Get the horizontal velocity of a whole group of particles.



参数 描述
group The particle group to get.

返回: Real(实数)


With this function you can retrieve the horizontal velocity of a group of particles. The group value is that which was returned when you created the group of particles using the function physics_particle_group_end, and the function will return a value which is the combined value of the currently set flags.


vx = physics_particle_group_get_vel_x(group1);
vy = physics_particle_group_get_vel_y(group1);

The above code will get the horizontal and vertical velocity of the particle group indexed in the variable "group1" and store them in variables.

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