/// <summary>
/// Obtains the geometry for spans along this leg.
/// </summary>
/// <param name="pos">The position for the start of the leg.
/// <param name="bearing">The bearing of the leg.</param>
/// <param name="sfac">Scale factor to apply to distances.</param>
/// <param name="spans">Information for the spans coinciding with this leg.</param>
/// <returns>The sections along this leg</returns>
internal override ILineGeometry[] GetSpanSections(IPosition pos, double bearing, double sfac, SpanInfo[] spans)
{
var result = new ILineGeometry[spans.Length];
// A leg with just one span, but no observed distance is due to the fact that the Leg constructor
// that accepts a span count will always produce an array with at least one span (this covers cul-de-sacs
// defined only with a central angle). May be better to handle it there.
if (spans.Length == 1 && spans[0].ObservedDistance == null)
{
result[0] = new LineSegmentGeometry(pos, pos);
return(result);
}
double sinBearing = Math.Sin(bearing);
double cosBearing = Math.Cos(bearing);
IPosition sPos = pos;
IPosition ePos = null;
double edist = 0.0;
for (int i = 0; i < result.Length; i++, sPos = ePos)
{
edist += (spans[i].ObservedDistance.Meters * sfac);
ePos = new Position(pos.X + (edist * sinBearing), pos.Y + (edist * cosBearing));
result[i] = new LineSegmentGeometry(sPos, ePos);
}
return(result);
}
/// <summary>
/// Gets the position that is a specific distance from the start of this line.
/// </summary>
/// <param name="dist">The distance from the start of the line.</param>
/// <param name="result">The position found</param>
/// <returns>True if the distance is somewhere ON the line. False if the distance
/// was less than zero, or more than the line length (in that case, the position
/// found corresponds to the corresponding terminal point).</returns>
internal override bool GetPosition(ILength distance, out IPosition result)
{
IPosition[] data = m_Data;
if (data.Length == 2)
{
return(LineSegmentGeometry.GetPosition(data[0], data[1], distance.Meters, out result));
}
else
{
return(GetPosition(data, distance.Meters, out result));
}
}
internal void Draw() // was Paint
{
// Nothing to do if parallel points undefined.
if (m_South == null || m_North == null)
{
return;
}
Debug.Assert(m_Line != null);
ISpatialDisplay draw = m_Cmd.ActiveDisplay;
IDrawStyle solidStyle = EditingController.Current.Style(Color.Magenta);
IDrawStyle dottedStyle = new DottedStyle();
ArcFeature arc = m_Line.GetArcBase();
if (arc != null)
{
// The parallel portion is solid, while the remaining portion of the circle is dotted.
CircularArcGeometry cg = new CircularArcGeometry(arc.Circle.Center, m_South, m_North, arc.IsClockwise);
solidStyle.Render(draw, cg);
cg.IsClockwise = !cg.IsClockwise;
dottedStyle.Render(draw, cg);
}
else
{
// What's the bearing from the start to the end of the parallel?
double bearing = Geom.BearingInRadians(m_South, m_North);
// What's the max length of a diagonal crossing the entire screen?
double maxdiag = m_Cmd.MaxDiagonal;
// Project to a point below the southern end of the parallel, as
// well as a point above the northern end.
IPosition below = Geom.Polar(m_South, bearing + Constants.PI, maxdiag);
IPosition above = Geom.Polar(m_North, bearing, maxdiag);
LineSegmentGeometry.Render(below, m_South, draw, dottedStyle);
LineSegmentGeometry.Render(m_South, m_North, draw, solidStyle);
LineSegmentGeometry.Render(m_North, above, draw, dottedStyle);
// If we have an offset point, draw it in green.
if (m_Point != null)
{
m_Point.Draw(draw, Color.Green);
}
}
}
/// <summary>
/// Checks whether this closed shape intersects (overlaps) a line.
/// This assumes that a window-window overlap has already been checked for.
/// </summary>
/// <param name="line">The line to compare with the shape</param>
/// <returns>True if intersection found.</returns>
bool IsIntersect(LineGeometry line)
{
//IntersectionResult xres = new IntersectionResult(line);
//return (xres.IntersectMultiSegment(this) > 0);
IntersectionResult xres = new IntersectionResult(line);
// Intersect each segment of this shape with the line.
IPointGeometry[] data = this.Data;
for (int i = 1; i < data.Length; i++)
{
LineSegmentGeometry thisSeg = new LineSegmentGeometry(data[i - 1], data[i]);
if (xres.IntersectSegment(thisSeg) > 0)
{
return(true);
}
}
return(false);
}
/// <summary>
/// Draws the current state of the edit
/// </summary>
internal void Draw()
{
Debug.Assert(m_Line != null);
ISpatialDisplay view = ActiveDisplay;
// Figure out the positions for the ends of the parallel line (if any) ...
// Assume we already know both terminals.
IPosition start = m_Term1;
IPosition end = m_Term2;
// If either one is undefined, but a dialog for it is active,
// try to get the terminal from there instead.
if (m_TermDial1 != null && start == null)
{
start = m_TermDial1.TerminalPosition;
}
if (m_TermDial2 != null && end == null)
{
end = m_TermDial2.TerminalPosition;
}
// If they weren't actually defined, use the parallel points instead.
if (start == null)
{
start = m_Par1;
}
if (end == null)
{
end = m_Par2;
}
// If those weren't defined either, try to calculate them now.
if (end == null && Calculate())
{
start = m_Par1;
end = m_Par2;
}
// Any offset point
if (m_OffsetPoint != null)
{
m_OffsetPoint.Draw(view, Color.Green);
}
// Everything else should draw in usual command-style colour.
IDrawStyle style = EditingController.Current.Style(Color.Magenta);
IDrawStyle dottedStyle = new DottedStyle();
// If the reference line is a curve, get the curve info.
ArcFeature arc = m_Line.GetArcBase();
if (arc != null)
{
bool iscw = arc.IsClockwise;
// Reverse the direction if necessary.
if (m_IsReversed)
{
iscw = !iscw;
}
// Draw the parallel line (the rest of the circle being dotted).
if (start != null)
{
CircularArcGeometry parArc = new CircularArcGeometry(arc.Circle, start, end, iscw);
style.Render(view, parArc);
parArc.IsClockwise = !parArc.IsClockwise;
dottedStyle.Render(view, parArc);
}
}
else
{
// PARALLEL IS STRAIGHT
// If we've got something, figure out positions for dotted portion.
if (start != null)
{
// What's the max length of a diagonal crossing the entire screen?
double maxdiag = this.MaxDiagonal;
// What's the bearing from the start to the end of the parallel?
double bearing = Geom.BearingInRadians(start, end);
// Project to a point before the start end of the parallel, as
// well as a point after the end.
IPosition before = Geom.Polar(start, bearing + Constants.PI, maxdiag);
IPosition after = Geom.Polar(end, bearing, maxdiag);
LineSegmentGeometry.Render(before, start, view, dottedStyle);
LineSegmentGeometry.Render(start, end, view, style);
LineSegmentGeometry.Render(end, after, view, dottedStyle);
}
}
// Draw terminal positions (if defined).
if (m_Term1 != null)
{
style.Render(view, m_Term1);
}
if (m_Term2 != null)
{
style.Render(view, m_Term2);
}
// The terminal lines.
if (m_TermLine1 != null)
{
m_TermLine1.Render(view, style);
}
if (m_TermLine2 != null)
{
m_TermLine2.Render(view, style);
}
// Do the active dialog last so their stuff draws on top.
if (m_ParDial != null)
{
m_ParDial.Draw();
}
if (m_TermDial1 != null)
{
m_TermDial1.Draw();
}
if (m_TermDial2 != null)
{
m_TermDial2.Draw();
}
}
internal void Draw()
{
ISpatialDisplay display = m_Cmd.ActiveDisplay;
// Draw the line we're extending in a special colour (any highlighting it
// originally had should have been removed during LineExtensionControl_Load)
if (m_ExtendLine != null)
{
m_ExtendLine.Draw(display, Color.DarkBlue);
}
// If we're doing an update, draw the original extension in grey.
LineExtensionOperation pop = UpdateOp;
if (pop != null)
{
LineFeature origLine = pop.NewLine;
if (origLine != null)
{
origLine.Draw(display, Color.Gray);
}
PointFeature origPoint = pop.NewPoint;
if (origPoint != null)
{
origPoint.Draw(display, Color.Gray);
}
}
// Calculate the start and end points of the extension, initially
// assuming that it's a straight line extension.
IPosition start, end;
if (LineExtensionUI.Calculate(m_ExtendLine, m_IsExtendFromEnd, m_Length, out start, out end))
{
// Draw the straight extension line
IDrawStyle style = (m_WantLine ? new DrawStyle(Color.Magenta) : new DottedStyle(Color.Magenta));
LineSegmentGeometry seg = new LineSegmentGeometry(start, end);
seg.Render(display, style);
}
else
{
// Perhaps it's a circular arc ...
IPosition center;
bool iscw;
if (LineExtensionUI.Calculate(m_ExtendLine, m_IsExtendFromEnd, m_Length,
out start, out end, out center, out iscw))
{
// And draw the curve.
IDrawStyle style = (m_WantLine ? new DrawStyle(Color.Magenta) : new DottedStyle(Color.Magenta));
IPointGeometry c = PointGeometry.Create(center);
CircularArcGeometry arc = new CircularArcGeometry(c, start, end, iscw);
arc.Render(display, style);
}
else if (m_ExtendLine != null)
{
// Get the position we're extending from.
end = (m_IsExtendFromEnd ? m_ExtendLine.EndPoint : m_ExtendLine.StartPoint);
}
}
// If we actually got something, draw the end point.
if (end != null)
{
IDrawStyle style = m_Cmd.Controller.DrawStyle;
style.FillColor = Color.Magenta;
style.Render(display, end);
}
}
// Segment
internal uint Intersect(IPointGeometry start, IPointGeometry end)
{
ILineSegmentGeometry seg = new LineSegmentGeometry(start, end);
return(m_IntersectedObject.LineGeometry.IntersectSegment(this, seg));
}
internal override bool GetPosition(ILength dist, out IPosition pos)
{
return(LineSegmentGeometry.GetPosition(this, dist.Meters, out pos));
}
public override ILength Distance(IPosition point)
{
return(LineSegmentGeometry.GetDistance(this, point));
}
internal override void Render(ISpatialDisplay display, IDrawStyle style)
{
LineSegmentGeometry.Render(this, display, style);
}