//! Read points from file. May throw.
static void
points(const std::string &file_name,
std::vector<las::point> &points,
public_header_block *phb_ptr = 0,
std::vector<variable_length_record> *vlr_ptr = 0)
{
las::ifstream ifs(file_name); // May throw.
public_header_block phb;
// TODO: set strings to null!
_read_public_header_block(ifs.stream(), phb); // May throw.
if (0 != phb_ptr) {
*phb_ptr = phb;
}
_read_variable_length_records(ifs.stream(), phb, vlr_ptr); // May throw.
_read_point_data_start_signature(ifs.stream()); // May throw.
_read_points(ifs.stream(), phb, points); // May throw.
}
bool
Lwo2::ReadFile( const string& filename )
{
OSG_INFO << "Opening file: " << filename << std::endl;
_fin.open(filename.c_str(), ios::in | ios::binary );
if (!_fin.is_open())
{
OSG_INFO << "Can't open file '" << filename << "'" << std::endl;
return false;
}
// checking EA-IFF85 format
// http://www.lightwave3d.com/developer/75lwsdk/docs/filefmts/eaiff85.html
if (_read_uint() != tag_FORM)
{
OSG_INFO << "File '" << filename << "' is not IFF format file." << std::endl;
_fin.close();
return false;
}
else
{
OSG_INFO << "Detected EA-IFF85 format" << std::endl;
}
unsigned int form_size = _read_uint();
OSG_INFO << "Form size: " << form_size << std::endl;
// checking LWO2 format
// http://www.lightwave3d.com/developer/75lwsdk/docs/filefmts/lwo2.html
if (_read_uint() != tag_LWO2)
{
unsigned long make_id(const char*);
OSG_INFO << "File '" << filename << "' is not LWO2 format file." << std::endl;
_fin.close();
return false;
}
else
{
OSG_INFO << "Detected LWO2 format" << std::endl;
}
unsigned long read_bytes = 4;
unsigned long current_tag_name;
unsigned long current_tag_size;
// main loop for reading tags
while (read_bytes < form_size && !_fin.eof())
{
current_tag_name = _read_uint();
current_tag_size = _read_uint();
read_bytes += 8 + current_tag_size + current_tag_size % 2;
_print_tag(current_tag_name, current_tag_size);
if (current_tag_name == tag_TAGS)
{
_read_tag_strings(current_tag_size);
}
else if (current_tag_name == tag_LAYR)
{
_read_layer(current_tag_size);
}
else if (current_tag_name == tag_PNTS)
{
_read_points(current_tag_size);
}
else if (current_tag_name == tag_VMAP)
{
_read_vertex_mapping(current_tag_size);
}
else if (current_tag_name == tag_VMAD)
{
_read_polygons_mapping(current_tag_size);
}
else if (current_tag_name == tag_POLS)
{
_read_polygons(current_tag_size);
}
else if (current_tag_name == tag_PTAG)
{
_read_polygon_tag_mapping(current_tag_size);
}
else if (current_tag_name == tag_CLIP)
{
_read_image_definition(current_tag_size);
}
else if (current_tag_name == tag_SURF)
{
_read_surface(current_tag_size);
}
else
{
_fin.seekg(current_tag_size + current_tag_size % 2, ios::cur);
}
}
_fin.close();
return _successfully_read = true;
}