i need help with code making a arcade drive with four motor on the right analog stick.:eek:
Something like this (not tested or compiled), motor_left_1 etc. should be defined in motors and sensors setup.
#define JOY_DRIVE_V vexJSRightV
#define JOY_DRIVE_H vexJSRightH
void arcade_drive()
{
int ctl_v;
int ctl_h;
int drive_l;
int drive_r;
ctl_v = vexRT JOY_DRIVE_V ];
ctl_h = vexRT JOY_DRIVE_H ];
// Create drive for left and right motors
drive_l = (ctl_v + ctl_h) / 2;
drive_r = (ctl_v - ctl_h) / 2;
motor motor_left_1 ] = drive_l;
motor motor_left_2 ] = drive_l;
motor motor_right_1 ] = drive_r;
motor motor_right_2 ] = drive_r;
}could u break it down and help me??
Here I am defining the two joystick axis I want to use
vexJSRightV is the same as Ch2
vexJSRightH is the same as Ch1
I’m doing this so if I decided to change to the left stick it’s easy to find, you could skip if you want and just use Ch1 and Ch2 in the code.
#define JOY_DRIVE_V vexJSRightV
#define JOY_DRIVE_H vexJSRightHSome variables to make the code easier to read
int ctl_v;
int ctl_h;
int drive_l;
int drive_r;
Get the values of the vertical and horizontal joystick and save in two variables
ctl_v = vexRT JOY_DRIVE_V ];
ctl_h = vexRT JOY_DRIVE_H ];
This is the classic arcade drive algorithm, you could skip the divide by 2 for a faster drive. store the result in two variables, one for the left motors and one for the right.
// Create drive for left and right motors
drive_l = (ctl_v + ctl_h) / 2;
drive_r = (ctl_v - ctl_h) / 2;
Send the left drive value to the two left motors
motor motor_left_1 ] = drive_l;
motor motor_left_2 ] = drive_l;
Send the right drive value to the two right motors
motor motor_right_1 ] = drive_r;
motor motor_right_2 ] = drive_r;This code is deliberately long, it could be shortened to perhaps 4 lines but I thought it would be easier to understand this way.
what would the one in four lines look like?
motor motor_left_1 ] = (vexRT vexJSRightV ] + vexRT vexJSRightH ]) / 2;
motor motor_left_2 ] = (vexRT vexJSRightV ] + vexRT vexJSRightH ]) / 2;
motor motor_right_1 ] = (vexRT vexJSRightV ] - vexRT vexJSRightH ]) / 2;
motor motor_right_2 ] = (vexRT vexJSRightV ] - vexRT vexJSRightH ]) / 2;just so i can understand it can u break it down?
do u also know how to program a four motor drive with a holonomic drive all on the right joy stick?
You can’t really, while still taking full advantage of the holo drive. One joystick is needed to control forward/back/side-side motion, while the other would be needed to control spin. (At least, that’s the way I see it)
//Andrew
i figured it out
Will you tell how? 
//Andrew
well you have to have a seprate joystick for the strafe.
Ok, thanks!
//Andrew