public static ConnectionRoute DrawRouteBetweenShapes(
this Canvas InCanvas, Shape Shape1, Shape Shape2)
{
ConnectionRoute selectedRoute = null;
// for each direction from the from shape.
var possibleRoutes = new List <ConnectionRoute>();
foreach (var dir in WhichDirectionExt.Directions())
{
var side = new ShapeSide(Shape1, dir.ToSide());
var route = new ConnectionRoute(side, Shape2);
{
var leg = route.DrawInitialLegToShape();
if (leg == null)
{
continue;
}
route.AddLeg(leg);
}
while (true)
{
if (Shape2.Intersects(route.LastLeg.End))
{
break;
}
var leg = route.DrawLegToShape();
route.AddLeg(leg);
}
// add the route to the possible routes list.
possibleRoutes.Add(route);
}
// select the route with the fewest number of legs.
foreach (var route in possibleRoutes)
{
if (selectedRoute == null)
{
selectedRoute = route;
}
else if (route.LegCount < selectedRoute.LegCount)
{
selectedRoute = route;
}
}
if (selectedRoute != null)
{
InCanvas.DrawLinesOfRoute(selectedRoute);
Shape1.StoreConnection(selectedRoute, Shape2);
Shape2.StoreConnection(selectedRoute, Shape1);
}
return(selectedRoute);
}
/// <summary>
/// map out a route from shape1 to shape2, starting from a specific side of shape1.
/// </summary>
/// <param name="InCanvas"></param>
/// <param name="Shape1"></param>
/// <param name="Shape2"></param>
/// <param name="DepartureSide"></param>
/// <param name="Route"></param>
public static void DrawRouteBetweenShapes(
this Canvas InCanvas, Shape Shape1, Shape Shape2,
WhichSide DepartureSide,
ConnectionRoute Route)
{
// vertical and horizontal intersection of the two shapes.
var vi = ShapeExt.VerticalIntersect(Shape1, Shape2);
var hi = ShapeExt.HorizontalIntersect(Shape1, Shape2);
if (DepartureSide == WhichSide.Left)
{
LineCoordinates coor = null;
if (Shape1.IsEntirelyToTheRightOf(Shape2).GetValueOrDefault() && (vi.Length > 0))
{
coor = InCanvas.DrawLineBetweenShapes(
Shape1, WhichSide.Left, Shape2, WhichSide.Right);
}
else
{
// draw a short line from the shape to the next available orbit location
// around the from shape.
var leg = ConnectionLeg.DrawLegToOrbit(Shape1, DepartureSide);
Route.AddLeg(leg);
}
}
}