SoCenterballDragger

InventorModule

genre	InventorDraggers
author	Silicon Graphics Inc
package	MeVisLab/Standard
definition	inventor.def

Purpose

A striped ball you rotate and re-center by dragging with the mouse. SoCenterballDragger is a composite dragger. Its shape is a sphere defined by three intersecting circles. Where the circles intersect (at the ends of the x, y and z axes) there are sets of small green crosshairs. Dragging a pair of crosshairs translates the entire centerball within the plane of the crosshairs. The interface of the sphere and circles is just like SoTrackballDragger. Dragging a circle rotates about a constrained axis and dragging the areas between them rotates the sphere freely about the center. An invisible but pickable sphere initiates the free-rotation dragging.

When you drag the crosshairs, the center field is updated; there is no translation field. Dragging other parts of the centerball updates the rotation field. As with all draggers, if you change the fields the dragger moves in response.

Windows

Default Panel

Output Fields

self

name: self, type: SoNode

Parameter Fields

Visible Fields

Is Active

name: isActive, type: Bool, persistent: no

TRUE when mouse is down and dragging, else FALSE.

Rotation

name: rotation, type: Rotation, default: 0 0 1 0

Orientation of the dragger. Three lines along the x, y, and z axes form the central star shape, which you can drag with the mouse to rotate the dragger.

Center

name: center, type: Vector3, default: 0 0 0

Center of rotation and scale of the dragger.

Hidden Fields

enable

name: enable, type: Bool, default: TRUE