smooth variable changing?

[Derpy]

hi there!

i wanted to ask, how could i smoothly change a value of variable(e.g from 0-255 and then when it's at 255 it goes back to 0,and keeps doing that in an infinite loop)?

[IIYAMA]

By using your frames per second? FPS

https://wiki.multitheftauto.com/wiki/OnClientRender

It can't be smoother then that, you won't see the differences if you do it faster.

[Derpy]

  
variable = 0 
function changeVariables() 
local vAlpha = getElementAlpha(getPedOccupiedVehicle(localPlayer))) 
if variable >= 0 and < 255 then 
variable = variable + 0.1 
 setElementAlpha(getPedOccupiedVehicle(localPlayer), variable)  
elseif variable == 255 then 
variable = variable - 0.1 
setElementAlpha(getPedOccupiedVehicle(localPlayer), variable)  
end 
end 

yea i tried 1020139332 ways of making this crap and i never figured it out

can you help?

[IIYAMA]

try this: (not tested)

local variable = 0 
local stateOfAlphaChanging = false 
function changeVariables() 
    local vehicle = getPedOccupiedVehicle(localPlayer) 
    if vehicle then 
        dxDrawText(200,300,tostring(getElementAlpha(vehicle))) -- debug 
  
        if stateOfAlphaChanging then  
            variable = variable + 0.1 
        else 
            variable = variable - 0.1 
        end 
  
        if variable < 0 then 
            stateOfAlphaChanging = true 
            variable = 0--reset 
        elseif variable > 255 then 
            stateOfAlphaChanging = false 
            variable = 255--reset 
        end 
        setElementAlpha(vehicle, variable) 
    end 
end 
  
addEventHandler("onClientRender",root,changeVariables) 

1 extra variable is managing the state of the alpha change.

[botder]

Don't base your calculations on the FPS rate!

[IIYAMA]

If you base it on time, you won't have smooth animated alpha.

[Et-win]

@Necktrox: This depends on how you calculate it.

You should use getTickCount() too to make it the same speed in every FPS

[botder]

He is using absolute values: The effect will differ for each amount of fps

[IIYAMA]

It is an effect, not something critical.

[Et-win]

He is using absolute values: The effect will differ for each amount of fps

I know:

You should use getTickCount() too to make it the same speed in every FPS

[WASSIm.]

try this

function changeVariables() 
    local vehicle = getPedOccupiedVehicle(localPlayer) 
    if vehicle then 
        local alpha = getElementAlpha(vehicle) 
        alpha = alpha*math.abs(getTickCount()%1000-500)/500 
        setElementAlpha(vehicle, alpha) 
    end 
end 
addEventHandler("onClientRender",root,changeVariables) 

[ixjf]

Use interpolateBetween with onClientRender or use the dt parameter from the onClientPreRender to calculate the step.