/// <summary>
/// 通过开始点和结束点创建半圆弧片段
/// </summary>
/// <param name="fromPoint">开始点</param>
/// <param name="toPoint">结束点</param>
/// <returns>半圆弧片段</returns>
public static ISegment CreateHalfCircularArcByTwoPoints(IPoint fromPoint, IPoint toPoint)
{
ILine line = CreateLineByTwoPoints(fromPoint, toPoint);
ILine normal = new Line();
line.QueryNormal(esriSegmentExtension.esriNoExtension, 0.5, true, (double)(line.Length / 2.0), normal);
IConstructCircularArc Constructor = new CircularArc() as IConstructCircularArc;
Constructor.ConstructThreePoints(fromPoint, normal.ToPoint, toPoint, true);
return((ISegment)Constructor);
}
private ICircularArc method_1(IPoint ipoint_1, IPoint ipoint_2, IPoint ipoint_3)
{
ICircularArc circularArc;
try
{
IConstructCircularArc circularArcClass = new CircularArc() as IConstructCircularArc;
circularArcClass.ConstructThreePoints(ipoint_1, ipoint_3, ipoint_2, false);
circularArc = circularArcClass as ICircularArc;
}
catch (Exception exception)
{
exception.ToString();
ICircularArc circularArcClass1 = new CircularArc()
{
FromPoint = ipoint_1,
ToPoint = ipoint_2
};
circularArc = circularArcClass1;
}
return(circularArc);
}