/* ----------------------------------------------------------------------------
* Emits the particles, regardless of the timer.
* manager: The particle manager to place these particles on.
*/
void particle_generator::emit(particle_manager &manager) {
size_t final_nr =
max(
0,
(int) number +
randomi((int) (0 - number_deviation), (int) number_deviation)
);
for(size_t p = 0; p < final_nr; ++p) {
particle new_p = base_particle;
new_p.duration =
max(
0.0f,
new_p.duration +
randomf(-duration_deviation, duration_deviation)
);
new_p.time = new_p.duration;
new_p.friction +=
randomf(-friction_deviation, friction_deviation);
new_p.gravity +=
randomf(-gravity_deviation, gravity_deviation);
new_p.x +=
randomf(-x_deviation, x_deviation);
new_p.y +=
randomf(-y_deviation, y_deviation);
new_p.size =
max(
0.0f,
new_p.size +
randomf(-size_deviation, size_deviation)
);
//For speed, let's decide if we should use
//(speed_x and speed_y) or (speed and angle).
//We'll use whichever one is not all zeros.
if(angle != 0 || speed != 0) {
angle_to_coordinates(
angle + randomf(-angle_deviation, angle_deviation),
speed + randomf(-speed_deviation, speed_deviation),
&new_p.speed_x, &new_p.speed_y
);
} else {
new_p.speed_x +=
randomf(-speed_x_deviation, speed_x_deviation);
new_p.speed_y +=
randomf(-speed_y_deviation, speed_y_deviation);
}
manager.add(new_p);
}
}
/* ----------------------------------------------------------------------------
* Returns the values of the coordinates, magnitude, and angle,
* but "cleaned" up.
* All parameters are mandatory.
*/
void movement_struct::get_clean_info(
point* coords, float* angle, float* magnitude
) {
get_raw_info(coords, angle, magnitude);
*magnitude =
clamp(*magnitude, joystick_min_deadzone, joystick_max_deadzone);
*magnitude =
interpolate_number(
*magnitude,
joystick_min_deadzone, joystick_max_deadzone,
0.0f, 1.0f
);
*coords = angle_to_coordinates(*angle, *magnitude);
}
