You can match a curve using the Match Curve command.
Select the curve you wish to match to another curve.
From the Edition section of the action bar, click Match Curve.
Select the second element (first reference element) for the match curve to
be joined to.
It can be:
A curve.
A point on curve with history.
A datum point on curve.
A 3D point.
A vertex.
The first curve is automatically modified so as to be connected to the
second element while taking the continuity type into account.
If a curve is selected as the second element, all continuities can
be applied (point, tangent, and curvature).
If a curve or a point on curve with history is selected as the
second element, point or curvature continuity can be applied.
If a datum point on a curve, a 3D point, or a vertex is selected as
the second element, point continuity will be applied.
The number displayed on the first curve (Nx)
corresponds to number of control points on that curve.
Match between a curve and another curve Match between a curve and a point on curve with history Match between a curve and a datum point on curve Match between a curve and a 3D point Match between a curve and a vertex
indicates that the element has one support.
indicates that the element has more than one support. Right-click the tag to display the available supports and select the one you want to use.
Optional:
Select a second reference element if both ends of the curve shall be
matched.
Two tags for each reference element are displayed near the matching curve
extremities. Only one reference element is current, meaning that you can
only manipulate the second extremity of the matching curve, while the
other extremity is fixed. To be able to select another reference element
to perform another match, you must click the corresponding tag.
Optional:
Perform a local undo to deselect the first reference element.
Select Project End Point to allow a linear
projection of the minimum distance between two curves by projecting the
initial curve onto the target curve.
Select Quick Analysis to enable a violation
diagnosis of the curve matching. The original degree is kept (it is no
longer automatically increased).
The following parameters are taken into account
between the two curves:
distance
continuity degree
curvature difference
Click OK.
If you select a frozen curve (a curve with a history) or a non-Nurbs curve as input, an automatic
conversion will be performed before the matching operation:
If an exact conversion is possible, a new Nurbs curve will replace
the input curve in order to perform the match. This new curve will
be added in the tree.
If there is a deviation or no exact conversion exists, the Converter Wizard dialog box appears allowing you to
define the approximation according to a tolerance using parameters
such as U, V orders, patch numbers, and deviation tolerance.
Modify the continuity type by clicking it (it is displayed
sequentially) or by selecting a type from the context menu.
Optional:
In order to reach the correct degree (0 or 180 degree) and percentage (0%),
do one of the following:
Modify the order of the curve, click the label (the value is
increased by one) or right-click and select a number.
Modify the continuity type, click the label (it is sequentially
displayed) or right-click and select a type.
Use the App Options
You can use the options in the App Options panel when
matching a curve.
Open the App Options panel.
Click Continuity and
right-click a continuity label to edit the continuity constraint.
You can choose from the point, tangency, or curvature continuity
type to be taken into account.
Click U, V orders to
display the numbers of control points.
Click Contact Points to
display the point handles and to move the points along the curve, thus
interactively redefining the connection location.
Click Tensions to
modify the tension by sliding the displayed value along the green
segment.
This segment represents the direction and limits of the match curve
tangent at its end-points.
Click OK in the Match Curve
dialog box.
Click Break Curve and select
the curve.
Select the side to be removed.
Click OK in the Break Options
dialog box.
A new split curve is created replacing the initial one.
The curve resulting from the match remains selected by default. If you
wish to perform analyses, make sure you select the other curve using
Ctrl.
Available capabilities from the App Options panel, and/or specified in Me > Preferences > App Preferences > 3D Modeling > Styling> FreeStyle Shape Design,
Generaltab, are:
.
indicates that the element has one support.
indicates that the element has more than one support. Right-click the tag to display the available supports and select the one you want to use.
and
right-click a continuity label to edit the continuity constraint.
to
display the numbers of control points.
to
display the point handles and to move the points along the curve, thus
interactively redefining the connection location.
to
modify the tension by sliding the displayed value along the green
segment.
and select
the curve.
