It's not comfortable to turn Face and its shadow because axis goes through the nose of Face model.
Need to move it to the top of head both for rotation and light.
This will allow to get more effect from rotation and use fitting time more rationally.
Problems with shadows occurred. Need to complete #63 first.
Problems are following:
shadow map isn't calculated properly, because rotation and light matrices product gives not a rotation matrix, but rotation and perspective;
flat shadows seem to be calculated improperly: with fixed light vector and light vector rotated with the model shadows are changing during rotation, when expected to stay.
It's not comfortable to turn Face and its shadow because axis goes through the nose of Face model. Need to move it to the top of head both for rotation and light.
This will allow to get more effect from rotation and use fitting time more rationally.