/// <summary>
/// 创建正多边形的顶点数组。
/// </summary>
/// <param name="pivot">正多边形的几何中心坐标。</param>
/// <param name="outterRadius">多边形的外接圆半径。</param>
/// <param name="points">多边形的边数。</param>
/// <param name="angleOffset">X轴顶角坐标偏移度数。</param>
/// <returns>正多边形的顶点数组。</returns>
public static PointF[] CreateRegularPolygon(PointF pivot, float outterRadius, int points, float angleOffset)
{
if (outterRadius < 0)
{
throw new ArgumentOutOfRangeException("outterRadius", "多边形的外接圆半径必须大于0");
}
if (points < 3)
{
throw new ArgumentOutOfRangeException("points", "多边形的边数必须大于等于3");
}
PointF[] ret = new PointF[points];
CircleF c = new CircleF(pivot, outterRadius);
float ang = 360.0f / points;
for (int i = 0; i < points; i++)
{
ret[i] = c.PointOnPath(angleOffset + i * ang);
}
return(ret);
}
/// <summary>
/// 创建一个几何规则的星形
/// </summary>
/// <param name="pivot">星形的几何中心坐标</param>
/// <param name="outterRadius">星形的外环半径</param>
/// <param name="innerRadius">星形的内环半径</param>
/// <param name="points">星形的顶角数</param>
/// <param name="angleOffset">X轴顶角坐标偏移度数。</param>
/// <returns>星形的GraphicsPath对象</returns>
public static GraphicsPath CreateStar(PointF pivot, float outterRadius, float innerRadius, int points, float angleOffset)
{
if (outterRadius <= innerRadius)
{
throw new ArgumentException("参数outterRadius必须大于innerRadius。");
}
if (points < 2)
{
throw new ArgumentOutOfRangeException("points");
}
GraphicsPath gp = new GraphicsPath();
CircleF outter = new CircleF(pivot, outterRadius);
CircleF inner = new CircleF(pivot, innerRadius);
float ang = 360.0f / points;
for (int i = 0; i < points; i++)
{
gp.AddLine(outter.PointOnPath(angleOffset + i * ang), inner.PointOnPath(angleOffset + i * ang + ang / 2.0f));
}
gp.CloseFigure();
return(gp);
}
protected override void OnSizeChanged(EventArgs e)
{
base.OnSizeChanged(e);
CircleF c = new CircleF(ClientRectangle);
c.Inflate(-5.0f);
_innerRadius = c.Radius / 2.0f;
_spokes = ExtendedShapes.CreateWaitCircleSpokes(c.Pivot, c.Radius, _innerRadius, _numberofspokes);
}
/// <summary>
/// 创建进度圆环的各个叶瓣的轮廓线
/// </summary>
/// <param name="pivot">进度圆环的几何中心坐标</param>
/// <param name="outterRadius">进度圆环的外边界半径</param>
/// <param name="innerRadius">进度圆环的内边界半径</param>
/// <param name="spokes">进度圆环的叶瓣数量</param>
/// <param name="angleOffset">X轴顶角坐标偏移度数</param>
/// <returns>组成进度圆环的各个叶瓣的轮廓线坐标链表</returns>
public static List<PointF[]> CreateWaitCircleSpokes(PointF pivot, float outterRadius, float innerRadius, int spokes, float angleOffset)
{
if (spokes < 1) throw new ArgumentException("参数spokes必须大于等于1。");
List<PointF[]> lst = new List<PointF[]>();
CircleF outter = new CircleF(pivot, outterRadius);
CircleF inner = new CircleF(pivot, innerRadius);
float ang = 360.0f / spokes;
for (int i = 0; i < spokes; i++)
{
lst.Add(new PointF[2] { outter.PointOnPath(angleOffset + i * ang), inner.PointOnPath(angleOffset + i * ang) });
}
return lst;
}
/// <summary>
/// 创建一个几何规则的星形
/// </summary>
/// <param name="pivot">星形的几何中心坐标</param>
/// <param name="outterRadius">星形的外环半径</param>
/// <param name="innerRadius">星形的内环半径</param>
/// <param name="points">星形的顶角数</param>
/// <param name="angleOffset">X轴顶角坐标偏移度数。</param>
/// <returns>星形的GraphicsPath对象</returns>
public static GraphicsPath CreateStar(PointF pivot, float outterRadius, float innerRadius, int points, float angleOffset)
{
if (outterRadius <= innerRadius) throw new ArgumentException("参数outterRadius必须大于innerRadius。");
if (points < 2) throw new ArgumentOutOfRangeException("points");
GraphicsPath gp = new GraphicsPath();
CircleF outter = new CircleF(pivot, outterRadius);
CircleF inner = new CircleF(pivot, innerRadius);
float ang = 360.0f / points;
for (int i = 0; i < points; i++)
{
gp.AddLine(outter.PointOnPath(angleOffset + i * ang), inner.PointOnPath(angleOffset + i * ang + ang / 2.0f));
}
gp.CloseFigure();
return gp;
}
/// <summary>
/// 创建正多边形的顶点数组。
/// </summary>
/// <param name="pivot">正多边形的几何中心坐标。</param>
/// <param name="outterRadius">多边形的外接圆半径。</param>
/// <param name="points">多边形的边数。</param>
/// <param name="angleOffset">X轴顶角坐标偏移度数。</param>
/// <returns>正多边形的顶点数组。</returns>
public static PointF[] CreateRegularPolygon(PointF pivot, float outterRadius, int points, float angleOffset)
{
if (outterRadius < 0) throw new ArgumentOutOfRangeException("outterRadius", "多边形的外接圆半径必须大于0");
if (points < 3) throw new ArgumentOutOfRangeException("points", "多边形的边数必须大于等于3");
PointF[] ret = new PointF[points];
CircleF c = new CircleF(pivot, outterRadius);
float ang = 360.0f / points;
for (int i = 0; i < points; i++)
{
ret[i] = c.PointOnPath(angleOffset + i * ang);
}
return ret;
}
/// <summary>
/// Calculate the distance of the piviot
/// </summary>
public float Distance(CircleF c)
{
return Distance(c.Pivot);
}
/// <summary>
/// Calculate the distance of the piviot
/// </summary>
public float Distance(CircleF c)
{
return(Distance(c.Pivot));
}
