW, inv
+	1, Sqrt2, 0, 0, 	//    S,  SE, inv, inv
+	Sqrt2, 0, 0, 0		//   SW, inv, inv, inv
+};
+
+void translate(float x, float y, model::Direction direction, float distance, float* outX, float *outY)
+{
+	float dx = DirectionVectorX[direction];
+	float dy = DirectionVectorY[direction];
+
+	*outX = x + dx * distance;
+	*outY = y + dy * distance;
+}
+
+}

src/math/GameMath.h

@@ -8,18 +8,23 @@
 #ifndef MATH_GAMEMATH_H_
 #define MATH_GAMEMATH_H_
 
-template<typename TVal, typename TMin, typename TMax>
-TVal clamp (TVal value, TMin min, TMax max)
-{
-	if (value < min)
-		return min;
+#include <model/Direction.h>
 
-	if (value > max)
-		return max;
+namespace farmlands {
+
+	template<typename TVal, typename TMin, typename TMax>
+	TVal clamp (TVal value, TMin min, TMax max)
+	{
+		if (value < min)
+			return min;
+
+		if (value > max)
+			return max;
+
+		return value;
+	}
+
+	void translate(float x, float y, model::Direction direction, float distance, float* outX, float *outY);
 
-	return value;
 }
-
-
-
 #endif /* MATH_GAMEMATH_H_ */