#How Can I add easing style onto this lerp

1 messages · Page 1 of 1 (latest)

late finch
# 
if mvector ~= Vector3.zero then
    if cam.FieldOfView == 80  then return end
    cam.FieldOfView = cam.FieldOfView + (80 - cam.FieldOfView)*3*dt2
else 
    if cam.FieldOfView == 70  then return end
    cam.FieldOfView = cam.FieldOfView + (70 - cam.FieldOfView)*6*dt2
end```

This is connected to renderstep, the mvector is basically move vector of the player. This is an Fov changing script when you start walking.
lost haven
late finch
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Tween?

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But it would be glitchy

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Let me try then

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wait I can't do that

late finch
lost haven
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oh right

dusky cedar
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To have easing you must know where about in the lerp you are

lost haven
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why does it have to be in a renderstep though?

late finch
dusky cedar
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Your lerps don't have a alpha value to have easing

late finch
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I use the cam Fov to know where I'm

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I mean percentage

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But It overlaped

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with the easing

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local fov = 70
local start = 70
local goal = 80
local Tw = game:GetService("TweenService")
for i = 0,1, .1 do
    local alpha = Tw:GetValue((fov-start+1)/10,Enum.EasingStyle.Sine,Enum.EasingDirection.InOut)
    fov = start + (goal-start)*alpha
end```
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My tes code

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using the cam Fov to calculate alpha

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It worked

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But when I plugin the easing

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It overlap

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(fov-start+1)/10

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Linear alpha can be calculate pretty easy

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by math

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How to do the alpha of sine with the same approach?

dusky cedar
# 
local startValue = 5
local targetavalue = 20
local alpha = 0
while true do
    value = (targetValue - startValue) * alpha
    print(value)
    if alpha == 1 then break end
    alpha = math.min(alpha + task.wait(), 1)
end
late finch
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Okay

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Let me see

late finch
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Do you know it?

dusky cedar
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Value is fov

late finch
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Yeah I know

dusky cedar
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Startvalue is the fov starts at

late finch
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I'm applying it

dusky cedar
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And targetvalue is the fov you want

late finch
late finch
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Which calculate where I'm

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But not in Sine but in linear equation

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(current-start)/(goal-start)

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loike that

dusky cedar
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Then once you done my version you can use the tween service to have different easing styles

late finch
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It's more optimized

late finch
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want to know if a percent calculation like this

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exist in sine equation

dusky cedar
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You want to use sin to calculate the alpha?

late finch
dusky cedar
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Alpha = sin(time)

late finch
dusky cedar
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Or you can use the tween service

late finch
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is there this equation but in sine version?

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(current-start)/(goal-start)

dusky cedar
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Tween service has sin built into it

late finch
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which in linear is very easy to calculate

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but it's harder in sine

dusky cedar
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How do you need the inverse?

late finch
late finch
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But in sine how can we get the alpha given the current value

dusky cedar
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Iv been scripting for 100 years and iv never needed to get the inverse of sin before

late finch
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Educational purpose

dusky cedar
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Search Google I'm sure it will tell you how to do it

late finch
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Thank you

late finch
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🥳

dusky cedar
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I don't know

late finch
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I mean it save the alpha

dusky cedar
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My version is able to tell you where abouts in the lerp you are

late finch
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we don't need to calculate

dusky cedar
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Alpha is from 0 to 1

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0 meaning 0% and 1 being 100%

late finch
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my approach need to calculate the alpha base on where we are

late finch
dusky cedar
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Your version never gets to 100%

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And your version is not frame rate independent

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So your version will get effected by frame rate

late finch
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this is the original

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linear style

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it clearly have an alpha

dusky cedar
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Also your not using the tweenservice

late finch
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when I plugin I will make sure there's delta

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But your version seem better

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so nvm

dusky cedar
late finch
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what?

late finch
dusky cedar
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I'll have a video soon showing how to do lerp with correct delta

late finch
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I calculate the delta

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using my calculator

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if I lerp using example 0.3

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wait

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how to explain this

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🤔

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oh yeah

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No delta mean like 1 second

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so

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0.3*1

dusky cedar
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In the original message of this post

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Delta was not used correctly

late finch
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Yeah

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But it not effected by framerate

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This video is good

dusky cedar
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Lets say you have a frame rate of 1 and someone else has a framerate of 2

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So the person with a frame rate of 2 will run the loop 2 times and the person with the frame rate of 1 will run the loop once

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So if you do

fov = (80 - fov) * dt

late finch
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I calculate delta like this number÷ (1 ÷ 60)

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Is that wrong?

dusky cedar
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Let's say fov starts at 70

late finch
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Okay

dusky cedar
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For the person running at 2 FPS DT is 0.5

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For the person running at 1 FPS DT is 1

late finch
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😱

dusky cedar
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Let's first do 2fps guy

late finch
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I have commited a crime

dusky cedar
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(80 - 70) * 0.5 = ???

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It's 5

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So 5 would be added to fov

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So not for is 75

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Let's now do it the second time

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(80 - 75) * 0.5 = ???

late finch
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but

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(80-70)*1 = 10

dusky cedar
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It's 2.5

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So we add 2.5

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So the player will have a fov of 77.5 after 1 second

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Now let's do the player with 1 fps

late finch
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Yay

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(80-70)*1 = 10

dusky cedar
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(80 - 70) * 1 = ???

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So we add 10

late finch
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😱

dusky cedar
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And that player the fov will be 80 after 1 second

late finch
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😢

dusky cedar
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So the player with 1 FPS will go from 70 to 80 after 1 second

And the player with 2 fps will go from 70 to 77.5 after 1 second

late finch
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😢

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So sad

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I know now

dusky cedar
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So your delta time is not correct in the original message of this post

late finch
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a car with constant speed

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and a car with decreasing speed

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thank you for saving my life

dusky cedar
late finch
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I know you keep your promise suphi

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🥳

late finch
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you still remember about the inverse sine thing right?

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😋

dusky cedar
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Yer

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I think it's a simple equation

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It's like trying to find the angle based on the length of the triangles side 📐

late finch
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😅

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How to get alpha

dusky cedar
late finch
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😱

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inverse sine equation

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?

dusky cedar
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Sin is the height of the side of the triangle 📐 based on the angle

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So you have to do it the other way around

late finch
dusky cedar
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I'm talking about getting the inverse of sin

late finch
late finch
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Oh no

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wait

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How to minus angle numerically

late finch
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How to turn those two tan ratio to a new tan ratio

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which form by minusing two angle

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like angle1 - angle2

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angle1 = tan -1 (a/b)

dusky cedar
late finch
dusky cedar
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Sin(angle) = length of the right side of triangle

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Based on the image above

late finch
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I learned trig

dusky cedar
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I never learned trig

late finch
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😱

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then how

late finch
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without trig?

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😢

dusky cedar
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I use pictures

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Well more like animations

late finch
late finch
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i learned trig from my dad's old books

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just happen to come across it when I was grade 7 or something

dusky cedar
late finch
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?

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😱

dusky cedar
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The animations don't look like this

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But it's the closest I could find

late finch
dusky cedar
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It's more darker not this clear

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It's like dots moving in a dark room

late finch
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You trolled me

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it more like math.clamp

late finch
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So you sucked yourself with a vaccum cleaner

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Sound like a good way

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to learn math

dusky cedar
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But that's normally if Im working something out I don't understand

late finch
dusky cedar
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It's hard to see where the dots go

late finch
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is there an alternative to math.clamp that only limit max

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not min

dusky cedar
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There is min and max

late finch
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these gif?

dusky cedar
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To find the pattern

late finch
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and find largest number

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I tested it

dusky cedar
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Max gets the largest number and min gets the lowest number

late finch
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So it don't limit number

dusky cedar
late finch
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no?

dusky cedar
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Math.min(fov, 80)

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If fov is 70 what will that return

late finch
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yeah

dusky cedar
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What's smaller 70 or 80

late finch
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But alpha need math.clamp

dusky cedar
late finch
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you said math.max can limit

dusky cedar
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They both limit

late finch
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I just need value between 1 and 0

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for alpja

dusky cedar
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Can alpha go below 0

patent brook
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🤑

late finch
dusky cedar
patent brook
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how the hell

late finch
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It doesn't limit

patent brook
# 
local char = script:FindFirstAncestorOfClass("Model")
local root = char:WaitForChild("HumanoidRootPart") :: BasePart
local rs = game:GetService("RunService")
local camera = workspace.CurrentCamera

local fovVelocityRatio = 100 / 20
local minFOV = 90
local maxFOV = 140

local function lerp(s, e, t)
    local d = (e - s) * t
    return s + d
end

rs.RenderStepped:Connect(function(deltaTime : number)
    local velocity = root.AssemblyLinearVelocity * Vector3.new(1, .2, 1)
    camera.FieldOfView = lerp(camera.FieldOfView, math.clamp(velocity.Magnitude * fovVelocityRatio, minFOV, maxFOV), deltaTime * 5)
end)
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heres my code for FOV, might help

late finch
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Yeah I know

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I want to add easing style

late finch
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I didn't plug delta yet

patent brook
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^^

dusky cedar
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Think of alpha like time

patent brook
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when you lerp it will make something like Quint Out

late finch
patent brook
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i do lerping

late finch
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So when player velocity is zero

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it start decrease

dusky cedar
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When you add you use min

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And when you subtract you use max

late finch
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But is that faster?

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than clamping?

dusky cedar
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Clamp is like min and max together

late finch
dusky cedar
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Math.min(Math.max(fov, 30), 80)

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This is clamp

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But clamp is more optimal then what I showed above

late finch
dusky cedar
late finch
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seem not right

dusky cedar
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If X < min then return min end
If X > max then return max end
Return X

late finch
dusky cedar
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Min is top

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Max is bottom

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Clamp is both

late finch
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yes

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I know