| The ROBOTC Natural Language Library aims at making learning and using text-based programming languages easier for beginners. The Natural Language Library is filled with commands that are both easy to use and easy to remember. Natural Language commands encompass entire robot behaviors into a single command.
Natural Language can be enabled in ROBOTC by going to the Robot menu, then Platform Type, and then by selecting one of the Natural Language options.
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| void moveStraightForTime(float seconds = 5.0, tMotor rightEncoderPort = dgtl1, tMotor leftEncoderPort = dgtl3)
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(void) The robot will use encoders to maintain a straight course for a length of time in seconds.
- NOTE: This function only supports moving forward and only at one speed setting. Future implementations may include moving backwards and variable speeds.
Acceptable Sensors: digital ports 1 through 11 (and your names for them given in Motors and Sensors Setup.)
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| Parameter
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Explanation
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Acceptable Input
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| seconds
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The amount of time in seconds to drive straight forward. (default: 5.0)
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Any floating point amount:
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| 0.####
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0.0000 to +2,048.0000
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| 0.###
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0.000 to +32,768.000
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| 0.##
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0.00 to +262,144.00
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| 0.#
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0.0 to +2,097,200.0
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| rightEncoderPort
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The right-side motor encoder. (default: dgtl1 [+ dgtl2])
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dgtl1 to dgtl11 Or their names setup in Motors and Sensors Setup.
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| leftEncoderPort
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The left-side motor encoder. (default: dgtl3 [+ dgtl4])
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dgtl1 to dgtl11 Or their names setup in Motors and Sensors Setup.
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| Default Usage and Sample
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moveStraightForTime(); /* move straight forward for 5.0 seconds,
using dgtl1 (+ dgtl2) as the right-side encoder and
dgtl3 (+ dgtl4) as the left-side encoder (default) */
stop();
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| Usage and Sample with Parameters
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moveStraightForTime(7.5, dgtl5, dgtl3); /* move straight forward for 7.5 seconds,
using dgtl5 (+ dgtl6) as the right-side encoder
and dgtl3 (+ dgtl4) as the left-side encoder */
stop(); // stop
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| void moveStraightForRotations(float rotations = 1.0, tMotor rightEncoderPort = dgtl1, tMotor leftEncoderPort = dgtl3)
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(void) The robot will use encoders to maintain a straight course for a distance in rotations (360 encoder counts = 1 rotation).
- NOTE: This function only supports moving forward and only at one speed setting. Future implementations may include moving backwards and variable speeds.
Acceptable Sensors: digital ports 1 through 11 (and your names for them given in Motors and Sensors Setup.)
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| Parameter
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Explanation
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Acceptable Input
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| rotations
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The amount of axle rotations to drive straight forward. (default: 1.0)
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Any floating point amount:
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| 0.####
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-2,048.0000 to +2,048.0000
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| 0.###
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-32,768.000 to +32,768.000
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| 0.##
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-262,144.00 to +262,144.00
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| 0.#
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-2,097,200.0 to +2,097,200.0
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| rightEncoderPort
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The right-side motor encoder. (default: dgtl1 [+ dgtl2])
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dgtl1 to dgtl11 Or their names setup in Motors and Sensors Setup.
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| leftEncoderPort
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The left-side motor encoder. (default: dgtl3 [+ dgtl4])
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dgtl1 to dgtl11 Or their names setup in Motors and Sensors Setup.
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| Default Usage and Sample
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moveStraightForRotations(); /* move straight forward for 1.0 rotations,
using dgtl1 (+ dgtl2) as the right-side encoder and
dgtl3 (+ dgtl4) as the left-side encoder (default) */
stop();
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| Usage and Sample with Parameters
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moveStraightForRotations(4.95, dgtl5, dgtl3); /* move straight forward for 4.95 rotations,
using dgtl5 (+ dgtl6) as the right-side encoder
and dgtl3 (+ dgtl4) as the left-side encoder */
stop(); // stop
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| void tankControl(TVexJoysticks rightJoystick = Ch2, TVexJoysticks leftJoystick = Ch3, short threshold = 10)
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(void) The robot will be remote controlled in such a way that the left motor is mapped to the left joystick and the right motor is mapped to the right joystick.
- NOTE: This function only supports 2 channels and works best with the joystics.
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| Parameter
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Explanation
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Acceptable Input
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| rightJoystick
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The joystick to use as the RIGHT-side joystick. (default: Ch2)
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Any channel: Ch1 Ch2 Ch3 Ch4
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| leftJoystick
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The joystick to use as the LEFT-side joystick. (default: Ch3)
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Any channel: Ch1 Ch2 Ch3 Ch4
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| threshold
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This variable eliminates 'noise' caused by joysticks not returning back to the exact center. (default: 10)
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0 to 127
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| Default Usage and Sample
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while(true)
{
tankControl(); /* control the robot in 'tank' fashion
with the RIGHT joystick as Ch2 and
the LEFT joystick as Ch1, with a
threshold of 10 (default) */
}
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| Usage and Sample with Parameters
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while(true)
{
tankControl(Ch1, Ch4, 5); /* control the robot in 'tank' fashion
with the RIGHT joystick as Ch1 and
the LEFT joystick as Ch2, with a
threshold of 5 */
}
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| void arcadeControl(TVexJoysticks verticalJoystick = Ch2, TVexJoysticks horizontalJoystick = Ch1, short threshold = 10)
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(void) The robot will be remote controlled in such a way that the movement of the robot is mapped to a single joystick, much like a retro arcade game.
- NOTE: This function only supports 2 channels and works best with the joystics.
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| Parameter
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Explanation
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Acceptable Input
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| verticalJoystick
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The joystick to use as the VERTICAL joystick. (default: Ch2)
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Any channel: Ch1 Ch2 Ch3 Ch4
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| horizontalJoystick
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The joystick to use as the HORIZONTAL joystick. (default: Ch1)
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Any channel: Ch1 Ch2 Ch3 Ch4
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| threshold
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This variable eliminates 'noise' caused by joysticks not returning back to the exact center. (default: 10)
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0 to 127
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| Default Usage and Sample
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while(true)
{
arcadeControl(); /* control the robot in 'arcade' fashion
with the VERTICAL joystick as Ch2
and the HORIZONTAL joystick as Ch1,
with a threshold of 10 (default) */
}
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| Usage and Sample with Parameters
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while(true)
{
arcadeControl(Ch3, Ch4, 5); /* control the robot in 'arcade' fashion
with the VERTICAL joystick as Ch3
and the HORIZONTAL joystick as Ch4,
with a threshold of 5 */
}
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| void untilBump(tSensors sensorPort = dgtl6, int delayTimeMS = 10)
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(void) The robot does what it was doing until the touch sensor is pressed in and then released out. A delay time in milliseconds can be specified.
Acceptable Sensors: digital ports 1 through 12 (and your names for them given in Motors and Sensors Setup.)
Acceptable Range for Delay Time:
0 to 2,147,483,647.
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| Parameter
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Explanation
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Acceptable Input
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| sensorPort
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The sensor port to use for the light sensor. (default: dgtl6)
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dgtl1 to dgtl12 Or their names setup in Motors and Sensors Setup.
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| delayTimeMS
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The amount of milliseconds that MUST PASS between press and release of the sensor for it to count. (default: 10)
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Any whole integer amount from 0 to 2,147,483,647.
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| Default Usage and Sample
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forward();
untilBump(); /* wait until the touch sensor in port dgtl6 is pressed and
then released with a delay time of 10 milliseconds (default) */
stop();
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| Usage and Sample with Parameters
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forward(63); // go forward at speed 63
untilBump(dgtl10, 100); /* wait until the touch sensor in port dgtl10 is pressed and
then released with a delay time of 100 milliseconds */
stop(); // stop
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| void untilSonarGreaterThan(short distance = 30, tSensors sensorPort = dgtl8)
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(void) The robot does what it was doing until the sonar sensor reads a value greater than a set distance in centimeters.
Range: 0 to 647 (A value of -1 means it cannot detect anything.)
Acceptable Sensors: digital ports 1 through 11 (and your names for them given in Motors and Sensors Setup.)
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| Parameter
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Explanation
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Acceptable Input
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| distance
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The distance in centimeters that an object must be farther than to count (default: 30)
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Any whole integer amount from 0 to 647.
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| sensorPort
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The sensor port to use for the sonar sensor. (default: dgtl8 [+ dgtl9])
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dgtl1 to dgtl11 Or their names setup in Motors and Sensors Setup.
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| Default Usage and Sample
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forward();
untilSonarGreaterThan(); /* wait until the sonar sensor in port dgtl8 (+ dgtl9)
detects an object farther than 30cm away (default) */
stop();
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| Usage and Sample with Parameters
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forward(63); // go forward at speed 63
untilSonarGreaterThan(45, dgtl2); /* wait until the sonar sensor in port dgtl2 (+ dgtl3)
detects an object farther than 45cm away */
stop(); // stop
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| void untilSonarLessThan(short distance = 30, tSensors sensorPort = dgtl8)
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(void) The robot does what it was doing until the sonar sensor reads a value less than a set distance in centimeters.
Range: 0 to 647 (A value of -1 means it cannot detect anything.)
Acceptable Sensors: digital ports 1 through 11 (and your names for them given in Motors and Sensors Setup.)
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| Parameter
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Explanation
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Acceptable Input
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| distance
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The distance in centimeters that an object must be farther than to count (default: 30)
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Any whole integer amount from 0 to 647.
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| sensorPort
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The sensor port to use for the sonar sensor. (default: dgtl8 [+ dgtl9])
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dgtl1 to dgtl11 Or their names setup in Motors and Sensors Setup.
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| Default Usage and Sample
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forward();
untilSonarLessThan(); /* wait until the sonar sensor in port dgtl8 (+ dgtl 9)
detects an object closer than 30cm away (default) */
stop();
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| Usage and Sample with Parameters
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forward(63); // go forward at speed 63
untilSonarLessThan(45, dgtl2); /* wait until the sonar sensor in port dgtl2 (+ dgtl3)
detects an object closer than 45cm away */
stop(); // stop
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| void untilPotentiometerGreaterThan(int position = 2048, tSensors sensorPort = in6)
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(void) The robot does what it was doing until the potentiometer sensor reads a value greater than a set position.
Range: 0 to 4095 (However due to mechanical stops, you may be limited to the range of 5 to 4090.)
Acceptable Sensors: analog ports 1 through 8 (and your names for them given in Motors and Sensors Setup.)
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| Parameter
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Explanation
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Acceptable Input
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| position
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The function passes if the rotation is greater than this value (default: 2048)
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Any whole integer amount from 0 to 4095.
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| sensorPort
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The sensor port to use for the sonar sensor. (default: in6)
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in1 to in8 Or their names setup in Motors and Sensors Setup.
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| Default Usage and Sample
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forward();
untilPotentiometerGreaterThan(); /* wait until the potentiometer in port in6
reads a value greater than 2048 (default) */
stop();
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| Usage and Sample with Parameters
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forward(63); // go forward at speed 63
untilPotentiometerGreaterThan(40, in4); /* wait until the potentiometer in port in4
reads a value greater than 40 (default) */
stop(); // stop
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| void untilPotentiometerLessThan(int position = 2048, tSensors sensorPort = in6)
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(void) The robot does what it was doing until the potentiometer sensor reads a value less than a set position.
Range: 0 to 4095 (However due to mechanical stops, you may be limited to the range of 5 to 4090.)
Acceptable Sensors: analog ports 1 through 8 (and your names for them given in Motors and Sensors Setup.)
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| Parameter
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Explanation
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Acceptable Input
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| position
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The function passes if the rotation is less than this value (default: 2048)
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Any whole integer amount from 0 to 4095.
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| sensorPort
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The sensor port to use for the sonar sensor. (default: in6)
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in1 to in8 Or their names setup in Motors and Sensors Setup.
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| Default Usage and Sample
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forward();
untilPotentiometerLessThan(); /* wait until the potentiometer in port in6
reads a value less than 2048 (default) */
stop();
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| Usage and Sample with Parameters
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forward(63); // go forward at speed 63
untilPotentiometerLessThan(40, in4); /* wait until the potentiometer in port in4
reads a value less than 40 (default) */
stop(); // stop
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| void untilLight(int threshold = 505, tSensors sensorPort = in2)
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(void) The robot does what it was doing until the light sensor reads a value lighter than the threshold.
Range: (light) 0 to 4095 (dark)
Acceptable Sensors: analog ports 1 through 8 (and your names for them given in Motors and Sensors Setup.)
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| Parameter
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Explanation
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Acceptable Input
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| threshold
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The threshold value that an object must be lighter than to count (default: 505)
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Any whole integer amount from 0 to 4095.
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| sensorPort
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The sensor port to use for the sonar sensor. (default: in2)
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in1 to in8 Or their names setup in Motors and Sensors Setup.
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| Default Usage and Sample
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forward();
untilLight(); /* wait until the light sensor in port in2
detects an object lighter than 505 (default) */
stop();
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| Usage and Sample with Parameters
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forward(63); // go forward at speed 63
untilLight(1005, in4); /* wait until the light sensor in port in4
detects an object lighter than 1005 */
stop(); // stop
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| void untilDark(int threshold = 505, tSensors sensorPort = in2)
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(void) The robot does what it was doing until the light sensor reads a value darker than the threshold.
Range: (light) 0 to 4095 (dark)
Acceptable Sensors: analog ports 1 through 8 (and your names for them given in Motors and Sensors Setup.)
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| Parameter
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Explanation
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Acceptable Input
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| threshold
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The threshold value that an object must be darker than to count (default: 505)
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Any whole integer amount from 0 to 4095.
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| sensorPort
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The sensor port to use for the sonar sensor. (default: in2)
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in1 to in8 Or their names setup in Motors and Sensors Setup.
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| Default Usage and Sample
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forward();
untilDark(); /* wait until the light sensor in port in2
detects an object darker than 505 (default) */
stop();
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| Usage and Sample with Parameters
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forward(63); // go forward at speed 63
untilDark(1005, in4); /* wait until the light sensor in port in4
detects an object darker than 1005 */
stop(); // stop
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| void untilRotations(float rotations = 1.0, tSensors sensorPort = dgtl1)
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(void) The robot does what it was doing until the motor encoder rotations match the desired value.
Range: -262,144.00 to +262,144.00
Acceptable Sensors: digital ports 1 through 11 (and your names for them given in Motors and Sensors Setup.)
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| Parameter
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Explanation
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Acceptable Input
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| rotations
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The amount of axle rotations to reach. (default: 1.0)
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Any floating point amount:
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| 0.####
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-2,048.0000 to +2,048.0000
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| 0.###
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-32,768.000 to +32,768.000
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| 0.##
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-262,144.00 to +262,144.00
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| 0.#
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-2,097,200.0 to +2,097,200.0
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| sensorPort
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The quadrature encoder to use. (default: dgtl1 [+ dgtl1])
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dgtl1 to dgtl11 Or their names setup in Motors and Sensors Setup.
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| Default Usage and Sample
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forward();
untilRotations(); /* wait until the quadrature encoder in port
dgtl1 (+ dgtl2) counts 1.0 rotations (default) */
stop();
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| Usage and Sample with Parameters
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forward(63); // move forward at speed 63
untilRotations(2.75, dgtl3); /* wait until the quadrature encoder in port
dgtl3 (+ dgtl4)counts 2.75 rotations */
stop(); // stop
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| void untilEncoderCounts(long distance = 360, tSensors sensorPort = dgtl1)
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(void) The robot does what it was doing until the motor encoder counts match the desired value.
Range: -2,147,483,648 to +2,147,483,647
Acceptable Sensors: digital ports 1 through 11 (and your names for them given in Motors and Sensors Setup.)
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| Parameter
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Explanation
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Acceptable Input
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| distance
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The amount of encoder counts to reach. (default: 360)
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Any whole integer amount from -2,147,483,648 to +2,147,483,647
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| sensorPort
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The quadrature encoder to use. (default: dgtl1 [+ dgtl1])
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dgtl1 to dgtl11 Or their names setup in Motors and Sensors Setup.
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| Default Usage and Sample
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forward();
untilEncoderCounts(); /* wait until the quadrature encoder in port
dgtl1 (+ dgtl2) counts 360 encoder counts (default) */
stop();
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| Usage and Sample with Parameters
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forward(63); // move forward at speed 63
untilEncoderCounts(990, dgtl3); /* wait until the quadrature encoder in port
dgtl3 (+ dgtl4)counts 990 encoder counts */
stop(); // stop
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| void turnFlashlightOn(tMotor flashlightPort = port4, short brightness = 63)
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(void) Turns a VEX Flashlight in a specfied motor port ON at a specified brightness.
Brightness Range: (off) 0 to 127 (bright)
Acceptable Ports: motor ports 1 through 10 (and your names for them given in Motors and Sensors Setup.)
NOTE: Brightness control only available in motor ports 1 and 10, or 2 through 9 when connected to a VEX Motor Controller 29.
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| Parameter
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Explanation
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Acceptable Input
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| sensorPort
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The VEX Flashlight to use. (default: port4)
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port1 to port10 Or their names setup in Motors and Sensors Setup.
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| brightness
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The level of brightness to set the VEX Flashlight to. (default: dgtl2)
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Any whole integer amount from 0 to 127.
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| Default Usage and Sample
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turnFlashlightOn(); // turn VEX Flashlight in port4 ON to half brightness [63] (default)
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| Usage and Sample with Parameters
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turnFlashlightOn(port10, 127); // turn VEX Flashlight in port10 ON to full brightness [127]
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