|ind||The index of the particle system to update.|
This function will advance the given particle system one step in
game time and can be used to simulate the particle system behaviour
when automatic updating is off, or it can be used to advance a
particle system to a specific point all in one step. For example,
if you have a particle system for snow, and you want it to appear
that the snow is falling right from the moment the player enters
the room then you may wish to advance your snow particles for a few
seconds in the create event of an instance so that the first time
they are drawn, there are particles all over the screen (the code
example below shows this). You can also use this function when
automatic updating of the system is switched off by the function
to move the system along.
repeat (room_speed * 3)
The above code will advance the particle system indexed in the global variable "RainSys" by 3 seconds.