private Point getClosestPointAbove(Point point, double offset, ShapeNode node, double[,] mesh)
{
//search nearest point above offset - circular iteration should work here
var currentOffset = offset;
var bestPoint = new Point();
while (true)
{
var maxDistance = double.NegativeInfinity;
var spiralPoints = GetValidSpiralPoints(point, currentOffset);
foreach (var spiralPoint in spiralPoints)
{
var distance = GetBorderDistance(spiralPoint, mesh);
//var distance = getDistance(spiralPoint.X, spiralPoint.Y, node);
if (distance > maxDistance)
{
if (node.IntersectsWith(point, spiralPoint))
{
continue;
}
bestPoint = spiralPoint;
maxDistance = distance;
}
}
if (maxDistance < 0)
{
return(new Point(double.NaN, double.NaN));
}
if (maxDistance >= offset)
{
break;
}
currentOffset += meshStep;
}
return(bestPoint);
}
