env_headcrabcanister

From Valve Developer Community

Contents 1 Entity description 2 Dedicated CVars 3 Keyvalues 4 Flags 5 Inputs 6 Outputs

Entity description

Headcrab Canister.

The canister is a mortar shell containing a payload of headcrabs. The mortar shell inflicts damage within a radius of where it lands and releases headcrabs after impact. Triggers and entity options offer control over impact damage and when the headcrabs are released, among other options.

For an example of their use, see the shantytown in d1_canals_05.

Dedicated CVars

• sk_env_headcrabcanister_shake_amplitude

<float> Crash effect's shake amplitude

• sk_env_headcrabcanister_shake_radius

<float> Crash effect's shake radius

• sk_env_headcrabcanister_shake_radius_vehicle

<float> Crash effect's shake radius for vehicles

Keyvalues

• Targetname:

• Parentname:

• Angles:

• HeadcrabType

<choices>

Literal Value	Description
0	Normal headcrabs
1	Fast Headcrabs
2	Poison Headcrabs

• HeadcrabCount

<integer> Number of headcrabs to spawn on impact

• FlightSpeed

<float> Speed to fly through the air

• FlightTime

<float> Time to fly through the air in seconds

• StartingHeight

<float> Relative height from the landing position at which the canister should be launched. Positive values mean launch it above the impact point, negative values mean launch it below.

• MinSkyboxRefireTime

<float> Min number of seconds before the canister is refired. This will only work for canisters placed in the skybox.

• MaxSkyboxRefireTime

<float> Max number of seconds before the canister is refired. This will only work for canisters placed in the skybox.

• SkyboxcanisterCount

<integer> Number of canisters to fire in the skybox (0 means fire continuously, forever).

• Damage

<float> Max damage the canister applies on impact

• DamageRadius

<float> Max radius of the impact damage for the canister

• SmokeLifetime

<float> Duration that the canister smokes. -1 means always smoke.

• LaunchPositionName

<target_destination> If the canister should launch to its origin from another point within the world, this should specify an info_target at the launch origin.

Flags

• 1 : No Impact Sound

• 2 : No Launch Sound

• 4096 : Start Impacted

• 8192 : Land at initial position

• 16384 : Wait for input to open

• 32768 : Wait for input to spawn headcrabs

• 65536 : No smoke

• 131072 : No shake

• 262144 : Remove on impact

• 524288 : No impact effects

Inputs

• Targetname:

• Parentname:

• FireCanister

• OpenCanister

Opens the canister (must be called after the OnImpacted output is fired)

• SpawnHeadcrabs

Spawns headcrabs (must be called after the OnImpacted output is fired and after OpenCanister is triggered, if the Wait for Input to open spawnflag is checked.)

• StopSmoke

Outputs

• Targetname:

• OnLaunched <targetname>

Fired when the canister is launched. The targetname is of the canister.

• OnImpacted

Fires when canister hits the ground

• OnOpened

Fires when canister has finished opening