a guest on Mar 27th, 2012 - pastebin.com/1QSjwaTw

1QSjwaTw.js

my best solution so far: changing the updateTransformation function to take the transformation as an argument and then change the variable... something like updateTransformation({'rotate':-0.05});

function getTransformerCallback(delta) {
  return function() {
    delta.rotate     && (rotate     += delta.rotate)
    delta.translateX && (translateX += delta.translateX)
    delta.translateY && (translateY += delta.translateY)
    
    updateTransformation()
  }
}

$('#rotateLeft').click(getTransformerCallback({ rotate:-0.0.5 }))
// etc...