OpenGL::Simple::Viewer

OpenGL::Simple::Viewer is a Perl module designed to bring a straightforward OpenGL geometry viewer to your fingertips. This is achieved through the popular GLUT library. With this module, you can create an instance of OpenGL::Simple::Viewer to open a GLUT window, allowing you to easily render some geometry provided through a callback subroutine.

The great thing about this module is that you can rotate, translate, and zoom the geometry using your mouse. As you move around, the window needs to be redrawn with the updated changes. By default, the module takes care of everything for you, clearing the window, redrawing the background, setting the correct position and orientation, and then rendering the geometry.

You only need to supply a single subroutine that draws the geometry, which makes everything even more accessible. The callback function for setting the background can also be defined in your code. This further allows you to personalize your viewing experience.

Using OpenGL::Simple::Viewer is really easy. All you need to do is include the following lines in your code:

```perl
use OpenGL::Simple::Viewer;
use OpenGL::Simple::GLUT qw(:all);
glutInit;
my $v = new OpenGL::Simple::Viewer(
draw_geometry => sub { glutSolidTeapot(1.0); }
);
glutMainLoop;
```

Where `draw_geometry` is the function that defines what geometry you want to display. Overall, OpenGL::Simple::Viewer is a great tool for those looking for an effortless way to view and manipulate 3D geometry.