Thsi script is used as a OnOpen handler script of the door, placeables or secret doors.

This should be used by all doors. If special handing is required use Hooks to modify the behavior of this script.

This function will do following things:

1. Hooks: Call the OnOpen hook if defined.
2. Animation: Play open_animation or ANIMATION_LOOPING_GET_MID.
3. Visual effects: Visual effects used open_vfx*, and open_vfx_player*.
4. Closing: Start closing timer.
5. Invisible: If player is invisible check if other near the door notice.
6. Linked door: If door is linked, open the linked door (play open_vfx*), and check if those there notice door opening.

Variables in the placeables
Hooks
_gen_door_are
_gen_door_clo
_gen_door_dam
_gen_door_fai
_gen_door_loc
_gen_door_unl