The "Big Ore Grinder" has no collision when used by NPC "Orc Slave".

[Quintus24]

Hello, everyone!

I would like to report the following bug:

Describe the bug: This issue can be encountered in the Old Mine at the OM_CAVE1_81 or OM_CAVE1_82 waypoints. The character has no collision with the "big ore grinder" when it's used by the NPC "Orc Slave". If the Orc Slave is interrupted or killed, then the "big ore grinder" has collision and the character can climb it or get stuck in it, etc.

Expected behavior: The "big ore grinder" has collision effects in both used and unused modes.

Steps to reproduce the issue

1. Travel to the Old Mine and enter it.
2. Reach the OM_CAVE1_81 or OM_CAVE1_82 waypoints.
3. Notice the NPC "Orc Slave" working on the "big ore grinder".
4. Notice there is no collision with the object by walking and jumping through it.
5. Interrupt or kill the Orc Slave.
6. Notice there is collision with the object by walking and jumping through it.

Additional context I'm inclined to believe that this behavior is intended, so that it won't break the Orc's scripted routines, maybe. Or just to prevent the user from dying, by not being crushed, if such game physics exist.

Attaching some screenshots for more clear information.

1. The "Big Ore Grinder".

2. Location at OM_CAVE1_81 waypoint.

3. Location at OM_CAVE1_82 waypoint.

4. No collision (part 1).

5. No collision (part 2).

6. No collision (part 3).

7. Dead NPC "Orc Slave".

8. The "Big Ore Grinder" now has collision when usued.

Thank You and Best Regards! Quintus24

[szapp]

Typically, the collision is lifted of a VOB when it is in motion. This should also hold for any MOB in use by NPCs. Nevertheless, this is usually not noticeable, because of their size or brief time of movement. Since the grind block is one single large object that moves continuously, I’d assume it’s collision is not reinstated until movement comes to a stop.

The collision therefore cannot be enabled during the motion. An alternative would be to place an invisible cylindrical object of the extend of the block center that remains with enabled collision. This would at least prevent the walking and jumping through the grinding block’s center. I am not sure how smoothly that would work and how much effort that will be.