/*!
\page usdAppUtils_page_front UsdAppUtils: USD Application Utilities
\if ( PIXAR_MFB_BUILD )
\mainpage  UsdAppUtils: USD Application Utility Libraries
\publicLib
\endif

\section usdAppUtils_overview Overview

UsdAppUtils contains a number of utilities and common functionality for
applications that view and/or record images of USD stages.

There are a handful of modules provided for adding common and consistent
command-line arguments to tools that operate on USD:

\li \b cameraArgs allows adding arguments for specifying the camera to operate
    on.

\li \b colorArgs allows adding arguments for setting the type of color
    correction to be applied when generating images using Hydra.

\li \b complexityArgs allows adding arguments for specifying the level of
    refinement to use for the geometry being displayed.

\li \b framesArgs allows adding arguments for specifying which frames the
    application should operate on. This module also provides support for
    working with \ref UsdAppUtils_frame_format_strings.

\li \b rendererArgs allows adding arguments for specifying which renderer
    plugin to use when generating images using Hydra.

\subsection UsdAppUtils_frame_format_strings Frame Format Strings

A frame format string is a string that is expected to vary with time and
contains a frame placeholder that should be replaced with actual frame
numbers, producing a complete, formatted frame string.

A frame placeholder must be composed of exactly one or two groups of one or
more hashes ('#'), and if there are two, they must be separated by a dot
('.').

The hashes after the dot indicate the floating point precision to use in
the frame numbers inserted into the frame format string. If there is only
a single group of hashes, the precision is zero and the inserted frame
numbers will be integer values.

The overall width of the frame placeholder specifies the minimum width to
use when inserting frame numbers into the frame format string. Formatted
frame numbers smaller than the minimum width will be zero-padded on the
left until they reach the minimum width.

For example, the frame format string 'image.#.exr' over the frame
range from 101 to 103 would result in the following formatted frame
strings:

    image.101.exr
    image.102.exr
    image.103.exr

The frame format string 'image.###.#.exr' over the frame range from
1 to 3 would result in the following formatted frame strings:

    image.001.0.exr
    image.002.0.exr
    image.003.0.exr

*/