scene graph node (base class) More...

#include <glvertex_nodes.h>

Inheritance diagram for lgl_Node:

[legend]

Public Types
enum	lgl_export_enum
	scene graph export modes

Public Member Functions
	lgl_Node (const std::string &id="")
	default ctor

	lgl_Node (const lgl_Node &node)
	copy ctor

	lgl_Node (lgl_Node *node, const std::string &id="")
	custom ctor

virtual	~lgl_Node ()
	dtor

virtual std::string	getClassId () const
	get the class id

std::string	getId () const
	get the node identifier

void	setId (const std::string &id="")
	set the node identifier

std::string	getAltId () const
	get the alternate node identifier

void	setAltId (const std::string &id="")
	set the alternate node identifier

unsigned int	children () const
	get the number of children of the node

bool	leaf () const
	is the node a leaf?

unsigned int	references () const
	get the number of references to the node

bool	shared () const
	is the node shared?

lgl_Node *	get (unsigned int i=0) const
	get a child node

template<class T >
T *	add (T *node)
	add a child node with a specific type

void	remove (unsigned int i=0)
	remove a child from the node

void	replace (lgl_Node *node, unsigned int i=0)
	replace a child of the node

lgl_Node *	take (unsigned int i=0)
	unlink a child and take ownership

void	link (lgl_Node *node)
	add the links of a node

void	unlink ()
	remove the links of the node

virtual bool	checkForCycles ()
	check for graph cycles

bool	enabled () const
	is the node enabled?

bool	disabled () const
	is the node disabled?

void	enable (bool yes=true)
	enable the node

void	disable (bool yes=true)
	disable the node

void	toggle ()
	toggle the node

bool	shown () const
	is the node shown?

bool	hidden () const
	is the node hidden?

void	show (bool yes=true)
	show the node and its children

void	hide (bool yes=true)
	hide the node and its children

virtual lgl_Node *	find (const std::string &id)
	find a node with a specific identifier

template<class T >
T *	find ()
	find a node with a specific type

template<class T >
T *	find (const std::string &id)
	find a node with a specific identifier and type

void	renderSceneGraph (double dt=0)
	render and update the entire scene subgraph

void	drawSceneGraph (vec4 color=vec4(1))
	draw the entire scene subgraph without updating

void	drawSceneGraph (const mat4 &m)
	draw the entire scene subgraph without updating

void	preupdateSceneGraph (double dt)
	pre-update the entire scene subgraph

void	updateSceneGraph (double dt)
	update the entire scene subgraph

virtual void	getBoundingBox (vec3 &bboxmin, vec3 &bboxmax)
	get the bounding box of the entire subgraph More...

double	getBoundingSphere (vec3 &center)
	get the bounding sphere of the entire subgraph More...

vec3	getCenter ()
	get the bounding box center of the entire subgraph

vec3	getExtent ()
	get the bounding box extent of the entire subgraph

double	getRadius ()
	get the bounding sphere radius of the entire subgraph More...

double	getNorm ()
	get the bounding sphere norm of the entire subgraph More...

virtual std::vector< vec4 >	getVertexCoordinates (mat4 trans=mat4())

void	getExactBoundingBox (vec3 &bboxmin, vec3 &bboxmax)
	get the exact bounding box of the entire subgraph More...

lglVBO *	pickSceneGraph (vec3 origin, vec3 direction, double mindist=0)
	pick the entire scene subgraph

bool	hasTransparency ()
	check the entire subgraph whether or not it contains semi-transparent geometry

virtual unsigned int	countAll ()
	count all nodes (count multiply linked nodes)

virtual unsigned int	countAllOnce ()
	count all nodes (count multiply linked nodes once)

virtual unsigned int	countAllPrimitives ()
	count all primitives

unsigned int	countAllVertices ()
	count all vertices

virtual bool	stateless () const
	is the node stateless?

virtual bool	ordered () const
	is the node ordered?

bool	convertable () const
	is the node convertable?

bool	cloneable () const
	is the node cloneable?

bool	optimizable () const
	is the node optimizable?

virtual void	optimizeAll ()
	optimize all nodes

virtual void	restartAll (double animation=0)
	restart all animations

virtual void	pauseAll (bool yes=true)
	pause all animations

virtual void	speedupAll (double speedup=1)
	speedup all animations

virtual void	finishAll ()
	finish all transitions

std::string	exportAll (lgl_export_enum mode=LGL_EXPORT_NODES, int indentation=0, int increment=3)
	export all nodes

void	exportNodes (std::string filename)
	export graph nodes

void	exportGraph (std::string filename)
	export link graph

void	exportCommands (std::string filename)
	export graphics commands

bool	saveObj (std::string filename)
	save into OBJ file

Static Public Member Functions
static GL *	getGL ()
	get the scene graph GL singleton

Protected Member Functions
lgl_Node *	add_node (lgl_Node *node)
	add a child to the node

virtual void	render ()
	reimplement this method to render a node

virtual void	update (double dt)
	reimplement this method to update a node

virtual void	pick ()
	reimplement this method to pick a node

Friends
class	lgl_SubgraphNode

Detailed Description

scene graph node (base class)

a scene graph node provides virtual render() and update() methods to be reimplemented in derived classes

the default implementation just calls the corresponding methods of its child nodes
child nodes can be linked with the add() method
the add() method allows chaining (by means of a function template)
added nodes are reference-counted
the graph must not contain a cycle

Member Function Documentation

◆ getBoundingBox()

virtual void lgl_Node::getBoundingBox	(	vec3 &	bboxmin,
		vec3 &	bboxmax
	)

inlinevirtual

get the bounding box of the entire subgraph

the bounding box is invalid if a maximum component is less than the minimum component

Reimplemented in lgl_SubgraphNode.

◆ getBoundingSphere()

double lgl_Node::getBoundingSphere ( vec3 & center )

inline

get the bounding sphere of the entire subgraph

returns the radius of the bounding sphere
the bounding sphere is invalid if the radius is zero

◆ getExactBoundingBox()

void lgl_Node::getExactBoundingBox	(	vec3 &	bboxmin,
		vec3 &	bboxmax
	)

inline

get the exact bounding box of the entire subgraph

this is a computationally expensive operation

◆ getNorm()

double lgl_Node::getNorm ( )

inline

get the bounding sphere norm of the entire subgraph

zero norm means that the subgraph does not contain valid geometry

◆ getRadius()

double lgl_Node::getRadius ( )

inline

get the bounding sphere radius of the entire subgraph

zero radius means that the subgraph does not contain valid geometry

◆ getVertexCoordinates()

virtual std::vector<vec4> lgl_Node::getVertexCoordinates ( mat4 trans = mat4() )

inlinevirtual

this is a computationally expensive operation

Reimplemented in lgl_SubgraphNode.

The documentation for this class was generated from the following file:

glvertex_nodes.h

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Friends

Detailed Description

Member Function Documentation

◆ getBoundingBox()

◆ getBoundingSphere()

◆ getExactBoundingBox()

◆ getNorm()

◆ getRadius()

◆ getVertexCoordinates()