Hello Guys,
Today I’ve written a little script and I just want to share it with you 
The story in short: today I’ve tried to find a script on on the web to make freehand polygons on Roblox GUI (sg like in Godot).
I had no luck, so I wrote one to myself…
I plan to make it more flexible in the weekend, e.g. enabling filled shapes and to create a shape as one object and to move, resize them etc. That probably will be a paid solution for some Robux (will be a more serious work), but the core of the math is free, you can access the demo game with the code here:
This is one single script with 90 lines + 3 GUI objects only, probably the simplest project I’ve ever shared but I think it can help for some of you too.
The function that draws a line between two GUI points (a1 and a2):
function drawCandidate(a1:Vector3,a2:Vector3)
local x1:number = (a1.X + a2.X) / 2
local y1:number = (a1.Y + a2.Y) / 2
line.Position = UDim2.fromOffset(x1,y1)
line.Size = UDim2.fromOffset((a2-a1).Magnitude, lineWidth)
local r = math.deg(-math.asin(CFrame.new(a1,a2).LookVector.X)-math.pi/2)
if a2.Y<a1.Y then r = -r end
line.Rotation = r
end
(line is a Frame object, anchorpoint set to 0.5,0.5 - see in the demo!)
That’s all, I hope you find it useful!
Check out all of my stuffs, demos, games and plugins
Have a nice day!