public bool IsValid(IList <Point> routeGridPoints, Point gridPointClicked)
{
if ((routeGridPoints == null) | (routeGridPoints.Count == 0))
{
// very first click - nothing to validate here
return(true);
}
if (routeGridPoints.Count == 1)
{
return(CarHelper.CheckSecondPoint(routeGridPoints.Last(), gridPointClicked));
}
return(CarHelper.CheckNextPoint
(routeGridPoints[routeGridPoints.Count - 2], routeGridPoints.Last(), gridPointClicked, mAcceleration));
}
/// <summary>
/// Get the list of candidate grid points, i.e. the possible grid points for the next move
/// </summary>
/// <returns></returns>
public IList <Point> GetCandidateGridPoints(IList <Point> routeGridPoints)
{
IList <Point> cgp;
if (routeGridPoints.Count == 0)
{
// nothing to do, return empty list
cgp = new List <Point>();
}
else if (routeGridPoints.Count == 1)
{
// special case, we are on the starting line
Point currentPosition = routeGridPoints.Last();
double leftX = currentPosition.X - mAcceleration;
double rightX = currentPosition.X + mAcceleration;
double topY = currentPosition.Y - mAcceleration;
double bottomY = currentPosition.Y - 1; // need to be above the starting line
cgp = AddCandidates(leftX, rightX, topY, bottomY);
}
else
{
// standard case, we have a movement vector
Point currentPosition = routeGridPoints.Last();
Point previousPosition = routeGridPoints[routeGridPoints.Count - 2];
Point nextMiddlePoint = CarHelper.CalculateNextMiddlePoint(previousPosition, currentPosition);
// now collect all points that are around the nextMiddlePoint, including the nextMiddlePoint
double leftX = nextMiddlePoint.X - mAcceleration;
double rightX = nextMiddlePoint.X + mAcceleration;
double topY = nextMiddlePoint.Y - mAcceleration;
double bottomY = nextMiddlePoint.Y + mAcceleration;
cgp = AddCandidates(leftX, rightX, topY, bottomY);
}
return(cgp);
}