protected GameLine SelectLine(TrackWriter trk, Vector2d position, out bool knob)
{
knob = false;
var zoom = game.Track.Zoom;
var ends = LineEndsInRadius(trk, position, SnapRadius);
if (ends.Length > 0)
{
knob = true;
return(ends[0]);
}
var lines =
trk.GetLinesInRect(
new DoubleRect((Vector2d)position - new Vector2d(24, 24),
new Vector2d(24 * 2, 24 * 2)),
false);
foreach (var line in lines)
{
double lnradius = line.Width;
var angle = Angle.FromLine(line.Position, line.Position2);
var rect = Utility.GetThickLine(
line.Position,
line.Position2,
angle,
lnradius * 2);
if (Utility.PointInRectangle(rect,
position))
{
return(line);
}
}
return(null);
}
/// <summary>
/// Gets lines near the point by radius.
/// does not support large distances as it only gets a small number of grid cells
/// </summary>
/// <returns>a sorted array of lines where 0 is the closest point</returns>
public GameLine[] LinesInRadius(TrackWriter trk, Vector2d position, double rad)
{
SortedList <int, GameLine> lines = new SortedList <int, GameLine>();
var inrect =
trk.GetLinesInRect(new DoubleRect(position - new Vector2d(24, 24), new Vector2d(24 * 2, 24 * 2)),
false);
var circle = Rendering.StaticRenderer.GenerateCircle(position.X, position.Y, rad, 8);
var ends = LineEndsInRadius(trk, position, rad);
foreach (var line in ends)
{
lines[line.ID] = line;
}
foreach (var line in inrect)
{
if (lines.ContainsKey(line.ID))
{
continue;
}
var angle = Angle.FromLine(line.Position, line.Position2);
var rect = Utility.GetThickLine(
line.Position,
line.Position2,
angle,
line.Width * 2);
if (Utility.PointInRectangle(rect, position))
{
lines.Add(line.ID, line);
continue;
}
else
{
for (int i = 0; i < circle.Length; i++)
{
if (Utility.PointInRectangle(rect, circle[i]))
{
lines.Add(line.ID, line);
break;
}
}
}
}
GameLine[] ret = new GameLine[lines.Count];
for (int i = 0; i < ret.Length; i++)
{
ret[i] = lines.Values[(lines.Count - 1) - i];
}
return(lines.Values.ToArray());
}
