I guess so. Have you tried something like a linear interpolation? Say your pressure sensors are calibrated and returning values from 0.0 to 1.0 :

Code:

float rightPressure = 0.5*(upRightCornerPressure + downRightCornerPressure);
float leftPressure = 0.5*(upLeftCornerPressure + downLeftCornerPressure);
float x = paneWidth*(rightPressure-leftPressure); 

and same for y with up/down pressure calculation.

i think there has to be a more advanced calculation of the position since there are several problems with this method.

- i want the normal position (no = pressure) to be in the center.

- if i press right in the middle, the values i get are all > 0 but the position has still to be the normal position.

i wrote a skech to help understanding my problem: PressureSimulation.

in this sketch the position is calculated like this:
Code:

float calcX(){
    float rightPressure = 0.5 * (ruler_2.value + ruler_3.value);
    float leftPressure = 0.5 * (ruler_1.value + ruler_4.value);
    float x = width * (rightPressure-leftPressure);
    return x;
}

float calcY(){
    float upPressure = 0.5 * (ruler_1.value + ruler_2.value);
    float downPressure = 0.5 * (ruler_3.value + ruler_4.value);
    float y = height * (downPressure-upPressure);
    return y;
}