void GL::genBuffers(Sizei n, UInt * buffers)
{
g_OpenGLFunctions.glGenBuffers(n, buffers);
CHECK_GL_ERROR2(glGenBuffers, n, buffers);
}
void visual_unit_factory::generate_geometry_parallel( dataset_db &db, QGLFunctions qglf ){
//
helpers::debug_out( QString("creating geometry for dataset: [%1]...").arg( db.name()) );
// Create the buffers.
//
qglf.glGenBuffers(2,_active_visual_unit->_info._vbo_ids);
// How many threads will we use?
//
int ideal = QThread::idealThreadCount();
// Go through each point in the database.
//
std::vector<Vertex> _vertices;
std::vector<GLshort> _indices;
int num_points = db.num_points();
if( num_points > 0 ){
int points_per_thread = num_points / ideal;
// Create the workers.
//
std::vector<buffer_worker*> workers;
std::vector<QThread*> threads;
for( int ii=0; ii<ideal; ii++ )
workers.push_back( new buffer_worker( points_per_thread, points_per_thread*ii, &db ) );
// Thread our workers.
//
for( int ii=0; ii<workers.size(); ii++ ){
buffer_worker *worker = workers.at(ii);
QThread* thread = new QThread;
worker->moveToThread(thread);
connect(worker, SIGNAL(error(QString)), this, SLOT(errorString(QString)));
connect(thread, SIGNAL(started()), worker, SLOT(process()));
connect(worker, SIGNAL(finished()), thread, SLOT(quit()));
//connect(worker, SIGNAL(finished()), worker, SLOT(deleteLater()));
connect(thread, SIGNAL(finished()), thread, SLOT(deleteLater()));
thread->start();
threads.push_back(thread);
}
// Wait for all workers to finish.
// Break when all of our workers are marked finished.
//
unsigned int stamp = helpers::timestamp();
bool done=false;
while( !done ){
done=true;
for( int ii=0; ii<workers.size(); ii++ ){
if( !workers.at(ii)->_finished )
done=false;
}
}
float elapsed = helpers::milliseconds_to_seconds( helpers::time_elapsed(stamp) );
helpers::debug_out(QString("threads finished: [seconds: %1]").arg(elapsed));
// Concat all of the fragments.
//
// Find our amounts for reserving.
//
int fragments_verts_count = 0;
int fragments_index_count = 0;
for( int ii=0; ii<workers.size(); ii++ ){
buffer_worker *worker = workers.at(ii);
fragments_verts_count += worker->_fragment_vertices.size();
fragments_index_count += worker->_fragment_indices.size();
}
_vertices.reserve( fragments_verts_count );
_indices.reserve( fragments_index_count );
// Insert all fragments.
//
for( int ii=0; ii<workers.size(); ii++ ){
buffer_worker *worker = workers.at(ii);
_vertices.insert( _vertices.end(), worker->_fragment_vertices.begin(), worker->_fragment_vertices.end() );
_indices.insert( _indices.end(), worker->_fragment_indices.begin(), worker->_fragment_indices.end() );
}
}
//
else
push_fake_piechart();
//
helpers::debug_out( QString("Created glyphs [num: %1]").arg( num_points ) );
//
helpers::check_error_gl(20);
// Vertices.
//
qglf.glBindBuffer(GL_ARRAY_BUFFER, _active_visual_unit->_info._vbo_ids[VBO_ELEMENT_VERTEX]);
qglf.glBufferData(GL_ARRAY_BUFFER, _vertices.size() * sizeof(Vertex), &_vertices[0], GL_STATIC_DRAW);
// Indices.
//
qglf.glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _active_visual_unit->_info._vbo_ids[VBO_ELEMENT_INDICES]);
qglf.glBufferData(GL_ELEMENT_ARRAY_BUFFER, _indices.size() * sizeof(GLushort), &_indices[0], GL_STATIC_DRAW);
//
helpers::check_error_gl(21);
// How many vertices.
//
helpers::debug_out( QString("...num vertices [val:%1]")
.arg(_vertices.size()) );
_active_visual_unit->_info._draw_amount = _vertices.size();
// How many charts?
//
//_active_visual_unit->_info._num_charts = _vertices.count() / _active_visual_unit->_info._verts_in_single_chart;
// How many megabytes is our vbo.
//
int nBufferSize = 0;
qglf.glGetBufferParameteriv(GL_ARRAY_BUFFER, GL_BUFFER_SIZE, &nBufferSize);
int originalVertexArraySize = ( nBufferSize / sizeof(Vertex) );
helpers::debug_out( QString("...vbo size [size:%1mb]")
.arg( (qreal)originalVertexArraySize / (qreal)1000000.0 ) );
//
_active_visual_unit->_info._ready_to_draw=true;
}
// Geometry.
//
//++++++++++++++++++++++
void visual_unit_factory::generate_geometry( dataset_db &db, QGLFunctions qglf ){
//
helpers::debug_out( QString("creating geometry for dataset: [%1]...").arg( db.name()) );
// Create the buffers.
//
qglf.glGenBuffers(2,_active_visual_unit->_info._vbo_ids);
// Get our list of colors.
//
std::vector<QVector3D> colors = db.descriptor()->list_color();
QVector3D true_color;
// Go through each point in the database.
//
unsigned int stamp = helpers::timestamp();
bool result=true;
model_point point;
int num_points = db.num_points();
//int num_points = 10;
for( int ii=0; ii<num_points; ii++ ){
// Get the next point.
//
result = db.get_point( ii, &point, true );
// End if we didn't get a point.
//
if( !result )
break;
// Find the true color.
//
true_color = db.descriptor()->class_option_to_color( point._attribute_class );
// Create a piechart for the point.
//
push_piechart( point._position.x(), point._position.y(), point._probability_values, true_color, colors, 0.015 );
}
float elapsed = helpers::milliseconds_to_seconds( helpers::time_elapsed(stamp) );
helpers::debug_out(QString("glyphs finished: [seconds: %1]").arg(elapsed));
// Empty dataset?
//
if( num_points == 0 )
push_fake_piechart();
//
helpers::debug_out( QString("Created glyphs [num: %1]").arg( db.num_points() ) );
//
helpers::check_error_gl(20);
// Vertices.
//
qglf.glBindBuffer(GL_ARRAY_BUFFER, _active_visual_unit->_info._vbo_ids[VBO_ELEMENT_VERTEX]);
qglf.glBufferData(GL_ARRAY_BUFFER, _active_visual_unit->_info._vertices.count() * sizeof(Vertex), &_active_visual_unit->_info._vertices[0], GL_STATIC_DRAW);
// Indices.
//
qglf.glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _active_visual_unit->_info._vbo_ids[VBO_ELEMENT_INDICES]);
qglf.glBufferData(GL_ELEMENT_ARRAY_BUFFER, _active_visual_unit->_info._indices.count() * sizeof(GLushort), &_active_visual_unit->_info._indices[0], GL_STATIC_DRAW);
//
helpers::check_error_gl(21);
// How many vertices.
//
helpers::debug_out( QString("...num vertices [val:%1]")
.arg(_active_visual_unit->_info._vertices.count()) );
_active_visual_unit->_info._draw_amount = _active_visual_unit->_info._vertices.count();
// How many charts?
//
_active_visual_unit->_info._num_charts = _active_visual_unit->_info._vertices.count() / _active_visual_unit->_info._verts_in_single_chart;
// How many megabytes is our vbo.
//
int nBufferSize = 0;
qglf.glGetBufferParameteriv(GL_ARRAY_BUFFER, GL_BUFFER_SIZE, &nBufferSize);
int originalVertexArraySize = ( nBufferSize / sizeof(Vertex) );
helpers::debug_out( QString("...vbo size [size:%1mb]")
.arg( (qreal)originalVertexArraySize / (qreal)1000000.0 ) );
//
_active_visual_unit->_info._ready_to_draw=true;
}
void SW::GLViewer::init()
{
setGL();
initGLSL();
#if BUFFER_
//glClearColor(0.0, 0.0, 0.0, 0.0);
//glDisable(GL_DITHER);
glShadeModel(GL_FLAT);
//glEnable(GL_DEPTH_TEST);
enum{Vertices, Color, Elements, NumVBOs};
GLuint buffers[NumVBOs];
// glew init is very important or errors occur
glewInit();
// generate vertex arrays, and each array is corresponding to a object to be render
glGenVertexArrays(1, &arrayId);
#ifdef QT_BUFFER
QGLFunctions qtgl;
qtgl.initializeGLFunctions(0);
#endif
// 3D world coordinate of points
#ifdef QT_BUFFER
QVector<QVector3D> Verts;
Verts.append(QVector3D(-1.0, -1.0, -1.0));
Verts.append(QVector3D(-1.0, -1.0, 1.0));
Verts.append(QVector3D(-1.0, 1.0, -1.0));
Verts.append(QVector3D(-1.0, 1.0, 1.0));
Verts.append(QVector3D(1.0, -1.0, -1.0));
Verts.append(QVector3D(1.0, -1.0, 1.0));
Verts.append(QVector3D(1.0, 1.0, -1.0));
Verts.append(QVector3D(1.0, 1.0, 1.0));
#else
GLfloat Verts[][3] = {
{-1.0, -1.0, -1.0},
{-1.0, -1.0, 1.0},
{-1.0, 1.0, -1.0},
{-1.0, 1.0, 1.0},
{1.0, -1.0, -1.0},
{1.0, -1.0, 1.0},
{1.0, 1.0, -1.0},
{1.0, 1.0, 1.0},
};
#endif
// colors of points
#ifdef QT_BUFFER
QVector<QVector3D> Colors;
Colors.append(QVector3D(0, 0.0, 0.0));
Colors.append(QVector3D(0, 0.0, 1.0));
Colors.append(QVector3D(0, 1.0, 0.0));
Colors.append(QVector3D(0, 1.0, 1.0));
Colors.append(QVector3D(1.0, 0.0, 0.0));
Colors.append(QVector3D(1.0, 0.0, 1.0));
Colors.append(QVector3D(1.0, 1.0, 0.0));
Colors.append(QVector3D(1.0, 1.0, 1.0));
#else
GLfloat Colors[][3] = {
{0.0, 0.0, 0.0},
{0.0, 0.0, 1.0},
{0.0, 1.0, 0.0},
{0.0, 1.0, 1.0},
{1.0, 0.0, 0.0},
{1.0, 0.0, 1.0},
{1.0, 1.0, 0.0},
{1.0, 1.0, 1.0},
};
#endif
// indices of points
#ifdef QT_BUFFER
QVector<uint> Indices;
Indices.append(0);Indices.append(1);Indices.append(3);Indices.append(2);
Indices.append(4);Indices.append(6);Indices.append(7);Indices.append(5);
Indices.append(2);Indices.append(3);Indices.append(7);Indices.append(6);
Indices.append(0);Indices.append(4);Indices.append(5);Indices.append(1);
Indices.append(0);Indices.append(2);Indices.append(6);Indices.append(4);
Indices.append(1);Indices.append(5);Indices.append(7);Indices.append(3);
#else
GLubyte Indices[]={
0, 1, 3, 2,
4, 6, 7, 5,
2, 3, 7, 6,
0, 4, 5, 1,
0, 2, 6, 4,
1, 5, 7, 3,
};
#endif
// active a vertex array
glBindVertexArray(arrayId);
// generate buffer objects, and each attribute(vertices, color, and normal..) is corresponding to one buffer
#ifdef QT_BUFFER
qtgl.glGenBuffers(NumVBOs, buffers);
#else
glGenBuffers(NumVBOs, buffers);
#endif
//---------------------------------------buffer for vertices----------------------------------//
// active a buffer object
#ifdef QT_BUFFER
qtgl.glBindBuffer(GL_ARRAY_BUFFER, buffers[Vertices]);
#else
glBindBuffer(GL_ARRAY_BUFFER, buffers[Vertices]);
#endif
// alloc a space for buffer
#ifdef QT_BUFFER
qtgl.glBufferData(GL_ARRAY_BUFFER, Verts.size()*sizeof(GLfloat), Verts.data(), GL_STATIC_DRAW);
#else
glBufferData(GL_ARRAY_BUFFER, sizeof(Verts), Verts, GL_STATIC_DRAW);
#endif
// put the data into the corresponding buffer
glVertexPointer(3, GL_FLOAT, 0,BUFFER_OFFSET(0));
glEnableClientState(GL_VERTEX_ARRAY);
//---------------------------------------buffer for colors----------------------------------//
// buffer for colors
#ifdef QT_BUFFER
qtgl.glBindBuffer(GL_ARRAY_BUFFER, buffers[Color]);
#else
glBindBuffer(GL_ARRAY_BUFFER, buffers[Color]);
#endif
#ifdef QT_BUFFER
qtgl.glBufferData(GL_ARRAY_BUFFER, Colors.size()*sizeof(GLfloat), Colors.data(), GL_STATIC_DRAW);
#else
glBufferData(GL_ARRAY_BUFFER, sizeof(Colors), Colors, GL_STATIC_DRAW);
#endif
glColorPointer(3, GL_FLOAT, 0, BUFFER_OFFSET(0));
glEnableClientState(GL_COLOR_ARRAY);
//---------------------------------------buffer for elements----------------------------------//
// buffer for elements
#ifdef QT_BUFFER
numElement = Indices.size();
#else
numElement = sizeof(Indices)/sizeof(Indices[0]);
#endif
#ifdef QT_BUFFER
qtgl.glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffers[Elements]);
#else
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffers[Elements]);
#endif
#ifdef QT_BUFFER
qtgl.glBufferData(GL_ELEMENT_ARRAY_BUFFER, Indices.size()*sizeof(uint), Indices.data(), GL_STATIC_DRAW);
#else
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(Indices), Indices, GL_STATIC_DRAW);
#endif
#endif
}