SlopeMap

int inMax = 0,
    inMin = 0,
    translMax = 1024,
    translMin = 0;

rangeMax = getMaxValue();
rangeMin = getMinValue();

//Calculate 4 of these (xpos xneg ypos yneg)
float slope = 1.0 * (translMax - translMin) / (rangeMax - rangeMin);

int translate(int inputVal, int outputMin, int inputMin, double slope){ return outputMin + slope * (inputVal - inputMin); }

//use the correct slope depending on if x & y > centerValue (if xpos or ypos, start from centerValue and not 0 = translMin)
translatedValue = translate(inValue, translMin, rangeMin, slope);