Ojo

Introducción

El sensor ocular VR puede detectar objetos e identificar su color, brillo y tono. También permite ajustar el rango de detección y la configuración de iluminación para obtener lecturas más precisas.

A continuación se muestra una lista de todos los métodos disponibles:

Obtenedores: leen la presencia de objetos, color, brillo, tono, RGB y estado del sensor.

• near_object – Returns whether or not a detected object is near the Eye Sensor.

• detect – Returns a Boolean indicating if the Eye Sensor detects the selected color.

• brightness – Returns the brightness of a detected object.

Devolución de llamada: ejecuta el código cuando se detecta o se pierde un objeto.

• object_detected – Calls a function when an object is detected.

• object_lost – Calls a function when an object is lost.

Captadores

near_object

near_object returns a Boolean indicating whether or not the Eye Sensor is nearby an object.

• True – The sensor is near an object.

• False – The sensor is not near an object.

Usage:
eye.near_object()

Parámetros	Descripción
	Este método no tiene parámetros.

def main():
    # Stop driving when Eye Sensor is 
    # near an object
    drivetrain.drive(FORWARD)
    while True:
        if front_eye.near_object():
            drivetrain.stop()
        wait(5, MSEC)

# VR threads — Do not delete
vr_thread(main)

detect

detect returns a Boolean indicating whether or not the selected color is detected by the Eye Sensor.

• True – The sensor detects the color.

• False – The sensor does not detect the color.

Usage:
eye.detect(color)

Parámetros	Descripción
color	The color for the Eye Sensor to check for: BLUE GREEN NONE RED

def main():
    # Stop the robot if the Eye Sensor 
    # detects red
    drivetrain.turn(RIGHT)
    while True:
        if front_eye.detect(RED):
            drivetrain.stop()
        wait(5, MSEC)

# VR threads — Do not delete
vr_thread(main)

brightness

brightness returns the brightness detected by the Eye Sensor as a percent from 0 to 100.

Usage:
eye.brightness(units)

Parámetros	Descripción
units	The unit that represents the brightness: PERCENT

Llamar de vuelta

object_detected

object_detected registers a callback function for when an object is detected.

Usage:
eye.object_detected(callback)

Parámetros	Descripción
callback	Una función que se define previamente para ejecutarse cuando cambia el valor del eje.

def detected():
    # Display a message
    drivetrain.stop()
    brain.print("object detected")
    wait(0.5,SECONDS)
    brain.clear()

def main():
    # Drive until an object is detected
    drivetrain.drive(FORWARD)
    front_eye.object_detected(detected)

# VR threads — Do not delete
vr_thread(main)

object_lost

object_lost registers a callback function for when an object is lost.

Usage:
eye.object_lost(callback)

Parámetros	Descripción
callback	Una función que se define previamente para ejecutarse cuando cambia el valor del eje.

def lost():
    # Display a message
    drivetrain.stop()
    brain.print("object lost")
    wait(0.5,SECONDS)
    brain.clear()

def main():
    # Back away from an object
    drivetrain.drive(REVERSE)
    front_eye.object_lost(lost)

# VR threads — Do not delete
vr_thread(main)