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# openvrml::vrml97_node::lod_node Class Reference

Inheritance diagram for openvrml::vrml97_node::lod_node:

[legend]
List of all members.

## Detailed Description

Represents LOD node instances.

## Public Member Functions
| lod_node (const node_type &type, const boost::shared_ptr< openvrml::scope > &scope)
| Construct.
virtual | ~lod_node () throw ()
| Destroy.
virtual bool | modified () const
| Determine whether the node has been modified.
virtual const openvrml::bounding_volume & | bounding_volume () const
| Get the bounding volume.
virtual const std::vector< node_ptr > & | children () const throw ()
| Get the children in the scene graph.
virtual void | activate (double timestamp, bool over, bool active, double *p)
## Private Member Functions
virtual void | do_render_child (openvrml::viewer &viewer, rendering_context context)
| Render the node.
virtual void | recalcBSphere ()
| Recalculate the bounding volume.
## Private Attributes
exposedfield< mfnode > | level_
| level exposedField.
sfvec3f | center_
| center field.
mffloat | range_
| range field.
mfnode | children_
| Caches the active level for fast access by lod_node::children.
bounding_sphere | bsphere
| Cached copy of the bounding_sphere enclosing this node's children.
## Friends
class | lod_class
| Class object for LOD nodes.

## Constructor & Destructor Documentation

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

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

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

| Destroy.

## Member Function Documentation

bool openvrml::vrml97_node::lod_node::modified | ( |  | ) | const`[virtual]`

| Determine whether the node has been modified. Returns: `true` if the node or one of its children has been modified, `false` otherwise. Reimplemented from openvrml::node.

const bounding_volume & openvrml::vrml97_node::lod_node::bounding_volume | ( |  | ) | const`[virtual]`

| Get the bounding volume. Returns: the bounding volume associated with the node. Reimplemented from openvrml::node.

const std::vector< node_ptr > & openvrml::vrml97_node::lod_node::children | ( |  | ) | const throw ()`[virtual]`

| Get the children in the scene graph. Returns: the child nodes in the scene graph. Implements openvrml::grouping_node.

void openvrml::vrml97_node::lod_node::activate | ( | double | time,
|  | bool | isOver,
|  | bool | isActive,
|  | double * | p
| ) | `[virtual]`

| Pass on to enabled touchsensor child. Implements openvrml::grouping_node.

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

  | Render the node. Render one of the children. Parameters:
  | viewer | a Viewer.
  | context | a rendering context.
Reimplemented from openvrml::child_node.

void openvrml::vrml97_node::lod_node::recalcBSphere | ( |  | ) | `[private, virtual]`

| Recalculate the bounding volume.

## Friends And Related Function Documentation

openvrml::vrml97_node::lod_node::lod_class`[friend]`

| Class object for LOD nodes.

## Member Data Documentation

exposedfield< mfnode > openvrml::vrml97_node::lod_node::level_`[private]`

| level exposedField.

sfvec3f openvrml::vrml97_node::lod_node::center_`[private]`

| center field.

mffloat openvrml::vrml97_node::lod_node::range_`[private]`

| range field.

mfnode openvrml::vrml97_node::lod_node::children_`[private]`

| Caches the active level for fast access by lod_node::children.

bounding_sphere openvrml::vrml97_node::lod_node::bsphere`[private]`

| Cached copy of the bounding_sphere enclosing this node's children.