What are you working on currently? (2021)

mer5000 · December 15, 2021, 10:38pm

A small warehouse located opposite of the motel…

ShockwaveProductions · December 15, 2021, 11:07pm

Researching 2D collisions to deal with a potential edge case for my 2D engine.

Nobody told me there would be this much math!

puinn · December 16, 2021, 12:35am

update: making random generation system using all these assets (ITS HARD)

Crazedbrick1 · December 16, 2021, 12:41am

Yo! Is that my free model?

Qbizh · December 16, 2021, 1:13am

Is that an RTX 3080? (my dream graphics card)

ertaewr · December 16, 2021, 1:22am

So close!
It´s the rtx 3070 Founders Edition from Nvidia.
Check the post here:
(Pc component feedback (RTX 3070 Founders Editon))

AndyJrCountyWood465 · December 16, 2021, 2:29am

I just made an NYS Trooper Lightbar (I tried my best)

JugglesFatBoy · December 16, 2021, 3:14am

I am currently creating wireless systems for a Touring Production. My old Furman (Posted here previously) with the new Shure UA845UWB Ultra Wide Band Antenna

Below are mock wireless systems that will be replaced with actual SurfaceGuis in the near future.

A_SquaredAnimations · December 16, 2021, 4:25am

3d printing my roblox avatar (excuse the crappy camera angles and lighting)

1Baxter2 · December 16, 2021, 9:55am

I am making a 2d side scrolling adventure/platforming game.

koziahss · December 16, 2021, 10:43am

https://devforum.roblox.com/t/coder-challenge-the-fourth-dimension/1565756/23

I managed to code a place with 4D hypersphere collision.

It’s a bit counter intuitive. was initially going to reply there but it got locked.

Code

-- Code

local VelocityW = 0 -- CurrentVelocity in 4 dimension
local PositionW = math.random(-8,8) -- Position of hypersphere in 4D
local RadiusW = 4 -- Radius of sphere MAX

-- Position  is of central 4d axis so we get proper values.

local THIRD_DIMENSION_W = 0 -- Plane does not move in relation to 4 Dimension...yet

local Collision = script.Parent.Collision
local Intersection = script.Parent.Visualize

local RunService = game:GetService("RunService")

local cos = math.cos
local acos = math.acos
local sqrt = math.sqrt

local rad = math.rad
local deg = math.deg

local pi = math.pi

local tan = math.tan


local clamp = math.clamp 	-- They cannot escape

local abs = math.abs --hard abs

-- Radius of intersection calculated by cosine. Intersection always happens at W = 0 so angle is always Cos distance from 0
local Debounce = false

local function lerp(from: number, to: number, alpha): number -- prelerprel
	local diff = to - from
	diff *= alpha
	return from + diff -- ff
end
	
	
	
Intersection.Touched:Connect(function(otherPart: BasePart)
	if Debounce or otherPart.Name ~= "HumanoidRootPart" then return end -- collide only pp hitbx cus other cannot hit
	Debounce = true
	
	local CF = otherPart.AssemblyLinearVelocity.Magnitude
	-- LimitCollision force speed 
	local A = abs(PositionW - THIRD_DIMENSION_W) / RadiusW
	local B = 0
	if A < 1 then -- haha no edge go away
		B = lerp(B,CF,A)
	end
	VelocityW += B
	
	Debounce = false
end)

local function Stepped(runTime: number, deltaTime: number)
	--PositionW = -10 + runTime
	
	PositionW += VelocityW * deltaTime
	PositionW = clamp(PositionW,-16,16)
	local DIFF = abs(PositionW - THIRD_DIMENSION_W)
	local A = DIFF / RadiusW -- CAH
	local B = DIFF^2
	local C = RadiusW^2
	local D = 2 * DIFF * RadiusW *  A -- SAS
	local E = B + C - D
	local F = sqrt(E) -- neg as
	
	if F ~= F then -- neg as -ind(nan) no visualze bc size < 0
		Intersection.Transparency = 1
		Intersection.CanCollide = false
	else
		Intersection.Transparency = 0
		Intersection.CanCollide = true
	end
	Intersection.Size = Vector3.new(F,F,F)--Boom wonderful variable names
end

RunService.Stepped:Connect(Stepped)

local ChangeUp = workspace.ChangeUp
local ChangeDown = workspace.ChangeDown


ChangeUp.Touched:Connect(function()
	if Debounce then return end
	Debounce = true
	THIRD_DIMENSION_W += 1
	task.wait(0.1)
	Debounce = false
end)


ChangeDown.Touched:Connect(function()
	if Debounce then return end
	Debounce = true
	THIRD_DIMENSION_W -= 1
	task.wait(0.1)
	Debounce = false
end)

EternalEthel · December 16, 2021, 11:16am

This is really neat! From my understanding, 4th dimension collision is when you interact and collide with an object that is in an intersecting plane of reality, causing it to phase and the rift between our plane and its normal plane, right?

Just curious, is the object just getting scaled or is there an actual simulated ‘4th dimension’ where the objects go and move around, then eventually reappear? Also, where is that code placed in the explorer?

koziahss · December 16, 2021, 11:38am

Yes there is an actual 4 dimension here. The only thing that might not be right is how I have handled collisions and velocity. I had a hard time understanding how collisions between a 3D character object would interact. So I made a couple of assumptions.

The Walls are infinitely huge in the 4D plane (Ball won’t phase through wall)
The Character is only a 3D object(Ball can phase through character)

This video you can see how they phase out of existence

I am able to calculate how large the intersection between the 3D should be using the law of cosines.
It looks like this

Yeah. I don’t think I will be able to create 4D Cubes unless I study more maths lol.

I think I am almost correct to assume that the 4D hyperspheres moves the same however I can’t “negate” the collision of the normal 3D sphere unless there is a Vector4 Module out there.

EternalEthel · December 16, 2021, 12:22pm

@koziahss

Huh very interesting. It is definitely impressive you got this far, but to further you really should implement the dicing where an object can be half-phased instead of smaller.

@Maxx_J

How do you create the wall destruction? I assume it might be procedural, but if not and it is actually just cubes, then what do you do to the cubes upon impact?