How to make something revolve around a sphere?

Help and Feedback Scripting Support
,
#1

Hey! I was wondering how to make something like in the video I sent in this post. I know it probably has to do with CFrames, although, CFrames really arent my strong suit. If someone can help me out, or at least point me in the right direction I would be thankful!

#2

Create a red cylinder, make sure it’s anchored, and rotate it like so:

local redCylinder = red cylinder goes here 
local brownBall = brownBall goes here 

redCylinder.Position = ball.Position -- positions the cylinder to the balls position

--about every 1/30th of a second, do the code inside this while loop:
while true do 
    wait() 
    --rotate the red cylinder 1 degree in each direction 
    redCylinder.CFrame = redCylinder.CFrame * CFrame.Angles(math.rad(1), math.rad(1), math.rad(1))
end
1 Like
#3

You could just weld the parts together. This will also save on performance.

#4

Why would it save performance?

#5

There was an error within your script so I would only be able to do it to one sphere and not any others. I managed to fix this by simply grouping the objects and placing the script within each of them then I set the variables to the objects within the models.

#6

Alright, cheers!

Another thing you can do is make every ball / sphere it’s own model and then group all of those ball / sphere models into a group.

Then you can do:

local ballModels = model that holds all of the balls should be linked here

function spinModel(model)
    local redCylinder = model["NAME OF RED CYLINDER GOES HERE"]
    local brownBall = model["NAME OF BROWN BALL GOES HERE"]

    redCylinder.Position = ball.Position -- positions the cylinder to the balls position

    --about every 1/30th of a second, do the code inside this while loop:
    while true do 
        wait() 
        --rotate the red cylinder 1 degree in each direction 
        redCylinder.CFrame = redCylinder.CFrame * CFrame.Angles(math.rad(1), math.rad(1), math.rad(1))
    end
end

--look at each item in the ball models group:
for _, item in pairs(ballModels:GetChildren())do
    --if the item is one of the sphere models, 
    if item:IsA("Model") then
        --rotate that sphere model:
        coroutine.wrap(spinModel)(item)
    end 
end