visual_object

Introduction

All objects in the 3D scene are objects, with fixed or dynamic position. An visual_object can be positioned in latitude, longitude and altitude, as well in rotations along all three axis. By assigning a 3D modell to an visual_object, the Model is visible in the scene and can be freely positioned.

Basically, a visual_object is a simple Matrixtransform which has the geometry as childnode.

visual_object provides the following convenience variables / functions for simple usage of objects in osgVisual:

• positioning in lat, lon, alt (position)
• rotating along all 3 object axis (attitude)
• scaling along all 3 axis
• loading/unloading 3D geometry
• setting geometry offset, if 3D model has wrong axis orientation
• camera translation offset (on node attached camera manipulator)
• camera attitude offset (on node attached camera manipulator)
• adding/removing object_updater
• setting/clearing label (todo)

Object updater

To allow flexible updates of visual_object or derived classes (short: object), an object_updater can be attached to a object. Update are also attachable to other updaters, so updater chains are possible to create.