How to do pinch gestures on the iPhone?

Question

How does one implement pinch gestures on the iPhone? I\'m familiar with using touch events on the iPhone but I\'m extremely lazy and don\'t want to re-invent the wheel for somet

Answer 1

hmmm.....it seems that some people are extremely confused on how to use basic math. the dot product is totally irrelavent and just confuses the issues. dot prod between 2 vectors is used to calculate the angle between them.

You actually need to use pythagorus theorem. Dot is NOTHING to do with finding distance between points - only pythagorous!