/// <summary>
/// Trims selected entity by the cutting entity. Removes portion of the curve near mouse click.
/// </summary>
private void TrimEntity()
{
if (firstSelectedEntity == null)
{
if (selEntityIndex != -1)
{
firstSelectedEntity = Entities[selEntityIndex];
selEntityIndex = -1;
return;
}
}
else if (secondSelectedEntity == null)
{
if (selEntityIndex != -1)
{
secondSelectedEntity = Entities[selEntityIndex];
}
else
{
DrawSelectionMark(mouseLocation);
renderContext.EnableXOR(false);
DrawText(mouseLocation.X, (int)Size.Height - mouseLocation.Y + 10, "Select entity to be trimmed",
new Font("Tahoma", 8.25f), DrawingColor, ContentAlignment.BottomLeft);
}
}
if (firstSelectedEntity != null && secondSelectedEntity != null)
{
if (firstSelectedEntity is ICurve && secondSelectedEntity is ICurve)
{
ICurve trimmingCurve = firstSelectedEntity as ICurve;
ICurve curve = secondSelectedEntity as ICurve;
#if NURBS
Point3D[] intersetionPoints = Curve.Intersection(trimmingCurve, curve);
if (intersetionPoints.Length > 0 && points.Count > 0)
{
List <double> parameters = new List <double>();
for (int i = 0; i < intersetionPoints.Length; i++)
{
var intersetionPoint = intersetionPoints[i];
double t = ((InterPoint)intersetionPoint).s;
parameters.Add(t);
}
double distSelected = 1;
ICurve[] trimmedCurves = null;
if (parameters != null)
{
parameters.Sort();
double u;
curve.ClosestPointTo(points[0], out u);
distSelected = Point3D.Distance(points[0], curve.PointAt(u));
distSelected += distSelected / 1e3;
if (u <= parameters[0])
{
curve.SplitBy(new Point3D[] { curve.PointAt(parameters[0]) }, out trimmedCurves);
}
else if (u > parameters[parameters.Count - 1])
{
curve.SplitBy(new Point3D[] { curve.PointAt(parameters[parameters.Count - 1]) },
out trimmedCurves);
}
else
{
for (int i = 0; i < parameters.Count - 1; i++)
{
if (u > parameters[i] && u <= parameters[i + 1])
{
curve.SplitBy(
new Point3D[] { curve.PointAt(parameters[i]), curve.PointAt(parameters[i + 1]) },
out trimmedCurves);
}
}
}
}
bool success = false;
//Decide which portion of curve to be deleted
for (int i = 0; i < trimmedCurves.Length; i++)
{
ICurve trimmedCurve = trimmedCurves[i];
double t;
trimmedCurve.ClosestPointTo(points[0], out t);
{
if ((t < trimmedCurve.Domain.t0 || t > trimmedCurve.Domain.t1) ||
Point3D.Distance(points[0], trimmedCurve.PointAt(t)) > distSelected)
{
AddAndRefresh((Entity)trimmedCurve, secondSelectedEntity.LayerName);
success = true;
}
}
}
// Delete original entity to be trimmed
if (success)
{
Entities.Remove(secondSelectedEntity);
}
}
ClearAllPreviousCommandData();
#endif
}
}
}
/// <summary>
/// Tries to extend entity upto the selected boundary entity. For a short boundary line, it tries to extend selected
/// entity upto elongated line.
/// </summary>
private void ExtendEntity()
{
if (firstSelectedEntity == null)
{
if (selEntityIndex != -1)
{
firstSelectedEntity = Entities[selEntityIndex];
selEntityIndex = -1;
return;
}
}
else if (secondSelectedEntity == null)
{
DrawSelectionMark(mouseLocation);
renderContext.EnableXOR(false);
DrawText(mouseLocation.X, (int)Size.Height - mouseLocation.Y + 10, "Select entity to extend",
new Font("Tahoma", 8.25f), DrawingColor, ContentAlignment.BottomLeft);
}
if (secondSelectedEntity == null)
{
if (selEntityIndex != -1)
{
secondSelectedEntity = Entities[selEntityIndex];
}
}
if (firstSelectedEntity != null && secondSelectedEntity != null)
{
if (firstSelectedEntity is ICurve && secondSelectedEntity is ICurve)
{
ICurve boundary = firstSelectedEntity as ICurve;
ICurve curve = secondSelectedEntity as ICurve;
// Check which end of curve is near to boundary
double t1, t2;
boundary.ClosestPointTo(curve.StartPoint, out t1);
boundary.ClosestPointTo(curve.EndPoint, out t2);
Point3D projStartPt = boundary.PointAt(t1);
Point3D projEndPt = boundary.PointAt(t2);
double curveStartDistance = curve.StartPoint.DistanceTo(projStartPt);
double curveEndDistance = curve.EndPoint.DistanceTo(projEndPt);
bool success = false;
if (curveStartDistance < curveEndDistance)
{
if (curve is Line)
{
success = ExtendLine(curve, boundary, true);
}
else if (curve is LinearPath)
{
success = ExtendPolyLine(curve, boundary, true);
}
else if (curve is Arc)
{
success = ExtendCircularArc(curve, boundary, true);
}
else if (curve is EllipticalArc)
{
success = ExtendEllipticalArc(curve, boundary, true);
}
#if NURBS
else if (curve is Curve)
{
success = ExtendSpline(curve, boundary, true);
}
#endif
}
else
{
if (curve is Line)
{
success = ExtendLine(curve, boundary, false);
}
else if (curve is LinearPath)
{
success = ExtendPolyLine(curve, boundary, false);
}
else if (curve is Arc)
{
success = ExtendCircularArc(curve, boundary, false);
}
else if (curve is EllipticalArc)
{
success = ExtendEllipticalArc(curve, boundary, false);
}
#if NURBS
else if (curve is Curve)
{
success = ExtendSpline(curve, boundary, false);
}
#endif
}
if (success)
{
Entities.Remove(secondSelectedEntity);
Entities.Regen();
}
}
ClearAllPreviousCommandData();
}
}