lib/display/tile-layer.js
function matrix3d (scale, translate) {
  var k = scale / 256
  var r = scale % 1 ? Number : Math.round
  return 'matrix3d(' + [k, 0, 0, 0, 0, k, 0, 0, 0, 0, k, 0, r(translate[0] *
    scale), r(translate[1] * scale), 0, 1] + ')'
}
function matrix3d (scale, translate) {
  var k = scale / 256
  var r = scale % 1 ? Number : Math.round
  return 'matrix3d(' + [k, 0, 0, 0, 0, k, 0, 0, 0, 0, k, 0, r(translate[0] *
    scale), r(translate[1] * scale), 0, 1] + ')'
}
function matrix3d ( scale , translate ) { var k = scale / 256 var r = scale % 1 ? Number : Math . round return 'matrix3d(' + [ k , 0 , 0 , 0 , 0 , k , 0 , 0 , 0 , 0 , k , 0 , r ( translate [ 0 ] * scale ) , r ( translate [ 1 ] * scale ) , 0 , 1 ] + ')' }
Get the 3D Transform Matrix
Get the 3D Transform Matrix