Combines a selected spline with other splines, lines, polylines, and arcs at coincident endpoints to form a larger spline. Objects are joined with kinks at the points where they are joined C0 continuity. Edits fit point data using the following options:. After selecting a fit point, specify a new fit point to be added to the spline in the direction of the next fit point, which is automatically highlighted. If you select the last fit point on an open spline, the new fit point is added to the end of the spline.
If you select the first fit point on an open spline, you have the option of specifying whether the new fit point is added before or after the first point. Refits the spline to the existing fit points using the new tolerance value.
Edits control frame data using the following options:. The maximum value is Relocates a selected control vertex. Converts the spline to a polyline. The precision value determines how closely the resulting polyline matches the spline. The tolerance of the control points. The degree of the polynomial used to form the spline.
The degree of the spline. A vector representing the end tangent for fit point type splines. The tolerance of fit points.
The flag that indicates the type of spline. Range: chord sqrtchord uniform custom. The tolerance of the spline knots. Note that the resulting spline does not pass through any of the control vertices. Expand the Draw panel and click the Spline Fit button. When creating a spline using the Fit method, the shape of the curve is controlled by knots and there are three different knot parameterizations.
To change the knot parameterization, right-click and choose the Knot option. When this is set to Chord , the program numbers edit points using decimal values representing their location on the curve.
When it is set to Square Root , the program numbers edit points based on the square root of the chordal length between consecutive knots.
And when it is set to Uniform , the program numbers edit points with consecutive integers. Choose the Chord option and then begin specifying points by using the node object snap to snap to the point objects.
When using the Fit method, you can also control the start tangency, end tangency, and tolerance. The tangency settings enable you to control the tangent direction.
The tolerance value lets you specify how close the spline must pass to the fit points, and is applied to all fit points except for the start and end points of the spline. In this case, simply create the spline using the default values. Repeat these steps, but this time, right-click, choose the Tolerance option, and specify a tolerance of 1. Note that you can specify a different tolerance value for each fit point. This time, the spline passes through the first and last points and within 1 unit of the other points.
Specifies a tangent condition on the starting point of the spline. Specifies a tangent condition on the ending point of the spline.
Specifies the distance by which the spline is allowed to deviate from the specified fit points. A tolerance value of 0 requires the resulting spline to pass directly through the fit points. The tolerance value applies to all fit points except the starting and ending fit points, which always have a tolerance of 0. The following prompt is specific to the control vertices CV method.
Sets the polynomial degree of the resulting spline. Use this option to create splines of degree 1 linear , degree 2 quadratic , degree 3 cubic , and so on up to degree
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