icetWallTime -- timer function
Retrieves the current time, in seconds. The returned values of
icetWallTime are only valid in relation to each other. That is, the
time may or may not have anything to do with the current date or time.
However, the difference of values between two calls to icetWallTime is
the elapsed time in seconds between the two calls. Thus, icetWallTime
is handy for determining the running time of various subprocesses.
icetWallTime is used internally for determining the values for the
state variables ICET_BUFFER_READ_TIME, ICET_BUFFER_WRITE_TIME,
ICET_RENDER_TIME, and ICET_TOTAL_DRAW_TIME.
The current time, in seconds.
Copyright (C)2003 Sandia Corporation
Under the terms of Contract DE-AC04-94AL85000 with Sandia
Corporation, the U.S. Government retains certain rights in this
This source code is released under the New BSD License.