vis2::GeometricObject Class Reference

This is the base class for all objects that require geometry to be drawn by OpenGL. More...

Inheritance diagram for vis2::GeometricObject:

Public Member Functions
	GeometricObject (glm::mat4 _modelMatrix, Shader *_shader, const float *_positions_Ptr, const unsigned int _pos_size, const float *_normals_Ptr, const unsigned int _norm_size, const unsigned int *_index_Ptr, const unsigned int _ind_size)
	Constructor. More...
virtual	~GeometricObject ()
	Destructor. More...
virtual void	update (double _deltaT)=0
	Abstract update function. More...
virtual void	draw (glm::mat4 &_projectionMatrix)
	Draw function. More...
Public Member Functions inherited from vis2::DrawableObject
	DrawableObject (glm::mat4 &_modelMatrix)
	Constructor. More...
virtual	~DrawableObject ()
	Destructor. More...

Protected Attributes
unsigned int	index_count
	nr of polygons to be drawn More...
GLuint	vao_handle
	handle to the vertex attribute object More...
GLuint	position_buffer_handle
	handle to the vertex buffer object containing the vertex coordinates in object space More...
GLuint	normal_buffer_handle
	handle to the normal buffer object containing the vertex normals in object space More...
GLuint	index_buffer_handle
	handle to the vertex buffer object containing the face indices for each polygon More...
Shader *	shader_Ptr
	is a pointer to the shader this object uses More...
Protected Attributes inherited from vis2::DrawableObject
glm::mat4	modelMatrix
	holds the current model matrix More...

Private Member Functions
	GeometricObject (const GeometricObject &)
	Hidden copy-constructor. More...

Detailed Description

This is the base class for all objects that require geometry to be drawn by OpenGL.

An abstract interface for ensuring all geometric objects contain at least positions, normals and face index arrays.

Definition at line 14 of file GeometricObject.h.

Constructor & Destructor Documentation

GeometricObject::GeometricObject	(	glm::mat4	_modelMatrix,
		Shader *	_shader,
		const float *	_positions_Ptr,
		const unsigned int	_pos_size,
		const float *	_normals_Ptr,
		const unsigned int	_norm_size,
		const unsigned int *	_index_Ptr,
		const unsigned int	_ind_size
	)

Constructor.

The constructor builds Vertex Buffer Objects (VBO) of out of the input arrays
and attaches them to a Vertex Attribute Object (VAO).

Parameters

[in]	_modelMatrix	is the model matrix that places the object in the world coordinate system,
[in]	_shader	is the shader program used by this object,
[in]	_positions_Ptr	is a pointer to the vertex positions array,
[in]	_pos_size	is is the size of the vertex positions array,
[in]	_normals_Ptr	is a pointer to the vertex normals array,
[in]	_norm_size	is the size of the vertex normals array,
[in]	_index_Ptr	is a pointer to the face index array,
[in]	_ind_size	is the size of the face index array.

Definition at line 6 of file GeometricObject.cpp.

GeometricObject::~GeometricObject ( )

virtual

Destructor.

Deletes the VBOs and the VAO built in the constructor.

Definition at line 62 of file GeometricObject.cpp.

vis2::GeometricObject::GeometricObject ( const GeometricObject &  )

private

Hidden copy-constructor.

Member Function Documentation

void GeometricObject::draw ( glm::mat4 &  _projectionMatrix )

virtual

Draw function.

This function activates the shader program, passes the updates to the shader uniform variables,
binds the Vertex Attribute Object (VAO), makes a draw call, then unbinds both the VAO and the shader program.

Parameters

[in]

_projectionMatrix

passes the combined view and projectino matrices.

Implements vis2::DrawableObject.

Reimplemented in vis2::GeometricObjectTextured, vis2::ModelTextured, vis2::SpinningCube, and vis2::SpinningCubeTextured.

Definition at line 71 of file GeometricObject.cpp.

virtual void vis2::GeometricObject::update ( double  _deltaT )

pure virtual

Abstract update function.

Implements vis2::DrawableObject.

Implemented in vis2::GeometricObjectTextured, vis2::ModelTextured, vis2::SpinningCubeTextured, and vis2::SpinningCube.

Member Data Documentation

GLuint vis2::GeometricObject::index_buffer_handle

protected

handle to the vertex buffer object containing the face indices for each polygon

Definition at line 58 of file GeometricObject.h.

unsigned int vis2::GeometricObject::index_count

protected

nr of polygons to be drawn

Definition at line 54 of file GeometricObject.h.

GLuint vis2::GeometricObject::normal_buffer_handle

protected

handle to the normal buffer object containing the vertex normals in object space

Definition at line 57 of file GeometricObject.h.

GLuint vis2::GeometricObject::position_buffer_handle

protected

handle to the vertex buffer object containing the vertex coordinates in object space

Definition at line 56 of file GeometricObject.h.

Shader* vis2::GeometricObject::shader_Ptr

protected

is a pointer to the shader this object uses

Definition at line 60 of file GeometricObject.h.

GLuint vis2::GeometricObject::vao_handle

protected

handle to the vertex attribute object

Definition at line 55 of file GeometricObject.h.

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

• src/geometry/GeometricObject.h
• src/geometry/GeometricObject.cpp