Slew

note

Click here for documentation on slew for each movement in EZ-Template!

Slew Class

slew()

Creates a slew object with constants. Robot will start at min_speed and ramp up to full speed (127) once distance is traveled, capped at the movement's maximum speed.

distance distance to travel until full speed (127) is reached. The ramp rate does not depend on the movement's maximum speed.
minimum_speed starting speed.

Prototype

ez::slew lift_Slew(100, 60);

Example

slew(double distance, int minimum_speed);

constants_set()

Sets slew constants.

distance distance to travel until full speed (127) is reached. The ramp rate does not depend on the movement's maximum speed.
minimum_speed starting speed.

Prototype

ez::slew lift_slew;
void initialize() {
  lift_slew.constants_set(100, 50);
}

Example

void constants_set(double distance, int minimum_speed);

initialize()

Setup for slew. Keeps track of where the starting sensor value is and what the maximum target speed is.

enabled true if you want slew to run, false if you don't.
maximum_speed the most speed slew is allowed to output for this movement. This caps the output, it does not change how fast slew ramps up.
target the target position for the movement.
current the current sensor value.

Prototype

ez::slew lift_slew;
pros::Motor lift(1);
void initialize() {
  lift_slew.constants_set(100, 50);
  lift_slew.initialize(true, 127, 500, lift.get_position());
}

Example

void initialize(bool enabled, double maximum_speed, double target, double current);

iterate()

Iterates slew calculation and returns what the current max speed should be.

current the current sensor value.

Prototype

ez::slew lift_slew;
pros::Motor lift(1);
void initialize() {
  lift_slew.constants_set(100, 50);
  lift_slew.initialize(true, 127, 500, lift.get_position());
}

void autonomous() {
  while (lift.get_position() <= 500) {
    lift = lift_slew.iterate(lift.get_position());
    pros::delay(10);
  }
  lift = 0;
}

Example

double iterate(double current);

output()

Returns what the current max speed should be.

Prototype

ez::slew lift_slew;
pros::Motor lift(1);
void initialize() {
  lift_slew.constants_set(100, 50);
  lift_slew.initialize(true, 127, 500, lift.get_position());
}

void autonomous() {
  while (lift.get_position() <= 500) {
    lift_slew.iterate(lift.get_position());
    lift = lift_slew.output();
    pros::delay(10);
  }
  lift = 0;
}

Example

double output();

enabled()

Returns if slew is currently active or not.

Prototype

ez::slew lift_slew;
pros::Motor lift(1);
void initialize() {
  lift_slew.constants_set(100, 50);
  lift_slew.initialize(true, 127, 500, lift.get_position());
}

void autonomous() {
  printf("Slew Enabled? %i\n", lift_slew.enabled()); // Returns true
  while (lift.get_position() <= 500) {
    lift_slew.iterate(lift.get_position());
    lift = lift_slew.output();
    pros::delay(10);
  }
  lift = 0;
  printf("Slew Enabled? %i\n", lift_slew.enabled()); // Returns false
}

Example

bool enabled();

speed_max_set()

Sets the max speed slew can be.

speed maximum speed the output can be

Prototype

ez::slew lift_slew;
pros::Motor lift(1);
void initialize() {
  lift_slew.constants_set(100, 50);
  lift_slew.initialize(true, 127, 500, lift.get_position());
}

void autonomous() {
  while (lift.get_position() <= 500) {
    if (lift.get_position() < 100) 
      lift_slew.speed_max_set(50);
    else 
      lift_slew.speed_max_set(127);
    lift_slew.iterate(lift.get_position());
    lift = lift_slew.output();
    pros::delay(10);
  }
  lift = 0;
}

Example

void speed_max_set(double speed);

speed_max_get()

Returns the max speed slew can be.

Prototype

ez::slew lift_slew;
pros::Motor lift(1);
void initialize() {
  lift_slew.constants_set(100, 50);
  lift_slew.initialize(true, 127, 500, lift.get_position());
}

void autonomous() {
  while (lift.get_position() <= 500) {
    if (lift.get_position() < 100) 
      lift_slew.speed_max_set(50);
    else 
      lift_slew.speed_max_set(127);
    printf("%.2f", lift_slew.speed_max_get());

    lift_slew.iterate(lift.get_position());
    lift = lift_slew.output();
    pros::delay(10);
  }
  lift = 0;
}

Example

double speed_max_get();