*

Assets/Scripts/LMath.cs

@@ -0,0 +1,55 @@
+using UnityEngine;
+using System.Collections;
+
+public class LMath {
+	public static float frac(float value){
+		return value - (float)Mathf.FloorToInt(value);
+	}
+}
+
+public class SphericalCoordinate 
+{
+	private float polar;
+	private float elevation;
+	private Vector3 cartesian;
+
+	public float PolarAngle{
+		get{ return polar; }
+		set{ polar = value; UpdateCartesian(); }
+	}
+
+	public float ElevationAngle{
+		get{ return elevation; }
+		set{ elevation = value; UpdateCartesian(); }
+	}
+
+	public Vector3 Cartesian{
+		get{ return cartesian; }
+		set { UpdateSpherical(value); }
+	}
+
+	public SphericalCoordinate(){
+		UpdateCartesian();
+	}
+
+	private void UpdateCartesian(){
+		float a = Mathf.Cos(elevation);
+		cartesian.x = a * Mathf.Cos(polar);
+		cartesian.y = Mathf.Sin(elevation);
+		cartesian.z = a * Mathf.Sin(polar);
+	}
+
+	private void UpdateSpherical(Vector3 cartesianCoord){
+		if (cartesianCoord.x == 0.0f)
+			cartesianCoord.x = Mathf.Epsilon;
+		float radius = Mathf.Sqrt((cartesianCoord.x * cartesianCoord.x)
+		                          + (cartesianCoord.y * cartesianCoord.y)
+		                          + (cartesianCoord.z * cartesianCoord.z));
+
+		polar = Mathf.Atan(cartesianCoord.z / cartesianCoord.x);
+		if (cartesianCoord.x < 0.0f)
+			polar += Mathf.PI;
+		elevation = Mathf.Asin(cartesianCoord.y / radius);
+	}
+
+}