Public 成员函数 继承自 详细描述
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二维曲线的几何参数表达，用来获取曲线上点、切线等信息。
构造及析构函数说明
◆ ParametricCurve2d()
| ParametricCurve2d.ParametricCurve2d | ( | TopoShape | edge | ) |
使用2D边拓扑对象构造和初始化
- 参数
-
edge 边
成员函数说明
◆ ComputeLength()
| double ParametricCurve2d.ComputeLength | ( | double | u1, |
| double | u2 | ||
| ) |
计算指定区间的长度
- 参数
-
u1 起始参数
u2 终止参数
- 返回
- 长度
◆ ComputePointByDistance()
| double ParametricCurve2d.ComputePointByDistance | ( | double | u0, |
| double | offset | ||
| ) |
Compute the point with the distance to u0.
- 参数
-
u0 the parameter of the start point.
offset the distance.
- 返回
- the parameter of the point. retun u0 if not found.
◆ Continuity()
| int ParametricCurve2d.Continuity | ( | ) |
Continuity.
enum:
C0 = 0,
G1,
C1,
G2,
C2,
C3,
CN
◆ D0()
| GPnt2d ParametricCurve2d.D0 | ( | double | u | ) |
Computes the point of parameter U on the curve.
- 参数
-
u the parameter
- 返回
- the point.
◆ D1()
| DerivativeValues2d ParametricCurve2d.D1 | ( | double | u | ) |
Computes the point and derivative of parameter U on the curve.
- 参数
-
u the parameter
- 返回
- the point and the first derivative. Empty if not C1
◆ D2()
| DerivativeValues2d ParametricCurve2d.D2 | ( | double | u | ) |
Computes the point and derivative of parameter U on the curve.
- 参数
-
u the parameter
- 返回
- the point, the first and second derivative. Empty if not C2.
◆ D3()
| DerivativeValues2d ParametricCurve2d.D3 | ( | double | u | ) |
Computes the point and derivative of parameter U on the curve.
- 参数
-
u the parameter
- 返回
- the point, the first, the second and the third derivative. Empty if not C3.
◆ DN()
| GVec2d ParametricCurve2d.DN | ( | double | u, |
| int | n | ||
| ) |
The returned vector gives the value of the derivative for the order of derivation N.
- 参数
-
u the parameter
n the order of derivation
- 返回
- the vector. Return zero if not CN or N < 1.
◆ FirstParameter()
| double ParametricCurve2d.FirstParameter | ( | ) |
起点参数
- 返回
- 参数
◆ GetBBox()
| GBBox ParametricCurve2d.GetBBox | ( | ) |
Compute the bounding box.
- 返回
- the box.
◆ GetCurveType()
| EnumCurveType ParametricCurve2d.GetCurveType | ( | ) |
Get the curve type.
enum EnumCurveType
- 返回
- the point.
◆ GetEndPoint()
| GPnt2d ParametricCurve2d.GetEndPoint | ( | ) |
获取终点坐标.
- 返回
- the end point.
◆ GetLength()
| double ParametricCurve2d.GetLength | ( | ) |
计算长度
- 返回
- 长度
◆ GetStartPoint()
| GPnt2d ParametricCurve2d.GetStartPoint | ( | ) |
获取起始点坐标.
- 返回
- the start point.
◆ Initialize()
| boolean ParametricCurve2d.Initialize | ( | TopoShape | edge | ) |
◆ Is3DCurve()
| boolean ParametricCurve2d.Is3DCurve | ( | ) |
Is 3D Curve.
◆ IsClosed()
| boolean ParametricCurve2d.IsClosed | ( | ) |
Is Closed.
◆ IsPeriodic()
| boolean ParametricCurve2d.IsPeriodic | ( | ) |
Is Periodic.
◆ IsValidGeometry()
| boolean ParametricCurve2d.IsValidGeometry | ( | ) |
Test if valid.
重载 ParametricGeometry .
◆ LastParameter()
| double ParametricCurve2d.LastParameter | ( | ) |
终点参数
- 返回
- 参数
◆ Normal()
| GVec2d ParametricCurve2d.Normal | ( | double | u | ) |
计算法向的值
- 参数
-
u 参数
- 返回
- 法向
◆ Period()
| double ParametricCurve2d.Period | ( | ) |
The period.
◆ SplitByUniformLength()
| DoubleList ParametricCurve2d.SplitByUniformLength | ( | double | length, |
| double | tolerance | ||
| ) |
拆分为等长度的线段.
- 参数
-
length the length of each part.
tolerance 误差
- 返回
- the parameters of each part.
◆ TryCircle()
| GCirc2d ParametricCurve2d.TryCircle | ( | ) |
转换为圆弧对象
- 返回
- 对象
◆ TryEllipse()
| GElips2d ParametricCurve2d.TryEllipse | ( | ) |
转换为椭圆弧对象
- 返回
- 对象
◆ TryHyperbola()
| GHypr2d ParametricCurve2d.TryHyperbola | ( | ) |
转换为双曲线对象
- 返回
- 对象
◆ TryLine()
| GLin2d ParametricCurve2d.TryLine | ( | ) |
转换为直线对象
- 返回
- 对象
◆ TryParabola()
| GParab2d ParametricCurve2d.TryParabola | ( | ) |
转换为抛物线对象
- 返回
- 对象
◆ Value()
| GPnt2d ParametricCurve2d.Value | ( | double | u | ) |
计算点的值.
- 参数
-
u the parameter
- 返回
- the point.
