曲线信息类

主要是缓存一层包围盒

1,存档曲线Curve
2,复合曲线CompositeCurve3d
3,单元曲线Curve3d
验证包围盒在这里:
https://www.cnblogs.com/JJBox/p/18677417

public class CurveInfo : DRect {
    public int RegionColor = 0; // 染色:斜区0,横区1,竖区2
    public MyGroup Group { get; }
    public ConcurrentBag<double> Paramss { get; }
    public Curve3d OriginalC3d { get; }

    public CurveInfo(Curve3d cc) {
        OriginalC3d = cc;
        _left = cc.OrthoBoundBlock.GetMinimumPoint().Y;
        _right = cc.OrthoBoundBlock.GetMaximumPoint().Y;
        _bottom = cc.OrthoBoundBlock.GetMinimumPoint().X;
        _top = cc.OrthoBoundBlock.GetMaximumPoint().X;
        Group = new(0);
        Paramss = new();
    }

    public CurveInfo(Curve curve) {
        var cc = curve.GetGeCurve();
        OriginalC3d = cc;
        _left = cc.OrthoBoundBlock.GetMinimumPoint().Y;
        _right = cc.OrthoBoundBlock.GetMaximumPoint().Y;
        _bottom = cc.OrthoBoundBlock.GetMinimumPoint().X;
        _top = cc.OrthoBoundBlock.GetMaximumPoint().X;
        Group = new(0);
        Paramss = new();
    }

    // 根据曲线参数打断
    public IEnumerable<CurveInfo> BreakCurves() {
        var array = Paramss.ToArray();
        Array.Sort(array);
        return GetSplitCurvesToInfo(array);
    }

    public IEnumerable<CurveInfo> GetSplitCurvesToInfo(double[] paramss) {
        Curve3d[] resultArray = null;
        GetSplitCurves(paramss, ref resultArray);
        return resultArray.Select(curve3d => new CurveInfo(curve3d));
    }

    // 断分,扫描线碰撞需要
    // 从后面往前打断
    // 打断之后只有两个成员,头不输出,用来继续打断.
    public void GetSplitCurves(double[] paramss, ref Curve3d[] resultArray) {
        int size = paramss.Length + 1;
#if NET80
        resultArray = stackalloc Curve3d[size];
#else
        resultArray = new Curve3d[size];
#endif
        Curve3d cur = OriginalC3d;
        for (int i = paramss.Length - 1; i >= 0; i--) {
            Curve3d[] cs = cur.GetSplitCurves(paramss[i]);
            resultArray[i + 1] = cs.Last();
            cur = cs.First();
        }
        resultArray[0] = cur;
    }

    // TODO 炸开失败要返回本体,这里炸开有这个功能吗?
    // 单元曲线:复合曲线炸开而来.
    static Interval _interval = new Interval(Tolerance.Global.EqualPoint);
    public Curve3d[] Explode() {
        return OriginalC3d.Explode(_interval);
    }
    public IEnumerable<CurveInfo> ExplodeToInfo() {
        return Explode().Select(curve3d => new CurveInfo(curve3d));
    }

    // 隐式转换
    public static implicit operator Curve3d(CurveInfo m) {
        return m.OriginalC3d;
    }
    public static implicit operator CompositeCurve3d(CurveInfo m) {
        return Curve.CreateFormGeCurve(m.OriginalC3d))
                .ToCompositeCurve3d();
    }
    public static implicit operator Curve(CurveInfo m) {
        return Curve.CreateFormGeCurve(m.OriginalC3d));
    }

    public bool HasPoint(Point3d pt) {
        return OriginalC3d.StartPoint.IsEqualTo(pt, Tolerance.Global)
            || OriginalC3d.EndPoint.IsEqualTo(pt, Tolerance.Global);
    }
    public bool HasTwoPoint(CurveInfo other) {
        return (OriginalC3d.StartPoint.IsEqualTo(other.OriginalC3d.StartPoint, Tolerance.Global)
            && OriginalC3d.EndPoint.IsEqualTo(other.OriginalC3d.EndPoint, Tolerance.Global))
            || (OriginalC3d.StartPoint.IsEqualTo(other.OriginalC3d.EndPoint, Tolerance.Global)
            && OriginalC3d.EndPoint.IsEqualTo(other.OriginalC3d.StartPoint, Tolerance.Global));
    }
}