void print_once(string msg, ...)
Prints the string passed to the function exactly one time, even in a loop. This is useful to print a message before the first iteration of a loop, without having to count iterations.
The string to print. This string does support interpolating values. Use sprintf to generate the msg string if you need to include values.
Normally, multiple instances of
print_once() call sites
will work independently of each other. That is, if two separate
call sites to
print_once() are passed the same string, the string will be
printed twice (once per call site). With the “global” flag turned on, strings
are checked across all instances of the
// Only print "Hello world" one time for (int i = 0; i < 100; ++i) print_once("Hello world\n"); // Print a missing texture warning, just one time across all shaders print_once( sprintf("Missing texture map: %s\n", texture_map), "global", 1);