The Billboard helper
lets you create geometry that is camera-aligned in the VRML97 browser.
The objects always align to the viewpoint in the VRML97 browser.
Any geometry linked to
the Billboard helper will rotate about the local Z axis of the helper
object to face the viewer. Since it rotates about the location of
the Billboard, it is best to center the Billboard on the object
that you will link to it.
The direction of the
negative Y axis of the object, which will be its front, is aligned
with the negative Y axis of the helper, and will be the Billboard
surface that always faces the viewer. This is the side usually seen
from the default camera position.
To create a Billboard helper object:
- Click the Billboard button and click-drag
in the Top viewport to create the helper.
- Link objects to the billboard to keep
them aligned with the camera.
The Billboard rollout
contains the following option:
- Screen Alignment
Keeps the geometry linked
to the Billboard helper aligned, even when the viewer elevates,
pitches, and rolls.
- Icon Size
Determines the size of the
Billboard helper in the scene.