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# openvrml::vrml97_node::billboard_node Class Reference

Inheritance diagram for openvrml::vrml97_node::billboard_node:

[legend]
List of all members.

## Detailed Description

Billboard node instances.

## Public Member Functions
| billboard_node (const node_type &type, const boost::shared_ptr< openvrml::scope > &scope)
| Construct.
virtual | ~billboard_node () throw ()
| Destroy.
## Static Public Member Functions
static const mat4f | billboard_to_matrix (const billboard_node &node, const mat4f &modelview)
| Get the bounding box transformation matrix.
## Private Member Functions
virtual void | do_render_child (openvrml::viewer &viewer, rendering_context context)
| Render the node.
## Private Attributes
exposedfield< sfvec3f > | axis_of_rotation_
| axisOfRotation exposedField.
viewer::object_t | xformObject
| Handle for the renderer.
## Friends
class | billboard_class
| Class object for Billboard nodes.

## Constructor & Destructor Documentation

openvrml::vrml97_node::billboard_node::billboard_node | ( | const node_type & | type,
|  | const boost::shared_ptr< openvrml::scope > & | scope
| ) |

  | Construct. Parameters:
  | type | the node_type associated with the node instance.
  | scope | the scope to which the node belongs.

openvrml::vrml97_node::billboard_node::~billboard_node | ( |  | ) | throw ()`[virtual]`

| Destroy.

## Member Function Documentation

const mat4f openvrml::vrml97_node::billboard_node::billboard_to_matrix | ( | const billboard_node & | node,
|  | const mat4f & | modelview
| ) | `[static]`

  | Get the bounding box transformation matrix. Parameters:
  | node | a pointer to a billboard_node.
  | modelview | input ModelView transformation matrix.
Returns: the bounding box transformation matrix.

void openvrml::vrml97_node::billboard_node::do_render_child | ( | openvrml::viewer & | viewer,
|  | rendering_context | context
| ) | `[private, virtual]`

  | Render the node. Parameters:
  | viewer | a viewer.
  | context | the rendering context.
Reimplemented from openvrml::vrml97_node::group_node.

## Friends And Related Function Documentation

openvrml::vrml97_node::billboard_node::billboard_class`[friend]`

| Class object for Billboard nodes.

## Member Data Documentation

exposedfield< sfvec3f > openvrml::vrml97_node::billboard_node::axis_of_rotation_`[private]`

| axisOfRotation exposedField.

viewer::object_t openvrml::vrml97_node::billboard_node::xformObject`[private]`

| Handle for the renderer.