3.2.1   Edition mode

When clicking onto an option, edition options will pop up and the element will stay highlighted. To exit edition mode, select the *none* option or press Esc. Changes are saved once those take place.

To remove an element, you must access its edition mode.

Numeral inputs allow keyboard input, although it is restricted to valid values and a 1-decimal precision by default.

3.2.2   Editing an Isotropic Region

The editable elements in a region concern:

• Its name
• Its color
• Its radius
• Its position (x y z)

Name and color are editable from the title fields. Click to the square representing the color for deploying color editing interface.

Drag and Drop interactive controls for editing the position of the isotropic region can be deployed by clicking the button under the position fields. When drag and drop controls are active it stays yellow (as shown in the picture) and it can be turned off at any moment by clicking over again.

3.2.3   Editing a Fiber

When entering fiber edition mode, its structure will feature in the scene.

The editable elements in a fiber concern:

• Its name
• Its color
• Its radius
• Its tangent-computing mode:
  • Symmetric
  • Incoming
  • Outgoing

Name and color are editable from the title fields. Click to the square representing the color for deploying color editing interface.

A selection list for the fibers' control points is available at the bottom. Hovering those will also highglight them in the scene to help identifying.

3.2.4   Editing a Control Point

Clicking over a control point in the list will pop up control point edition mode.

Only position may be edited.

While editing and navigating through control points, those may adopt four different colors in the scene:

• Yellow: Control points the user is not interacting with.
• Blue: For the control point being hovered in selection list.
• Red: Currently being edited control point.
• Green: Position changed control point that may be saved.

A control point is saved whenever its edition is quitted. When position was changed, the former version is on the scene in red color while the one to be saved is in green. The former may be recovered by pressing the Undo button, marked with an arrow.

Position may be edited manually by using the given fields. As well, by clicking on the Drag and Drop button, marked with a pointer. This option will allow an interactive edition in the scene itself.

The interactive edition allows different liberty grades:

• Axes, by using the arrows shown.
• Planes, by dragging the planes formed between the arrows.
• The screen plane, by clicking directly on the point.

New CP button creates a new control point. It is to be placed in the mid-point between the current and the next one. Remove CP removes the current control point after asking for confirmation.

Remove CP option is not available in first and last control points.