$treesway

When this parameter is added, it will make the material morph around to an env_wind entity to give it the effect that it's blowing in the wind, this effect is used for the trees you see in Counter-Strike: Global Offensive and various foliage seen in Insurgency. The effect assumes that the model is facing upwards, and the commands specify how much it should be affected by the env_wind entity. This parameter has possibly been in Valve games since Left 4 Dead, but was used until Left 4 Dead 2. Mods using the Alien Swarm codebase can enable this shader to take advantage of it.

Note:This was recently added to Team Fortress 2 with the Jungle Inferno Update and does not require env_wind to function.

Requires VertexLitGeneric.

Parameters

$treeSway                         "0" "1" or "2"
//Changes the treesway effect. 0 is no sway, 1 is classic tree sway, 2 is an alternate, radial tree sway effect in Portal 2, CS:GO, and Alien Swarm engines.
//Tree sway mode 2: Hacks to use tree sway code on rectangular sheets of plastic/tarp attached at the four corners. 
//Inverts the sway scale radius to be 1 at (0,0,0) in model space and fall off radially towards the edges of the model.
//The model is expected to be built lying in the xy plane in model space, with its center at the origin.

$treeSwayHeight                   "float"//The height in which the effect is applied.
$treeSwayStartHeight              "float"//The height from the origin in which the effect starts blending in.
$treeSwayRadius                   "float"//The radius from the origin in which the effect is applied.
$treeSwayStartRadius              "float"//The radius from the origin in which the effect starts blending in.
$treeSwaySpeed                    "float"//The speed multiplier of large movement such as the trunk.
$treeSwayStrength                 "float"//The distance multiplier of large movement such as the trunk.
$treeSwayScrumbleSpeed            "float"//The falloff of the effect on small movement such as the trunk. Higher means a more stable center.

$treeSwayScrumbleStrength         "float"//The speed multiplier of the small movement such as the leaves.
$treeSwayScrumbleFrequency        "float"//The distance multiplier of the small movement such as the leaves.
$treeSwayFalloffExp               "float"//The frequency of the rippling of a sine wave in small movement such as the leaves.
$treeSwayScrumbleFalloffExp       "float"//The falloff of the effect on small movement such as the leaves. Higher means a more stable center.

$treeSwaySpeedHighWindMultiplier  "float"//Speed multiplier when env_wind triggers a gust.
$treeSwaySpeedLerpStart           "float"//Minimum wind speed in which a gust triggered by env_wind will start affecting the material.
$treeSwaySpeedLerpEnd             "float"//Minimum wind speed in which a gust triggered by env_wind will fully affect the material.
$treeSwayStatic                   "1" //Whether or not to instead use a static wind value instead of the values from env_wind.