Entity:GetAttachment
Description
Gets the orientation and position of the attachment by its ID, returns nothing if the attachment does not exist.
The update rate of this function is limited by the setting of ENT.AutomaticFrameAdvance for Scripted Entities!
This will return improper values for viewmodels if used in GM:CalcView.
Arguments
Returns
1 table
The angle and position of the attachment. See the Structures/AngPos. Most notably, the table contains the keys "Ang" and "Pos".
Example
Grabs the muzzle position of a player's view model.
local vm = ply:GetViewModel()
local obj = vm:LookupAttachment( "muzzle" )
if (obj < 1) then
local muzzle = vm:GetAttachment( obj )
print( muzzle.Pos, muzzle.Ang )
end
Example
Draws a green cube at the player's view model muzzle if the model has a "muzzle" attachment. This properly translates the attachment into the view model projection space.
-- FIXME: The nFOV parameter should be replaced with ViewModelFOV() when it's binded
local function FormatViewModelAttachment(nFOV, vOrigin, bInverse --[[= false]])
local vEyePos = EyePos()
local aEyesRot = EyeAngles()
local vOffset = vOrigin - vEyePos
local vForward = aEyesRot:Forward()
local nViewX = math.tan(nFOV * math.pi / 360)
if (nViewX == 0) then
vForward:Mul(vForward:Dot(vOffset))
vEyePos:Add(vForward)
return vEyePos
end
-- FIXME: LocalPlayer():GetFOV() should be replaced with EyeFOV() when it's binded
local nWorldX = math.tan(LocalPlayer():GetFOV() * math.pi / 360)
if (nWorldX == 0) then
vForward:Mul(vForward:Dot(vOffset))
vEyePos:Add(vForward)
return vEyePos
end
local nFactor = nWorldX / nViewX
local vRight = aEyesRot:Right()
local vUp = aEyesRot:Up()
if (bInverse) then
vRight:Mul(vRight:Dot(vOffset) / nFactor)
vUp:Mul(vUp:Dot(vOffset) / nFactor)
else
vRight:Mul(vRight:Dot(vOffset) * nFactor)
vUp:Mul(vUp:Dot(vOffset) * nFactor)
end
vForward:Mul(vForward:Dot(vOffset))
vEyePos:Add(vRight)
vEyePos:Add(vUp)
vEyePos:Add(vForward)
return vEyePos
end
local vBoxMins = Vector(-2, -2, -2)
local vBoxMaxs = Vector(2, 2, 2)
local colBox = Color(0, 255, 0)
function SWEP:ViewModelDrawn()
local pOwner = self:GetOwner()
if (not pOwner:IsValid()) then return end
local pViewModel = pOwner:GetViewModel()
if (not pViewModel:IsValid()) then return end
local uAttachment = pViewModel:LookupAttachment("muzzle")
if (uAttachment < 1) then return end
local tAttachment = pViewModel:GetAttachment(uAttachment)
if (tAttachment == nil) then return end
-- FIXME: This should be removed when ViewModelFOV() is binded
local nFOV = self.ViewModelFOV
if (not isnumber(nFOV)) then nFOV = 62 end
render.DrawWireframeBox(FormatViewModelAttachment(nFOV, tAttachment.Pos, true), tAttachment.Ang, vBoxMins, vBoxMaxs, colBox, true)
end
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