Help on Random Boulder Position Generator

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#1

Hello Devs!

I’m trying to create a random Boulder Generator for my game (or experience roblox likes to call).

In the output it shows invalid argument #1 to 'random' (number expected, got Vector3)

The script (its just one)

local Boulders = game.ReplicatedStorage.Boulders:GetChildren()

function GenerateBoulders(howmany)
	if howmany > 0 then
		for z = 1, howmany do
			local RandomCorner = math.random(Vector3.new(workspace.Corner1.Position),Vector3.new(workspace.Corner2.Position))
			local RandomBoulder = Boulders[math.random(#Boulders)]:Clone()
			RandomBoulder.Parent = workspace
			RandomBoulder.Position = RandomCorner
		end
	end
end

Any help is allowed!

#2

So what you can do is save the positions in a table.

local PositionsTable = {
   ["Corner 1"] = {123,24,243}, -- Position after the equals " = "
   ["Corner 2"] = {213, 12, 465},
   -- So on
}

-- Now you can just do 
local RandomCorner = math.random(#PositionsTable)
RandomBoulder.Position = CFrame.new(PositionsTable[RandomCorner])

I believe this should work, However this was a bit rushed. Just to let you know you can only randomise integers/numbers, not vectors, Cframes etc.

If the numbers aren’t fixed then after the equals in the table you can just do workspace.Corner1 and then when called add .Position at the end.

#3

math.random requires a Number value, not a Vector3 value

You’ll have to reference it in a different way, by choosing a random number of 1 & 2 instead, then positioning it to that specified place

local Boulders = game.ReplicatedStorage.Boulders:GetChildren()

function GenerateBoulders(howmany)
	if howmany > 0 then
		for z = 1, howmany do
            local RandomCorner
            local RandomPos = math.random(1, 2)

            if RandomPos == 1 then
			    RandomCorner = workspace.Corner1.Position		
            elseif RandomPos == 2 then
			    RandomCorner = workspace.Corner2.Position		
            end	

            local RandomBoulder = Boulders[math.random(#Boulders)]:Clone()
			RandomBoulder.Parent = workspace
			RandomBoulder.Position = RandomCorner
		end
	end
end

Unless if you want the the boulders to be positioned in-between those 2 corner positions, then you’d need to “Lerp” them

#4

image

Your code made that the boulders are only at the corners, Not inbetween them. (i forgot to add on this topic that its inbetween the corners.)

#5

image

Your code created an error

#6

I see, so you’d need to lerp between the 2 positions then

Try doing this?

local Boulders = game.ReplicatedStorage.Boulders:GetChildren()
local Corner1 = workspace.Corner1
local Corner2 = workspace.Corner2

function GenerateBoulders(howmany)
	if howmany > 0 then
        local 
		for z = 1, howmany do
            local PositionRandomizer = math.random(1, 100) * 0.01
            local RandomBoulder = Boulders[math.random(#Boulders)]:Clone()
			RandomBoulder.Parent = workspace
			RandomBoulder.Position = Corner1.Position

            RandomBoulder.Position:Lerp(Corner2.Position, PositionRandomizer)
        end
	end
end
#7

image

This time its stuck in only one corner.

#8

This might be due to the fact that there’s literally no cooldown in-between the loop

Not sure if this would fix it

local Boulders = game.ReplicatedStorage.Boulders:GetChildren()
local Corner1 = workspace.Corner1
local Corner2 = workspace.Corner2
local RunService = game:GetService("RunService")

function GenerateBoulders(howmany)
	if howmany > 0 then
        local 
		for z = 1, howmany do
            local PositionRandomizer = math.random(1, 100) * 0.01
            local RandomBoulder = Boulders[math.random(#Boulders)]:Clone()
			RandomBoulder.Parent = workspace
			RandomBoulder.Position = Corner1.Position

            RandomBoulder.Position:Lerp(Corner2.Position, PositionRandomizer)
            RunService.Heartbeat:Wait()
        end
	end
end
#9

Uhh, It’s doing the same effect.

Also, You placed a random local with no variable set. I removed that so it can execute without errors

#10

Ok so after doing some quick searching I was configuring the loop wrong

I need to actually set its position, then Lerp it next whoops.mov

local Boulders = game.ReplicatedStorage.Boulders:GetChildren()
local Corner1 = workspace.Corner1
local Corner2 = workspace.Corner2
local RunService = game:GetService("RunService")

function GenerateBoulders(howmany)
	if howmany > 0 then

		for z = 1, howmany do
            local PositionRandomizer = math.random(1, 100) * 0.01
            local RandomBoulder = Boulders[math.random(#Boulders)]:Clone()
			RandomBoulder.Parent = workspace
			RandomBoulder.Position = Corner1.Position:Lerp(Corner2.Position, PositionRandomizer)
            ---RunService.Heartbeat:Wait()
        end
	end
end

Try doing this :thinking: I believe this should work

#11

It does work but its on a straight line… But don’t worry i can uhh deal with it i guess

#12

Thing is though, were you wanting to create random positions for the Boulders between the 2 corners? Or just near them? Cause you could add an offset value so that they’re in-between 1 corner & yet still able to roll (Still a bit confused)

#13 
function RandomWithinPart(Part)
    local randomCFrame = Part.CFrame * CFrame.new(random:NextNumber(-Part.Size.X/2,Part.Size.X/2), random:NextNumber(-Part.Size.Y/2,Part.Size.Y/2), random:NextNumber(-Part.Size.Z/2,Part.Size.Z/2))
    return randomCFrame
end

This function will give you a random cframe within a part. I would just make one big, anchored, no collided, non-touchable part that has no physics sim attached and is completely transparent. This will account for rotation/orientation of the part as well. This is the same way ZonePlus does their Zone:getRandomPoint() method. You will need an instance of Random defined as random somewhere in the script.

#14

between the 2 corners, so it spawns around the map.