public static void TestOpenCurve(string unparsed)
{
var dgnModel = Session.Instance.GetActiveDgnModel();
var uor = dgnModel.GetModelInfo().UorPerMeter;
List <DPoint3d> pnts = new List <DPoint3d>();
List <double> degrees = new List <double>()
{
0, 45, 90, 135, 180, 225, 270
};
foreach (var degree in degrees)
{
pnts.Add(new DPoint3d()
{
X = Angle.FromDegrees(degree).Cos *uor,
Y = Angle.FromDegrees(degree).Sin *uor,
Z = 0,
});
}
// 节点 = 控制点+阶数
List <double> knots = new List <double>()
{
1, 1, 1, 1, 1, 1, 1, 1, 1, 1
};
var bspline = BsplineCurve.CreateFromPoles(pnts, knots, 3, false);
DraftingElementSchema.ToElement(dgnModel, bspline, null)?.AddToModel();
}
public static void TestClosedBspine(string unparsed)
{
var dgnModel = Session.Instance.GetActiveDgnModel();
var uor = dgnModel.GetModelInfo().UorPerMeter;
List <DPoint3d> pnts = new List <DPoint3d>();
List <double> degrees = new List <double>()
{
0, 45, 90, 135, 180, 225, 270 // 7 个
};
foreach (var degree in degrees)
{
DPoint3d pnt = new DPoint3d()
{
X = Angle.FromDegrees(degree).Cos *uor,
Y = Angle.FromDegrees(degree).Sin *uor,
Z = 0,
};
pnts.Add(pnt);
}
// 节点 = 控制点+2*阶数-1
List <double> knots = new List <double>()
{
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1, 2, 3
};
var bspline = BsplineCurve.CreateFromPoles(pnts, knots, 4, true);
var bknots = bspline.Knots();
DraftingElementSchema.ToElement(dgnModel, bspline, null)?.AddToModel();
}
public static void TestBspineThroughPnts(string unparsed)
{
var dgnModel = Session.Instance.GetActiveDgnModel();
var uor = dgnModel.GetModelInfo().UorPerMeter;
List <DPoint3d> pnts = new List <DPoint3d>();
List <double> degrees = new List <double>()
{
0, 45, 90, 135, 180, 225, 270 // 7 个
};
foreach (var degree in degrees)
{
DPoint3d pnt = new DPoint3d()
{
X = Angle.FromDegrees(degree).Cos *uor,
Y = Angle.FromDegrees(degree).Sin *uor,
Z = 0,
};
// 重复 k 次
pnts.Add(pnt);
pnts.Add(pnt);
pnts.Add(pnt);
}
// 节点 = 控制点+阶数
List <double> knots = new List <double>()
{
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
};
var bspline = BsplineCurve.CreateFromPoles(pnts, knots, 3, false);
DraftingElementSchema.ToElement(dgnModel, bspline, null)?.AddToModel();
}
public static void TestBsplineContainsLine(string unparsed)
{
var dgnModel = Session.Instance.GetActiveDgnModel();
var uor = dgnModel.GetModelInfo().UorPerMeter;
List <DPoint3d> pnts = new List <DPoint3d>();
List <double> degrees = new List <double>()
{
0, 45, 90, 135, 180, 225, 270 // 7 个点
};
foreach (var degree in degrees)
{
pnts.Add(new DPoint3d()
{
X = Angle.FromDegrees(degree).Cos *uor,
Y = Angle.FromDegrees(degree).Sin *uor,
Z = 0,
});
}
// 3 阶，则要求有 3 个点共线
var startPnt = pnts[2];
var linePnt2 = startPnt - DVector3d.UnitX * uor;
var linePnt3 = linePnt2 - DVector3d.UnitX * uor;
// 仅三点共线
List <DPoint3d> pntsTemp1 = new List <DPoint3d>()
{
pnts[0], pnts[1], startPnt, linePnt2, linePnt3
};
List <DPoint3d> pntsTemp2 = new List <DPoint3d>()
{
pnts[0], pnts[1], startPnt, startPnt, linePnt2, linePnt3, linePnt3
};
// 将其它点平移
for (int i = 3; i < pnts.Count; i++)
{
pntsTemp1.Add(pnts[i] - DPoint3d.UnitX * 2 * uor);
pntsTemp2.Add(pnts[i] - DPoint3d.UnitX * 2 * uor);
}
// 节点 = 控制点+阶数
List <double> knots1 = new List <double>()
{
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
};
List <double> knots2 = new List <double>()
{
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
};
var bspline1 = BsplineCurve.CreateFromPoles(pntsTemp1, knots1, 3, false);
DraftingElementSchema.ToElement(dgnModel, bspline1, null)?.AddToModel();
// 对第二条曲线平移下
var bspline2 = BsplineCurve.CreateFromPoles(pntsTemp2, knots2, 3, false);
DTransform3d trans = DTransform3d.FromTranslation(DVector3d.UnitX * 5 * uor);
bspline2.Transform(trans);
DraftingElementSchema.ToElement(dgnModel, bspline2, null)?.AddToModel();
}