physics_particle_group_count

This function will return the number of particles that are active in a single group. The group index (ID) is the value that is returned when you call the function physics_particle_group_end().

Syntax:

physics_particle_group_count(group)

Returns:

Real

Example:

gp_num = physics_particle_group_count(group1);

The above code will get the number of particles used to make the group indexed in the variable "group1" and store the value in a variable.