|ind||The index of the particle system to check for.|
With this function you can check to see if the given particle
system indexed exists in the game or not. Note that if the variable
being checked is an uninitialised variable (that a particle system
would otherwise have its index assigned to) this will throw an
global.Sname = part_system_create();
the above code checks to see if the particle system referenced in the global variable exists and if it does not it is created.