/// <param name="initialVertex">Initial vertex must represent a bottom left corner</param>
private Vector2[] GetPolygon(MapVector initialVertex)
{
// Algorithm can be understood as moving around the area
// with a right hand touching the wall allthe time
// We start with moving right since its a bottom-left corner
IWallTracingStrategy strategy = new RightWallTracingStrategy(initialVertex, _fields);
var currentVertex = initialVertex;
var i = 0;
var output = new List <Vector2>();
do
{
i++;
output.Add(new Vector2(currentVertex.x, currentVertex.z));
_wasVisited[currentVertex.z, currentVertex.x] = true;
strategy = strategy.GoToNextVertex(out currentVertex);
} while (currentVertex != initialVertex);
return(output.ToArray());
}
private MapVector[] CheckAndTransformRectangle(Vector2[] rectangle)
{
if (rectangle.Length != 4)
{
throw new ApplicationException("Registered polygon is not a rectangle.");
}
var output = new MapVector[rectangle.Length];
for (var i = 0; i < rectangle.Length; i++)
{
var x = Mathf.RoundToInt(rectangle[i].x);
var z = Mathf.RoundToInt(rectangle[i].y);
if (Mathf.Abs(x - rectangle[i].x) + Mathf.Abs(z - rectangle[i].y) > 0.00001)
{
throw new ApplicationException("Sight blockers vertices are not on the grid");
}
output[i] = new MapVector(x, z);
}
return(output);
}
