inline void generateFilteredData(std::vector<GLfloat>& scalardata,
const std::tr1::shared_ptr<Attribute>& ptr,
size_t mode)
{
//Update the data according to what was selected
scalardata.resize(ptr->num_elements());
const size_t components = ptr->components();
const std::vector<GLfloat>& attrdata = *ptr;
if (mode == 1)
//Magnitude calculation
{
for (size_t i(0); i < scalardata.size(); ++i)
{
scalardata[i] = 0;
for (size_t j(0); j < components; ++j)
{
GLfloat val = attrdata[i * components + j];
scalardata[i] += val * val;
}
scalardata[i] = std::sqrt(scalardata[i]);
}
}
else
{
//Component wise selection
size_t component = mode - 2;
#ifdef COIL_DEBUG
if (component >= components)
M_throw() << "Trying to filter an invalid component";
#endif
for (size_t i(0); i < scalardata.size(); ++i)
scalardata[i] = attrdata[i * components + component];
}
}
