js touch relatif pos
x = e.touches[0].pageX - e.target.getBoundingClientRect().left
y = e.touches[0].pageY - e.target.getBoundingClientRect().top
Fair Flamingo
x = e.touches[0].pageX - e.target.getBoundingClientRect().left
y = e.touches[0].pageY - e.target.getBoundingClientRect().top