The 2nd Joystick must DIE

[Hadi379]

Can someone look at my telop code and let me know if this is correct. I thought I was on the right track, but from other posts on here, I decided to go another route. The image of the telop.vi is attached. Sorry for the poor resolution, but i had to make the file size small enough. Thanks....

[jhersh]

Originally Posted by Hadi379

Can someone look at my telop code and let me know if this is correct. I thought I was on the right track, but from other posts on here, I decided to go another route. The image of the telop.vi is attached. Sorry for the poor resolution, but i had to make the file size small enough. Thanks....

It looks reasonable, but there is an easier way to convert from cartesian to polar (the magnitude and direction). In the palette under Programming >> Numeric >> Complex choose "Re/Im to Polar". This VI does all that math internally. The output is in radians, so you still need the conversion to degrees.

In the next update there will also be a VI that takes cartesian inputs so you can wire your joystick up directly.

As for the poor resolution, you should use jpg or png, not bmp. bmp is basically just a raw image with no compression.

[Joe Ross]

Originally Posted by jhersh

It looks reasonable, but there is an easier way to convert from cartesian to polar (the magnitude and direction). In the palette under Programming >> Numeric >> Complex choose "Re/Im to Polar". This VI does all that math internally. The output is in radians, so you still need the conversion to degrees.

The help implies that some of the inputs should be in degrees. However, when I dug in, it looks like it limits the values to -1 to 1, which implies they should not be degrees, but joystick values. Am I reading that right?

Also, wouldn't putting the gyro in as an input cause positive feedback? Shouldn't that also be a joystick value?

[jhersh]

Originally Posted by Joe Ross

The help implies that some of the inputs should be in degrees. However, when I dug in, it looks like it limits the values to -1 to 1, which implies they should not be degrees, but joystick values. Am I reading that right??

I assume you are talking about digging into the HolonomicDrive VI. It takes 3 inputs... Magnitude (which is from 0.0 - 1.0), Direction (which is in degrees) and Rotation (which is -1.0 to 1.0, but has errant documentation claiming it is in degrees/sec).

Originally Posted by Joe Ross

Also, wouldn't putting the gyro in as an input cause positive feedback? Shouldn't that also be a joystick value?

Who's putting the Gyro in? I'm guessing you mean into the Direction input. The Gyro only comes into play if you want field oriented control, in which case you would subtract the gyro angle from the desired direction coming from the cartesian to polar conversion.

-Joe

[Joe Ross]

Originally Posted by jhersh

Who's putting the Gyro in? I'm guessing you mean into the Direction input. The Gyro only comes into play if you want field oriented control, in which case you would subtract the gyro angle from the desired direction coming from the cartesian to polar conversion.

-Joe

Nevermind, I didn't follow the wires correctly.