How would I make a draggable lever?

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#1

Hello, everyone.

My question is: What is the concept or best approach I should take regarding making levers that could be dragged by the mouse?

-coolguyweir

3 Likes
#2

Could you elaborate on what you mean by lever?

#3

well, say we have a lever like this:
https://www.google.com/imgres?imgurl=https%3A%2F%2Fstatic.wikia.nocookie.net%2Fguilds%2Fimages%2F7%2F73%2FLeverofdoom08.gif%2Frevision%2Flatest%3Fcb%3D20120126103607&imgrefurl=https%3A%2F%2Fneopets.fandom.com%2Fwiki%2FLever_of_Doom&tbnid=IFjkQauv3JyyKM&vet=12ahUKEwjg94OWhLf2AhWPO80KHdXTBHsQMygFegUIARDkAQ..i&docid=MLFAsZEaxv0m5M&w=300&h=300&q=lever%20pull&client=safari&ved=2ahUKEwjg94OWhLf2AhWPO80KHdXTBHsQMygFegUIARDkAQ
image
How would I allow a user to drag it with the mouse?

#4

Do you mean like a Gui or an actual 3d lever in the workspace?

#6

Could you use a ClickDetector and a HingeConstraint set to Servo to move the lever, or do you need it to be actually moved with the mouse movement?

#7

I want it to move with mouse movement. It’s literally as if the mouse is your hand.

#8

I’m not sure about how to grab the lever with the mouse, but I’d suggest moving the lever with a HingeConstraint and the ActuatorType set to Servo.
I think you’d somehow have to transfer the Mouse.Target value to the Hinge servo TargetAngle value.

#9

can you explain a bit more in detail on how I would transfer mouse.target to hinge servo targetangle?

#10 
local grabbing = false
on Mouse1 down
    if mouse.Target == Lever then
        grabbing = true


on Mouse1 up
    grabbing = false

local top = camera:WorldToScreenPoint(topOfLeverPanelVector3)
local bottom = camera:WorldToScreenPoint(bottomOfLeverPanelVector3)
while wait(1) do
    if not grabbing then continue end
    check if mouse.Y is in-between, above, or below the 2d positions (top & bottom)
    normalize mouse.Y for maxAngle and minAngle
    set servo angle to normalized angle
end
2 Likes
#11

Hi! I mostly get your solution, but can you explain to me, in those last two lines, what “normalizing” means in terms of the angles?

#12

If your lever’s max angle is 180 for all the way up and min angle 0 for all the way down then you just need to figure out how far from the bottom point that the mouse’s Y position is (as a percentage)

now if your mouse’s position is in the middle (50% in-between) then you do 180*.50 to get 90 deg (lever in the middle)

I was messing around with it but the math was off and I don’t want to spend too much time on it…
you can try to fix it yourself:
Lever.rbxl (33.5 KB)

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