Transform Curve

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Select NURBS object. > Modify panel > Create Curves rollout > Dependent Curves group box > Transform button

Select NURBS object. > Modify panel > NURBS toolbox > Create Transform Curve button

A transform curve is a copy of the original curve with a different position, rotation, or scale.

Curve used to create a transform curve

Procedure

To create a transform curve:

In a NURBS object that contains at least one curve, turn on Transform.

To move the transform curve, click and drag the curve you want to duplicate. To rotate or scale the transform curve, click the parent curve, click to turn on Sub-Object on the Modifier Stack rollout, choose Curve from the drop-down list, and then use a transform to rotate or scale the transform curve.

When you use Move to create the transform curve, it simply copies the parent. (It doesn't exaggerate curvature as an offset curve does.)

Axis constraints don't apply to the creation of transform curves. You can click to create the curve in place; then once it is created, transform it using constraints.

Tip: You can also use axis constraints by using Shift+clone at the Curve sub-object level.

Interface

Creation time

At creation time, transform curves have no parameters.

Transform Curve rollout (modification time)

At modification time, you can transform the transform curve as a curve sub-object. Transform curves also have one control in the Modify panel.

Replace Base Curve—Lets you replace the parent curve. Click the button, then click the curve to replace the original curve.