/// <summary>
/// Calculates a polycurve that defines the rectangular base of the transition section.
/// </summary>
/// <returns>The geometry of the rectangular section</returns>
private Polycurve GetRectangularSection()
{
// Note: The scale factor for the corner radius is chosen arbitrarily
double cornerRadius = Math.Min(this.RectangularHeight, this.RectangularWidth) / 12.0;
double halfWidth = this.RectangularWidth / 2.0;
double halfHeight = this.RectangularHeight / 2.0;
double XLength = this.RectangularWidth - 2.0 * cornerRadius;
double YLength = this.RectangularHeight - 2.0 * cornerRadius;
var positiveXSegment = new LineSegment(new Point(halfWidth, -YLength / 2.0, 0),
new Point(halfWidth, YLength / 2.0, 0));
var polycurveInLocal = new PolycurveGeometryBuilder()
.Append(positiveXSegment)
.AppendTangentArc(new Point(halfWidth - cornerRadius, halfHeight, 0.0))
.AppendTangentSegment(XLength)
.AppendTangentArc(new Point(-halfWidth, halfHeight - cornerRadius, 0.0))
.AppendTangentSegment(YLength)
.AppendTangentArc(new Point(-(halfWidth - cornerRadius), -halfHeight, 0.0))
.AppendTangentSegment(XLength)
.AppendTangentArc(new Point(halfWidth, -(halfHeight - cornerRadius), 0.0))
.GetPolycurve();
return(this.TransformToGlobal(polycurveInLocal));
}
public static dynamic GetTSObject(PolycurveGeometryBuilder dynObject)
{
if (dynObject is null)
{
return(null);
}
return(dynObject.teklaObject);
}
/// <summary>
/// Calculates four arcs that can be used to connect to the chamfered corners of the rectangular section for
/// the transition section. The order of the arcs is the same as the order of the arcs in the rectangular
/// section.
/// </summary>
/// <returns>Four arcs that form the circular section.</returns>
private Polycurve GetCircularSection()
{
var centerPoint = new Point(0, 0, this.TransitionLength);
var topRightStartPoint = new Point(this.CircularRadius, 0, this.TransitionLength);
var normalInLocal = new Vector(0, 0, 1);
var topRightArc = new Arc(centerPoint, topRightStartPoint, normalInLocal, Math.PI / 2.0);
var polycurveInLocal = new PolycurveGeometryBuilder()
.Append(topRightArc)
.AppendTangentArc(new Point(-this.CircularRadius, 0, this.TransitionLength))
.AppendTangentArc(new Point(0, -this.CircularRadius, this.TransitionLength))
.AppendTangentArc(topRightStartPoint)
.GetPolycurve();
return(this.TransformToGlobal(polycurveInLocal));
}
/// <summary>
/// Transforms a given polycurve in the local coordsys to global.
/// </summary>
/// <param name="curveInLocal">Curve in local coordinates.</param>
/// <returns>The transformed polycurve in global coordinates.</returns>
private Polycurve TransformToGlobal(Polycurve curveInLocal)
{
var coordSys = GetBaseCoordsys(this.BaseCentroid, this.Normal);
var toGlobal = MatrixFactory.FromCoordinateSystem(coordSys);
var transformedCurves = curveInLocal.Select(c => TransformGeometryByMatrix(c, toGlobal));
var builder = new PolycurveGeometryBuilder();
foreach (var curve in transformedCurves)
{
if (curve is Arc arc)
{
builder.Append(arc);
}
else if (curve is LineSegment segment)
{
builder.Append(segment);
}
}
return(builder.GetPolycurve());
}
