Help using phys_motor and phys_hinge

[Tiberius]

I'm trying to build one of the spinning Ravenholm traps, and I desperately need some help. I just can't seem to figure out how to use these entities quite correctly.

Here's my setup:
* TrapPropeller_Engine as a prop_static
* TrapPropeller_Blade as a prop_physics_multiplayer
* phys_hinge centered on the propeller's axle, attached to propeller and phys_motor
* phys_motor centered on the propeller's axle, with the propeller as the attached object

I think I have the axis of rotation for the hinge and motor set correctly. I grabbed the circle and drug it up in Z (parallel to the axel of the propeller).

When I compile and run, the propeller makes a few slow turns and then stops.

I have tried putting in a physics object to tie the propeller to insteasd of the motor, various groupings of the objects, etc. without any luck. Any help or suggestions offered would be appreciated tremendouslY!

 

[Mint_Sauce]

Make your propellor a func_physbox and get rid of the hinge. Now using your phys_motor, make the motor entity 1 and the propellor entity 2. That should be it.

 

[Tiberius]

Maybe I'm doing something wrong, but this did not yield good results for me...

I opened the propeller properties and changed it from prop_physics_multiplayer to func_physbox. In hammer, it completely disappears... If I try to compile and run the map anyway, it crashes the game.

Also, prop_physbox does not have an entry for world model. If I do get this to work, how would I get the func_physbox to look like the Ravenholm propeller?

Thanks.

 

[Deleter]

if you are using two models, do not use a physbox. just the propeller and a motor should spin. if this isn't happening something is wrong with your motor settings. also, make sure the motor doesn't have a timeout thing.

 

[Tiberius]

My understanding is that you need to have the hinge to hold the propeller in place. Otherwise, the propeller is a physics object hanging in mid-air. When the map spawns, the propeller simply falls to the ground...

Here is the setup of the motor, it seems pretty straightforward:
Name: Engine
Rotation Speed: 720 (tried 90->720)
Spin up time: 3
System Inertia Scale: 5.0 (tried 1.0, 2.0, 5.0)
Attached Object: Propeller

It's inputs are from a func_button which turns it on and off. I also start it immediately from a logic_auto OnMapSpawn. I have "hinge object" checked. I saw on one of the wiki's that you should check this flag if the object to be spun is held by a hinge.

I appreciate the suggestions so far, though. I will gladly supply the trap as a prefab for everyone if someone is able to help me get it working...

 

[NoisyMonk]

check out the sample SDK maps. one of them is called something like sdk_phys_motor. That should give you enough help.

 

[Tiberius]

I had looked at the sdk_phys_motor example previously... It is spinning a func_physbox, which apprently is different than spinning a physics object.

I did learn one thing by revisting this example, though. If you check the "hinge object" flag, the phys_motor will hold the physics object in place.