How do I get my robot to do a different function if I press the screen on the left side or the right side

Programming Support VEXcode Pro V5 Text Tech Support
1

So this is what I have so far. I want it to be that if I press the left side of the screen, the red square shows up, and when I touch the right side the robot turns right. Also when I stop pressing it stops the action. What do I need to add to get to that?

while(true){
if(Brain.Screen.pressing()){
Brain.Screen.setFillColor(red);
Brain.Screen.drawRectangle(240,120,100,100);
}
else{
Brain.Screen.clearScreen();
}

if(Brain.Screen.pressing()){
rightMotor.spin(reverse);
leftMotor.spin(forward);
}
else{
rightMotor.stop();
leftMotor.stop();
}

}
2

only check for pressing once in the while loop, then use xPosition and/or yPosition to determine the last position pressed on the screen, make a decision based on the numbers returned, for example, if xPosition() is less than 240 do one action else do the other.

https://api.vexcode.cloud/v5/html/classvex_1_1brain_1_1lcd.html

1 Like
3

so like this?, sorry Iā€™m not that good. I may not have been clear, I need it that if I press one side it does that action but when I let go it stops.

while(true){
if(Brain.Screen.xPosition()<240){
Brain.Screen.setFillColor(red);
Brain.Screen.drawRectangle(240,120,100,100);
}
else{
Brain.Screen.clearScreen();
}

if(Brain.Screen.xPosition()>240){
rightMotor.spin(reverse);
leftMotor.spin(forward);
}
else{
rightMotor.stop();
leftMotor.stop();
}
}
5

I was thinking of something more like this.

int main() {
    bool screenPressed = false;

    while(1) {
      if( Brain.Screen.pressing() && !screenPressed ) {
        // screen was pressed
        
        // set flag so we only execute this code once
        screenPressed = true;

        // now decide if left or right side of the screen
        if( Brain.Screen.xPosition() < 240 ) {
          // left hand side of screen
          // do something.
        }
        else {
          // right hand side of screen
          // do something else
        }
      }
      else
      if( !Brain.Screen.pressing() ) {
        // screen is not pressed
        screenPressed = false;

        // do something when not pressed
      }
 

      this_thread::sleep_for(20);
    }
}
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