Does anyone know how to replicate the destruction physics in this game?

[FractalVortex]

I’m trying to make a game and I need a destruction physics system almost exactly like the destruction physics used in this game 💥 Destruction Simulator - Roblox

Does anyone know how this is done?

[woblot_t (woblot)]

Explosion instances are an easy way to add explosions into your game:

local explosion = Instance.new("Explosion")
explosion.BlastRadius = 60
explosion.ExplosionType = Enum.ExplosionType.Craters -- damages terrain
explosion.Parent = workspace

you can find their docs here: Explosion | Documentation - Roblox Creator Hub

additionally, you can set a position and use Debris service to get rid of the parts after they’ve been exploded:

local Debris = game:GetService("Debris")
local partDestroyTimer = 3

local explosion = Instance.new("Explosion")
explosion.BlastRadius = 60
explosion.ExplosionType = Enum.ExplosionType.Craters -- damages terrain
explosion.Position = Vector3.new(0, 10, 0)
explosion.Parent = workspace

local function partHit(hit: BasePart, dist: number)
Debris.AddItem(hit, partDestroyTimer)
end

explosion.Hit:Connect(partHit)

debrisservice docs: Debris | Documentation - Roblox Creator Hub

these code samples are samples and may not work perfectly; they’re just examples

[FractalVortex]

Do you think this game used WeldConstraints and broke them upon collision?

[woblot_t (woblot)]

yes, most likely – i saw in your recent posts that you used anchored parts, which may not work as well. If you need to weld many parts at the same time, Roblox Studio has a built-in function that you can use if you go to the tab where you can create constraints. you can select a group of parts, and click on the WeldConstraints button to automatically weld a group of parts

there’s also plugins that automatically weld parts for you

[FractalVortex]

Okay perfect. I made a script that I think should work.

Do you see any flaws?

local projectile = script.Parent

-- // This function runs second!

local function CollateralDamage(parts)
	for i, v in pairs(parts) do
		v.BrickColor = BrickColor.new("Cyan")
		local instances = parts:GetDescendants()


		for _, weld in pairs(instances) do
			local chance = math.random(1, 2)
			if weld.ClassName == "WeldConstraint" and chance == 1 then
				weld:Destroy()
			end
		end

	end
end

-- // This function runs first!

local function DamageStructure(hit)
	hit.BrickColor = BrickColor.new("Really red")
	local instances = hit:GetDescendants()
	for i, v in pairs(instances) do
		if v.ClassName == "WeldConstraint" then
			v:Destroy()
			local touchingParts = hit:GetTouchingParts()
			CollateralDamage(touchingParts)
		end
	end
end


-- // Detect when projectile has come in contact with a part
projectile.Touched:Connect(function(hit)
	DamageStructure(hit)
end)

Also something I’ve been wondering for a while, is there a difference between using
for _, v in pairs()
and
for i, v in pairs()

And is the pairs() portion necessary?

[dutycall11 (SavageMode)]

The only difference is that when using the underscore, you won’t be able to get the index. So you won’t know the “i”

[FractalVortex]

Oh, I completely misunderstood what you said regarding the explosion instance. That’s exactly what I was looking for! I must’ve accidently skimmed over it the first time I read your reply. Thank you, that’s the solution!