int toLength = Math.abs(toEnd - toStart) + 1;
int fromLength = toLength * type.getFromRatio() / type.getToRatio();
fromEnd = fromStart + fromLength - 1;
int toLength = Math.abs(toEnd - toStart) + 1;
int fromLength = toLength * type.getFromRatio() / type.getToRatio();
fromEnd = fromStart + fromLength - 1;