output_params_type const *
control_type::
get_output_params( ) const
{
d_assert( not_busy( ));
if ( p_worker_ && ! is_going_down( ) ) {
return & (p_worker_->get_output_params( ));
}
return 0;
}
// Display a given error code on a dialog in the middle of the screen
void DisplayError(const char * pFormatStr, ...)
{
char FormatStrBuffer[100] = { 0 };
va_list msgArgs;
/* Convert the parameters to an actual message and write it into
* FormatStrBuffer. */
va_start (msgArgs, pFormatStr);
vsprintf (FormatStrBuffer, pFormatStr, msgArgs);
va_end (msgArgs);
// printf("Error - %s",FormatStrBuffer);
not_busy();
alert("Error", FormatStrBuffer, NULL, "Continue", NULL, 0, 0);
}
int sprite_bank_minus(DIALOG *d)
{
int sbank = currentGfxBank;
if (GfxBanks == NULL) return D_REDRAW;
set_Gfx_bank(currentGfxBank-1);
if (sbank != currentGfxBank) {
busy();
SwitchGraphicsBank(sbank, currentGfxBank);
if(GfxBankExtraInfo[sbank].planes !=
GfxBankExtraInfo[currentGfxBank].planes)
palette_reset(); // fix for bug 03
not_busy();
return D_REDRAW;
} else
return D_O_K;
}
void Volume::display_marchin_cube()
{
#ifdef CGAL_SURFACE_MESH_DEMO_USE_MARCHING_CUBE
if(m_surface_mc.empty())
{
QTime total_time;
total_time.start();
values_list->save_values(fileinfo.absoluteFilePath());
unsigned int nx = m_image.xdim();
unsigned int ny = m_image.ydim();
unsigned int nz = m_image.zdim();
if(nx * ny * nz == 0)
{
status_message("No volume loaded.");
return;
}
mc_timer.reset();
busy();
status_message("Marching cubes...");
mc_timer.start();
m_surface_mc.clear();
if(mc.ntrigs()!=0)
mc.clean_all();
mc.set_resolution(nx,ny,nz);
mc.init_all();
mc.set_ext_data(static_cast<unsigned char*>(m_image.image()->data));
nbs_of_mc_triangles.resize(values_list->numberOfValues());
for(int value_id = 0;
value_id < values_list->numberOfValues();
++value_id)
{
status_message(tr("Marching cubes, isovalue #%1...").arg(value_id));
// set data
// for(unsigned int i=0;i<nx;i++)
// for(unsigned int j=0;j<ny;j++)
// for(unsigned int k=0;k<nz;k++)
// {
// const float& value = m_image.value(i,j,k);
// mc.set_data(value,i,j,k);
// }
// compute scaling ratio
if(value_id > 0)
mc.init_temps();
mc.run(values_list->value(value_id),
m_image.vx(),
m_image.vy(),
m_image.vz());
mc.clean_temps();
std::vector<double> facets;
mc.get_facets(facets);
mc_timer.stop();
const unsigned int begin = value_id == 0 ? 0 : nbs_of_mc_triangles[value_id-1];
const unsigned int nbt = facets.size() / 9;
for(unsigned int i=begin;i<nbt;i++)
{
const Point a(facets[9*i], facets[9*i+1], facets[9*i+2]);
const Point b(facets[9*i+3], facets[9*i+4], facets[9*i+5]);
const Point c(facets[9*i+6], facets[9*i+7], facets[9*i+8]);
const Triangle_3 t(a,b,c);
const Vector u = t[1] - t[0];
const Vector v = t[2] - t[0];
Vector n = CGAL::cross_product(u,v);
n = n / std::sqrt(n*n);
m_surface_mc.push_back(Facet(t,n,values_list->item(value_id)));
}
nbs_of_mc_triangles[value_id]=m_surface_mc.size();
mc_timer.start();
}
mc_timer.stop();
not_busy();
mc_total_time = total_time.elapsed();
// invalidate the display list
lists_draw_surface_mc_is_valid = false;
list_draw_marching_cube_is_valid = false;
}
CGAL::Bbox_3 bbox(0,0,0,0,0,0);
for(std::vector<Facet>::const_iterator
it = m_surface_mc.begin(), end = m_surface_mc.end();
it != end; ++it)
{
bbox = bbox + it->get<0>().bbox();
}
m_view_mc = true;
m_view_surface = false;
Q_EMIT changed();
if(!m_surface_mc.empty())
{
Q_EMIT new_bounding_box(bbox.xmin(),
bbox.ymin(),
bbox.zmin(),
bbox.xmax(),
bbox.ymax(),
bbox.zmax());
}
status_message(tr("Marching cubes done. %2 facets in %1s (CPU time), total time is %3s.")
.arg(mc_timer.time())
.arg(m_surface_mc.size())
.arg(mc_total_time/1000.));
save_image_settings(fileinfo.absoluteFilePath());
#endif // CGAL_SURFACE_MESH_DEMO_USE_MARCHING_CUBE
}
void
control_type::
calc_next
( sheet_type const & src_sheet
, sheet_type & trg_sheet
, sheet_type & extra_sheet
, bool are_extra_passes_disabled
)
{
// Runs in the master thread.
// The worker thread may not even be created yet.
d_assert( QThread::currentThread( ) != p_worker_);
// We should not be processing this message after we have exited.
if ( is_going_down( ) ) {
d_assert( false);
return;
}
// We will be busy until we process the "finish" message from the worker thread.
d_assert( not_busy( ));
is_busy_ = true;
// If p_worker_ is zero then we still have to create the worker thread object.
if ( 0 == p_worker_ ) {
// Create the thread.
// We give the worker-thread object no parent (zero pointer) so that signals sent between
// the master and worker threads are queued instead of dispatched.
// The ctor for the worker thread runs in the master thread, during creation below.
// And that ctor starts the worker thread and waits for it to settle.
p_worker_ = new worker_thread_type( 0);
// Worker is now running.
d_assert( p_worker_ && p_worker_->isRunning( ));
// The parent serves these purposes:
// It auto-deletes the object at the end of its life.
// When you send a message to an object, Qt has to decide in which thread the message should run.
// If the target object has a parent, we use that thread that owns the target object.
// If the target object has no parent, we use p_trg->thread( ), which is initially the thread
// where the target was created. But we set it below.
//
// Since we want messages to p_worker_ to process in that thread, we have to create p_worker_ with
// no parent (or set it to zero later) and then set the thread.
//
// Instead of setting the thread, we could try setting the worker-thread object to be its own parent.
// It'd look like this:
// p_worker_->setParent( p_worker_);
// This compiles and runs, tho it's not clear what it means for auto-delete.
// And this doesn't work, even if you follow it with:
// p_worker_->moveToThread( p_worker_);
// The messages to p_worker_ still get dispatched in the master thread.
// Right now worker_->thread( ) is this (master) thread. And the parent is not set.
d_assert( p_worker_->thread( ) == QThread::currentThread( ));
d_assert( p_worker_->parent( ) == 0);
// Change the thread. You MUST do this from the thread that currently owns the object (this master thread).
// This will let the signal/slot mechanism work across threads.
p_worker_->moveToThread( p_worker_);
// This does not set the parent, so auto-delete is disabled. The worker thread does not delete itself
// after we call p_worker_->quit( ).
d_assert( p_worker_->parent( ) == 0);
// Now messages sent to p_worker_ from the master thread are queued and processed in the worker thread.
// The worker thread is now awaiting instructions.
// We use the following 2 async connections, plus ->quit( ), to control it.
// This is a Qt::QueuedConnection. It is sent from the master and processed in the worker thread.
// The target (p_worker_ in this case) determines where the message is processed.
d_verify(
connect(
p_worker_, SIGNAL( start__master_to_worker( )),
p_worker_, SLOT( run__in_worker_thread( )))
);
// This is a Qt::QueuedConnection. It is sent from the worker to the master thread.
d_verify(
connect(
p_worker_, SIGNAL( finished__worker_to_master( double)),
this, SLOT( finished__from_worker_thread( double)))
);
}
