I've just had occasion to use the pin tool for the first time. It was a fairly straight forward; just someone snapping shut the top section of a clapperboard to the clapper's body. I had the clapperboard body and person's hand holding the top bit of clapperbaord cut out as two separate layers in Photoshop. After importing to AE, I put a pin at the right end of the clapperboard top section and a pin on the person's hand at the left holding the top section. Unfortunately when I drag down the right end of the clapperboard top to simulate it shuting it bows like a banana rather than stays straight. If I put a pin in the middle of the clapper board top it obviously makes it bend even worse.
Am I doing something wrong? I had thought if only two pins were used at each end of a straight line, the line would stay straight if I dragged down one end.
Instead of the Puppet Tool, try rotating the clap board top. Set the top's anchor point where the hinge would be, reposition the it, and animate away.
As you've noted, the Puppet Tool is great at warping & bending things, but not keeping them straight.
Thanks Dave. Of course... looks like I made it more complicated than necessary.