// Determine the path between controls, and the drop targets.
SymPath PathBetweenControls(ControlPosition controlPosition1, ControlPosition controlPosition2, ForkPosition forkStart, out List <DropTarget> dropTargets)
{
float xStart = controlPosition1.x;
float yStart = controlPosition1.y;
float xEnd = controlPosition2.x;
float yEnd = controlPosition2.y;
dropTargets = new List <DropTarget>();
if (forkStart != null)
{
if (forkStart.loopFallThru)
{
dropTargets.Add(new DropTarget(xEnd, yEnd - 0.5F, LegInsertionLoc.Normal));
}
else if (forkStart.loopStart)
{
dropTargets.Add(new DropTarget(forkStart.x, forkStart.y - 0.5F, LegInsertionLoc.Normal));
}
else
{
dropTargets.Add(new DropTarget(xStart, yStart + 0.5F, LegInsertionLoc.PreSplit));
dropTargets.Add(new DropTarget(forkStart.x, forkStart.y - 0.5F, LegInsertionLoc.Normal));
if (forkStart.x != xEnd)
{
// Empty fork.
dropTargets.Add(new DropTarget(xEnd, yEnd - 0.5F, LegInsertionLoc.PostJoin));
}
}
}
else if (xEnd != xStart)
{
// Below start control (use when a join is going)
dropTargets.Add(new DropTarget(xStart, yStart + 0.5F, LegInsertionLoc.Normal));
if (yEnd > yStart)
{
// Right before join point.
dropTargets.Add(new DropTarget(xEnd, yEnd - 0.5F, LegInsertionLoc.PostJoin));
}
}
else if (yEnd > yStart + 1.25)
{
// Straight down, but must have join at end.
dropTargets.Add(new DropTarget(xStart, yStart + 0.5F, LegInsertionLoc.Normal));
dropTargets.Add(new DropTarget(xEnd, yEnd - 0.5F, LegInsertionLoc.PostJoin));
}
else
{
// Above end control (other cases).
dropTargets.Add(new DropTarget(xEnd, yEnd - 0.5F, LegInsertionLoc.Normal));
}
bool startHorizontal = false;
if (forkStart != null)
{
startHorizontal = forkStart.loopStart;
}
if (forkStart != null && forkStart.x != controlPosition2.x)
{
// The fork start in a different horizontal position than it ends. This is probably due to a fork with no controls on it.
// Create the path in two pieces.
float xMiddle = forkStart.x;
float yMiddle = forkStart.y;
SymPath path1 = PathFromStartToEnd(xStart, yStart, xMiddle, yMiddle, startHorizontal, 0);
SymPath path3 = PathFromStartToEnd(xMiddle, yMiddle, xEnd, yEnd, false, controlPosition2.loopBottom);
SymPath path2 = new SymPath(new[] { path1.LastPoint, path3.FirstPoint });
return(SymPath.Join(SymPath.Join(path1, path2, PointKind.Normal), path3, PointKind.Normal));
}
else
{
return(PathFromStartToEnd(xStart, yStart, xEnd, yEnd, startHorizontal, controlPosition2.loopBottom));
}
}