DatasetReference StaticGeometryHandler::load_dataset(const Filename &src) {
// TODO: Check for duplicates
// for (DatasetList::const_iterator iter = _datasets.cbegin(); iter != _datasets.cend(); ++iter) {
// }
ifstream infile(src.get_fullpath(), ios::in | ios::binary | ios::ate);
if (!infile.is_open()) {
cout << "ERROR: Could not open " << src.get_fullpath() << "!" << endl;
return -1;
}
// Extract filesize and reset filepointer afterwards
size_t fsize = infile.tellg();
infile.seekg(0, ios::beg);
// Read file content
char *data = new char[fsize];
infile.read(data, fsize);
// Construct datagram and an iterator from file content
Datagram dg(data, fsize);
DatagramIterator dgi(dg);
// For now we assume the file is structured correctly, and the header is
// correct aswell
string header = dgi.get_fixed_string(4);
size_t tri_group_size = dgi.get_uint32();
if (tri_group_size != SG_TRI_GROUP_SIZE) {
cout << "ERROR: The rpsg file uses a tri-group size of " << tri_group_size << ", but expected"
<< " a size of "<< SG_TRI_GROUP_SIZE << endl;
cout << "Please regenerate the file!" << endl;
delete [] data;
return -1;
}
size_t num_strips = dgi.get_uint32();
if (num_strips >= SG_MAX_DATASET_STRIPS) {
cout << "ERROR! Dataset exceeds maximum amount of " << SG_MAX_DATASET_STRIPS << " strips (has " << num_strips << ")!" << endl;
delete [] data;
return -1;
}
SGDataset *dataset = new SGDataset();
dataset->read_bounds(dgi);
// Read in all strips and store them
PTA_uchar dataset_handle = _dataset_tex->modify_ram_image();
for (size_t i = 0; i < num_strips; ++i) {
SGTriangleStrip* strip = new SGTriangleStrip();
strip->load_from_datagram(dgi);
strip->write_to(dataset_handle, _dataset_index++);
dataset->attach_strip(strip);
}
PTA_uchar mapping_handle = _mapping_tex->modify_ram_image();
dataset->write_mappings(mapping_handle, _datasets.size());
if (dgi.get_remaining_size() != 0) {
cout << "Corrupt RPSG file! " << dgi.get_remaining_size() << " bytes left!" << endl;
}
// Write out debug textures?
// _dataset_tex->write("dataset.png");
// _mapping_tex->write("mappings.png");
// Attach dataset, clean up the variables, and finally return a handle to the dataset
_datasets.push_back(dataset);
delete [] data;
return _datasets.size() - 1;
}
