# Rebuild

[Rebuild] command rebuilds a spline, that is, changes the order(degree) and the number of control points. Depending on the input, some of the original shapes remain unchanged , and some do not.

## Step 1

For the prompt "Select a curve.", select a target curve.

- Pressing `K` key, changes the mode if the original shapes be maintained or not. When the original shape be kept unchanged, the curve tolerance is used to keep the updated curve be within tolerance from the original curve.

  When the original shape need not be unchanged, arbitrary degree and arbitrary number of control polygon can be specified.

## Step 2

For the prompt "Input parameters", input parameters from the dialogue box and press OK button to apply the input.

Order

  Specify the order(degree+1) of the rebuilt spline, which should be equal to or more tha 2.

Number of Conrol Points

  Specify the number of control points rebuilt, which should be equal to or more than the order input.