Prop interactions

The physgun_interactions KeyValues block affects how a prop is handled by and responds to the Gravity Gun. It is embedded in a model with the $keyvalues QC command.

Example

$keyvalues
{
	physgun_interactions
	{
	 	preferred_carryangles 	"0 0 0"
	 	onworldimpact 		stick
	 	onfirstimpact 		break
	 	onfirstimpact 		paintsplat
	 	onlaunch 		spin_zaxis
	 	onbreak 		explode_fire
	 	damage 			none
	}
}

Options

preferred_carryangles <angles>

Sets the angles, relative to the player's orientation, at which the prop will be held when carried.

This is used with the sawblades and propellers in Ravenholm, as well as the turret NPCs in Nova Prospekt.

onworldimpact <choices>

When hitting something after being thrown by the gravity gun... (entities too, not just the world)

stick

Cling to / embed in the surface.

bloodsplat

Create a blood decal

onfirstimpact <choices>

When you first hit something after being thrown...

break

Break on colliding with anything after being launched.

paintsplat

Applies paint decals to the first thing it hits after being launched.

impale

Impales whatever it first collides with after being launched.

onlaunch <choices>

When flung by the gravity gun...

Default

Physgun applies random angular velocity to the prop as it launches.

spin_none

Prop does not spin when launched.

spin_zaxis

Prop should spin around the Z axis when launched by the physcannon. (e.g. Ravenholm propellers.)

onbreak <choices>

When breaking because of being flung...

explode_fire

Ignite nearby enemies (that are flammable)

damage none

Prop does not move when 'attacked' with the physgun. It may still take damage, but it won't move due to the impact.

allow_overhead yes

Physgun can carry the prop directly above the player.

Note:Some entities don't need this to allow the prop to be carried above the player. See CGrabController::IsObjectAllowedOverhead().

onpickup create_flare

Emit a flare from the "fuse" attachment when picked up by the gravity gun.

Note:HL2_EPISODIC DLLs only; see CBreakableProp::OnPhysGunPickup().

See Also

• prop_data
• Adnan's Rotational Grav Gun - a 4MB demo mod that simply allows the player to control the "carryangles" of objects held by the Gravgun.