/// <summary>
/// Event handler for the <see cref="PickingTool.PreviewRequested"/> event.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="eventArgs">The <see cref="ToleratedObjectEventArgs"/> instance containing the event data.</param>
private void OnPreviewRequested(object sender, ToleratedObjectEventArgs eventArgs)
{
this.Graphics.Clear();
if (this.pickedPoints.Count < 1)
{
return;
}
var centroid = this.pickedPoints.Last();
var sectionLength = Distance.PointToPoint(eventArgs.HitPoint, centroid);
var distances = new[] { this.heightValueBox.Value, this.widthValueBox.Value, this.radiusValueBox.Value, sectionLength };
if (distances.Any(x => x < GeometryConstants.DISTANCE_EPSILON))
{
return;
}
var normal = new Vector(eventArgs.HitPoint - centroid);
var transitionSection = new TransitionSectionGeometry(
this.heightValueBox.Value,
this.widthValueBox.Value,
sectionLength,
this.radiusValueBox.Value,
centroid,
normal);
this.DrawTransitionSection(transitionSection);
}
/// <summary>
/// Gets a coordinate system aligned with the transition section.
/// </summary>
/// <param name="transitionSection">The section</param>
/// <returns>The coordsys.</returns>
public static CoordinateSystem GetSectionAlignedCoordsys(Component transitionSection)
{
var pointList = GetDefinitionPoints(transitionSection);
if (pointList.Count >= 2)
{
return(TransitionSectionGeometry.GetBaseCoordsys(pointList[0], new Vector(pointList[1] - pointList[0])));
}
return(new CoordinateSystem());
}
/// <summary>
/// Gets the rectangle, with the first segment being the right segment of the base, and going into counter
/// clockwise direction.
/// </summary>
/// <returns>The list of segments.</returns>
private List <LineSegment> GetRectangle()
{
var coordSys = DataFetcher.GetSectionAlignedCoordsys(this.Component);
var height = DataFetcher.GetBaseHeight(this.Component);
var width = DataFetcher.GetBaseWidth(this.Component);
var radius = DataFetcher.GetRadius(this.Component);
var length = DataFetcher.GetSectionLength(this.Component);
var geometry = new TransitionSectionGeometry(height, width, length, radius, coordSys.Origin, coordSys.AxisX.Cross(coordSys.AxisY));
return(geometry.RectangularSection.OfType <LineSegment>().ToList());
}
/// <summary>
/// Draws a preview of the transition section that will be inserted.
/// </summary>
/// <param name="geometry">Geometry of the transition section.</param>
private void DrawTransitionSection(TransitionSectionGeometry geometry)
{
this.DrawPolycurve(geometry.RectangularSection);
this.DrawPolycurve(geometry.CircularSection);
var conicalSections = geometry.RectangularSection
.OfType <Arc>()
.Zip(geometry.CircularSection.Select(c => c as Arc), (b, t) => new { Bottom = b, Top = t });
foreach (var cone in conicalSections)
{
this.Graphics.DrawLine(cone.Bottom.StartPoint, cone.Top.StartPoint);
this.Graphics.DrawLine(cone.Bottom.EndPoint, cone.Top.EndPoint);
}
}
/// <summary>
/// Draws the preview of the base of the transition section.
/// </summary>
/// <param name="width">Width of the base.</param>
/// <param name="height">Height of the base.</param>
private void DrawRectangle(double width, double height)
{
var coordSys = DataFetcher.GetSectionAlignedCoordsys(this.Component);
var radius = DataFetcher.GetRadius(this.Component);
var length = DataFetcher.GetSectionLength(this.Component);
var geometry = new TransitionSectionGeometry(height, width, length, radius, coordSys.Origin, coordSys.AxisX.Cross(coordSys.AxisY));
var rectangle = geometry.RectangularSection;
foreach (var curve in rectangle)
{
if (curve is LineSegment segment)
{
this.Graphics.DrawLine(segment.StartPoint, segment.EndPoint);
}
else if (curve is Arc arc)
{
this.Graphics.DrawArc(arc);
}
}
}
