/// <summary>>開始点、終了点、弧の半径、描画方向,大小弧によって返回円の中心点を取得</summary>
/// <param name="startPoint">開始点</param>
/// <param name="endPoint">終了点</param>
/// <param name="radius">半径</param>
/// <param name="sweepDirection">弧が描画される方向</param>
/// <param name="isLargeArc">True:大弧,False:小弧 </param>
/// <returns>円の中心点</returns>
public static Point GetRoundCenter(Point startPoint, Point endPoint, double radius,
SweepDirection sweepDirection, bool isLargeArc)
{
// 開始と終了点が同じの場合
if (startPoint == endPoint)
{
throw new BaseException(Consts.ERROR_JOBEDIT_007);
}
//開始点と終了点の長さ(※現在の実装方法が不可能)
double width = Math.Sqrt((startPoint.Y - endPoint.Y) * (startPoint.Y - endPoint.Y) +
(startPoint.X - endPoint.X) * (startPoint.X - endPoint.X));
if (width > radius * 2)
{
throw new RadiusException("");
}
//交差点
Point crossingPoint = new Point((startPoint.X + endPoint.X) / 2, (startPoint.Y + endPoint.Y) / 2);
//開始点と終了点の傾度
double k1 = (startPoint.Y - endPoint.Y) / (startPoint.X - endPoint.X);
//交差点と円の中心の傾度
double k2;
//交差点と円の中心の長さ
double distance;
distance = Math.Sqrt(radius * radius - (width * width) / 4);
//円の中心
Point roundCenterLeft = new Point();
Point roundCenterRight = new Point();
// 傾度が無限大の場合(開始点と終了点のＹ座標が同じ)
if (double.IsInfinity(k1))
{
roundCenterLeft = new Point(crossingPoint.X + distance, crossingPoint.Y);
roundCenterRight = new Point(crossingPoint.X - distance, crossingPoint.Y);
}
// 傾度が0の場合(開始点と終了点のＸ座標が同じ)
else if (k1 == 0)
{
roundCenterLeft = new Point(crossingPoint.X, crossingPoint.Y + distance);
roundCenterRight = new Point(crossingPoint.X, crossingPoint.Y - distance);
}
// その他の場合
else
{
k2 = (-1) / k1;
double xOffset = distance / (Math.Sqrt(1 + k2 * k2));
double xTemp, yTemp;
#region 一番目の円の中心点
xTemp = crossingPoint.X + xOffset;
yTemp = k2 * (xTemp - crossingPoint.X) + crossingPoint.Y;
roundCenterLeft = new Point(Math.Round(xTemp, 4), Math.Round(yTemp, 4));
#endregion
#region ニ番目の円の中心点
xTemp = crossingPoint.X - xOffset;
yTemp = k2 * (xTemp - crossingPoint.X) + crossingPoint.Y;
roundCenterRight = new Point(Math.Round(xTemp, 4), Math.Round(yTemp, 4));
#endregion
}
if (-1 == MathExtension.GetPointLeftOrRight(startPoint, endPoint, roundCenterLeft))
{
Point pointTemp = roundCenterLeft;
roundCenterLeft = roundCenterRight;
roundCenterRight = pointTemp;
}
//大弧
if (isLargeArc)
{
//時計回り (正の角) 、 右の円の中心を取得
if (sweepDirection == SweepDirection.Clockwise)
{
return(roundCenterRight);
}
// 反時計回り (負の角) 、 左の円の中心を取得
else
{
return(roundCenterLeft);
}
}
//小弧
else
{
//時計回り (正の角) 、 左の円の中心を取得
if (sweepDirection == SweepDirection.Clockwise)
{
return(roundCenterLeft);
}
// 反時計回り (負の角) 、 右の円の中心を取得
else
{
return(roundCenterRight);
}
}
}
/// <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);
}
}