internal static Line2D GetParallelLine(Point p1, Point p2, Point directionPoint, double offset)
{
Point2D linePoint1 = new Point2D();
Point2D linePoint2 = new Point2D();
double dx = p1.X - p2.X;
double dy = p1.Y - p2.Y;
double leght = Math.Sqrt((dx) * (dx) + (dy) * (dy));
// Determine the direction of the offset.
offset *= GetPointPosition(p1, p2, directionPoint);
// This is the parallel line
linePoint1.X = (p1.X - offset * (dy) / leght);
linePoint2.X = (p2.X - offset * (dy) / leght);
linePoint1.Y = (p1.Y + offset * (dx) / leght);
linePoint2.Y = (p2.Y + offset * (dx) / leght);
Line2D parallelLine = new Line2D(linePoint1, linePoint2);
return parallelLine;
}
/// <summary>
/// Updates the position of the line.
/// </summary>
/// <param name="line">The new line.</param>
internal void Update(Line2D line)
{
Check.NotNull(line, "line");
this.Point1.X = line.Point1.X;
this.Point1.Y = line.Point1.Y;
this.Point2.X = line.Point2.X;
this.Point2.Y = line.Point2.Y;
}
/// <summary>
/// Creates a new instance of <see cref="TangibleObject"/>.
/// </summary>
/// <param name="point1">The first point.</param>
/// <param name="point2">The second point.</param>
/// <param name="point3">The third point. This should be the direction point.</param>
internal TangibleObject(TouchPoint point1, TouchPoint point2, TouchPoint point3)
{
Check.NotNull(point1, "point1");
Check.NotNull(point2, "point2");
Check.NotNull(point3, "point3");
// Validate the points
if (point1.IsDirectionPoint || point2.IsDirectionPoint)
throw new InvalidOperationException("The first two points should not be direction points!");
if (!point3.IsDirectionPoint)
throw new InvalidOperationException("No direction point specified!");
Points = new TouchPointCollection();
Points.AddPoint(point1);
Points.AddPoint(point2);
Points.AddPoint(point3);
// Create the bottom line
_bottomLine = new TouchLine(point1, point2);
// Calculate the top line
_topLine = CalculateTopLine(_bottomLine, point3);
_topLine.Owner = this;
// Set the owner of the points.
//Points.ForEach(p => p.Owner = this);
foreach (var point in Points)
{
point.Owner = this;
point.Changed += OnPointChanged;
}
}