Post

Billboard

Billboard

Overview

Billboard is a Grouping node that can contain most nodes. Contained child geometry faces the user, rotating about the specified axis. Set axisOfRotation=0 0 0 to fully face the user’s camera.

The Billboard node belongs to the Navigation component and requires at least level 2, its default container field is children. It is available since VRML 2.0 and from X3D version 3.0 or higher.

Hierarchy

1
2
3
4
+ X3DNode
  + X3DChildNode
    + X3DGroupingNode
      + Billboard

Fields

SFNode [in, out] metadata NULL [X3DMetadataObject]

Information about this node can be contained in a MetadataBoolean, MetadataDouble, MetadataFloat, MetadataInteger, MetadataString or MetadataSet node.

Hint

SFVec3f [in, out] axisOfRotation 0 1 0 (-∞,∞)

axisOfRotation direction is relative to local coordinate system.

Hint

  • Axis 0 0 0 always faces viewer.

SFBool [in, out] visible TRUE

Whether or not renderable content within this node is visually displayed.

Hints

  • The visible field has no effect on animation behaviors, event passing or other non-visual characteristics.
  • Content must be visible to be collidable and to be pickable.

SFBool [in, out] bboxDisplay FALSE

Whether to display bounding box for associated geometry, aligned with world coordinates.

Hint

  • The bounding box is displayed regardless of whether contained content is visible.

SFVec3f [ ] bboxSize -1 -1 -1 [0,∞) or −1 −1 −1

Bounding box size is usually omitted, and can easily be calculated automatically by an X3D player at scene-loading time with minimal computational cost. Bounding box size can also be defined as an optional authoring hint that suggests an optimization or constraint.

Hints

SFVec3f [ ] bboxCenter 0 0 0 (-∞,∞)

Bounding box center accompanies bboxSize and provides an optional hint for bounding box position offset from origin of local coordinate system.

Hints

MFNode [in] addChildren

Input field addChildren.

MFNode [in] removeChildren

Input field removeChildren.

MFNode [in, out] children [ ] [X3DChildNode]

Grouping nodes contain an ordered list of children nodes.

Hints

  • Each grouping node defines a coordinate space for its children, relative to the coordinate space of its parent node. Thus transformations accumulate down the scene graph hierarchy.
  • InputOnly MFNode addChildren field can append new X3DChildNode nodes via a ROUTE connection, duplicate input nodes (i.e. matching DEF, USE values) are ignored.
  • InputOnly MFNode removeChildren field can remove nodes from the children list, unrecognized input nodes (i.e. nonmatching DEF, USE values) are ignored.
  • X3D Architecture 10.2.1 Grouping and children node types

Advice

Hints

  • Put Billboard as close to the geometry as possible, nested inside Transform for local coordinate system.
  • Insert a Shape node before adding geometry or Appearance.

Warning

Example

See Also

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