Interpolation Trouble

[werewolf0020]

im just trying to get the player viewmodel to interpolate its position to an specific vector , it interpolates to the vector successfully but when i try to return it back to its original position rather than moving smooth-ish it just snaps back

[LUA]function SWEP:GetViewModelPosition( pos, ang )

if ( !self.IronPos ) then return pos, ang end

local bInterp = self.Weapon:GetNetworkedBool( "Interpolate" ) // On SWEP:SecondaryAttack i set both interpolate and Ironsight to true
local bIron = self.Weapon:GetNetworkedBool("Ironsight")
local NewPos = Vector(0,0,0)
local NewAng = Vector(0,0,0)

if(bIron == true) then
NewPos = self.IronPos;
NewAng = self.IronAng;
end

if ( bInterp != self.bLastInterp ) then

self.bLastInterp = bInterp
self.finterpTime = CurTime()

if ( bInterp ) then
self.SwayScale = 0.3
self.BobScale = 0.1
else
self.SwayScale = 1.0
self.BobScale = 1.0
end

end

local fIronTime = self.fIronTime or 0

if ( !bInterp && finterpTime < CurTime() - INTERPOLATION_TIME ) then
return pos, ang
end

local Mul = 1.0

if ( finterpTime > CurTime() - INTERPOLATION_TIME ) then

Mul = math.Clamp( (CurTime() - finterpTime) / INTERPOLATION_TIME, 0, 1 )

if (!bInterp) then Mul = 1 - Mul end

end

ang = ang * 1
ang:RotateAroundAxis( ang:Right(), NewAng.x * Mul )
ang:RotateAroundAxis( ang:Up(), NewAng.y * Mul )
ang:RotateAroundAxis( ang:Forward(), NewAng.z * Mul )

local Right = ang:Right()
local Up = ang:Up()
local Forward = ang:Forward()

pos = pos + NewPos.x * Right * Mul
pos = pos + NewPos.y * Forward * Mul
pos = pos + NewPos.z * Up * Mul

return pos, ang

end[/LUA]

So yeah..

[Berkin]

Upon first look, I think your "snapping" problem comes from this part of the code:

[LUA]
if ( !bInterp && finterpTime < CurTime() - INTERPOLATION_TIME ) then
return pos, ang
end
[/LUA]

If bInterp is only set to true when you aim, it will be set to false when you aren't aiming, thus returning the original position and angle. I might be wrong, but I suggest looking into this.

[werewolf0020]

Alright so tried setting it to true as soon i aim ( and leave it like that even when i un-aim ) and the result is nearly the same, first time i press right click = interpolates fine, press it again snaps back, now if i try to aim AGAIN it snaps back to the position rather than moving smooth ish

[Nopari]

You are using a really hard method.

[LUA]local NewPos = Vector(0,0,0)
local NewAng = Vector(0,0,0)
function SWEP:GetViewModelPosition( pos, ang )

if ( !self.IronPos ) then return pos, ang end

local bInterp = self.Weapon:GetNetworkedBool( "Interpolate" ) // On SWEP:SecondaryAttack i set both interpolate and Ironsight to true
local bIron = self.Weapon:GetNetworkedBool("Ironsight")

if bIron then
NewPos = Lerp(FrameTime(), NewPos, self.IronPos)
NewAng = Lerp(FrameTime(), NewAng, self.IronAng)
else
NewPos = Lerp(FrameTime(), NewPos, Vector(0,0,0))
NewAng = Lerp(FrameTime(), NewAng, Vector(0,0,0))
end

if ( bInterp ) then
self.SwayScale = 0.3
self.BobScale = 0.1
else
self.SwayScale = 1.0
self.BobScale = 1.0
end

ang = ang * 1
ang:RotateAroundAxis( ang:Right(), NewAng.x )
ang:RotateAroundAxis( ang:Up(), NewAng.y )
ang:RotateAroundAxis( ang:Forward(), NewAng.z )

local Right = ang:Right()
local Up = ang:Up()
local Forward = ang:Forward()

pos = pos + NewPos.x * Right
pos = pos + NewPos.y * Forward
pos = pos + NewPos.z * Up

return pos, ang

end[/LUA]

There's a global for linear interpolation.

[LUA]Lerp(delta, from, to)[/LUA]

Also, using FrameTime() keeps it smooth even on low framerates.

[werewolf0020]

feel free to correct me if im wrong but Lerp only interpolates numbers, LerpVector is the function that actually interpolates an vector and yes i have alredy tried it as well ( using frametime to try to keep it smooth ) but it dident worked well..probably missed someting

[EvacX]

[QUOTE=werewolf0020;42647970]feel free to correct me if im wrong but Lerp only interpolates numbers, LerpVector is the function that actually interpolates an vector and yes i have alredy tried it as well ( using frametime to try to keep it smooth ) but it dident worked well..probably missed someting[/QUOTE]

'Lerp' is defined via substraction, multiplication and addition. All operators of which vectors support, so no, it works just fine with vectors or anything else that support those operators.

[Luni]

[QUOTE=EvacX;42651117]'Lerp' is defined via substraction, multiplication and addition. All operators of which vectors support, so no, it works just fine with vectors or anything else that support those operators.[/QUOTE]

A little uglier for garbage collection, though.

Although to be fair I'm not sure how nicely LerpVector and LerpAngle behave.

[werewolf0020]

alright, Thanks for the help ! its working now