private static int[] GetFieldCircle(Point point, double radiusX, double radiusY, FluidField2D field)
{
// Get the box that contains the return circle
var center = GetFieldPoint_XY(point, field);
var min = GetFieldPoint_XY(new Point(point.X - radiusX, point.Y - radiusY), field);
var max = GetFieldPoint_XY(new Point(point.X + radiusX, point.Y + radiusY), field);
// Get points that are inside the circle
List<int> retVal = new List<int>();
double maxDistance = ((radiusX * field.XSize) + (radiusY * field.YSize)) * .5d; // just take the average. TODO: see if inside the ellipse
double maxDistanceSquared = maxDistance * maxDistance;
for (int x = min.Item1; x <= max.Item1; x++)
{
for (int y = min.Item2; y <= max.Item2; y++)
{
double dx = x - center.Item1;
double dy = y - center.Item2;
double distanceSquared = (dx * dx) + (dy * dy);
if (distanceSquared <= maxDistanceSquared)
{
retVal.Add(field.GetK(x, y));
}
}
}
// Exit Function
return retVal.ToArray();
}
private static Tuple<int, double>[] GetFieldCircle(Point point, double radiusX, double radiusY, double valueCenter, double valueEdge, FluidField2D field)
{
// Get the box that contains the return circle
var center = GetFieldPoint_XY(new Point(point.X, point.Y), field);
var min = GetFieldPoint_XY(new Point(point.X - radiusX, point.Y - radiusY), field);
var max = GetFieldPoint_XY(new Point(point.X + radiusX, point.Y + radiusY), field);
// Get points that are inside the circle
List<Tuple<int, double>> retVal = new List<Tuple<int, double>>();
Vector radius = new Vector(radiusX * field.XSize, radiusY * field.YSize);
double maxDistance = ((radiusX * field.XSize) + (radiusY * field.YSize)) * .5d; // just take the average. TODO: see if inside the ellipse
double maxDistanceSquared = maxDistance * maxDistance;
for (int x = min.Item1; x <= max.Item1; x++)
{
for (int y = min.Item2; y <= max.Item2; y++)
{
double dx = x - center.Item1;
double dy = y - center.Item2;
double distanceSquared = (dx * dx) + (dy * dy);
if (distanceSquared <= maxDistanceSquared)
{
double distance = Math.Sqrt(distanceSquared);
retVal.Add(Tuple.Create(
field.GetK(x, y), // coordinates that the field wants
UtilityCore.GetScaledValue(valueCenter, valueEdge, 0, maxDistance, distance) // LERP
));
}
}
}
// Exit Function
return retVal.ToArray();
}
/// <summary>
/// This takes a point from 0 to 1, and returns the corresponding position in the field (what the field calls k)
/// </summary>
private static int GetFieldPoint(Point point, FluidField2D field)
{
var xy = GetFieldPoint_XY(point, field);
return field.GetK(xy.Item1, xy.Item2);
}