/// <summary>
/// Determine how much the two shapes vertically intersect each other.
/// </summary>
/// <param name="Shape1"></param>
/// <param name="Shape2"></param>
/// <returns></returns>
public static VerticalIntersect VerticalIntersect(Shape Shape1, Shape Shape2)
{
var side1 = Shape1.GetSide(WhichSide.Left);
var side2 = Shape2.GetSide(WhichSide.Left);
var vi = LineCoordinates.VerticalIntersect(side1, side2);
return vi;
}
public static LineCoordinates DrawLineBetweenShapes(
this Canvas InCanvas, Shape Shape1, WhichSide WhichSide1,
Shape Shape2, WhichSide WhichSide2)
{
LineCoordinates betLine = null;
var coor1 = Shape1.GetSide(WhichSide1);
var coor2 = Shape2.GetSide(WhichSide2);
// line runs from the midpoint of one side to the mid point of the other.
betLine = new LineCoordinates(coor1.MidPoint, coor2.MidPoint);
// draw a vertical line between the shapes.
if ((WhichSide1 == WhichSide.Bottom) && (WhichSide2 == WhichSide.Top))
{
var hi = LineCoordinates.HorizontalIntersect(coor1, coor2);
if (hi.Length > 0)
{
double centeredIntersect1 = hi.Line1Ofs + (hi.Length / 2);
Point fromPt = coor1.CalcHorizontalPointOnLine(centeredIntersect1);
double centeredIntersect2 = hi.Line2Ofs + (hi.Length / 2);
Point toPt = coor2.CalcHorizontalPointOnLine(centeredIntersect2);
betLine = new LineCoordinates(fromPt, toPt);
}
}
// draw a horizontal line between the shapes.
else if ((WhichSide1 == WhichSide.Right) && (WhichSide2 == WhichSide.Left))
{
var vi = LineCoordinates.VerticalIntersect(coor1, coor2);
if (vi.Length > 0)
{
double centeredIntersect1 = vi.Line1Ofs + (vi.Length / 2);
Point fromPt = coor1.CalcVerticalPointOnLine(centeredIntersect1);
double centeredIntersect2 = vi.Line2Ofs + (vi.Length / 2);
Point toPt = coor2.CalcVerticalPointOnLine(centeredIntersect2);
betLine = new LineCoordinates(fromPt, toPt);
}
}
// get horizontal intersect between the two lines
// return the intersect as from and to pos,
// get center pos of the horizontal intersect
return(betLine);
}
/// <summary>
/// return the direction from a point to the shape.
/// </summary>
/// <param name="Shape"></param>
/// <param name="FromPoint"></param>
/// <returns></returns>
public SideToShapeInfo(ShapeSide Side, Shape Shape)
{
this.Side = Side;
this.Shape = Shape;
WhichDirection? horizDir = null;
LineCoordinates horizSide = null;
HorizontalIntersect horizIntersect = null;
WhichDirection? vertDir = null;
LineCoordinates vertSide = null;
VerticalIntersect vertIntersect = null;
var br = Shape.GetBoundedRect();
if (Side.LineCoor.TopMost > br.Bottom)
{
vertDir = WhichDirection.Up;
horizSide = Shape.GetSide(WhichSide.Bottom);
if (Side.LineCoor.IsHorizontal)
{
horizIntersect = LineCoordinates.HorizontalIntersect(Side.LineCoor, horizSide);
}
}
else if (Side.LineCoor.BottomMost < br.Top)
{
vertDir = WhichDirection.Down;
horizSide = Shape.GetSide(WhichSide.Top);
if (Side.LineCoor.IsHorizontal)
{
horizIntersect = LineCoordinates.HorizontalIntersect(Side.LineCoor, horizSide);
}
}
if (Side.LineCoor.LeftMost > br.Right)
{
horizDir = WhichDirection.Left;
vertSide = Shape.GetSide(WhichSide.Right);
if (Side.LineCoor.IsVertical)
{
vertIntersect = LineCoordinates.VerticalIntersect(Side.LineCoor, vertSide);
}
}
else if (Side.LineCoor.RightMost < br.Left)
{
horizDir = WhichDirection.Right;
vertSide = Shape.GetSide(WhichSide.Left);
if (Side.LineCoor.IsVertical)
{
vertIntersect = LineCoordinates.VerticalIntersect(Side.LineCoor, vertSide);
}
}
// setup the vertical side of the shape that faces the side.
if (vertSide == null)
{
var rightSide = new ShapeSide(Shape, WhichSide.Right);
var leftSide = new ShapeSide(Shape, WhichSide.Left);
if (Side.RightMost > rightSide.RightMost)
{
vertSide = rightSide.LineCoor;
}
else if (Side.LeftMost < leftSide.LeftMost)
{
vertSide = leftSide.LineCoor;
}
}
// setup the horizontal side of the shape that faces the side.
if (horizSide == null)
{
var bottomSide = new ShapeSide(Shape, WhichSide.Bottom);
var topSide = new ShapeSide(Shape, WhichSide.Top);
if (Side.BottomMost > bottomSide.BottomMost)
{
horizSide = bottomSide.LineCoor;
}
else if (Side.TopMost < topSide.TopMost)
{
horizSide = topSide.LineCoor;
}
}
this.HorizDirection = horizDir;
this.HorizSide = horizSide;
this.HorizIntersect = horizIntersect;
this.VertDirection = vertDir;
this.VertSide = vertSide;
this.VertIntersect = vertIntersect;
}
