I'm currently developing a tangram game and I'm trying to make rotation on each puzzle piece with gesture detection on screen (touch / mobile).
At this stage, I see 2 different possibilities to do it :
1. one active piece is selected and the rotation of the piece depends on the rotation gesture speed around the piece
2. piece is selected with one finger and the second finger make a rotation around the piece for the rotation degree.
I had a look on this 2 plugins : plugin-multi-touch_t67519
but I don't think it can help a lot...
Any ideas on how I can do this ?
Many thanks for your help,