+ const lisp::Lisp* tiles_lisp = root->get_lisp("supertux-tiles");
+ if(!tiles_lisp)
+ throw std::runtime_error("file is not a supertux tiles file.");
+
+ lisp::ListIterator iter(tiles_lisp);
+ while(iter.next()) {
+ if(iter.item() == "tile") {
+ Tile* tile = new Tile();
+ tile->parse(*(iter.lisp()));
+ while(tile->id >= tiles.size()) {
+ tiles.push_back(0);
+ }
+ if(tiles[tile->id] != 0) {
+ log_warning << "Tile with ID " << tile->id << " redefined" << std::endl;
+ }
+ tiles[tile->id] = tile;
+ } else if(iter.item() == "tilegroup") {
+ TileGroup tilegroup;
+ const lisp::Lisp* tilegroup_lisp = iter.lisp();
+ tilegroup_lisp->get("name", tilegroup.name);
+ tilegroup_lisp->get_vector("tiles", tilegroup.tiles);
+ tilegroups.insert(tilegroup);
+ } else if (iter.item() == "tiles") {
+ // List of ids (use 0 if the tile should be ignored)
+ std::vector<unsigned int> ids;
+ // List of attributes of the tile
+ std::vector<unsigned int> attributes;
+ std::string image;
+
+ // width and height of the image in tile units, this is used for two
+ // purposes:
+ // a) so we don't have to load the image here to know its dimensions
+ // b) so that the resulting 'tiles' entry is more robust,
+ // ie. enlarging the image won't break the tile id mapping
+ // FIXME: height is actually not used, since width might be enough for
+ // all purposes, still feels somewhat more natural this way
+ unsigned int width = 0;
+ unsigned int height = 0;
+
+ iter.lisp()->get_vector("ids", ids);
+ iter.lisp()->get_vector("attributes", attributes);
+ iter.lisp()->get("image", image);
+ iter.lisp()->get("width", width);
+ iter.lisp()->get("height", height);
+
+ if (ids.size() != attributes.size())