Summary

Changes the shape of a Wire, 1D Member object into a desired shape.

How to Run

Ribbon Menu > [Edit] Tab > [Edit Edge] Group > Fit Curve

Explanation

Fit Curve Feature

This feature converts selected objects into curves of similar shape.

[Selection Filter]
Select the type of target object to select. When a Wire is selected, the filter is enabled so that only Wires can be selected.
[Select Target]
Select the target objects to change shape.

Wire : Select the Wire Body as the target object.

1D Member : Select the 1D Member as the target object.

[Curve Target]
Sets the shape to which the target object will transform into.

Arc : The target object transforms into an arc shape.

Ellipse : The target object transforms into an elliptical shape.

Spline(Interpolation) : The target object transforms into an interpolated spline shape.

Spline(Control Point) : The target object transforms into a control point of a spline.

Polynomial : The target object transforms into a polynomial shape. The example is the result of a parabolid (secondary) polynomial.

[Select Edge for End Continuity]
This option appears when the Curve Type is set to Spline (Interpolation). If the Fit Curve feature is applied to only a portion of the entire line, the point where the changed section and the unchanged section meet is smoothened out (continuous slope).

The example below shows the case where two lines in the center are selected as target members and the spare lines on left and right are selected/not selected as targets for Edge for End Continuity.

Not selected as targets for Edge for End Continuity.

Selected as targets for Edge for End Continuity. The slope at the connection point becomes continuous.

[Order / Define Axis]
This option appears when Polynomial is selected as the Curve Type.
- Order : Sets the order of the polynomial to be created.
- Sets the direction of the X-axis to be used when creating the polynomials. When the Auto Axis option is turned on, select the axis that makes the sum of the residuals (squares of Residual) the smallest to be the X-axis. This can be manually entered if this option is turned Off.
[Segmentation]
Sets the method of applying the Fit Curve feature when multiple objects are selected.
- By Select : Considers all selected target objects as a single polyline and applies the Fit Curve to that polyline. If two continuous polylines are selected as target objects, the two polylines are considered as a single polyline and the Fit Curve is applied.
- By Body : The Fit Curve feature is applied to each of the selected target objects. If two continuous polylines are selected as target objects, the Fit Curve is applied to each polyline individually.
- By Angle : This method applied the same way as the By Select method. A edge angle filter can be used to apply the feature only when the angle is within the angle set by the filter.

The example above shows the case where a 45 degree is set after selecting the By Angle method. All the lines above the long line that passes through the origin were converted to arcs successfully. On the other hand, the long line that passes through the origin with an angle less than 45 deg (smaller angle) was excluded from being changed into an arc. (The angle uses the angle between the direction vector of the previous line and the direction vector of the subsequent line.)

[Option]
- Fix End Vertices : If set to On, set the object created after Fitting to pass through the start and end points of the target object.
- Merge Target : If set to On, set the object created after Fitting becomes a polyline with multiple edges.

If set to On:

If set to Off:

Manual (MIDAS CIM)

Fit Curve⁯

Summary

How to Run

Explanation

Fit Curve Feature

Reference Materials

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