/// <summary>
/// Finds common neighbours between two coordinates
/// </summary>
/// <param name="otherCoords">Other Coords</param>
/// <returns>List of common neighbours</returns>
public List <FloatCoords> GetCommonNeighboursWith(Coords otherCoords)
{
CoordsCalculator otherCoordsCalculator = new CoordsCalculator((FloatCoords)otherCoords);
FloatCoords[] myNeighbours = GetNeighbours();
return(otherCoordsCalculator.GetNeighbours().Where(neighbour => myNeighbours.Contains(neighbour)).ToList());
}
/// <summary>
/// Gets all coords of cells on a ray with destination
/// </summary>
/// <param name="destination">Ray's end node</param>
/// <returns>List of coords the ray passes through</returns>
public List <Coords> GetCoordsOnRayWith(FloatCoords destination)
{
void AddCellsBetweenVerticalPoints(double startPoint, double endPoint, int xCoord, ref List <Coords> outputList)
{
// Switch start- and endpoints if necessary
if (startPoint > endPoint)
{
startPoint = endPoint + startPoint;
endPoint = Math.Ceiling(startPoint - endPoint);
startPoint = Math.Floor(startPoint - endPoint);
}
for (int i = (int)startPoint - 1; i <= endPoint + 1; i++)
{
Coords currentPoint = new Coords()
{
x = xCoord, y = i
};
CoordsCalculator coordsCalculator = new CoordsCalculator((FloatCoords)currentPoint);
List <Coords> cells = new List <Coords> {
currentPoint
};
cells.AddRange(coordsCalculator.GetNeighbours().Select(neighbour => (Coords)neighbour));
foreach (Coords cell in cells)
{
if (outputList.Contains(cell))
{
continue;
}
outputList.Add(cell);
}
}
}
List <Coords> coordsOnRay = new List <Coords>();
FloatCoords startCoords = this.coords;
// Switch start- and endpoints if necessary
if (startCoords.x > destination.x)
{
FloatCoords x = startCoords;
startCoords = destination;
destination = x;
}
double directionCoefficient = (double)destination.x > (double)startCoords.x ? ((double)destination.y - startCoords.y) / ((double)destination.x - startCoords.x) : (double)destination.y - startCoords.y;
FloatCoords previousCoords;
FloatCoords currentCoords = startCoords;
while (currentCoords.x <= destination.x)
{
previousCoords = currentCoords;
currentCoords.x++;
currentCoords.y += (float)directionCoefficient;
AddCellsBetweenVerticalPoints(previousCoords.y, currentCoords.y, (int)previousCoords.x, ref coordsOnRay);
}
return(coordsOnRay);
}
