Dynamic interactions
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The dynamic_interactions KeyValues block defines when and how to perform a dynamic interaction. For example; when Alyx kicks a zombie. It is embedded in a model with the $keyvalues QC command.
Once a dynamic interaction is defined in a model, the character(s) with this model can have the interaction with any other character that has the same sequence names or activity names. This only has to be defined in one of the two characters(NPCs)'s model participating in the interaction. For example; Alyx has the dynamic interactions defined in her model using this keyvalue, but the zombie model just has matching activity names.
Warning: Most of the "confirms" are there because I just assumed a lot of those descriptions. My assumptions were based on the names, Valve use in models, and the code that they use.
Example
Found in models/Alyx_animations.mdl
Note: This is only one of the interactions and it has been restructured for easier reading! $keyvalues
{
dynamic_interactions
{
"alyx_v_zombie_180deg_64"
{
"trigger" "auto_in_combat"
"origin_relative" "64 0 0"
"angles_relative" "0 180 0"
"activity" "ACT_DI_ALYX_ZOMBIE_MELEE"
"delay" "10.0"
"needs_weapon" "ME"
"weapon_mine" "weapon_alyxgun"
}
}
}
Options
Note: The "partner" is the character that this character is interacting with.trigger <choices>- What triggers this interaction... If this isn't defined, the interaction can be trigged via input
forceinteractionwithnpc "<targetname> <interaction name>"auto_in_combat- Automatically in combat.
loop_break_trigger <choices>- Stop looping the action animation if
loop_in_actionwas set.on_damage- Break loop on damage.
on_flashlight_illum- Break loop once illuminated by player's flashlight.
origin_relative <vector>- Desired relative origin of the other NPC
angles_relative <angles>- Desired relative angles of the other NPC
velocity_relative <vector>- Desired relative velocity of the other NPC
entry_sequence <sequence>- What sequence to play for this interaction before the main sequence/activity.
entry_activity <activity>- What activity to play for this interaction before the main sequence/activity.
sequence <sequence>- What sequence to play for this interaction.(The "action")
activity <activity>- What activity to play for this interaction.(The "action")
exit_sequence <sequence>- What sequence to play for this interaction after the main sequence/activity.
exit_activity <activity>- What activity to play for this interaction after the main sequence/activity.
delay <float>- Delay before interaction can be used again
origin_max_delta <float>- Max distance sqr from the relative origin the NPC is allowed to be to trigger
loop_in_action <float>Note: While the value is a float, it's used as a bool in code. - Loop in the "action" animation(the "activity" or "sequence" options.).
dont_teleport_at_end <choices>- Don't teleport/fix up positions at the end
me- Don't teleport/fix up this character's position
them- Don't teleport/fix up this character's partner's position
both- Don't teleport/fix up this character's or his partner's position
needs_weapon <choices>- Needs a weapon to perform this interaction?
ME- Does this character need a weapon?
THEM- Does this character's partner need a weapon?
BOTH- Does both this character and his partner need a weapon?
weapon_mine <classname>- The weapon required to perform this interaction. If undefined, will perform with any weapon.
weapon_theirs <classname>- Partner's weapon required to perform this interaction. If undefined, will perform with any weapon.
Related or Useful Stuff
Animation Events
These are useful animation events for those wanted to create an activity for a dynamic interaction. READ: Animation_Events
Todo: Move to dedicated page or animation event page?
Example:
{ event AE_NPC_HURT_INTERACTION_PARTNER 28 "THEM 100" }
AE_NPC_HURT_INTERACTION_PARTNER "<choices> <int>"- Hurt either this character or his partner... and how much(the int).
ME- Hurt this character
THEM- Hurt the partner
AE_NPC_SET_INTERACTION_CANTDIE "<bool>"- Set those participating in the interaction to become invincible Todo: Which NPC? The partner or this character
AE_NPC_WEAPON_FIRE "<bool>"- Fire this character's weapon. The bool is whether or not you want him to use the weapon's secondary fire.
Console Variable
ai_debug_dyninteractions "<bool>"- Debug the NPC dynamic interaction system.
Example(information printed in the console when looking):
DYNINT: (al) testing interaction "alyx_v_zombie_180deg_64" al is at: 404.55 -67.75 -115.91 al distsqr: 0.37 (468.17 -60.77 -115.91), desired: (468.24 -61.37 -115.91) Idle_Relaxed_Shotgun_2 Speed: 0.00 al angle matched: (0.00 186.25 0.00), desired (0.00, 185.72, 0.00)
Example(information printed in the console when starting an interaction):
npc_alyx(al) starting dynamic interaction "alyx_v_zombie_180deg_64" with npc_citizen(dude2). - Core sequence: alyx_zombie_fight2