private static List <BridgePoints> GetBridgeByArc(ArcBase arc, UnitPoint p1, UnitPoint p2, BridgingModel param)
{
List <BridgePoints> retPoints = new List <BridgePoints>();
var line = DrawingOperationHelper.GetLineEquation(p1, p2);
double width = param.Width / 2;
ArcModelMini arcMini = new DrawModel.ArcModelMini()
{
Center = arc.Center,
Radius = arc.Radius,
StartAngle = arc.StartAngle,
EndAngle = arc.EndAngle,
SweepAngle = arc.AngleSweep,
Clockwise = arc.IsClockwise
};
List <UnitPoint> points = DrawingOperationHelper.GetIntersectPointByLineAndCircle(line.Item1, line.Item2, line.Item3, arc.Center, arc.Radius);
var hasPoints = points?.Where(p => !p.IsEmpty && (HitUtil.IsPointOnArc(p, 0.000001f, arcMini) && HitUtil.IsPointInLine(p1, p2, p, 0.000001f))).ToList();
if (hasPoints != null && hasPoints.Count > 0)
{
//根据宽度求点
double angle = width / arc.Radius * (arc.IsClockwise ? 1 : -1);
hasPoints?.ForEach(p =>
{
double lineAngle = HitUtil.LineAngleR(arcMini.Center, p, 0);
double angle1 = lineAngle + angle;
double angle2 = lineAngle - angle;
UnitPoint retPoint1 = UnitPoint.Empty;
UnitPoint retPoint2 = UnitPoint.Empty;
if (HitUtil.IsPointInArc(HitUtil.RadiansToDegrees(angle1), arcMini.StartAngle, arcMini.EndAngle, arcMini.Clockwise))
{
//第一个位置点
retPoint1 = HitUtil.PointOnCircle(arcMini.Center, arcMini.Radius, angle1);
}
if (HitUtil.IsPointInArc(HitUtil.RadiansToDegrees(angle2), arcMini.StartAngle, arcMini.EndAngle, arcMini.Clockwise))
{
//第二个位置点
retPoint2 = HitUtil.PointOnCircle(arcMini.Center, arcMini.Radius, angle2);
}
BridgePoints bridges = new BridgePoints(arc,
new UnitPointBulge(retPoint1),
new UnitPointBulge(retPoint2),
HitUtil.Distance(p1, p));
retPoints.Add(bridges);
});
}
return(retPoints);
}
private float GetPercentInPolylineByPoint(IDrawObject drawObject, UnitPoint unitPoint)
{
MultiSegmentLineBase item = (MultiSegmentLineBase)drawObject;
int segment = DrawingOperationHelper.GetPointInLineIndex(item, unitPoint);
int nextIndex = (segment + 1 >= item.PointCount) ? 0 : segment + 1;
float percent;
if (double.IsNaN(item.Points[segment].Bulge))
{
double partLen = HitUtil.Distance(item.Points[segment].Point, unitPoint);
double allLen = HitUtil.Distance(item.Points[segment].Point, item.Points[nextIndex].Point);
percent = (float)(segment + partLen / allLen);
}
else
{
DrawModel.ArcModelMini arcModelMini = DrawingOperationHelper.GetArcParametersFromBulge(item.Points[segment].Point, item.Points[nextIndex].Point, (float)item.Points[segment].Bulge);
percent = segment + DrawingOperationHelper.GetPercentInArcByPoint(arcModelMini, unitPoint);
}
return((float)(DrawingOperationHelper.GetLengthByPositionInPolyLine(item.Points, item.IsCloseFigure, percent) / item.SizeLength));
}
