plt.title('B-Spline Curve Example') plt.show() 在上述代码中: bspline_basis函数用于根据给定的索引i、次数p、参数值u和节点向量knot_vector计算B样条基函数的值。它通过递归的方式按照B样条基函数的定义进行计算,先处理零次基函数的情况,然后根据递归公式计算更高次的基函数。 bspline_curve函数用于生成B样条...
Take the example of the convex hull 130 Chapter 8 B-Spline Curves Figure 8.6 The local convex hull property: top, quadratic; bottom, cubic. Figure 8.7 The local control property: changing one control point of a cubic B-spline curve has only a local effect. property: the curve is in the...
The curve is an open B-spline curve. In this case, we should be careful about one additional restriction. On a previous page we showed an example of basis function computation using knot vector U = { 0, 0.25, 0.5, 0.75, 1 }, where m = 4. If the basis functions are of degree 1...
Curve swCurveIn = null; SplineParamData swSplineParaData = default(SplineParamData); object varCtrlPoints = null; object varKnotPoints = null; bool boolStatus = false; int i = 0; swCurveIn = (Curve)swSketchSeg.GetCurve(); Debug.Print(""); Debug.Print("B-spline"); Debug.Print...
curve is [0,1], this closed interval is subdivided by points calledknots. Let these knots be 0 <=u0<=u1<= ... <=um<= 1. Then, pointsC(ui)'s subdivide the curve as shown in the figure below and, consequently, modifying the subdivision of [0,1] changes the shape of the curve...
Wolfram Language function: Modify a BSplineCurve object to have explicit settings for certain options. Complete documentation and usage examples. Download an example notebook or open in the cloud.
Example with B-spline curves fit to a 3D surface Finally, to construct an animation, the B-spline curves representing the input data are determined at each moment in time, and the evolution of the curve between time points will appear smooth if the temporal resolution is sufficiently high. Th...
OPEN CASCADE BSpline Curve Interpolation eryar@163.com Abstract.Global curve interpolation to point data is a way to construct curves. The paper focus on the interpolate algorithm in OPEN CASCADE, and give a simple example to demonstrate the usage of the GeomAPI_Interpolate class. ...
OPEN CASCADE BSpline Curve Interpolation eryar@163.com Abstract.Global curve interpolation to point data is a way to construct curves. The paper focus on the interpolate algorithm in OPEN CASCADE, and give a simple example to demonstrate the usage of the GeomAPI_Interpolate class. ...
Sometimes a closed curve is needed. For example, when a designer designs the configuration of a cam wheel, closed curves are constructed and the cam wheel surface model passing through all curves is built. If unsmoothness occurs on curves, the surface would lose smoothness as well. In this ...