BALL::VIEW::MeshBuffer Class Reference
[Renderer]

Wrapper class to draw BALLView Mesh instances with OpenGL vertex buffer objects. More...

#include <vertexBuffer.h>

List of all members.

Public Types
typedef GLuint	Buffer [4]
Public Member Functions
	MeshBuffer (const MeshBuffer &mesh_buffer)
const MeshBuffer &	operator= (const MeshBuffer &buffer)
const Mesh *	getMesh ()
	Get the Mesh for this buffer object.
void	setMesh (const Mesh &mesh)
	Set the Mesh which shall be drawn with this buffer object.
bool	initialize ()
	Transfer all vertex, normal, index and color data of the mesh into the vertex buffer object.
bool	draw ()
	Draw the mesh from the buffer.
void	clear ()
	Unset the mesh pointer and clear the buffer.
void	clearBuffer ()
	Free the reserved (and filled) vertex buffer.
bool	isBusy () const
	Return true, if currently updateing or drawing.
Static Public Member Functions
static bool	initGL ()
	Initialise the GL needed methods.
static void	setGLRenderer (GLRenderer *renderer)
	Set the GLRender.
Protected Attributes
const Mesh *	mesh_
Buffer	buffer_
bool	filled_
bool	busy_
bool	multiple_colors_
ColorRGBA	color_
Size	vertices_
Size	triangles_
Static Protected Attributes
static GLRenderer *	gl_renderer_

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Detailed Description

Wrapper class to draw BALLView Mesh instances with OpenGL vertex buffer objects.

Vertex Buffer Objects are an OpenGL extension available since OpenGL version 1.5.

See http://oss.sgi.com/projects/ogl-sample/registry/EXT/pixel_buffer_object.txt

Vertex Buffer Objects can drasticaly increase drawing speed for triangulated surfaces (up to 5 fold) compared with OpenGL display lists. To ensure a maximum of platform independence we use method pointers in the source file. These must be initialised by calling MeshBuffer::initGL() (See below).

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Member Function Documentation

static bool BALL::VIEW::MeshBuffer::initGL

(

)

[static]

Initialise the GL needed methods.

Call this method one time after having a valid GL context (e.g. in GLRenderer::init).

static void BALL::VIEW::MeshBuffer::setGLRenderer

(

GLRenderer *

renderer

)

[static]

Set the GLRender.

This GLRender pointer is used to know if to draw the mesh transparent solid or transparent, as solid triangles or as points. Meshes can currently not drawn in wireframe mode with vertex buffer.