/// <summary>
///
/// </summary>
/// <param name="mat"></param>
public override void TransformBy(Matrix2D mat)
{
var pt0 = GetPointAtParam(StartParam);
var pt1 = GetPointAtParam((StartParam + EndParam) / 2);
var pt2 = GetPointAtParam(EndParam);
pt0 *= mat;
pt1 *= mat;
pt2 *= mat;
var vec = MinorAxis * mat;
Minor = vec.Length;
vec = MajorAxis * mat;
Major = vec.Length;
Center *= mat;
Rotation = vec.Angle;
var vec0 = pt0 - Center;
var vec2 = pt2 - Center;
StartAngle = vec0.Angle - Rotation;
EndAngle = vec2.Angle - Rotation;
IsClockWise = Vector2D.IsClockWise(vec0, pt1 - Center, vec2);
}
public Vector2D Mirror(Vector2D vec)
{
return(TransformBy(Matrix2D.Mirror(vec)));
}
/// <summary>
/// 获取旋转后的向量
/// </summary>
/// <param name="angle"></param>
/// <returns></returns>
public Vector2D RotateBy(Angle angle)
{
return(TransformBy(Matrix2D.Rotation(angle)));
}
public abstract void TransformBy(Matrix2D mat);
public override void TransformBy(Matrix2D mat)
{
StartPoint *= mat;
EndPoint *= mat;
}
/// <summary>
/// 按直线的镜像矩阵
/// </summary>
/// <param name="start"></param>
/// <param name="end"></param>
/// <returns></returns>
public static Matrix2D Mirror(Point2D start, Point2D end)
{
return(Matrix2D.Mirror(start, end - start));
}
/// <summary>
///
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public static Matrix2D Mirror(LineSegment2D line)
{
return(Matrix2D.Mirror(line.StartPoint, line.EndPoint));
}
