Turn off animation, modal, angular-ui

Currently, the bootstrap classes are embedded in the directive and need to be overridden. If you want to prevent that vertical 'drift' into position of the modal window, place the following 2 classes in your css :

.modal.fade {
  opacity: 1;
}

.modal.fade .modal-dialog, .modal.in .modal-dialog {
  -webkit-transform: translate(0, 0);
  -ms-transform: translate(0, 0);
  transform: translate(0, 0);
}

What you would be accomplishing here is the negation of the existing translations. Not ideal, however will do the trick.

animation (Type: boolean, Default: true) - Set to false to disable animations on new modal/backdrop. Does not toggle animations for modals/backdrops that are already displayed.

var modalInstance = $uibModal.open({
  animation: false