protected override bool WorldDraw(WorldDraw draw)
{
var line = new Line(_startPoint, _currentPoint)
{
ColorIndex = PlinesEditFunction.HelpGeometryColor
};
draw.Geometry.Draw(line);
_polyline.SetBulgeAt(_vertex, _startBulge);
// polyline edit
var tangent = _currentPoint - _startPoint;
int?nextVertex;
if (_vertex != _polyline.NumberOfVertices - 1)
{
nextVertex = _vertex + 1;
}
else if (_polyline.Closed)
{
nextVertex = 0;
}
else
{
return(true);
}
// ReSharper disable once ConditionIsAlwaysTrueOrFalse
if (nextVertex != null)
{
var chordVector = _polyline.GetPoint3dAt(nextVertex.Value) - _startPoint;
// По касательной
if (_workType.Equals("Tangent"))
{
var bulge = Math.Tan(tangent.GetAngleTo(chordVector) / 2);
if (tangent.GetAngleTo(chordVector, _polyline.Normal) > Math.PI)
{
bulge = -bulge;
}
_polyline.SetBulgeAt(_vertex, bulge);
draw.Geometry.Draw(_polyline);
}
// По точке прохождения
else if (_workType.Equals("Point"))
{
// Строим вспомогательную геометрию в виде дуги для получения полного угла
var cArc = new CircularArc3d(_startPoint, _currentPoint, _polyline.GetPoint3dAt(nextVertex.Value));
var angle = cArc.ReferenceVector.AngleOnPlane(new Plane(cArc.Center, cArc.Normal));
var arc = new Arc(cArc.Center, cArc.Normal, cArc.Radius,
cArc.StartAngle + angle, cArc.EndAngle + angle);
var bulge = Math.Tan(arc.TotalAngle / 4);
if (tangent.GetAngleTo(chordVector, _polyline.Normal) > Math.PI)
{
bulge = -bulge;
}
_polyline.SetBulgeAt(_vertex, bulge);
draw.Geometry.Draw(_polyline);
}
}
return(true);
}