NodeDeclPtr XmlSceneParser::Impl::PrepareNode (const ParseNode& decl)
{
try
{
//попытка найти параметры в кеше
if (NodeDeclPtr* node_decl_ptr = cache.FindValue<NodeDeclPtr> (decl))
return *node_decl_ptr;
NodeDeclPtr node_decl (new NodeDecl, false);
//парсинг базовых свойств
node_decl->name = get<const char*> (decl, "id", "");
//парсинг точки поворота
if (decl.First ("pivot"))
{
stl::auto_ptr<NodeDecl::Pivot> pivot (new NodeDecl::Pivot);
ParseAttribute (decl, "pivot", pivot->position);
pivot->has_orientation_pivot = strcmp (get<const char*> (decl, "orientation_pivot", "true"), "true") == 0;
pivot->has_scale_pivot = strcmp (get<const char*> (decl, "scale_pivot", "true"), "true") == 0;
node_decl->pivot = pivot;
}
//парсинг трансформаций
node_decl->is_world_transform = strcmp (get<const char*> (decl, "bind_space", "local"), "world") == 0;
if (ParseNode tm_node = decl.First ("transform"))
{
math::mat4f tm;
ParseAttribute (tm_node, "", tm);
affine_decompose (tm, node_decl->position, node_decl->orientation, node_decl->scale);
}
else
{
ParseAttribute (decl, "position", node_decl->position);
ParseAttribute (decl, "scale", node_decl->scale);
if (ParseNode rotation_node = decl.First ("rotation"))
{
float rotation [3] = {0.0f, 0.0f, 0.0f};
ParseAttribute (rotation_node, "", 3, &rotation [0]);
node_decl->orientation = to_quat (degree (rotation [0]), degree (rotation [1]), degree (rotation [2]));
}
else
{
ParseAttribute (decl, "orientation", node_decl->orientation);
}
}
node_decl->orientation_inherit = strcmp (get<const char*> (decl, "orientation_inherit", "true"), "true") == 0;
node_decl->scale_inherit = strcmp (get<const char*> (decl, "scale_inherit", "true"), "true") == 0;
//парсинг пользовательских свойств
PropertyMap* properties = 0;
if (decl.First ("property"))
node_decl->properties.reset (properties = new PropertyMap);
for (Parser::NamesakeIterator iter = decl.First ("property"); iter; ++iter)
{
ParseNode property_decl = *iter;
const char* name = get<const char*> (property_decl, "name");
PropertyType type = get_property_type (property_decl.First ("type"));
size_t property_index = properties->AddProperty (name, type, 1);
stl::string value = get<const char*> (property_decl, "value");
properties->SetProperty (property_index, value.c_str ());
}
//парсинг after node
if (ParseNode before_node_decl = decl.First ("before_node"))
{
node_decl->before_node.reset (new stl::string);
*node_decl->before_node = get<const char*> (before_node_decl, "");
}
//парсинг привязки к родителю
if (ParseNode parent_name_decl = decl.First ("parent"))
{
node_decl->parent_name.reset (new stl::string);
*node_decl->parent_name = get<const char*> (parent_name_decl, "");
}
//регистрация дескриптора узла
cache.SetValue (decl, node_decl);
return node_decl;
}
catch (xtl::exception& e)
{
e.touch ("scene_graph::XmlSceneParser::Impl::PrepareNode");
throw;
}
}
