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.. default-domain:: cpp
.. highlight:: cpp
.. namespace:: pugl
################
Creating a World
################
The world is the top-level object which represents an instance of Pugl.
It handles the connection to the window system,
and manages views and the event loop.
An application typically has a single world,
which is constructed once on startup and used to drive the main event loop.
************
Construction
************
A world must be created before any views, and it must outlive all of its views.
The world constructor requires an argument to specify the application type:
.. code-block:: cpp
pugl::World world{pugl::WorldType::program};
For a plugin, specify :enumerator:`WorldType::module` instead.
In some cases, it is necessary to pass additional flags.
For example, Vulkan requires thread support:
.. code-block:: cpp
pugl::World world{pugl::WorldType::program, pugl::WorldFlag::threads};
It is a good idea to set a class name for your project with :func:`World::setClassName`.
This allows the window system to distinguish different applications and,
for example, users to set up rules to manage their windows nicely:
.. code-block:: cpp
world.setClassName("MyAwesomeProject");
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