Converting degrees into inches similar to using drive train without actually using it?

Programming Support
1

i cannot use drivetrain option because my robot uses six motors on the drivebase.

is there any way i can program a function that allows me to change this:

frontRight.spinFor(fwd, 16, turns);

to:

frontRight.spinFor(fwd, 16, inches);

2

We know that the circumference of a circle is 2πr, meaning a wheel will move 2πr inches forward every rotation. So to get the number of rotations you need, divide the total distance you wish to travel by 2πr. Note that 2 * r is the diameter of a circle, so the circumference can also be calculated by π * D, which is more useful since Vex uses diameter for wheel size.

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3

could you show me what that would look like on vex code?

4

What dimeter are your wheels?

5

You can use the drivetrain, you’d just have to configure an additional motor for the drive group.

Are you using text or blocks?

6

You can do something like this:
motor leftMotorA = motor(PORT11, ratio18_1, false);
motor leftMotorB = motor(PORT4, ratio18_1, false);
motor leftMotorC = motor(PORT15, ratio18_1, false);
motor_group LeftDriveSmart = motor_group(leftMotorA, leftMotorB, leftMotorC);
motor rightMotorA = motor(PORT2, ratio18_1, true);
motor rightMotorB = motor(PORT7, ratio18_1, true);
motor rightMotorC = motor(PORT14, ratio18_1, true);
motor_group RightDriveSmart = motor_group(rightMotorA, rightMotorB, rightMotorC);
inertial DrivetrainInertial = inertial(PORT19);
smartdrive Drivetrain = smartdrive(LeftDriveSmart, RightDriveSmart, DrivetrainInertial, 319.19, 320, 40, mm, 1);
Of course, change ports and drivetrain values.

7

For the specific method you showed, no. The enum is predefined in the vex namespace, and there is no polymorphism for enums.

However, you can write a function that converts inches to rotations. See here for more info
https://www.learncpp.com/cpp-tutorial/introduction-to-functions/

1 Like
8

Are you sure because that code worked in a comp