Editor: Curve Editor ()

Description:

This editor allows you to create and modify a B-Spline.

The curve is defined by a set of control points. The control points can be appended or modified by moving a dragger, by clicking on an object in the viewer with the middle mouse button, or by entering numerical values into the port Control Points.

Connections:

Module [optional]
An Ortho Slice used by Auto-trace editing mode.

Ports:

Degree

Enter the degree of the B-Spline. The higher the degree, the more control points are required and the smoother the curve. Also, the oscillations increase when the degree increases.

Samples

Enter the number of samples.

Mode

In interpolation mode, the curve goes through the specified points. In approximation mode, the curve approximates the polygon spanned by the points.

Editing Mode

The dragger either appends or insert new points or modifies the currently selected point. Those modes apply as well when clicking on an object in the viewer with the middle mouse button.

As a last editing mode, Auto-trace insert a set of points based on a path extracted from the underlying image (see Ortho Slice. The path is computed by finding the shortest path between the previous point and the newly added one, following image's gradients.

Points

Specifies the control points that define the curve. The points can be modified by entering numerical values here, by moving the dragger and clicking on the middle mouse button, or by doing a click on an object in the viewer with the middle mouse button. In the Options menu, the dragger and the control points can be switched on and off in the display. Furthermore, the Interactive Feedback can be activated to see a preview of the future curve before appending a new point.

Point Size

Specifies the size of points.

Display

Specifies the display mode. These options are not mutualy exclusive. Checking off the 'points' will display points of the B-Spline and checking off the 'lines' will display lines between the points.

Curve

Resets the curve to its original shape by removing changes made to it with the Curve Editor