View source for Particles on models

Particles can be '''attached to models''' with the [[$keyvalues]] QC command. Adding a <code>particles</code> section to it allows any number of effects to spawn on the model, and optionally to follow it around.

{{note|Particles will not appear if the model is used with [[prop_static]].}}
{{note|In most cases, particles attached to a player model will end up visible in first person, but relative to where the 3d playermodel would be in that spot. They will also sometimes disappear when the player dies.}}
{{tip|To attach particles to models programmatically, see [[Particles In Code]].}}
[[File:L4d2 particle attachment playermodel.png|400px|thumb|Fire particles in {{L4D2}} which were added to the 3rd person player models wrist. But for some reason they appear in the 1st person where the 3rd person models wrists are.]]
== Syntax ==

Within the [[$keyvalues]] block:

 particles
 {
 	effect
 	{
 		name			"<particle effect name>"
 		attachment_type		<attachment type>
 		attachment_point	<name of attachment point>
 	}
 
 	<further effects>
 }

; <code>name</code>
: The name of a particle system. NOT the name of a .pcf file!
; <code>attachment_type</code>
:Must match one of the valid attachment types. These are:
:; <code>start_at_origin</code>
:; <code>start_at_attachment</code>
:: The effect spawns at the [[origin]] or an [[attachment]] of the model. After this, it moves independently. Good for very short effects like explosions or blood spurts.
:; <code>follow_origin</code>
:; <code>follow_attachment</code>
:: The effect spawns at the origin or an attachment of the model. After this it follows the origin/attachment, rotating and moving to maintain its relative position. Good for long-term emmisive effects like smoke or trails.
; <code>attachment_point</code>
: The attachment point at which the particle system should spawn, if applicable.

From the point of view of the particle system, you can use several initialisers and operators which will affect how it behaves if it is set to follow an attachment or an origin. The motion of the particles can "follow" the control point by using the [[Movement Lock to Control Point]] operator. 

You can also use the [[Position on Model Random]] initializer to spawn the system dynamically across the model.

[[Category:Particle System]]
[[Category:QC Keyvalues]]