Definition:
Description:
The billboard node modifies its coordinate system so that the local z-axis
of its children is always pointing towards the viewer.
Billboard {
eventIn MFNode addChildren
eventIn MFNode removeChildren
exposedField SFVec3f axisOfRotation 0 1 0
exposedField MFNode children []
field SFVec3f bboxCenter 0 0 0
field SFVec3f bboxSize -1 -1 -1
}
Explanation:
axisOfRotation
:
specifies the axis the object will rotate on so that the local
z-axis will point at the viewer
children
:
these objects will modify their coordinate system to always face
the viewer
bboxCenter/
bboxSize :
specifies the bounding box that encloses the children