/// <summary>中心点を初期化する</summary>
public void InitCenterPosition()
{
//円の中心点を取得
_roundCenter = MathExtension.GetRoundCenter(this.StartPoint, this.EndPoint, this.Radius,
this.LineSweepDirection, this.IsLargeArc);
GetCenterPositen(_roundCenter);
}
/// <summary>位置をセット</summary>
public void SetPosition()
{
// 弧
this.lineElement.Point = this.EndPoint;
this.LinePathFigureElement.StartPoint = this.StartPoint;
this.lineElement.IsLargeArc = this.IsLargeArc;
this.lineElement.SweepDirection = this.LineSweepDirection;
this.lineElement.Size = new Size(this.Radius, this.Radius);
// 矢印
_roundCenter = new Point();
double k1;
//円の中心点を取得
try
{
_roundCenter = MathExtension.GetRoundCenter(this.StartPoint, this.EndPoint, this.Radius,
this.LineSweepDirection, this.IsLargeArc);
//円の中心点と矢印点の傾斜度
k1 = (_roundCenter.Y - this.EndPoint.Y) / (_roundCenter.X - this.EndPoint.X);
}
catch (Exception ex)
{
if (ex is RadiusException)
{
k1 = (-1) * (this.StartPoint.X - this.EndPoint.X) / (this.StartPoint.Y - this.EndPoint.Y);
this.lineElement.Size = new Size(0, 1);
}
else
{
return;
}
}
Point centerPoint1, centerPoint2, endPoint11, endPoint12, endPoint21, endPoint22;
//接線の傾斜度
double k2 = 0;
// Y軸方向
if (double.IsInfinity(k1))
{
//開始点と終了点の中点
this._CenterPoint.X = (this.StartPoint.X + this.EndPoint.X) / 2;
this._CenterPoint.Y = (this.StartPoint.Y + this.EndPoint.Y) / 2;
//Y軸方向の直線
if (this.IsBeeline)
{
if (this.StartPoint.X < this.EndPoint.X)
{
this.arrowStartElement.StartPoint = new Point(this.EndPoint.X - this.ArrowSize.Height,
this.EndPoint.Y - this.ArrowSize.Width);
this.arrowElement.Points.Clear();
this.arrowElement.Points.Add(this.EndPoint);
this.arrowElement.Points.Add(new Point(this.EndPoint.X - this.ArrowSize.Height,
this.EndPoint.Y + this.ArrowSize.Width));
}
else
{
this.arrowStartElement.StartPoint = new Point(this.EndPoint.X + this.ArrowSize.Height,
this.EndPoint.Y - this.ArrowSize.Width);
this.arrowElement.Points.Clear();
this.arrowElement.Points.Add(this.EndPoint);
this.arrowElement.Points.Add(new Point(this.EndPoint.X + this.ArrowSize.Height,
this.EndPoint.Y + this.ArrowSize.Width));
}
}
}
// X軸方向
else if (Math.Round(k1, 4) == 0)
{
//開始点と終了点の中点
this._CenterPoint.X = (this.StartPoint.X + this.EndPoint.X) / 2;
this._CenterPoint.Y = (this.StartPoint.Y + this.EndPoint.Y) / 2;
//X軸方向の直线
if (this.IsBeeline)
{
if (this.StartPoint.Y < this.EndPoint.Y)
{
this.arrowStartElement.StartPoint = new Point(this.EndPoint.X - this.ArrowSize.Width,
this.EndPoint.Y - this.ArrowSize.Height);
this.arrowElement.Points.Clear();
this.arrowElement.Points.Add(this.EndPoint);
this.arrowElement.Points.Add(new Point(this.EndPoint.X + this.ArrowSize.Width,
this.EndPoint.Y - this.ArrowSize.Height));
}
else
{
this.arrowStartElement.StartPoint = new Point(this.EndPoint.X - this.ArrowSize.Width,
this.EndPoint.Y + this.ArrowSize.Height);
this.arrowElement.Points.Clear();
this.arrowElement.Points.Add(this.EndPoint);
this.arrowElement.Points.Add(new Point(this.EndPoint.X + this.ArrowSize.Width,
this.EndPoint.Y + this.ArrowSize.Height));
}
}
}
else
{
k2 = (-1) / k1;
double xOffset = this.ArrowSize.Height / (Math.Sqrt(1 + k2 * k2));
double xTemp, yTemp;
// 一番目の点
xTemp = this.EndPoint.X + xOffset;
yTemp = k2 * (xTemp - this.EndPoint.X) + this.EndPoint.Y;
centerPoint1 = new Point(Math.Round(xTemp, 4), Math.Round(yTemp, 4));
// ニ番目の点
xTemp = this.EndPoint.X - xOffset;
yTemp = k2 * (xTemp - this.EndPoint.X) + this.EndPoint.Y;
centerPoint2 = new Point(Math.Round(xTemp, 4), Math.Round(yTemp, 4));
k2 = k1;
xOffset = this.ArrowSize.Width / (Math.Sqrt(1 + k2 * k2));
// 矢印の点
xTemp = centerPoint1.X + xOffset;
yTemp = k2 * (xTemp - centerPoint1.X) + centerPoint1.Y;
endPoint11 = new Point(Math.Round(xTemp, 4), Math.Round(yTemp, 4));
xTemp = centerPoint1.X - xOffset;
yTemp = k2 * (xTemp - centerPoint1.X) + centerPoint1.Y;
endPoint12 = new Point(Math.Round(xTemp, 4), Math.Round(yTemp, 4));
// 矢印の点
xTemp = centerPoint2.X + xOffset;
yTemp = k2 * (xTemp - centerPoint2.X) + centerPoint2.Y;
endPoint21 = new Point(Math.Round(xTemp, 4), Math.Round(yTemp, 4));
xTemp = centerPoint2.X - xOffset;
yTemp = k2 * (xTemp - centerPoint2.X) + centerPoint2.Y;
endPoint22 = new Point(Math.Round(xTemp, 4), Math.Round(yTemp, 4));
//小弧
if (!this.IsLargeArc)
{
#region 小弧
//直線の場合
if (this.IsBeeline)
{
double d1 = (endPoint11.X - this.StartPoint.X) * (endPoint11.X - this.StartPoint.X) + (endPoint11.Y - this.StartPoint.Y) * (endPoint11.Y - this.StartPoint.Y);
double d2 = (endPoint21.X - this.StartPoint.X) * (endPoint21.X - this.StartPoint.X) + (endPoint21.Y - this.StartPoint.Y) * (endPoint21.Y - this.StartPoint.Y);
if (d1 < d2)
{
this.arrowStartElement.StartPoint = endPoint11;
this.arrowElement.Points.Clear();
this.arrowElement.Points.Add(this.EndPoint);
this.arrowElement.Points.Add(endPoint12);
}
else
{
this.arrowStartElement.StartPoint = endPoint21;
this.arrowElement.Points.Clear();
this.arrowElement.Points.Add(this.EndPoint);
this.arrowElement.Points.Add(endPoint22);
}
}
else
{
//点の位置を判定
if (MathExtension.GetPointLeftOrRight(_roundCenter, this.EndPoint, this.StartPoint) ==
MathExtension.GetPointLeftOrRight(_roundCenter, this.EndPoint, centerPoint1))
{
this.arrowStartElement.StartPoint = endPoint11;
this.arrowElement.Points.Clear();
this.arrowElement.Points.Add(this.EndPoint);
this.arrowElement.Points.Add(endPoint12);
}
else
{
this.arrowStartElement.StartPoint = endPoint21;
this.arrowElement.Points.Clear();
this.arrowElement.Points.Add(this.EndPoint);
this.arrowElement.Points.Add(endPoint22);
}
}
#endregion
}
else
{
#region 大弧
//直線の場合
if (this.IsBeeline)
{
double d1 = (endPoint11.X - this.StartPoint.X) * (endPoint11.X - this.StartPoint.X) + (endPoint11.Y - this.StartPoint.Y) * (endPoint11.Y - this.StartPoint.Y);
double d2 = (endPoint21.X - this.StartPoint.X) * (endPoint21.X - this.StartPoint.X) + (endPoint21.Y - this.StartPoint.Y) * (endPoint21.Y - this.StartPoint.Y);
if (d1 < d2)
{
this.arrowStartElement.StartPoint = endPoint11;
this.arrowElement.Points.Clear();
this.arrowElement.Points.Add(this.EndPoint);
this.arrowElement.Points.Add(endPoint12);
}
else
{
this.arrowStartElement.StartPoint = endPoint21;
this.arrowElement.Points.Clear();
this.arrowElement.Points.Add(this.EndPoint);
this.arrowElement.Points.Add(endPoint22);
}
}
else
{
//点の位置を判定
if (MathExtension.GetPointLeftOrRight(_roundCenter, this.EndPoint, this.StartPoint) == (-1) * MathExtension.GetPointLeftOrRight(_roundCenter, this.EndPoint, centerPoint1))
{
this.arrowStartElement.StartPoint = endPoint11;
this.arrowElement.Points.Clear();
this.arrowElement.Points.Add(this.EndPoint);
this.arrowElement.Points.Add(endPoint12);
}
else
{
this.arrowStartElement.StartPoint = endPoint21;
this.arrowElement.Points.Clear();
this.arrowElement.Points.Add(this.EndPoint);
this.arrowElement.Points.Add(endPoint22);
}
}
#endregion
}
this.GetCenterPositen(_roundCenter);
}
}
