How to cube a joystick controll to make a non-linear motor movement in python

[JerryTheMan]

What I want is to have is like this picture but code it in python

[Hudsonville_Robotics]

Guide to Exponential Drive Function

Hello everyone. Recently, my team made an exponential drive function for our robot’s drive base. It makes it easier to make small adjustments using the joysticks, while also allowing the robot to move at maximum power if necessary. I wanted to share it with the community. First of all, let me explain what our drive base code looked like without exponential drive. There were two set____Drive functions that were used in the driver control section. For simplicity, I’ll only include the setLeftDriv…

[Mentor_355U]

What happens mathematically when you cube a number? What arithmetic operation(s) are involved?

How would you take the input value from the joystick and change it according to arithmetic operation(s) you identify above?

Other questions to ask yourself / experiment with:

1. What are the range of values given by the Joystick axis in Vex Python?
2. Does that range match the -1 to 1 range you specify above?
3. If not, how can you manipulate the values to do so?

[tabor473]

Take the input joystick, divide it by its maximum value. Cube that value, multiply by maximum motor input value and send to motor.

[JerryTheMan]

How do I

1: find the joystick input in percentage

2: find the maximum value

3: find the motor maximum value

[Mentor_355U]

The Vex Code documentation contains this information and can be found: VEX Help

Alternatively, it can be helpful in situations like this to print out values either to the Brain, the Controller, or the Terminal.

[sazrocks]

this is left as an exercise for the reader

[JerryTheMan]

So there is the code for joystic axis but how would i make that into a number?

[Mentor_355U]

You are on the right path. Keep going thru the documentation or whatever method led you to find the axis and you’ll find your answer.

[JerryTheMan]

I lloked through the documentation you linked but cant find it any hints to where its at?

[jpearman]

Not sure why you are having so much trouble with this.
Unfortunately the documentation that was linked is for C++, however, assuming you are using VEXcode to program, create a controller device using the graphical configuration and then help will give you everything you need.