translate method
Translates this envelope by given amounts in the X and Y direction.
@param transX the amount to translate along the X axis @param transY the amount to translate along the Y axis
Implementation
void translate(double transX, double transY) {
if (isNull()) {
return;
}
init(getMinX() + transX, getMaxX() + transX, getMinY() + transY,
getMaxY() + transY);
}