magnet::GL::Buffer<GLfloat>& getBuffer()
{
if (singleValueMode())
M_throw() << "Cannot get the attribute ";
Gtk::TreeModel::iterator iter = _comboBox.get_active();
std::tr1::shared_ptr<Attribute> ptr = (*iter)[_modelColumns.m_ptr];
if ((!_componentSelect.get_visible())
|| (_componentSelect.get_active_row_number() == 0))
return ptr->getBuffer();
//Check if the data actually needs updating
if ((_lastAttribute != ptr.get())
|| (_lastAttributeDataCount != ptr->getUpdateCount())
|| (_lastComponentSelected != _componentSelect.get_active_row_number())
|| _filteredData.empty())
{
_lastAttribute = ptr.get();
_lastAttributeDataCount = ptr->getUpdateCount();
_lastComponentSelected = _componentSelect.get_active_row_number();
std::vector<GLfloat> scalardata;
generateFilteredData(scalardata, ptr, _lastComponentSelected);
_filteredData = scalardata;
}
return _filteredData;
}
virtual void bindAttribute(size_t attrnum, size_t divisor = 1)
{
Gtk::TreeModel::iterator iter = _comboBox.get_active();
if (singleValueMode())
setConstantAttribute(attrnum);
else
{
std::shared_ptr<Attribute> ptr = (*iter)[_modelColumns.m_ptr];
//We have an attribute, check the mode the ComboBox is in,
//and determine if we have to do something with the data!
//Detect if it is in simple pass-through mode
if ((_componentSelect.get_visible())
&& (_componentSelect.get_active_row_number() == 0))
{
ptr->bindAttribute(attrnum, false, divisor);
return;
}
//Check if the data actually needs updating
if ((_lastAttribute != ptr.get())
|| (_lastAttributeDataCount != ptr->getUpdateCount())
|| (_lastComponentSelected != _componentSelect.get_active_row_number())
|| (_lastColorMap != _colorMapSelector.getMode())
|| _filteredData.empty())
{
std::vector<GLfloat> scalardata;
generateFilteredData(scalardata, ptr, _lastComponentSelected);
if (_autoScaling.get_active() && !scalardata.empty())
{
GLfloat min(scalardata[0]), max(scalardata[0]);
for (std::vector<GLfloat>::const_iterator iPtr = scalardata.begin();
iPtr != scalardata.end();
++iPtr)
{
min = std::min(min, *iPtr);
max = std::max(max, *iPtr);
}
_colorMapSelector.setRange(min, max);
}
//Now convert to HSV or whatever
_filteredData.init(4 * scalardata.size(), 4);
GLfloat* data_ptr = _filteredData.map();
for (size_t i(0); i < scalardata.size(); ++i)
_colorMapSelector.map(data_ptr + 4 * i, scalardata[i]);
_filteredData.unmap();
_lastAttribute = ptr.get();
_lastAttributeDataCount = ptr->getUpdateCount();
_lastComponentSelected = _componentSelect.get_active_row_number();
_lastColorMap = _colorMapSelector.getMode();
}
_filteredData.attachToAttribute(attrnum, divisor);
}
}
