Node Class Reference

Represents a node of a scene graph.

#include <node.hpp>

Public Member Functions
	Node ()
	Default constructor. More...
void	render (glm::mat4 const &WVP, glm::mat4 const &parentTransform=glm::mat4(1.0f)) const
	Render this node. More...
void	render (glm::mat4 const &WVP, glm::mat4 const &world, GLuint program, std::function< void(GLuint)> const &set_uniforms=[](GLuint){}) const
	Render this node with a specific shader program. More...
void	set_geometry (bonobo::mesh_data const &shape)
	Set the geometry of this node. More...
size_t	get_indices_nb () const
	Get the number of indices to use. More...
void	set_indices_nb (size_t const &indices_nb)
	Set the number of indices to use. More...
void	set_program (GLuint const *const program, std::function< void(GLuint)> const &set_uniforms=[](GLuint){})
	Set the program of this node. More...
void	add_texture (std::string const &name, GLuint tex_id, GLenum type)
	Add a texture to this node. More...
void	add_child (Node const *child)
	Add a child to this node. More...
size_t	get_children_nb () const
	Return the number of children to this node. More...
Node const *	get_child (size_t index) const
	Return the ith child. More...
TRSTransformf const &	get_transform () const
	Return this node transformation matrix. More...
TRSTransformf &	get_transform ()

Private Attributes
GLuint	_vao
GLsizei	_vertices_nb
GLsizei	_indices_nb
GLenum	_drawing_mode
bool	_has_indices
GLuint const *	_program
std::function< void(GLuint)>	_set_uniforms
std::vector< std::tuple< std::string, GLuint, GLenum > >	_textures
TRSTransformf	_transform
std::vector< Node const * >	_children
std::string	_name

Constructor & Destructor Documentation

Node()

Node::Node

(

)

Member Function Documentation

add_child()

void Node::add_child

(

Node const *

child

)

Parameters

[in]

child

pointer to the child to add; the pointer has to be non-null

add_texture()

void Node::add_texture	(	std::string const &	name,
		GLuint	tex_id,
		GLenum	type
	)

Parameters

[in]	name	the variable name used by the attached OpenGL shader program; in assignment 1, this will be diffuse_texture
[in]	tex_id	the name of an OpenGL 2D-texture
[in]	type	the type of texture, i.e. GL_TEXTURE_2D, GL_TEXTURE_CUBE_MAP, etc.

get_child()

Node const * Node::get_child

(

size_t

index

)

const

Parameters

[in]

index

the index of the child to return; index should be strictly less than the number of children

Returns

a pointer to the desired child

get_children_nb()

size_t Node::get_children_nb

(

)

const

Returns

the number of children

get_indices_nb()

size_t Node::get_indices_nb

(

)

const

Returns

how many indices to use when rendering

get_transform() [1/2]

TRSTransformf & Node::get_transform

(

)

get_transform() [2/2]

TRSTransformf const & Node::get_transform

(

)

const

Returns

the composition of the rotation, scaling and translation transformations; this is the model matrix of this node

render() [1/2]

void Node::render	(	glm::mat4 const &	WVP,
		glm::mat4 const &	parentTransform = glm::mat4(1.0f)
	)		const

Parameters

[in]	WVP	Matrix transforming from world-space to clip-space
[in]	parentTransform	Matrix transforming from parent-space to world-space

render() [2/2]

void Node::render	(	glm::mat4 const &	WVP,
		glm::mat4 const &	world,
		GLuint	program,
		std::function< void(GLuint)> const &	set_uniforms = [](GLuint ){}
	)		const

Parameters

[in]	WVP	Matrix transforming from world-space to clip-space
[in]	world	Matrix transforming from model-space to world-space
[in]	program	OpenGL shader program to use
[in]	set_uniforms	function that will take as argument an OpenGL shader program, and will setup that program's uniforms

set_geometry()

void Node::set_geometry

(

bonobo::mesh_data const &

shape

)

A node without any geometry will not render itself, but its children will be rendered if they have any geometry.

Parameters

[in]

shape

OpenGL data to use as geometry

set_indices_nb()

void Node::set_indices_nb

(

size_t const &

indices_nb

)

Parameters

[in]

indices_nb

how many indices to use when rendering

set_program()

void Node::set_program	(	GLuint const *const	program,
		std::function< void(GLuint)> const &	set_uniforms = [](GLuint ){}
	)

A node without a program will not render itself, but its children will be rendered if they have one.

Parameters

[in]	pointer	to the program OpenGL shader program to use; the pointer should not be nul.
[in]	set_uniforms	function that will take as argument an OpenGL shader program, and will setup that program's uniforms

Member Data Documentation

_children

std::vector<Node const*> Node::_children

private

_drawing_mode

GLenum Node::_drawing_mode

private

_has_indices

bool Node::_has_indices

private

_indices_nb

GLsizei Node::_indices_nb

private

_name

std::string Node::_name

private

_program

GLuint const* Node::_program

private

_set_uniforms

std::function<void (GLuint)> Node::_set_uniforms

private

_textures

std::vector<std::tuple<std::string, GLuint, GLenum> > Node::_textures

private

_transform

TRSTransformf Node::_transform

private

_vao

GLuint Node::_vao

private

_vertices_nb

GLsizei Node::_vertices_nb

private

---

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

• /home/pmoreau/teaching/CG_Labs/src/core/node.hpp
• /home/pmoreau/teaching/CG_Labs/src/core/node.cpp