Const
Thrust per unit of ln(distance / previous distance), times movementSpeed. Logarithmic so a pinch from 100 → 200 px and one from 200 → 400 px travel the same distance, and pinch-in exactly undoes pinch-out.
ln(distance / previous distance)
movementSpeed
Thrust per unit of
ln(distance / previous distance), timesmovementSpeed. Logarithmic so a pinch from 100 → 200 px and one from 200 → 400 px travel the same distance, and pinch-in exactly undoes pinch-out.