About testing the face alignment without ground truth *.pts files

Hi, your code has been very helpful to me! Thank you for your contribution!
I have got your code running with afw dataset and the result is good.
However, I meet some problems when I try to do face alignment with my own images which do not have the ground truth .pts files.
I read through your code, and try to replace bbox_facedet with viola jones detector result. But the shape_gt variable seems confusing to me.
Could you tell me how can I modify your code to realise face alignment with my own images?